Liebert iTRUST UPS System
User Manual
E1-20020516-C-1.0
L i e b e r t C o r p o r a t i o n
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Contents
Chapter 1 Introduction .....................................................................................................................1
1.1 Basics.................................................................................................................................1
1.2 Configuration ......................................................................................................................1
1.3 Operation Theory................................................................................................................2
1.4 Structure and Layout ..........................................................................................................3
1.5 Operation Modes................................................................................................................4
1.6 Basic Functions ..................................................................................................................8
1.7 Specifications .....................................................................................................................8
Chapter 2 Cabinet Installation .......................................................................................................13
2.1 Environmental Conditions.................................................................................................13
2.2 Unpacking.........................................................................................................................13
2.3 Dimensions.......................................................................................................................13
2.4 Transportation ..................................................................................................................16
2.5 Positioning of UPS............................................................................................................16
2.6 Cable Access....................................................................................................................18
2.7 Ventilation.........................................................................................................................19
2.8 Layout of Cabinet .............................................................................................................20
Chapter 3 Electrical Assembly.......................................................................................................23
3.1 Selection of cables ...........................................................................................................23
3.1.1 Current carrying capacity of cables ........................................................................23
3.1.2 Selection of power cables.......................................................................................23
3.1.3 Selection of signal cables.......................................................................................24
3.2 Cable connections............................................................................................................24
3.2.1 Power cables..........................................................................................................24
3.2.2 Signal cable............................................................................................................28
3.3 Connection of Single UPS System ...................................................................................35
Chapter 4 Commissioning of UPS .................................................................................................37
4.1 Startup Procedure ............................................................................................................37
4.1.1 Explanation of Circuit Breakers ..............................................................................37
4.1.2 Startup....................................................................................................................37
4.2 Setting the functions.........................................................................................................38
4.3 Functional checks.............................................................................................................40
4.3.1 Check the function of the display panel..................................................................41
4.3.2 Switching between operation mode........................................................................41
Chapter 5 Operation of Display Panel ...........................................................................................43
5.1 Display panel....................................................................................................................43
5.1.1 Layout of Display Panel..........................................................................................43
5.1.2 LED Indication........................................................................................................44
5.1.3 Functional Keys......................................................................................................45
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5.1.4 Alarm Buzzer..........................................................................................................46
5.1.5 LCD and Menu Keys..............................................................................................46
5.2 The displayed information ................................................................................................48
5.2.1 Opening display ......................................................................................................48
5.2.2 Main Menu Display.................................................................................................48
5.2.3 UPS Basic Information...........................................................................................48
5.2.4 Menu Keys Display Window...................................................................................49
5.2.5 Information of main menu.......................................................................................50
5.3 Function Setup.................................................................................................................54
5.3.1 Language setup .....................................................................................................54
5.3.2 Address setup ........................................................................................................55
5.3.3 Time setup .............................................................................................................55
5.3.4 Manual battery self-test..........................................................................................58
5.3.5 Contrast adjustment...............................................................................................59
5.3.6 History log ..............................................................................................................59
5.3.7 background communication setup..........................................................................60
5.3.8 Call-back number setup ..........................................................................................61
5.4 Prompt window.................................................................................................................63
5.5 Events and State Information:..........................................................................................66
Chapter 6 Maintenance .................................................................................................................69
6.1 Setup procedures.............................................................................................................69
6.1.1 Start up...................................................................................................................69
6.1.2 Shutdown ...............................................................................................................70
6.1.3 Transferring between operation modes..................................................................71
6.1.4 Emergency shutdown and recovery.......................................................................71
6.1.5 Mute.......................................................................................................................72
6.1.6 Fault clear ..............................................................................................................72
6.1.7 Monitoring system..................................................................................................73
6.1.8 Input and output contacts........................................................................................75
6.1.9 Temperature measuring.........................................................................................76
6.2 Maintenance.....................................................................................................................76
6.2.1 Daily maintenance..................................................................................................76
6.2.2 Battery maintenance ..............................................................................................78
6.2.3 Shutdown maintenance..........................................................................................80
Chapter 7 Troubleshooting............................................................................................................81
7.1 UPS system troubleshooting............................................................................................81
7.1.1 Basics.....................................................................................................................81
7.1.2 Procedures.............................................................................................................81
7.2 LED indicator....................................................................................................................81
7.2.1 LED display............................................................................................................81
7.2.2 LED indicator of lightning protection device ...........................................................82
7.3 Buzzer alarm....................................................................................................................82
7.4 LCD indication for fault information ..................................................................................83
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Chapter 8 Parallel System.............................................................................................................87
8.1 System Introduction..........................................................................................................87
8.1.1 Basics.....................................................................................................................87
8.1.2 Theory of Operation...............................................................................................88
8.1.3 Operation modes....................................................................................................90
8.2 Installation ........................................................................................................................91
8.2.1 Cabinet installation .................................................................................................91
8.2.2 Electrical installation...............................................................................................92
8.3 External Power Distribution ..............................................................................................93
8.4 Start up of Parallel Operation System ..............................................................................93
8.5 Using the Parallel Operation System................................................................................94
8.5.1 Switch on the Parallel System................................................................................94
8.5.2 Shutdown the Parallel Operation System...............................................................95
8.5.3 Transferring between Operation Modes .................................................................96
8.5.4 Repairing the failed UPS unit in parallel operation system.....................................97
8.5.5 Emergency shutdown.............................................................................................98
8.5.6 Fault and Fault Process Methods...........................................................................99
Chapter 9 Optional Parts .............................................................................................................101
9.1 Battery............................................................................................................................101
9.1.1 Capacity selection ................................................................................................101
9.2 Battery cabinet................................................................................................................102
9.2.1 External Dimensions.............................................................................................102
9.2.2 Installation of battery cabinet................................................................................103
9.2.3 Wiring of the batteries...........................................................................................103
9.3 SNMP Card and the Software ........................................................................................106
9.3.1 Product structure and ports ..................................................................................106
9.3.2 Technical features ................................................................................................106
9.4 Network Software ...........................................................................................................107
9.5 MODEM..........................................................................................................................107
9.6 Temperature sensor TMP12Z.........................................................................................108
9.7 Level C Lightning Protection System SPD24Z...............................................................108
9.7.1 Introduction of SPD24Z ........................................................................................109
9.7.2 Installation procedures of SPD24Z.......................................................................109
9.7.3 Using and Maintenance.........................................................................................111
9.8 Bypass Isolation Transformer.........................................................................................111
Chapter 10 Service after Sales....................................................................................................112
10.1 Abnormal Fault Handling..............................................................................................112
10.2 Technical support .............................................................Error! Bookmark not defined.
10.3 Warranty.......................................................................................................................115
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Chapter 1 Introduction
Chapter 1 Introduction
1.1 Basics
The Liebert iTrust UPS System is connected between the utility source and the
critical load to provide uninterruptible power to the load. The power from the UPS
being free of voltage and frequency variation and disturbances from utility. The UPS
has an output isolation transformer to provide galvanic isolation between the load
and utility. The UPS also uses the latest in high frequency double conversion
PWM technology and a fully digital control.
It also has advanced network management functions.
1.2 Configuration
The UPS consists of the following modules : rectifier, inverter, static bypass,
maintenance bypass, output isolation transformer, inverter static switch, battery and
input and output circuit breakers.
As shown in Figure 1-1, the AC utility source is input at Q1 and the rectifier
converts the AC Utility into DC source. The Inverter will convert the DC source or
the DC source from the batteries into AC source that is output from the isolation
transformer. The battery will power the load through the inverter in case of a power
failure. The utility source can also power the load through the static bypass.
Besides this, if maintenance or repair of the UPS is necessary, the UPS can
support the load through the maintenance bypass without interrupting the load.
Figure 1-1 Theory of UPS
1
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Chapter 1 Introduction
1.3 Operation Theory
The UPS circuit diagram is shown in Figure 1-2.
AC2
TR1
Q1
L1
FU1
FU2
FU3
KM1
KA1
A1
B1
C1
Res1
Res2
Q2
A2
B1
C1
N2
KM2
BP
BN
DC1
Res3
Q3BP
FU4
Q5
U
V
W
N
FU5
FU6
AC4
AC3
TR2
DZN6
Figure 1-2 Main circuit of UPS
The utility source is input at Q1 and flows through the fuse, the transformer,
inductor and into the high frequency rectifier which will convert the AC power into
DC power. The rectifier has PFC and charger function and make use of soft start
and DSP digital technology to improve the system immunity against surge, improve
the stability of the DC bus voltage, reduce the charging current ripple and prolongs
the battery life.
The battery is connected to the UPS through contactor. If the DC bus voltage drop
through certain threshold, then the contactor will activate to connect the battery to
the DC bus. The battery will supply the DC power to the inverter through a filtering
circuit.
The inverter uses digital vector control technology based on DSP to modulate six
IGBTs through SVPWM and invert DC power to AC three phase power.
The output is isolated from the load by Delta/Zig-Zag transformer, static switch,
fuse and circuit breakers.
The bypass source is input at Q2 and output through the bypass static switch.
2
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Chapter 1 Introduction
The double DSP and MCU form the full digital control system to realize the powerful
function of the UPS. The switching between the operation modes is realized by
controlling the bypass static switch and the inverter static switch. Advanced battery
management prolongs battery life.
Multi-communication ports and management software make it possible for the
customer to monitor the UPS performance locally or remotely. The Liebert UPS
uses full digital, discrete and on-line parallel operation technology. In parallel
operation, several UPS units input parallel logic signals and cross current detection
signals through parallel operation boards to enable a maximum of four UPS units to
operate in parallel. (N+X) redundancy parallel operation, capacity expansion and
hot-standby configuration can be realized. If an additional UPS is required to be
added to the system, no auxiliary equipment is required and power to the load
need not be interrupted.
1.4 Structure and Layout
The structure and layout of the system is shown on Figures 1-3 and 1-4. The
system consists of the rectifier, inverter, auxiliary power supply, input and output
power distribution, monitoring system, parallel control system, lightning protection
unit, EMI filter, fan and input and output isolation filters.
1:Fan
2:rectifier
3:two auxiliary power supply boards ULW2L61M5
4:contactor
7:Inverter
5:battery input terminals 6:circuit breaker Q3BP for maintenance
8:Power distribution board ULK2L61R1
9:D level lightning protection device SPD12Z
10: Output circuit breaker Q5
12:bypass input circuit breaker Q2
14:LCD
11:rectifier input circuit breaker Q1
13:operation keypad board ULW2L61K1
15:parallel board ULW2L61M3
17:4 leveling feet (M20)
16:monitoring board ULW2L61U2
Figure 1-3 Components of 20/30kVA UPS
3
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Chapter 1 Introduction
Front view
1:Fan
2:rectifier
3: softstart relays
4:contactor
5: two auxiliary power supply boards ULW2L61M5
6: D level lightning protection device SPD12Z
8:battery input terminals
7: Hall current sensor
9:circuit breaker Q3BP for maintenance
11:bypass input circuit breaker Q2
13: fast fuse
10:rectifier input circuit breaker Q1
12:Inverter
14: parallel board ULW2L61M3
16: magnetic core
15: EMI board ULW2L61M4
17: output circuit breaker
19: LCD
18:operation keypad board
20: monitoring board ULW2L61U2
22: Fuse NT100
21: Battery EMI board
23: 4 leveling feet (M20)
Figure 1-4 Components of 40/60kVA UPS
1.5 Operation Modes
1. Normal mode
When the utility is normal, the UPS powers the load through the rectifier and
inverter and charges the batteries at the same time, as shown in Figure 1-5. This is
called the Normal Mode.
4
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Chapter 1 Introduction
Bypass
Mains
output
~
-
-
~
Figure 1-5 Normal mode
2. Battery Mode
When the utility fails, the UPS system will switch to battery mode without
interruption and the battery will power the load through the inverter.
The UPS can return to normal mode automatically when the utility returns to normal,
as shown in Figure 1-6.
Bypass
Mains
output
~
-
-
~
Figure 1-6 battery mode
3. Bypass Mode
In the event of an inverter overload which last longer than the typical time, an
output short circuit or a fault on the inverter, the UPS will transfer the load to bypass.
There are two kinds of bypass modes. In the first kind, the UPS can be set to
return to normal mode automatically when the fault is cleared. In the second kind,
the UPS is set to return to normal mode only with a manual transfer.
When the main UPS circuit fails, the battery is depleted or a severe fault occurs,
the inverter will be shut down and the system will remain in the bypass mode. The
system can return to normal mode only with a manual reset after the fault is cleared,
as shown in Figure 1-7.
Bypass
Mains
output
~
-
-
~
Figure 1-7 bypass mode
5
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Chapter 1 Introduction
4. ECO Mode
If the load has no requirement for power quality but has a high requirement for
efficiency, then the UPS can be set in ECO mode. In this mode, the system will
power the load through the static bypass switch and the rectifier will charge the
batteries. When the bypass source fails or out of normal range, the UPS will revert
back to normal mode and powers the load through the batteries. The total transfer
time will be less than 15 msecs. When the bypass source recovers back to normal,
the system will return to ECO mode automatically and the system efficiency is
greatly improved, as shown in Figure 1-8. Note that the ECO mode function can
only be set by qualified personnel and applies to single UPS modules only.
Bypass
Mains
output
~
-
-
~
Figure 1-8 ECO mode
5. Maintenance Mode
When the UPS has to be repaired or has to undergo routine maintenance, the UPS
can be set to maintenance mode by switching on the maintenance bypass circuit
breaker. The load will be powered from the maintenance bypass supply without
interruption.
During maintenance, the circuit breakers Q1, Q2, QF1 and Q5 should be switched
off to ensure the safety of maintenance personnel. See Figure 1-9.
Q3BP
Q2
Bypass
Q1
Q5
Mains
Output
~
-
-
~
QF1
Figure 1-9
6
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Chapter 1 Introduction
6. United Power Mode
When the utility is not available and the capacity of the generator set is inadequate
to support the load, the battery will power the load together with the generator
automatically. The operating time under this mode should not exceed the autonomy
time of the batteries, as shown in Figure 1-10
ꢀ Note :
This mode can only be set by qualified personnel only.
Bypass
Mains
output
~
-
-
~
Figure 1-10
7. Parallel Operation mode
When several UPS units (maximum four units) are in parallel operation mode, they
will share the load automatically amongst themselves. If one unit fails, this unit will
be shut down automatically and the remaining units will share the load equally. If
overload occurs, the UPS will transfer to bypass operation mode. Parallel operation
mode also has normal mode, battery mode, bypass mode, maintenance mode and
united power mode.
8. Dual Input Mode
The main circuit and the bypass can use the same or different sources. The input
methods are shown in Figure 1-11 and Figure 1-12.
Mains
output
~
-
-
~
Fig 1-11
7
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Chapter 1 Introduction
Bypass
Mains
output
~
-
-
~
Fig 1-12
1.6 Basic Functions
Battery Management Function - The UPS has advanced battery management
functions including battery fault detection and backup time forecast.
Soft Start Function - Complete delay soft start function can reduce the surge to the
UPS unit and utility source.
Alarm and Protection Function - The UPS can generator audible and visual alarm
through LCD, input/output contacts and network transmission. It can help
maintenance personnel to locate and clear the faults that are sent out in time,
accurately and in detail.
Dark Start Function - When the utility is unavailable, the UPS can start from battery
that is connected to the DC Bus.
Automatic Re-start when Utility returns - This function only applies to the UPS that
has batteries. The UPS shuts down due to low battery, and restart automatically
when the utility returns. At this time , its operation mode is the one before the utility
fails.
Monitoring Functions - The UPS monitoring system has an advanced monitoring
function and parallel control functions. It supports flexible network monitoring to
satisfy different customer requirements.
1.7 Specifications
1. Functional Parameters
8
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Chapter 1 Introduction
Parameters of Liebert iTrust UPS are given in Table1-1
Capacity
Model
20kVA
30kVA
40kVA
60kVA
UL33-0200L UL33-0300L
UL33-0400L
UL33-0600L
Input Voltage
AC Power Input
Power Factor
Harmonic Current
380/400/415V(line-to-line voltage)
Three-phase three-wire
>0.99
<4%(Voltage distortion lower than 2% at rated load)
+15%~-20%
Rectifier
input
Voltage Range
Lowest operating voltage: -45%
Input Current: <115%In for continuous operation; 115~140%In
for 5 minutes; 140~165%In for 1minute; Current limiting at
current over 165%In(In is the rated output current without
deration)
Input current limiting
50Hz ±10%
frequency range
Input Voltage
380/400/415V(line-to-line voltage)
10%
±
Input Voltage Range
AC Power Input
Frequency range
Bypass input
Three-phase four-wire
50Hz±10%
380/400/415V±1%
Voltage regulation
(balanced load)
( 5% adjustable)
±
5%(0~100%linear load)
Voltage transient response
Transient recovery time
±
<60ms
THD<2%(line-to-neutral voltage)(battery float charge state,
rated balance load)
Voltage distortion(linear load)
Voltage distortion(nonlinear
load)
THD<5%(line-to-neutral voltage)(battery float charge state,
rated balance load)
Output
Power Factor
0.8(lagged)
50Hz±2Hz
Frequency Syn. Range
Frequency regulation(Battery
mode)
0.1%
±
Phase Displacement (Three-
Phase)
120 (balanced load or unbalanced load)
1
± °
Voltage unbalance rate at
100% unbalance load
±2%(battery float charge state)
Frequency slew rate
<1Hz/s
9
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Chapter 1 Introduction
20kVA
Capacity
Model
30kVA
40kVA
60kVA
UL33-0200L UL33-0300L
UL33-0400L
UL33-0600L
105% load 125% , transfer to bypass mode after 10±0.1min;
<
Overload capability(inverter)
125% load 150% , transfer to bypass mode after 1 minute;
<
When load > 150%, transfer to bypass mode after 200ms
135% Rated Current continuously
135%~170% for 1 minute
Overload capability(bypass)
>170%, shutdown in 2s
Output
1000% rated current for 20ms(a standard for selecting static
switch)
Ratio of output current peak
value to RMS value
3: 1
0(uninterrupted transfer) 15ms(interrupted transfer)
，
Transfer time(normal mode)
Transfer time(ECO mode)
System efficiency(linear load)
15ms
System
87%
92%
87%
93%
88%
93%
89%
94%
Efficiency in battery
mode(linear load)
Display
LCD+LED
Conduction
Radiation
EN50091-2
EN50091-2 CLASS-A
IEC1000-3-4
Harmonic
EMC/EMI
EN 61000-4-2.3.4..6.8.9.11 Level III,
Immunity
EN 61000-4-5 Level
30,000 hours
Ⅳ
MTBF(inverter)
MTBF(Single UPS)
150,000 hours
MTBF(1+1 parallel operation
system)
400,000 hours
Safety
CCEE
<60dB
Audible noise at 2m
<65dB
Cross current without
load(1+1)
<3A
<4A
Cross current without
load(3+1)
current unbalance rate(1+1)
current unbalance rate(3+1)
<3%
<4%
10
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Chapter 1 Introduction
20kVA
Capacity
Model
30kVA
40kVA
60kVA
UL33-0200L UL33-0300L
>2M(500VDC)
UL33-0400L
UL33-0600L
Insulation Resistance
(input to earth, output to earth)2820Vdc, leakage current lower
than 3.5mA, 1min without arc
Dielectric Strength
Satisfy the class IV requirements specified by IEC60664-1, the
ability to withstand 1.2/50us+8/20us not lower than 6kV/3kA
Surge Immunity
Protection index
System
IP20
Number of battery cells
30 battery cells(12V)
Installation
Cable access mode
top/bottom cable access modes optional
2. Electrical Parameters
For designing of utility power source, air-conditioner, input and output power
distribution and cable selection, please refer to Table 1-2
Table 1-2 electrical parameters
Model
UPS rated power
AC input
UL33-0200L
20kVA
UL33-0300L
30kVA
UL33-0400L
40kVA
UL33-0600L
60kVA
Rectifier: 380/400/415V+15% (3 3W), Bypass: 380/400/415V 10%(3 4W)
～ ￠
3.60kW
800
±
￠
Rated loss
2.40kW
500
4.37kW
1400
5.94kW
2200
Air intake(m3/hour)
Rectifier input
current
44A
66A
88A
132A
Bypass input current
UPS output current
Battery input current
37A
37A
56A
56A
56A
84A
74A
74A
112A
112A
168A
112A
11
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Chapter 2 Cabinet Installation
Chapter 2 Cabinet Installation
2.1 Environmental Conditions
ꢁ
ꢁ
Operating Temperature : 0~ 40°C
Storage Temperature: -40~ 70°C(with no battery)
-20~ 55°C(with battery)
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
Relative Humidity:5%~95%, no condensation
Cooling method : Fan cooling
Elevation:1500m
Maximum Tilt : 5 degrees
Pollution :Class II
The UPS should be installed in a cool place with good ventilation, low humidity and
free of dust. The recommended operating temperature is 20 – 25 degree C, and
the humidity should be controlled at 50% RH.
ꢀ Note :
The UPS room should not be stored with flammable, corrosive or explosive
materials. It is not advisable to install the UPS in areas with conductive dust.
2.2 Unpacking
Unpack the UPS only at the installation site and check the equipment for
completeness and damage. Keep accessories for later use.
Unpacking method is illustrated on the carton. For reliable operation of the UPS,
the installation method should be based on the actual environment condition and
site design standard.
2.3 Dimensions
The dimensions of the UPS are listed in Table 2-1
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Chapter 2 Cabinet Installation
Figure 2-1
4 fixing holes
4 screws for levelling feet
Figure 2-2
External Dimensions of 40/60kVA UPS are shown in Fig. 2-3 and its installation
position is shown in Fig. 2-4.
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Chapter 2 Cabinet Installation
Figure 2-3 40/60kVA UPS Outline Dimension
4 fixing holes
4 screws for levelling feet
Figure 2-4 40/60kVA UPS Fixing Holes
15
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Chapter 2 Cabinet Installation
2.4 Transportation
1. Hoisting the UPS
Prepare four cables of length 1.5 m and the weight bearing capacity of each cable
of 1.5 tons. The UPS has four lifting rings and should be installed at the top of the
UPS
2. Transportatio with Forklift
The UPS can be raised by forklift in four directions – front, back, left and right. But
the transportation distance should not exceed 10 m.
2.5 Positioning of UPS
The UPS cabinet exerts its weight on the floor through four castors. If the load
bearing capacity of the floor is inadequate, add auxiliary equipment to distribute
the weight over a larger area, such as a big iron sheet or increasing the number of
supporting castor wheels.
ꢀ Note
As the UPS is cooled from the bottom, at least 10 cm space should be left at the
bottom of the UPS for ventilation
There are three kinds of positioning methods:
1. Non-Fixed position
Place the UPS directly on the flat ground . The ground should be made of Industrial
cement. Level the UPS by lowering and adjusting the leveling bolt at the base of
the UPS.
4 M20 screws for
levelling feet
Figure 2-5
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Chapter 2 Cabinet Installation
2. Fixed position without a base
In earthquake prone areas, place UPS on a conduit as shown in Figure 2-6.
1. At the edge of the conduit, drill holes for fixing expansion bolts
2. Hoist the cabinet at least 250 mm to remove the four leveling bolts. Take off
the plastic cover of the installation holes on the beam.
3. Position the cabinet at the right position and align the holes on the beam and
the holes on the expansion bolts.
4. Insert the expansion bolts into the installation holes. Adjust the tilt of the
cabinet and screw the expansion bolts to fix the cabinet.
Front door
Cabinet
Steel of conduit
floor of machine
room
Expansive
bolts
Cables
Cement
floor
Cement
floor
Conduit
Figure 2-6 Install UPS on a Conduit
3. Fixed cabinet position on a base
If the UPS is place in a ESD proof floor, a support rack should be designed to
support the cabinet. The design of the rack is illustrated in Figure 2-4 and Figure 2-
7 considering the load carrying capacity of the floor. Level the cabinet according to
section 2.5 – 1
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Chapter 2 Cabinet Installation
Figure 2-7 Install the UPS on a support rack
1. Finished state
2. Concrete floor
4. Spring washer
6. Supporting frame
3. Nut
5. Flat washer
2.6 Cable Access
The UPS has various methods of cable access. One is bottom access where the
cables are routed in conduit from the bottom of the UPS. This is shown in Figure 2-
8.
Another is top access where the cables are routed on cable trays from the top and
into the UPS as shown in Figures 2-9.
Cabinet
Cabinet
Signal cables
Battery
cables
Bypass input
input N
Signal cables
Battery
cables
UPS output
output N
input N
UPS output
output N
Rectifier
input
Fig. 2-8 UPS input/output cables
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Chapter 2 Cabinet Installation
Input cable
Battery cable
Output cable
Signal cable
Fig. 2-9 UPS top cable output
2.7 Ventilation
The cooling air comes into the UPS from the bottom and the fan circulates the cool
air inside the UPS. The air is expelled out of the UPS from the back.
Table 2-3 shows the relationship between the power consumed and air intake.
The rear clearance required by the UPS is 500 mm. The front clearance required is
1 m for the convenient of door opening and maintenance, shown in Figure 2-10.
Battery cabinet
UPS cabinet
bottom board
Fig. 2-10 Relative position of cabinet
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Chapter 2 Cabinet Installation
2.8 Layout of Cabinet
Besides the UPS cabinet, there are also battery cabinets, input/output distribution
cabinet and cabinet for bypass transformer. All these cabinets should be laid out
correctly. The layout of battery cabinet and UPS cabinet is shown below.
1. One UPS cabinet and one battery cabinet
If the required battery backup time is 15 – 16 minutes, one battery cabinet is
required to hold all the required batteries. There is no strict requirement for the
relative position of the UPS and the battery cabinet. Figure 2-11 shows this kind of
layout.
Capacity expansion must be considered into layout design.
Battery cabinet
UPS cabinet
Fig. 2-11 Layout 1
2. One UPS cabinet and several battery cabinets
More than one UPS cabinet should be used if the required backup time is more
than 30 minutes. Please refer to Chapter 9 for the relationship between the battery
backup time and the battery capacity.
The battery cabinets should be placed side-by-side and the UPS cabinet can be
placed on the left or right side, in front of or behind the battery cabinets. Be sure to
leave space for maintenance.
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Chapter 2 Cabinet Installation
Battery cabinet 1
Battery cabinet 2
UPS cabinet
Fig. 2-12 Layout 2
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Chapter 3 Electrical Assembly
Chapter 3 Electrical Assembly
This chapter introduces the connection methods of the power and signal cables.
3.1 Selection of cables
3.1.1 Current carrying capacity of cables
The current carrying capacity can be selected according to the voltage drop and
permissible temperature increase.
Table 3-1 Current carrying capacity of cables
Cross sectional area(mm2)
Current
carrying
1
1.5 2.5
4
6
10
85
16
110 145 180 230 285 345 400 470 540 660
105 138 170 215 265 325
103 136 168 215 267 323 374 439 505 617
96 129 159 201 248 304
25
35
50
70
95 120 150 185 240
capacity (A)
Rubber
21
27
35
32
33
30
45
58
°
25 C
Plastic
Rubber
Plastic
19
20
18
24
25
22
42
42
39
55
54
51
75
80
70
/
/
/
/
°
35 C
/
/
/
/
3.1.2 Selection of power cables
The power cables include input power cables of main circuit and that of the bypass,
the UPS output cables, battery input cables, protective earth cables and the
lightning protection cables.
1. Calculation of current of power cables
The first calculation method is done according to the following formula:
If the power factor is 0.80, the efficiency is 0.9, the minimum input voltage is 176
volts, output line to neutral voltage is 220V, minimum battery voltage is 324 V,
bypass overload capability is 135% and that of the inverter is 125%,
2. Selection of cable cross sectional areas
Power cables are selected according to two factors - 3 – 5 A/mm2 current density
and the maximum voltage drop be less than 3 W.
The cross-sectional areas of bypass input neutral cable and UPS output neutral
cable should be 1.5 times of the phase cable. The cross sectional area of the
23
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Chapter 3 Electrical Assemble
protective earth cable and lightning protection earth cable, should be 0.5 times of
phase cable.
The relationship between the current and cross-sectional area is shown in Table 3-
2.
Table3-2 Recommended cross sectional area of cables
20kVA
Current
30kVA
Current
40kVA
Current
60kVA
Current
Name
Cable
(mm2)
25
Cable
(mm2)
25
Cable
(mm2)
35
Cable
(mm2)
50
(A)
56
37
37
44
(A)
84
56
56
66
(A)
112
74
(A)
168
112
112
132
Battery
Bypass
16
16
25
35
Output
16
16
74
25
35
Input
16
16
88
25
35
Neutral line
Earth cable
25
25
35
50
16
16
25
25
3.1.3 Selection of signal cables
Signal cables should use shielded multi-conductor cables. But if cable with single
conductor is used, the different cables should be bonded together to increase the
mechanical strength. The number of the bonded cables should not exceed 30. The
cross-sectional area of the cable with single conductor should be at least 0.5 sq-
mm. Serial communication cables should use 3 or 5 shielded conductor cables.
3.2 Cable connections
3.2.1 Power cables
1. Cabling layout
Cabling layout is shown in Figures 3-1 and 3-2. For single input UPS, the rectifier
input and bypass input are connected together.
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Chapter 3 Electrical Assembly
Battery
cables
UPS input UPS output
input N output N
Fig. 3-1 20/30kVA UPS bottom cable output
Battery cables
Bypass input
Bypass N
Rectifier input
UPS output
Output N
Fig. 3-2 40/60kVA UPS cable connection at bottom
2. Cable routing
1. Bottom entry configuration – the cables are input and output from the bottom of
the UPS
2. Top entry configuration – the cables are input and output from the top of the
UPS. To do this, punch out the cable entry cut-outs on the top of the UPS,
and feed the cables through the cutouts and guide them through the metal
conduit to the bottom of the UPS. From the front view, the battery cable, the
input power cables of rectifier and bypass input cables should be input from
the left. The output cable and signal cables should be input from the right.
The layout of the cables is shown in Figure 2-8.
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Chapter 3 Electrical Assemble
3. Cable connection
ꢀ Note
All the switches should be switched off during cable connection.
1. Feed cables
Feed cables according to the cable entry mode, with reference to Figures 2-7, 2-8,
3-1, 3-2
2. Assembling cable lugs to cables
First strip the insulation layer 20 mm from the end. Then insert the conductor into
the cable lug. Then press the cable lug against the cable till tight.
The parameters of the cable lugs are given in Table 3-3
20kVA
30kVA
40kVA
60kVA
Name
Battery
Cable
(mm2)
Cable
(mm2)
Cable
(mm2)
Cable
(mm2)
terminal
terminal
terminal
terminal
GTNR25-8
GTNR25-8
GTNR50-8
GTNR50-8
25
25
35
50
Bypass
Output
Input
H16/24
H16/24
H16/24
H16/24
H16/24
H16/24
H35/30
H35/30
H35/30
H35/30
H35/30
H35/30
16
16
16
16
16
16
25
25
25
35
35
35
Neutral
line
GTNR25-8
GTNR25-8
GTNR25-8
GTNR25-8
GTNR50-8
GTNR25-8
GTNR50-8
GTNR25-8
25
16
25
16
35
25
50
25
Earth
cable
3. Connecting the rectifier input to utility
Connect the three phase cables of phase A1, B1 and C1 to the circuit breaker Q1
4.Connecting the bypass input to utility
Connect the three phase cables of phase A2, B2 and C2 to the circuit breaker Q2.
ꢀ Note :
In single input system, jumper the respective terminals on Q1 to Q2 with a 300mm
length cable. The utility will be connected to Q1 as described in 3.
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Chapter 3 Electrical Assembly
Wire terminal
Input power cable
Parallel power cable
Fig. 3-3 Power cable connection of One branch utility source
5. Connect the Load to the U, V, W terminals of UPS output breaker Q5.
6.Connection of battery cables
The positive and negative cables of batteries are connected to the Positive and
Negative terminals of JX3 respectively.
7. Connection of Neutral cable
The neutral cable of bypass source is connected to the JX5 copper bar, that is
marked with “N/INPUT”. The neutral cable of UPS output source is connected to
copper bar JX4, that is marked with “N/OUTPUT”.
ꢀ Note
The phase rotation of circuit breakers Q1, Q2, Q5 cannot be wrong and the phase
rotation is shown in Figure 3-4.
A
R
U
B
S
V
C
T
W
A
R
U
B
S
V
C
T
W
A
R
U
B
S
V
C
T
W
L1 L2 L3
L1 L2 L3
L1 L2 L3
Q1
Q2
Q5
A
R
U
B
S
V
C
T
W
A
R
U
B
S
V
C
T
W
A
R
U
B
S
V
C
T
W
L1 L2 L3
L1 L2 L3
L1 L2 L3
Fig. 3-4 Phase rotation
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Chapter 3 Electrical Assemble
4. Earthing Method
The UPS rectifier source has no neutral cable. The bypass and output source have
neutral cables and the input and output neutral cables are short circuited.
The lightning protection earth PE and the protection earth of the cabinet are
connected as shown in Figure 3-5. The user can decide whether to use a
connection cable according to his earthing requirement.
PE for lightning protection
PE inside cabinet
Protective earth
Fig. 3-5 Wiring inside cabinet
Generally, the separated neutral mode is better for human safety. The united
connection mode is better for the UPS system.
If there is C-level lightning
protection unit inside the UPS, the cabinet protection earth and the lightning
protection earth should be connected together.
In the bottom cable entry mode, the protection earth cable should be connected
with a copper terminal on the beam inside the cabinet or connected to the copper
busbar marked with PE. User board M8x12 to fix the cable.
ꢀ Note
The leakage current of the UPS should be less than 1 ampere.
The earthing resistance of the UPS cabinet should be less than 1 ohm.
3.2.2 Signal cable
The Signal cable includes serial communication cables, control cables of
input/output contacts, logic and load sharing cables.
1. Routing the signal cable
The signal cables should be routed according to Figure 3-6
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Chapter 3 Electrical Assembly
Fig. 3-6 Layout of signal cables of 20/30/40/60kVA UPS
2. Connection method
1.Parallel connection method
Open the door of the UPS to see a circuit board ULW2L61M3. On the board, 15-
pin connectors P1 and P2 are used to connect the parallel logic cables. 9-pin
connectors P3 and P4 are used for connecting the load sharing cables. Each UPS
system has two pieces of 15 meters length cables.
Parallel load sharing cable
Parallel logic cable
Fig. 3-7 Parallel Board ULW2L61M3
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Chapter 3 Electrical Assemble
2.Connection of serial connection cables
The monitoring board ULW2L61U2 is shown in Figure 3-8, where the locations of
RS232, RS485 and input and output contacts are marked. The user can connect
the cables with reference to this board.
communication cable RS485-
communication cable RS485+
Fig. 3-8 Monitoring Board ULW2L61U2
The length of the serial communication cables is different according to actual
conditions. The cables are not supplied with the UPS.
The communication modes of RS232, RS485, modem and SNMP can be used
together, but only one mode can be used at any time.
1) RS232 Connection
The J20 is the RS232 communication port. One end of the communication cables
should be connected to J20 and the other end should be connected to background
monitoring equipment. The meaning of each pin is shown in Figure 3-9.
Pin 2：receiving
Pin 3：Transmitting
Pin 5：Ground Other pins：Void
Fig. 3-9 RS232 Serial Port
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Chapter 3 Electrical Assembly
2) Connection of modem
MODEM or SNMP
SNMP cables
Monitoring board
SNMP cables
Monitoring board
MODEM or SNMP
40/60kVA Front view when
right door is opened
20/30kVA Front view when
Front door is opened
Fig. 3-10 Installation of MODEM or SNMP
1. Figure 3-10 shows the location of Modem and SNMP card. Before installing the
modem, the user should remove the iron box use for SNMP card and installed the
modem there.
communication port
communication port
serial pore
Power source
Communication port
Fig. 3-11 MODEM Connection Method
2.Connecting the communication cables. The communication cables of modem are
connected to J20.
3. Connection of power source cables. Connect the power source cables of modem
directly to J8. The Pin 1 of J8 is ground. Pin 2 is 12V power.
4.Connection of Telephone line. Connect the telephone line after connecting the
power source and communication cables to realize remote communication.
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Chapter 3 Electrical Assemble
3）Connection of SNMP Card
Installation of SNMP card
Unpack the SNMP card and place it in the iron case shown in Figure 3-10
Connect the cables
On the monitoring board, there is a jack J22 with a cable to plug in directly to the
SNMP card, after the SNMP Card is installed. Please do not remove this cable
even if the SNMP card is not used.
4）Connection of RS485
Connector J23 on the monitoring board is the RS485 communication port. One
end of the communication cable is connected to J23 while the other end is
connected to the user’s equipment.
J23
RS485+
RS485-
1
2
3
SHIELD
4
Pin 1:Signal +
Pin 2:Signal
Pin 4:Shielded ground
Fig. 3-12 RS485 Port
3. Connection of input and output voltage free contacts
The input and output contacts can be connected to shielded cables, and single
cables. One end of the cables are connected to J9 to J18. The other end is for
connection by user.
ꢀ Note:
The contact should satisfy the SELV safety requirements.
The J9-J14 connectors on the monitoring board are monitoring dry contacts of
relays. The relays have a normally open, normally closed and a common terminal.
The capacity of the contacts are 0.3A/125VAC, 0.3A/110VDC and 1A/24DC.
The transmission distance of the dry contact signals are dependent on the voltage
level and the cross sectional area of the cables. J15 – J18 are the input contacts
for external signals.
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Chapter 3 Electrical Assembly
Table 3-4 Definitions of input/output contacts
Connector
Name of contacts
Board name
BLV-C
input/output
Normally closed contacts for
battery low alarm
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
output
Central contacts for battery low
alarm
BLV-S
BLV-O
BAT-C
BAT-S
BAT-O
INV-C
Normally open contacts for
battery low alarm
Normally closed contacts for
battery mode
Central contacts for battery
mode
Normally open contacts for
battery mode
J9
J10
J11
Normally closed contacts for
inverter mode
Central contacts for inverter
mode
INV-S
Normally open contacts for
inverter mode
INV-O
Normally closed contacts for
ambient over-temperature
TMP-C
TMP-S
TMP-O
URG-C
URG-S
URG-O
WRN-C
WRN-S
WRN-O
OVR-C
Central contacts for ambient
over-temperature
Normally open contacts for
ambient over-temperature
Normally closed contacts for
emergency shutdown
Central contacts for emergency
shutdown
Normally open contacts for
emergency shutdown
J12
J13
J14
Normally closed contacts for
common alarm
Central contacts for common
alarm
Normally open contacts for
common alarm
Normally closed contacts for
overload
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Chapter 3 Electrical Assemble
Connector
Name of contacts
Board name
input/output
output
Central contacts for overload
OVR-S
Normally open contacts for
overload
OVR-O
output
output
J12
J13
J14
Normally closed contacts for
generator mode
GEN-C
GEN-S
GEN-O
+24V
Central contacts for generator
mode
output
Normally open contacts for
generator mode
output
+24V power for environmental
signal
power output
24V power for environmental
signal 1
connect to dry
contacts
ENV1
ENV2
ENV3
+12V
J17
24V power for environmental
signal 2
connect to dry
contacts
24V power for environmental
signal 3
connect to dry
contacts
+12V power for environmental
signal
power output
connect to dry
contacts
12V environmental signal
NC
ENV
NC
J16
Ambient temperature input
Dry contacts H of generator
V-AD
0~5V signal input
GEN-H
connect to dry contacts
connect to dry
contacts
Dry contacts L of generator
Emergency shutdown H
GEN-L
J18
connect to dry
contacts
UCTRH
connect to dry
contacts
Emergency shutdown L
NC
UCTRL
NC
12V
Power Source of Sensor
Battery Temperature
GND of Sensor
＋
power output
0~5V signal input
power output
J15
BAT-T
GND
Terminals J9~J14 are the dry contacts for monitoring that can be used by users.
The relays have central contacts.
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Chapter 3 Electrical Assembly
4. Battery Temperature detection cable
When the user select the temperature compensation technology, he should select
the TMP12Z sensor that is installed inside the battery cabinet or battery room. Use
a cable to send a temperature signal to J15 on the monitoring board. Shield cable
is recommended to be used because the transmission distance is long.
The location of the temperature sensor is shown o Figure 3-13.
Fig. 3-13 Dry Contact
1. Circuit Breaker QF1
2. Temperature Sensor TMP12Z
Fig. 3-13 Installation of TMP12Z
3.3 Connection of Single UPS System
The circuit breaker of bypass source is selected according to its disconnecting
capacity and short circuit current. The selected circuit breaker should be able to
protect the static switch according to its maximum permissible current.
35
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Chapter 4 Commissioning of UPS
Chapter 4 Commissioning of UPS
4.1 Startup Procedure
4.1.1 Explanation of Circuit Breakers
From the layout of Figure 1-3 and Figure 1-4, the startup of UPS has connections
with the following circuit breakers
Q1 : Connects rectifier to Utility source
Q2 : Connects bypass to Utility source
Q5 : Connects UPS output to the Load
Q3BP : Connects bypass input source to the load switch
QF1 : Battery Circuit Breaker
4.1.2 Startup
All the circuit breakers of the UPS should be switched off and phase rotation correct.
The battery cables are connected correctly. Q1 and Q2 are connected to utility.
ꢀ Note
Before startup, do not connect the load
The UPS should be started up according to the following procedures:
Step 1 : Switch on Q2 and Q5. The power source indicator on the panel turns on
and the LCD displays information during startup.
Step 2 : Switch on Q1 and QF1. The sound of the relay closing should be heard.
After 2 secs, the main contactor closes. The rectifier starts after the soft start relay
opens. The rectifier indicator flashes several times and the rectifier enters normal
operation states after about 10 secs.
Step 3 : The battery input contactor closes automatically after the DC bus reaches
the pre-set value. The battery indicator illuminates before the battery contactor
closes and it turns off after the contactor closes.
Step 4 : Press the button “inverter start” for two seconds. The inverter will start up
and enters normal operating state when the inverter indicator flash.
37
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Chapter 4 Commissioning of UPS
Step 5 : After the UPS transfers from bypass to inverter, the bypass indicator turns
off, and the inverter and the load indicator turns on. The transfer may fail if the
phase rotation of bypass and inverter output are different.
During operation, if the AC power recovers after failure, the rectifier will restart
automatically after some time. If the UPS transfer to generator power, the
monitoring system will determine the quality of the generator supply. The time it
takes to determine this, ranges from 1 second to 255 seconds.
After startup, use the keypad to set the functions of the UPS.
ꢀ Note
Power failure means the line to neutral voltage is lower than 120V or the Line to
Line voltage is lower than 208V over 10 msecs.
4.2 Setting the functions
The methods of setting the functions will be described in details in Chapter 5.
This chapter only introduces the setting that relates to commissioning.
The user enters the menu of “set functions” shown in the figure below.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
Chinese
English
Out
Local
System
Battery
Records
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -08
12:50:30
Settings
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
Battery low
Fig. 4-1 Function Setup Menu
Language selection : select “Chinese” or “English” as shown in Figure 4-3
Address setup : set the address of this UPS in the monitoring system as shown in
Figure 4-3.
Date and Time setup : format is “YYYY-MM-DD” and “HH:MM:SS” as shown in
Figure 4-3
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Chapter 4 Commissioning of UPS
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
System
Battery
Records
Settings
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 4-2 Setup Language
Manual Battery Self Test : Select “start self test” or “stop self test”
Contrast Adjustment : Change the display contrast according to the 11 bars, as
shown in Figure 4-4.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Manual Batt Test
Out
Local
Start
Stop
Display contrast adjust
System
Battery
Records
Settings
3 days
Record Query Range
0: all records
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 4-4 Manual Battery Self-test
History Record : The set range is 1-30 days. If “0” is set, all records will be
available for viewing.
Background Communication Setup : select between modem and RS232, as shown
in Figure 4-5
Baud Rate setup : Select from available baud rates of 9600, 4800, 2400 or 1200,
as shown in Figure 4-5
Callback time setup : the available set range is from 1-5 times, as shown in Figure
4-5
39
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Chapter 4 Commissioning of UPS
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Comm. Mode Set RS232
MODEM RS232
Out
Local
Comm. Baudrate Set 9600
System
Battery
Records
Settings
4800
9600
2400
1200
Callback Times Set 3
3
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 4-5 Background Communication
Callback number 1 : the first callback number can be a mobile phone number, a
fixed line phone number, a beeping pager or an extension telephone. The length of
the telephone number is 15 digits. Input the number from the first digit and any
remaining blanks digits has to be entered with an asterisk “*”
Callback number 2 : same as for callback number 1
Callback number 3 : same as for callback number 1
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Comm. Mode Set RS232
MODEM RS232
Out
Local
Comm. Baudrate Set 9600
System
Battery
Records
Settings
4800
9600
2400
1200
Callback Times Set 3
3
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 4-6 Fault Call-back
4.3 Functional checks
Check the functions of switching between operation modes, visual and audible
alarms and the display functions.
40
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Chapter 4 Commissioning of UPS
4.3.1 Check the function of the display panel
Press the button “inverter shutdown” for 2 seconds and check that the inverter
stops.
Rectifier
indicator
Inverter
indicator
Bypass
indicator
Battery
indicator
Load
indicator
Alarm
indicator
Emergency
shutdown
UL33-0400L
2001-11-08
12:50:30
Inv. On
Units 2/4
ID: 1
Alarm
Language
Chinese
Out
Ö
Local
English
Chinese
F1
F2
Å
System
Com. Adress Set
1
1
½
Battery
±
Records
Inverter
stare
Inverter
stop
Date & Time Set
²
Settings
2001£ -11£-08
12:50:30
µ
11£ -08 12:09
Input Breaker Closed
F3
F4
Ê
11£ -08 12:09
Byp. Breaker Closed
11£ -08 12:28
Mains Volt. Abnormal
m
Ê
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:50
Ö
Battery low
Fault
clearing
11£ -08 12:12
µ ç³ Ø¾ù³ ä
Mute
Fig. 4-7 Display Panel
Press the button “Emergency shutdown” and check that the UPS shuts down
Press the button “fault clear” to restart the UPS
Simulate a fault to check the visual and audible alarm functions.
Press “Mute” button to silence the alarm
4.3.2 Switching between operation mode
t
Fig. 4-8 UPS Circuit Breaker Operation
41
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Chapter 4 Commissioning of UPS
1. Switch from normal mode to battery mode. Switch off Q1 to enter battery mode
and after a few seconds, switch on Q1 again to return to normal mode
2. Press “inverter shutdown” button to switch to bypass mode. After a short while,
start inverter again to return to normal mode.
3. In bypass mode, switch on Q1 and press “inverter start” button after the rectifier
starts. The UPS should switch to normal mode.
4. Switch from normal mode to maintenance bypass mode. Press “inverter
shutdown” button, switch off Q1, switch on Q3BP, switch off Q2, Q5, QF1. At this
time the bypass source will power the load through Q3BP.
5. Check that the generator set and the UPS battery can work together.
6. A parallel system can also switch between different operation mode.
42
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Chapter 5 Operation of Display Panel
Chapter 5 Operation of Display Panel
5.1 Display panel
5.1.1 Layout of Display Panel
The display panel of the UPS is shown in Figure 5-1.
Start
Shutdown
Faullt clear
Mute
1:LCD
2:Rectifier indicator
3:Battery operation indicator
5:Inverter operation indicator
7:Buzzer
4:Bypass source indicator
6:UPS output indicator
8:Alarm indicator
9: cover used for preventing wrong operation of Emergency shutdown button
10:Emergency shutdown button (EPO)
12:Inverter shutdown button
14:Alarm mute button
11:Inverter start button
13:Fault clear button
15:F1 Functional key
16:F2 Functional key
17:F3 Functional key
18:F4 Functional key
Fig. 5-1 Display Panel
The display panel is divided into three sections:
1.LED section
2.Functional Keys
3.LCD
43
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Chapter 5 Operation of Display Panel
Rectifier
indicator
Inverter
indicator
Bypass
indicator
Battery
indicator
Load
indicator
Alarm
indicator
Emergency
shutdown
UL33-0400L
2001-11-08
12:50:30
U
Inv. On
Units 2/4
ID: 1
Alarm
Language
Chinese
Out
Ö
Local
English
Chinese
F1
F2
Å
System
Com. Adress Set
1
1
½
Battery
±
Records
Inverter
stop
Inverter
stare
Date & Time Set
²
Settings
2001£ -11£-08
12:50:30
µ
11£ -08 12:09
Input Breaker Closed
F3
F4
Ê
11£ -08 12:09
Byp. Breaker Closed
11£ -08 12:28
Mains Volt. Abnormal
m
Ê
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:50
Ö
Battery low
Fault
clearing
11£ -08 12:12
µ ç³ Ø¾ù³ ä
Mute
Fig. 5-2 Function Dividing
5.1.2 LED Indication
There are six LEDs to indicate the operation state and fault.
Yellow – Normal
Red – Fault condition
Bypass LED
Yellow – Load on Bypass power
Red – Bypass Voltage out of normal range
Off – Bypass Normal
Rectifier LED
Yellow – Load on Rectifier
Flashing Yellow – Utility Normal, but rectifier not operating
Red – Rectifier fault
Off – Utility abnormal
Battery LED
Green – Battery powers the load
44
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Chapter 5 Operation of Display Panel
Flashing Green – End of battery discharge
Red – Battery Abnormal (overtemp, low battery, contactor fused)
Off – Battery Normal but not in operation
Inverter LED
Green – Inverter powers the load normally
Flashing Green - Inverter standby
Red – Inverter Fails
Off – Inverter Normal but not in operation
Load LED
Green – UPS output on
Red – UPS shuts down due to overload
Orange – UPS overload
Alarm LED: If the red LED turns on, that means the system itself has fault; If green
LED turns on, that means there is no alarm; If orange color(actually red and green
illuminate together) means there is a fault in the environment of the system, such
as rectifier input abnormal, bypass voltage abnormal and battery disconnected.
5.1.3 Functional Keys
There are five buttons.
Emergency shutdown – Use to totally shut down the UPS including the rectifier, the
inverter and the battery
Inverter Start-Use to start the inverter, but if the inverter is not ready, pressing this
key will have no use
Inverter Stop-use to shut down the Inverter during operation,
Fault clear – If the UPS shuts down due to a fault, press this key to restart the UPS
after the fault is cleared
Mute-Use to silence the alarm and re-pressing the button will sound the buzzer
again. Any new fault will sound the buzzer again.
Pressing any one of the above keys, a short click can be heard.
ꢀ Note
To ensure any of the button is properly activated, press down the key for about 2
seconds
45
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Chapter 5 Operation of Display Panel
5.1.4 Alarm Buzzer
If there is no alarm sound, it means that either the alarm is muted or the system is
not in a fault condition
There are three types of sound from the buzzer
1.Single click - The sound can be heard when any button is pressed
2. 1 sec click with a 2 secs interval - when system has common fault or alarm
3. Continuous alarm – when system has serious faults
Press Mute button to silence alarm.
5.1.5 LCD and Menu Keys
There are four menu keys
1. Menu key
Each key has two functions, and the functions are defined in the following table
Key
F1
F2
Up
left
F3
F4
OK
Function 1
Shift
Down
Right
ter
En
m
C
Exit
Function 1
Modify
Fig. 5-3 Icons of functional keys and the meanings
2. LCD
The LCD can display alarm information in real time. 220 historical events can be
stored and retrieved.
46
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Chapter 5 Operation of Display Panel
UPS information
window
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Menu Display
Window
A(B) B(C) C(A)
Mains
Vphase
220 221
12.3 12.5
221
11.8
Bypass
Output
Local
System
Battery
Measuring and
setup window
Iphase A
Freq.Hz
P.F.
50.2
0.99
50.1
0.99
50.1
0.99
Kaypad Window
381 380 382
Vline V
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Current event
window
Output Breaker Open11£ -08 12:09
UPS in Normal Mode11£ -08 12:09
11£ -08 12:09
Batt. Boost Charging
Fig. 5-4 Sections of the LCD
The LCD are divided into five windows :
ꢂ
ꢂ
ꢂ
ꢂ
ꢂ
UPS information window (restricted for factory use)
Keypad window (restricted for factory use)
Menu display window
Current event window
Alarm window
Pressing the F1 key can scroll through the windows that can be operated by user.
UPS information window-This window displays the UPS basic information and is
not necessary for the user to operate. The displayed information is given in the
following table.
Menu display window-This window displays the information of measuring and setup
sub-windows. There are 6 menus, but actually 8. The user can select the menu by
pressing F2 or F3. These 8 menus are: rectifier input, bypass input, AC output, load,
parallel load, battery data, history record and function setup
Keypad Window – The display window shows the picture of the keys and near the
pictures of the keys, the operations can be done by the user are displayed.
Measuring and Setup window – select the module which you want to query and the
parameters will be displayed in this window
Current event and alarm window – displays detailed current event and alarms of
UPS
47
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Chapter 5 Operation of Display Panel
5.2 The displayed information
5.2.1 Opening display
At power up of the UPS, the opening display is shown in Figure 5-5.
Fig. 5-5 Opening Display
5.2.2 Main Menu Display
After the UPS is power up and self test is completed, the main menu will be
displayed, as shown in Figure 5-6. Use the arrow-up and arrow-down key to scroll
the menu and the history log.
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
B(C) C(A)
220 221
12.3 12.5
A(B)
221
11.8
50.2
Bypass
Out
Local
System
Battery
Records
Power KW
Cap. KVA
Load%
50.1
1.41
50.1
1.40
Crestor 1.41
Factor
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-6 Main Menu
5.2.3 UPS Basic Information
The current basic UPS information will be displayed by pressing the F1 and F4
keys together.
48
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Chapter 5 Operation of Display Panel
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*------------------------------------------------------------------*
*----------------Emerson Network Power-----------------*
*------------------------------------------------------------------*
* UPS version£ º
* UPS model£ º
* UPS type£ º
1.00
*
*
*
*
itrust0400L
Single normal
NO.3
-
* UPS ID£ º
* Rectifier version£ º
* Inverter version£ º
* Monitor version £ º
* Record start time£ º
1.00
1.00
1.00
*
*
*
05-11-02 12: 23: 12 *
*----------------Press any key to continue----------------*
*------------------------------------------------------------------*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Fig. 5-7 Display Menu
5.2.4 Menu Keys Display Window
The window is displayed in Figure 5-6. Use the arrow-up and arrow-down keys to
select from the menu and the measured information will be displayed.
For example, if the user the first menu (main rectifier input) then the measuring
window will display the input line-line voltage and the current.
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
A(B) B(C) C(A)
221 220 221
Mains
Vphase
Bypass
Output
Local
System
Battery
12.3 12.5
11.8
50.2
0.99
Iphase A
Freq.Hz
P.F.
50.1
0.99
50.1
0.99
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open
UPS in Normal Mode
Batt. Boost Charging
11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
Fig. 5-8 Press Up(F2) or Down (F3) to Move the Cursor
Scroll Up and down the window by pressing the F1 key.
If the selected menu is not a historical record, then pressing F1 will display current
events and alarms.
49
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Chapter 5 Operation of Display Panel
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
A(B) B(C) C(A)
Mains
Vphase
220 221
12.3 12.5
221
11.8
Bypass
Output
Local
System
Battery
Iphase A
Freq.Hz
P.F.
50.2
0.99
50.1
0.99
50.1
0.99
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-9 Shift key(F1) display
If the window displays the current events or current alarms, pressing F2 and F3 can
display events and alarms of other modules.
5.2.5 Information of main menu
Eight main menu will be displayed on the LCD. They are
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
Rectifier input
Bypass input
AC output
Load of single module UPS system
Parallel load
Battery data
History Log
Function setup
Pressing F1 can switch from present window to measuring sub-window.
Rectifier Input – displays three phase line-line voltage, line current, frequency and
power factor of rectifier, as shown in Figure 5-8
Bypass Input - displays three phase line-line voltage, line current, frequency and
power factor of bypass source, as shown in Figure 5-10
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
B(C) C(A)
221 220 221
A(B)
Mains
Vphase
Bypass
Output
Local
System
Battery
50.1
382
Freq.Hz
Vline V
50.1
380
50.2
381
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-10 Bypass input display LCD
50
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Chapter 5 Operation of Display Panel
AC Output - displays three phase line-neutral voltage, line current, frequency,
power factor and line-line voltage, as shown in Figure 5-11
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
B(C) C(A)
220 221
12.3 12.5
A(B)
221
11.8
50.2
0.99
Mains
Bypass
Output
Local
System
Battery
Vphase
Iphase A
Freq.Hz
P.F.
50.1
0.99
50.1
0.99
381 380 382
Vline V
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-11 AC output display LCD
Parallel load - Displays the power and capacity of parallel load as shown in Figure
5-12
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
A(B) B(C) C(A)
Mains
kWout
kVAout
20.3 20.8
21.7 22.2
21.2
22.3
Bypass
Output
Local
System
Battery
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-12 Parallel Load Display LCD
Battery Data - Displays battery information under different conditions, such as
Battery not connected, equalization charge, float charge, discharge and pre-alarm
upon discharge.
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Mains
Battery Disconnected
Bypass
Output
Local
System
Battery
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
Batt. Disconnnected
UPS in Normal Mode
11£ -08 12:09
11£ -08 12:09
Fig. 5-13 Displaying contents when the battery are not connected
51
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Chapter 5 Operation of Display Panel
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Mains
Bypass
Output
Local
System
Battery
Batt. Volt
Batt. Curr.
Batt. Temp. C 23.2
Batt. Boost Charging
V
A
423
4.56
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-14 Displaying LCD at equalization charging state
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Mains
Bypass
Output
Local
System
Battery
Batt. Volt
Batt. Curr.
Batt. Temp. C 23.2
Batt. Float Charging
V
A
423
4.56
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Float Charging
Fig. 5-15 Displaying LCD at float charging state
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Mains
Bypass
Output
Local
System
Battery
Batt. Volt
Batt. Curr.
Batt. Temp.
V
A
C
423
4.56
23.2
Backup Time Min 56
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open
11£ -08 12:09
11£ -08 12:25
11£ -08 12:25
Mains Volt. Abnormal
UPS in Battery Mode
Fig. 5-16 Displaying LCD at discharging state
52
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Chapter 5 Operation of Display Panel
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Mains
Batt. Volt
Batt. Curr.
Batt. Temp. C 23.2
Backup Time Sec 176
V 423
A 4.56
Bypass
Output
Local
System
Battery
11£ -08 12:09
11£ -08 12:09
11£ -08 12:25
11£ -08 12:25
11£ -08 12:50
Input Breaker Close
Byp. Breaker Close
Mains Volt. Abnormal
UPS in Battery Mode
Battery Low
Fig. 5-17 Pre-alarm when battery discharges to end of discharge voltage
History Log – According to the prompt information in keypad window, pressing F3
key(“Down” key) to display interface of “History Log” as shown in Figure 5-18.
UL33-0400L
Inv. On
2001-11-08
Units:
12:30:20
ID 1
Byp. Out of Syn.
Bypass
Output
Local
2001£ -11£ -08
2001£ -11£ -08
12:08:30
12:08:58
UPS in Bypass Mode
2001£ -11£ -08
2001£ -11£ -08
12:09:58
12:20:30
System
Battery
UPS in Normal Mode
2001£ -11£ -08
2001£ -11£ -08
12:20:30
12:28:48
Records
11£ -08 12:09
11£ -08 12:09
11£ -08 12:25
11£ -08 12:25
11£ -08 12:50
Input Breaker Close
Byp. Breaker Close
Mains Volt. Abnormal
UPS in Battery Mode
Battery Low
Fig. 5-18 History log
Function setup - Pressing F3 key(“Down” key) to display the last interface of
“Function setup” as shown in Figure 5-19
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Chinese
English
Language
Out
Local
Chinese
System
Battery
Records
Settings
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
Battery low
Fig. 5-19 Functional setup
53
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Chapter 5 Operation of Display Panel
5.3 Function Setup
In the Menu Display Window select “Function Setup”, pressing F1 key to switch the
present window to Measuring and Setup Window and modify each settable items.
Pressing F3 key can scroll through all the settable items (total number of the
settable items is 12). Pressing F4 to modify and confirm the set parameters.
If need no setup, press F1 to exit the current window.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
System
Battery
Records
Settings
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-20 Function setup
5.3.1 Language setup
According to the information displayed on the Menu Display Window, pressing F4
to enter the Language setting menu, use F2 and F3 keys to select the language,
and then pressing F4 to confirm and exit the Language Setting Menu. If you do not
want to modify the language, pressing F1(ESC) to escape.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-21 Setup the language
54
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Chapter 5 Operation of Display Panel
5.3.2 Address setup
According to the information displayed on Fig.5-22, select the “Equipment Address
Setup” and pressing F3(UP) or F2(DOWN) to modify the address of the equipment,
and then pressing F4 to confirm and exit. If you do not want to modify the language,
pressing F1(ESC) to escape.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-22 Equipment address
5.3.3 Time setup
According to the information displayed on the Fig.5-23, select the “Time Setup” to
modify the system time. If you do not want to modify the language, pressing
F1(ESC) to escape.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-23 Setup the date
Suppose the time is 2001-11-09 12:50:20, pressing F2 (move left) and F3 (move
right) keys to move the cursor to the location of date, as shown in Fig. 5-24.
55
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Chapter 5 Operation of Display Panel
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-24 Setup the date 1
Pressing F4 to let the date to be able to be modified, as shown in Fig. 5-25.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -08
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-25 Setup the date 2
Pressing F2(up) to change the date to 09, then press F4(Enter) to confirm and exit,
as shown in Fig. 5-26. If you do not want to modify the date, pressing F1(ESC) to
escape.
UL33-0400L
Inv. On
2001-11-08
Units 2/4
12:50:30
ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
1
Date & Time Set
2001£ -11£ -09
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-26 Setup the date 3
56
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Chapter 5 Operation of Display Panel
After escaping the modification state, the date displayed by the UPS basic
information window has become a new date. Then use F2 (move left) and F3
(move right) keys to move the cursor to the location of “second”, as shown in Fig. 5-
27.
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ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -09
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-27 Setup the date 4
Pressing F4 to let the “second” to be able to be modified, as shown in Fig. 5-28.
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Language
Chinese
English
Out
Local
Chinese
C
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -09
12:50:30
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-28 Setup the date 5
Pressing F3(down) to change the “second” to 20, press F4(Enter) to confirm and
exit, as shown in Fig. 5-29. If you do not want to modify the “second”, pressing
F1(ESC) to escape.
57
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Chapter 5 Operation of Display Panel
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ID: 1
Language
Chinese
English
Out
Local
Chinese
c
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -09
12:50:20
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-29 Setup the date 6
After modification, pressing F1(ESC) to exit and the F1 key will become the
switching key. Pressing F1(switch) to switch the present alarm Window. Pressing
F3 may enter the function setting of next interface.
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Language
Chinese
English
Out
Local
Chinese
System
Battery
Records
Settings
Com. Adress Set
1
Date & Time Set
1
2001£ -11£ -09
12:50:20
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-30 Setup the date 7
5.3.4 Manual battery self-test
Setting of “manual battery self-test” is shown in Fig. 5-31. The Alarm Subwindow
will record the setting.
Pressing F4 to let “manual battery self-test” to be settable, then pressing F2(left)
and F3(right) to move the cursor to “Start Self-test”. If you do not want to start the
“manual battery self-test”, pressing F1(ESC) to escape. If pressing F4 to confirm
the setting(“Start Self-test”), the Current Events and Alarm Window will record the
event of “battery in self test”, after the testing is over, the Window will display
“Switching to Equalization Charging”. The whole testing process needs no manual
intervening. The testing time is dependent on the load capacity.
For example, If the load of 40 kVA UPS is 9kW, the test time is 35 minutes. If the
self-test conditions can’t be satisfied, “Battery Self-test is disabled” will be recorded.
58
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Chapter 5 Operation of Display Panel
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ID: 1
Manual Batt Test
Out
Local
Start
Stop
Display contrast adjust
System
Battery
Records
Settings
3 days
Record Query Range
0: all records
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-31 Manual battery self test
5.3.5 Contrast adjustment
The contrast adjustment is shown in Fig. 5-32. Pressing F2(move left) and F3(move
right) to adjust the bars shown the figure below, thus the contrast is adjusted. Store
the adjusting results after confirmation and exit the contrast adjustment interface.
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ID: 1
Ê Ö¶ ¯µ ç³ Ø× Ô¼ ì
Manual Batt Test
Out
Local
Start
Stop
c
Display contrast adjust
System
Battery
Records
Settings
3 days
Record Query Range
0: all records
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-32 Contrast adjustment
5.3.6 History log
Setting of the range of “history log” (the range is 0-30 days). That is, set up the
number of the days when the history log recorded can be viewed. “0” means all the
history records can be inquired. Pressing F2(up) and F3(left) to adjust the number
of days. Thus, the information of recorded in these days can be viewed and
scrolled through. After modifying the number of days, pressing F3(down) to select
the next item—Background communication mode selection.
59
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Chapter 5 Operation of Display Panel
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Units 2/4
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ID: 1
Ê ¶Ö ¯µ ç³ Ø× Ô¼ ì
Manual Batt Test
Out
Local
Start
Stop
c
System
Battery
Records
Settings
Display contrast adjust
3 days
Record Query Range
0: all records
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-33 History log
5.3.7 background communication setup
Background communication setup includes setting up the communication
mode(MODEM or RS232) , baud rate selection(9600, 4800, 2400 and 1200), call-
back times(1-5 times), as shown in Figure 5-34.
Pressing F4(modification key) to start setting the background communication mode,
pressing F2 (move left) and F3 (move right) to move the cursor to the expected
value, and pressing F4(Enter key) to confirm. If you do not want to modify the
parameters, pressing F1(ESC) to escape.
The setting method of baud rate is the same with above.
The call-back times setup means that when the UPS has a fault, the UPS can call
the number in preset times(if it is set to 5, then call 5 times) through MODEM
automatically. Pressing F4(modifying key) to enter the menu of setting call-back
times, pressing F2 (move left) and F3 (move right) to change the times. Pressing
F4 to store the changed parameter and exit.
After setting the above three parameters, pressing F3 (down) to select the last
three items to be set.
60
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Chapter 5 Operation of Display Panel
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ID: 1
Comm. Mode Set RS232
MODEM RS232
Out
Local
Comm. Baudrate Set 9600
System
Battery
Records
Settings
4800
1200
2400
9600
Callback Times Set 3
3
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-34 Background communication
5.3.8 Call-back number setup
Call-back numbers include call-back number 1, call-back number 2 and call-back
number 3, shown in Fig. 5-35. The length of telephone number is 15 digits, the
number can be that of fixed phone, mobile phone, BP phone or internal extension
phone. Input the number from the first digit and any remaining blanks digits has to
be entered with an asterisk “*”.
When the UPS has any fault, the UPS will call the number through a MODEM
automatically.
Example: Set the call-back number as 0755 8787001. First press F4(modification
key) to enter setting states, the cursor will stop at No.1 digit, waiting for
confirmation and modify this digit or select other digit, as shown in Fig. 5-36.
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ID: 1
Phone Call No. 1
Out
Local
*******************
Phone Call No. 2
*******************
Phone Call No. 3
System
Battery
Records
Settings
*******************
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-35 Fault call-back
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Chapter 5 Operation of Display Panel
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ID: 1
Phone Call No. 1
Out
Local
*******************
Phone Call No. 2
*******************
Phone Call No. 3
c
System
Battery
Records
Settings
*******************
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-36 Setup fault call-back number 1
Pressing F4 key to confirm and save the changed parameter, and then the
functions of keys will be re-defined again, as shown in Fig. 5-37.
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ID: 1
Phone Call No. 1
Out
Local
*******************
Phone Call No. 2
*******************
Phone Call No. 3
c
System
Battery
Records
Settings
*******************
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Fig. 5-37 Setup fault call-back number 2
The range of each digit is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *. “*” means the digit is void.
Pressing F3 (down key) to change the first digit to 0 and pressing F4 to confirm and
return to the higher level menu, as shown in Fig. 5-38.
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Phone Call No. 1
Out
Local
0******************
Phone Call No. 2
*******************
Phone Call No. 3
c
System
Battery
Records
Settings
*******************
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
m
Battery low
Fig. 5-38 Setup fault call-back number 3
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Chapter 5 Operation of Display Panel
Move the cursor to the corresponding bit to modify the number and confirm, then
the 0755 8787001 can be set, fill in the “*” character in other blank bits, as shown in
Fig.5-39. Pressing F1(ESC) to exit the setup of the fault call-back number 1. Other
fault call-back numbers will be set in the same way. At the moment, all the 12
setting items are finished.
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ID: 1
Phone Call No. 1
Out
Local
07558787001******
C
System
Battery
Records
Settings
Phone Call No. 2
*******************
Phone Call No. 3
*******************
11£ -08 12:09
11£ -08 12:09
Input Breaker Closed
Byp. Breaker Closed
Mains Volt. Abnormal
UPS in Battery Mode
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
ok
Battery low
Figure 5-39 Call-back number setup
5.4 Prompt window
The prompt window will be displayed during the operation of the system when the
system needs the user to confirm or to conduct some operations. This system has
about 5 “prompt windows” that will be introduced below.
From bypass to inverter mode with interruption:
If the bypass voltage or frequency exceeds the synchronized range and utility
voltage or frequency is normal, the inverter can’t be in synchronize with the bypass,
and the output can only transfer to bypass after an interruption of about 15ms when
the user press the “Start” key of inverter. Before transferring, the system should let
the user to confirm whether the interruption can be accepted, as shown in Fig.5-40.
Other operations can only be done after confirmation. If the bypass voltage restores
to normal before the user makes confirmation, the UPS will transfer to inverter
mode automatically. At the same time, the prompt window will disappear
automatically.
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Chapter 5 Operation of Display Panel
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Units:
12:30:20
ID 1
B(C) C(A)
220 221
A(B)
221
Mains
Bypass
Out
Local
System
Battery
Power KW
Cap
Loa
2.5
Transferwith Interupt
, Confirm
Cre
Factor
0.1
1.41
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open
UPS in Normal Mode
Batt. Boost Charging
11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
OK
Fig. 5-40 Bypass to inverter prompt
From inverter to bypass mode with interruption:
If the bypass voltage or frequency exceeds the synchronized range and the UPS is
in inverter mode, the system must let the user to confirm and accept the power
interruption danger before pressing the inverter stop key to shutdown the output of
the inverter. The user can also cancel the shutdown operation, as shown in Fig. 5-
41. If the bypass voltage restores to normal before the user makes the confirmation,
the UPS will transfer to bypass operation mode automatically, and at the same time
the prompt window will disappear soon.
UL33-0400L
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Units:
12:30:20
ID 1
B(C) C(A)
220 221
A(B)
221
Mains
Bypass
Out
Local
System
Battery
Power KW
Cap
Loa
C
This operationleads 2.5
to output shutdown,
50.1
1.41
Confirm or cancel
Cre
Factor
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
OK
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-41 Transfer to bypass prompt
Overload due to shutdown: The parallel operation system is in inverter mode, if the
load capacity exceeds the total capacity of the remained UPS units when shut
down one UPS unit. The UPS that is to be shut down will display a prompt window
to ask the user to confirm before shutting down, as shown in Fig.5-42. If the load is
reduced before the user makes confirmation, there will be no overload for the
remained UPS units, this UPS unit will shut down automatically, and the Prompt
window will disappear automatically, the functions of the keys in the Keypad display
window will restore to normal functions.
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Chapter 5 Operation of Display Panel
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Units:
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ID 1
A(B) B(C) C(A)
221 220 221
This operationleads 2.5
Mains
Bypass
Out
Local
System
Battery
Power KW
Cap
Loa
C
to overload, Confirm
or cancel
Cre
Factor
50.1
1.41
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
OK
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-42 Capacity expansion
Start UPS capacity inadequate: When the UPS is in bypass mode, if the load
capacity is larger than that of one or more than one UPS unit, the UPS that has
already been start-up will not transfer to inverter mode and prompt a window to ask
the user to confirm.
When the load is reduced to be lower than the capacity of UPS, the Prompt window
will disappear.
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Units:
12:30:20
ID 1
A(B) B(C) C(A)
221 220 221
System overload,2.5
Mains
Bypass
Out
Local
System
Battery
Power KW
Cap
Loa
Turn on More UPS
Cre
Factor
50.1
1.41
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
UPS in Normal Mode
Batt. Boost Charging
Fig. 5-43 UPS capacity inadequate
Load capacity higher than that of single module UPS system: If the UPS is in
bypass operation mode, and the load capacity exceeds the total capacity of one or
more than one UPS units, the LCD of the UPS that start first will display a Prompt
window, as shown in Fig. 5-44. Under this condition, the user must decrease the
load until the load is lower than the UPS capacity, or switch on the remained UPS
until the total capacity exceeds the load capacity, thus the system can transfer to
inverter mode and the Prompt window disappears.
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Chapter 5 Operation of Display Panel
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Units:
12:30:20
ID 1
B(C) C(A)
220 221
The Load is Too2.5
A(B)
Power KW
221
Mains
Bypass
Out
Local
System
Battery
Cap
Loa
Heavy to Be
50.1
1.41
Transferred
Cre
Factor
11£ -08 12:09
11£ -08 12:09
Input Breaker Close
Byp. Breaker Close
Output Breaker Open
UPS in Normal Mode
Batt. Boost Charging
11£ -08 12:09
11£ -08 12:09
11£ -08 12:09
Fig. 5-44 Load capacity exceed that of single module UPS system
5.5 Events and State Information:
Two kinds of UPS events and status information: Current events and historic events.
Current events are the current status information of UPS and the events that
happen only just now. The information will be displayed in the current event and
alarm display window in time sequence. If a certain status changes or a certain
event happens again, then the status or the event will disappear from the current
event and alarm display window and becomes the historic information.
Historic status information means the information that happens before and not exits
at the moment, or the information happens last time. These kinds of information will
be recorded in the history log in real time according to the time sequence. Each
history log has a start time and if the record is ended normally, there will be an end
time for the history log. If the end time is not recorded due to power failure, then the
historic log will have no end time.
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Chapter 5 Operation of Display Panel
Table 5-3 UPS Events
No.
1
Event
Reason
Start through keypad
The user presses down the inverter start key, the system will
start inverter
Start through keypad failed
The user presses down the inverter start key, the system
can’t start inverter
2
3
4
5
Shutdown through keypad
Emergency shutdown
Fault clear
The user presses down the inverter stop key
The user presses down the emergency shutdown key
The user presses down the fault clear key
Manual mute
When the system is in alarm state, the user presses down
the mute key
6
7
Manual mute cancel
When the system is in mute state, the user presses down
the mute key
Confirm the interrupted
transfer
When the system displays the prompt window to require the
user to confirm, the user presses the “Enter” key
8
Single UPS shutdown
confirmation
When the system displays the prompt window to require the
user to confirm, the user presses the “Enter” key
9
Parallel operation system
shutdown confirmation
When the system displays the prompt window to require the
user to confirm, the user presses the “Enter” key
10
11
12
Manual battery self-test
In function setting menu, the user selects the “Manual
battery self-test”
Stop battery self-test manually
In function setting menu, the user selects the “Stop battery
self-test manually”
Note: If the same event occurs once again, it will be displayed on the current event and alarm display
window according to the time sequence. The last event will become the history log and will disappear
from the current event and alarm display window, and this event can be found in history log. So, only the
event that occurs most recently can be displayed in the current event and alarm display window.
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Chapter 5 Operation of Display Panel
Table 5-4 UPS states
State
No.
1
Reason
Bypass mode
UPS bypass powers the load
The UPS powers the load through rectifier and
inverter
2
3
4
Normal mode
Battery mode
The UPS powers the load through battery
The UPS powers the load through rectifier and
battery together
United power mode
Bypass and inverter all
shutdown
5
Bypass and inverter are all shut down
6
Output power interruption
Battery is under self-test
Generator connection
Generator exit
The UPS has no output
7
UPS is in battery self test condition
Connect the generator to UPS through dry contacts.
Rectifier exits the intelligent generator mode
Rectifier enters the intelligent generator mode
Battery is not in charging state
Battery in equalization charging state
Battery in float charging state
8
9
10
11
12
13
14
15
16
17
18
19
Generator run
Non-charging state
Equalization charging state
Float charging state
Input circuit breaker closes
Input circuit breaker opens
Output circuit breaker closes
Output circuit breaker opens
Bypass circuit breaker closes
Bypass circuit breaker opens
Input circuit breaker closes
Input circuit breaker opens
Output circuit breaker closes
Output circuit breaker opens
Bypass circuit breaker closes
Bypass circuit breaker opens
Maintenance circuit breaker
closes
20
21
Maintenance circuit breaker closes
Maintenance circuit breaker opens
Maintenance circuit breaker
opens
Note: When the UPS is in the above states, current event and alarm display window will display
the states according to the time sequence; When the states are cleared, the information will also
be cleared from the current event and alarm display window and the start time and end time of
the state will be recorded in history log.
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Chapter 6 Maintenance
Chapter 6 Maintenance
This chapter mainly introduces the daily using and maintenance of UPS and the
operation inside the UPS is not covered here. If maintenance should be done to the
UPS, Q1, Q2 and QF1 should be disconnected, and then wait for 8 minutes until
there is no high voltage inside the UPS. Don’t touch any components of the UPS
before reading this manual.
Anything not understood, please consult out technical support engineer.
6.1 Setup procedures
6.1.1 Start up
After the UPS is switched on and if the UPS input power meets specified input
requirements, the following operations can be done:
1. Start from utility
1) Make preparations according to Section 4.1.1, introduce the input source to the
input terminals of UPS cabinet;
2)Turn on Q2 and Q5 and wait until the bypass indicator turns green;
3) Turn on Q1 and the QF1 according to Section 4.1.2. The UPS will transfer to
inverter mode without interruption after the inverter starts normally.
2. Start from utility
When the battery is normal and is connected to the DC bus all the time, the inverter
can start from battery. The start procedures are: press “start” button on the
operation panel for longer than 2s, close Q5 when the inverter operation indicator
turns green. Now the inverter powers the load. At this time the battery indicator and
load indicator all illuminate green.
ꢀ Note:
The UPS can not start from the battery that is used for the first time.
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Chapter 6 Maintenance
6.1.2 Shutdown
1. Shutdown in normal mode
When the UPS requires periodical checking or needs to stop operation, the
shutdown process in normal mode is given below:
1.Press the “inverter shutdown” button on the UPS panel for longer than two
seconds, shutdown the inverter and the system transfers to bypass mode.
2.Switch off the Q1 and QF1 one by one;
At this time the load is powered by bypass. If the load needs not to be powered,
then switch off Q2 and Q5 directly; If the load needs to be powered continuously,
the UPS should be shutdown for maintenance, follow the steps below:
3.Switch on the internal maintenance bypass switch Q3BP;
4.Switch off Q2 and Q5 one by one;
Now the load is powered by the maintenance bypass. Don’t conduct repairing and
maintenance work after waiting for 8 minutes until the voltage of DC bus capacitor
become zero due to discharging.
5.External maintenance bypass KBP should be installed if the UPS needs to be
shutdown totally. Switch off Q2 and Q5, close the KBP, and then switch off the
internal maintenance bypass Q3B, the load will transfer to external maintenance
bypass power without interruption. After this, the UPS unit replacement or capacity
expansion can be done after switching off UPS input and output switches.
2. Shutdown in bypass mode
Follow from step 2 to step 5 of the above “shutdown in normal mode” to shut down
the UPS in bypass mode.
3. Shutdown in battery mode
Note: when the bypass power is abnormal, shut down the UPS in battery mode will
result in the power interruption to the load.
Because the utility is not available, in order to shut down the UPS that is in battery
mode, switch off all the switches to realize shutdown in bypass mode after finishing
the first step in “shutdown in normal mode” .
4. Shutdown in ECO mode
The procedures of shutdown in ECO mode are the same with those of shutdown in
bypass mode.
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5. Shutdown in United powering mode
The procedures of shutdown in United powering mode is the same with those of
shutdown in normal mode.
6.1.3 Transferring between operation modes
The UPS can transfer among various operation modes after it is in normal mode.
The following operations can be done if the input power source of UPS meets the
requirements and the load capacity is lower than that of single module UPS system.
1. From normal mode to battery mode
Switch off Q1, the UPS can transfer from normal mode to battery mode
automatically.
2. From normal mode to bypass mode
Press “inverter shutdown” button to transfer from normal mode to bypass mode
without power interruption.
3.From bypass mode to normal mode
Q1 is closed, press the “inverter start” button on the display panel to transfer from
bypass mode to normal mode. If the bypass source exceeds the normal range,
there will be interruption in the transferring process.
4.From ECO mode to normal mode
Set the UPS in normal mode again and the UPS can transfer from ECO mode to
normal mode.
Note: The engineer should set through software.
5.From battery mode to normal mode
When the rectifier source is normal, switch on Q1, the UPS will transfer from
battery mode to normal mode automatically.
6.1.4 Emergency shutdown and recovery
Under any status, press the “emergency shutdown” button on the panel for 2
seconds if overload or the faults that may endanger the safety occur. The system
will then shut down the rectifier, inverter and stop outputting power(including the
inverter and bypass), at the same time, disconnect the battery contactor.
At this, if the user confirms that the fault is cleared, press the “fault clear” button to
let the system get out of the emergency shutdown state. When the UPS enters the
normal state, the rectifier starts again, the battery contactor closes and the bypass
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begins to power the load. Press the “inverter start” if the user wants the inverter to
operate.
6.1.5 Mute
The buzzer sounds when the UPS has faults. The user can press the “Mute” button
for two seconds to silence the sound. If the user press the key again, the sound can
be heard again. When the UPS is in fault clear state, new fault may cause the
buzzer to sound again.
6.1.6 Fault clear
1.Fault mode and fault handling
The UPS has self-diagnosing functions and the fault types can be inquired through
LCD or background computer. Clear the fault with reference to Chapter 7 or notify
the maintenance engineer to repair. The UPS faults can be classified into the
following types:
1) Alarm fault: The UPS or its parts have fault, but the system operation states
won’t be changed. For example: over load occurs in preset time (Usually overload
may change the system operation state)
2) Recoverable fault: After the fault occurs, the system will shut down the rectifier or
inverter and can recover to normal operation automatically after the fault is cleared.
For example: transformer over-temperature fault.
3) Fault that can be recovered manually: The system is locked up when fault occurs.
It can’t recover normal operation without restarting.
2 Shutdown due to battery low
According to the user’s setting and the setting of host, when rectifier and bypass
power failure occurs, the system will operate from battery continuously until shut
down due to battery low. If the Utility power recovers after UPS shutdown, the
methods to restart the UPS are given below:
1) If the system is set as “select inverter mode manually”, the system will maintain
its locking state until the user starts the inverter.
2) If the system is set as “automatic bypass mode”, the system will transfer from
locking state to bypass mode after the Utility source or bypass restores to normal.
3) If the system is set as “automatic inverter mode”, the system will transfer from
locking state to inverter mode after the Utility source or bypass restores to normal.
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6.1.7 Monitoring system
1. Background communication
The monitoring system of this UPS system provides one RS232 port and one
RS485 port (the definition of the port is in Section 3.4.3), several input and output
dry contacts (refer to Section 3.4.4). The user can introduce the signal to the
nearest management office to conduct equipment management. All the data
displayed on the panel will be monitored by background monitoring software.
Besides, there are also MODEM and SNMP cards, which are used for MODEM and
SNMP communication.
1）RS232 mode
The transmission distance of RS232 mode is shorter than 15m. This RS232
mode is suitable for the short distance monitoring required by UPS operator or
user.
2）RS485 mode
The J23 connector on the monitoring board is used for user’s RS485 port.
“485+” and “485-” are used as the user’s positive terminal and negative terminal
respectively. SHIELD terminal is used as the shielding terminal that connects the
shielding layer.
The transmission distance is shorter than 1000m. The user can use any
RS485/RS232 converter(such as the OCI-6 provided by us) to realize
networking of RS485+RS232 mode.
3）MODEM mode
The user can monitor the UPS remotely via a MODEM and the monitoring
software- POWERSTAR by dialing the preset telephone number. Refer to
“Directions of MODEM” and “Directions of POWERSTAR” for details.
4）SNMP mode
The parts of SNMP card UF-SNMP111 is compatible with 10/100M either net.
The SNMP card supports various kinds of protocols of SNMP, TFTP, HTTP and
TELNET and providing a solution for high speed network access method.
The user can connect the UPS to the LAN through the SNMP card and realize
the network management.
Refer to “Directions of SNMP” card for details.
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2. Monitoring single UPS
UPS support the communication modes through RS232, RS485, MODEM and
SNMP card. These communication modes can’t be used by one same UPS. The
single UPS monitoring theory is shown in Fig.6-1.
Fig. 6-1 Monitoring of Single UPS
3. Monitoring parallel operation system
The communication of parallel operation system is realized through its internal
RS485 bus. Any UPS module can be nominated as a master UPS. The user can
use any communication mode to get the information of any UPS module through
this master UPS. The monitoring method of parallel system is shown in Fig.6-2.
Fig. 6-2 Monitoring of Parallel UPS System
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6.1.8 Input and output contacts
The functions of input and output contacts are introduced in Chapter 3.
1. Output dry contact
This UPS provides 8 kinds of dry contacts output and the definition is given below:
Battery low: This signal is active when the pre-alarm of UPS battery occurs;
Battery mode: This signal is active when the battery powers the load;
Inverter mode: This signal is active when the utility powers the inverter normally;
Ambient over-temperature: This signal is active when the ambient temperature is
too high;
Emergent shutdown: This signal is active when the UPS is shut down by user in
emergency;
Common alarm: This signal is active when the UPS has fault;
Overload: This signal is active when the load is too heavy;
Generator mode: This signal is active when the generator powers the UPS;
2. Input contacts
The UPS can connect to 6 circuit-branches of contacts for environment parameters:
24V contacts for environment parameters (3 circuit branches): ENV1-3, suitable for
connecting the 24V sensor for environment parameters, such as the infrared sensor.
The contacts are relay dry contacts.
12V contacts for environment parameters (1 circuit branch): ENV, suitable for
connecting the 12V sensor for environment parameters, such as the water sensor.
The contacts are relay dry contacts.
Generator contacts: These are the dry contacts of intelligent generator and are
connected to the UPS input terminals. The contacts are used to notify the UPS that
the generator has been connected. If the user wants to use intelligent generator
mode, but the generator has no signal to transmit to these contacts, short connect
the “GEN-H” and “GEN-L” to notify the UPS that the generator is connected after
the generator starts.
ꢀ Note:
If the user wants to use the generator mode, it is required that the UPS should be
set to “Generator mode enabled” through the background host first. Otherwise, the
generator signal is inactive.
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Chapter 6 Maintenance
Emergent stop: If the user is in short distance, short connecting the “UCTRH” and
“UCTRL” can make the UPS shut down. Relay dry contacts should be used here.
ꢀ Note:
The user should be careful when using this function. The power will be interrupted
completely once the emergency shutdown happens. When the user connects the
wires, the length of the wire should be no longer than 10m. Protection measures
should be done to the wire if the length of the wire is longer than 10m.
6.1.9 Temperature measuring
Two circuit branches of temperature can be measured.
J12 socket: Used to measure the battery temperature with the temperature sensor
TMP12Z made by Avansys. During installation, our service engineer has set the
function of “temperature compensation enabled”. Temperature compensation is
realized once the TMP12Z is connected.
J16 socket: The V-AD pin of this socket is used to measure the ambient
temperature of other points. Our service engineer can set the over temperature
alarm point through background host. The UPS will alarm when the temperature is
too high. Note: The 1.0~5.0V signal corresponds to 0~100°C.
6.2 Maintenance
6.2.1 Daily maintenance
There are few moving parts inside the UPS with the exception of the fans, thus few
components need to be maintained. The user should check according to the
following methods:
1. Daily checking
1）Check the control panel: All the LEDs should illuminate normally. The LCD
should display all the parameters normally without alarm.
2）Check whether there is over-temperature phenomena of the air blown out by
fan;
3）Check whether there is any abnormal noise;
4）Check whether the ventilation holes are obstructed;
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Chapter 6 Maintenance
5）Check whether all the fans operate normally. The life of the fan in continuous
operating state is 20000—40000 hours and will be shortened if the fan operates in
high temperature environment.
2. Weekly checking
1）Measure and record the battery charging voltage;
2）Measure and record the battery charging current;
3）Measure and record the UPS three-phase output voltage;
4）Measure and record the output current of each output phase of UPS; If the
current differs greatly with previous values, record the load capacity, types and
location for later analysis.
Please contact us if the displayed value differs with the calculated value.
3. Annual checking
ꢀ Note:
The annual checking must be done by qualified person because the person may be
required to test the high voltage components inside the UPS.
During annual checking, the load should be powered by maintenance bypass.
Each year, the UPS should be cleaned and the following items should be checked:
1）At first, check the weekly checking items;
2）Switch off the UPS and let the maintenance bypass to power the load;
3）Switch off the input switch and battery switch;
4）Make sure that the input terminals of the UPS(R1, S1 and T1), battery terminals,
output terminals(U4, V4 and W4) and bypass input terminals (R4, S4 and T4) are
not energized;
5）Open the UPS door and internal protection door
6）Check the UPS power components and auxiliary components, pay attention to
the following parts:
Capacitor: check whether there is any leakage and deform phenomenon;
Magnetic component: Check whether there is any over-temperature marks and
cracks, and the secure degree
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Chapter 6 Maintenance
Cable and connectors: Check whether the cable is aged, damaged or burnt; check
whether the connector of the PCB is secure;
PCB: Check the cleaness and completeness
7）Use vacuum pump to clear the dirt on the surface;
8）Switch on the UPS again and let the inverter powers the load according to the
start-up process of UPS;
9）If necessary, switch off the Q1, check the battery backup time, switch on Q1
when the battery voltage is higher than the end of discharge voltage by 5V(Note:
The end of discharge voltage is 300Vdc. When the battery voltage reaches 300Vdc,
the battery input contactor will disconnect and the load will transfer to bypass ), and
record the backup time.
4. Other checking
1）Check the insulation sleeve of input/output cables and the connectors: check
periodically and the UPS should be switched off when checking. The checking
interval should not be longer than 2 years;
2）Lightning protection checking: Check according to the methods of weekly
checking because you can only check the indicator of lightning protection device by
opening the door. Check each day in wet seasons or the seasons with lots of
thunders. Check the lightning device in time when lightning occurs nearby to find
problems in time.
6.2.2 Battery maintenance
The internal battery of iTrust series UPS is a sealed, lead-acid, maintenance-free
battery. The battery life depends on the ambient temperature, charge and discharge
times. High ambient temperature and deep discharge will shorten battery life.
1 battery storage
To ensure battery life, the battery should be maintained regularly:
1）Check the battery state periodically. Keep the battery room and battery cabinet
clean. Clear the oxidization objects at the terminal or connection bar periodically
and apply some butter. Tighten the loose screws and keep the battery well
connected to prevent big voltage drop during discharging.
2）Check the battery insulation every 2-3 months. Check the total battery voltage
once a week. Use the automatic battery management function to charge the battery
whose voltage is low. Clean the leakage solutions periodically.
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Chapter 6 Maintenance
3）Keep the ambient temperature between 15℃and 25℃.
4 ） To prevent small current discharge, continuous battery discharge time
exceeding 24 hours is prohibited.
5）Please contact the distributor if the battery backup time is greatly shortened, or
the UPS LCD displays “battery needs to be replaced”. Confirm whether the battery
needs to be replaced. Please confirm whether the parameters of the replaced
battery and new battery are same.
6）Check whether the auto battery management function is normal because many
battery maintenance work is done automatically through the battery management
functions, for example, charging the battery periodically, temperature compensation,
EC/FC switchover, battery low alarm and battery life forecast.
2. Manual battery self-test
The conditions for self test:
1）Battery contactor closes
2）Battery is in float charging state;
3）Rectifier and inverter communicate normally;
4）Battery status is normal;
5）Rectifier operates normally;
6）Utility source voltage is normal;
7）Inverter operates normally
8）Load capacity is larger than the battery capacity set by battery curves;
9）UPS is not in united operation (generator + battery) mode
The battery self test will be conducted only all of the above conditions are satisfied.
During the self test, if any one of the above condition is not satisfied, the system will
exit the self test state and enter equalization charging state.
Pressing the “stop manual self test” can stop the self test process and the battery
transfers to equalization state.
Battery will transfer to equalization state after self test is over.
3. Auto battery self test
Auto self-test is start if the UPS operation states satisfies the manual self-test
condition and the last self-test interval satisfy the “battery discharging interval”. The
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Chapter 6 Maintenance
system will not start battery self test if the last self-test interval satisfies the “battery
discharging interval”, but does not satisfy the manual self test condition, and the
system will wait until the conditions are satisfied.
6.2.3 Shutdown maintenance
For large capacity UPS, periodical checking is required to ensure the normal
operation and proper condition. Notify us if any fault is found. In order to maintain
the uninterrupted power supply to the load, please shut down the UPS according to
the following procedures:
1.Press the “inverter shutdown” button to shut down the inverter, the system
transfers to bypass mode;
2. Switch off Q1 and QF1 one by one;
3. Switch on the maintenance bypass switch Q3BP;
4. Switch off the Q2 and Q5 one by one.
5. Now, the load is powered by the maintenance bypass of UPS. Conduct
maintenance or checking to the UPS after waiting for 8 minutes and the DC bus
capacitor discharges to zero voltage.
If the UPS is required to be shutdown totally, switch on the external maintenance
bypass switch KBP after switch off the Q2 and Q5; then switch off the Q3BP, thus
the load can be powered by the maintenance bypass with interruption, and the UPS
units replacement and capacity expansion can be done after switching off the input
and output power distribution switches.
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Chapter 7 Troubleshooting
Chapter 7 Troubleshooting
7.1 UPS system troubleshooting
The following information are only for service engineers who are trained in the
repair and troubleshooting of the UPS. The maintenance engineer must be familiar
with the UPS because the UPS is rather complicated.
7.1.1 Basics
Generally, the UPS faults happen suddenly and the UPS will be shutdown or
transfer to bypass mode. So making record is very important for maintenance.
Please observe the following contents:
The error of UPS output voltage should not exceed 2%;
The battery charging current should not exceed 6A.
Find out the reasons if the UPS displayed value differs greatly with the calculated
values. The user should be informed of the load condition before starting
troubleshooting.
7.1.2 Procedures
Status recording: Record the displayed information, the buzzer sound, states of
indicators and the states of various switches when fault occurs.
Fault types: After recording all the information, look up the fault information table
and the fault indicators, if the fault type can not be determined yet, please contact
supplier or technical support engineer.
Fault record: After identifying the fault type, please notify our service engineers for
repairing.
7.2 LED indicator
7.2.1 LED display
There are 6 LEDs used for indicate the operation status and fault. There is a fault if
the LED illuminates red.
Bypass indicator: If it turns red, that means the bypass input exceeds the normal
range;
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Chapter 7 Troubleshooting
Rectifier indicator: If it turns red, that means the rectifier fails;
Battery indicator: If it turns red, that means the battery is abnormal;
Inverter indicator: If it turns red, that means the inverter fails;
Load indicator: If it turns red, that means overload occurs;
Alarm indicator: If it turns red, that means the system fails;
7.2.2 LED indicator of lightning protection device
Fig. 7-1 Lightning protection LED
LED indicators of lightning protection device of 40/60kVA UPS are shown in Fig.7-1.
From bottom to up the LEDs are: Lightning protection indicators of Phase A, B and
C; LED indicators of lightning protection device of 40/60kVA UPS are arranged from
left to right and are indicators of Phase A, B and C respectively. The device is
normal if the indicator illuminates green, and fails if the indicator turns off. The
checking of the indicators is described in Chapter 6.
7.3 Buzzer alarm
If the buzzer sounds 1 second “click” every 2 seconds, that means the system has
normal alarm or the system is abnormal;
If the buzzer sounds continuously, that means the system has serious fault.
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Chapter 7 Troubleshooting
7.4 LCD indication for fault information
The LCD on the UPS displays the fault information of Table 7-1 and Table 7-2. The
user should locate and analyze the fault according to the tables and feedback the
fault information to our service engineers.
Table 7-1 Fault information
No.1
1
Fault description
Reason
Actions to be taken
Communication of
inverter fails
Communication between monitoring
unit and inverter fails
Notify the service engineer for repairing
Communication of
rectifier fails
Communication between monitoring
unit and rectifier fails
2
Notify the service engineer for repairing
Ambient over-
temperature
3
4
5
6
7
over-temperature of UPS room
Check the ventilation of UPS room
Environment
Environment parameter channel 1
Check the devices relating to the channel
Check the devices relating to the channel
Check the devices relating to the channel
Check the devices relating to the channel
parameter 1 abnormal has alarm
Environment
Environment parameter channel 2
has alarm
parameter 2 abnormal
Environment
Environment parameter channel 3
parameter 3 abnormal has alarm
Environment
12V environment parameter channel
has alarm
parameter abnormal
Rectifier input voltage
abnormal
Line-to-neutral voltage of rectifier Check
the
line-to-neutral
voltage
voltage
8
9
exceeds normal operation range
amplitude of rectifier
Line-to-neutral voltage of rectifier
lower than 305V, but higher than
208V
Rectifier input under-
voltage
Check
the
line-to-neutral
amplitude of rectifier
Rectifier’s input
voltage frequency is
abnormal
Rectifier frequency exceeds the Check the rectifier’s input voltage
10
normal range
frequency
11
12
Input fuse blows
Rectifier input fuse blows up
Notify the service dept for repairing
Input transformer over
temperature
Temperature of input transformer is Check the ambient temperature and
too high ventilation
Input phase rotation Rectifier’s input phase rotation is Notify the UPS service engineer, check
13
14
reverse
reverse
the wiring of rectifier input cables
Input softstart fails
Input softstart fails
Notify the service dept for repairing
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Chapter 7 Troubleshooting
Reason
No.1
15
Fault description
Actions to be taken
Bypass voltage or frequency is out
of normal range and inverter output
is not synchronized with the bypass
output.
Bypass
Check the bypass voltage and frequency
unsynchronized
Bypass
voltage
or
frequency
Bypass ratings exceed exceeds the normal range and the
16
Check the bypass voltage and frequency
Notify the service dept for repairing
the normal range
Bypass SCR fails
bypass will not power the load
anymore.
17
18
Bypass SCR is damaged
If the over current time exceeds the
limit, the UPS may shut down the
bypass and the inverter.
Bypass over current
timeout
Check the load, if it is normal, then restart
the UPS
When the overload delay time is due
in inverter mode, if at this time the
bypass has fault, then the inverter is
shutdown.
Repair the bypass and reduce the load,
and then restart the UPS. Note: Don’t let
the UPS in over load state for a long time.
Shutdown due to
bypass fault
19
20
The battery life is reduced due to Notify the service dept for replacing the
aging, which may endanger the battery and set the battery model and
normal operation of UPS. Warn the parameters through software.
user that the battery is abnormal and
Battery needs to be
replaced
needs to be replaced.
No battery
Check the battery and the wiring of
21
22
Batteries are not connected.
batteries
The battery discharges to pre-alarm
Pre-alarm for end of point (the battery capacity is
Shut down the load in time
battery discharging
inadequate), the system may shut
down after a few minutes
battery over
temperature
Check the battery temperature and
ventilation
23
24
25
26
27
28
29
battery temperature is too high
Battery contactor fails
Battery contactor is
abnormal
Notify the service dept for repairing
battery self-test is The battery condition for self-test is Start the self test after the conditions can
disabled
not satisfied
meet the requirements
Battery is connected
reverse
Notify the UPS service engineer to
connect the battery again
Battery is connected reverse
Bypass phase rotation
is reverse
Notify the UPS service engineer to
change the bypass phase rotation
Bypass phase rotation is reverse
Rectifier is abnormal and has Notify the service dept for repairing
serious fault
Rectifier fails
Rectifier heatsink over Rectifier heatsink temperature is too The UPS can recover automatically.
temperature high Check the environment and ventilation
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Chapter 7 Troubleshooting
Reason
No.1
30
Fault description
Rectifier fan fails
Actions to be taken
Rectifier fan is abnormal
Replace the fan in time and the UPS can
recover automatically
Rectifier contactor
abnormal
Rectifier contactor can’t be closed or
opened normally
31
32
33
Notify the service dept for repairing
Notify the service dept for repairing
Notify the service dept for repairing
Auxiliary contactor
abnormal
Auxiliary contactor abnormal can’t
be closed or opened normally
Auxiliary power supply At least one auxiliary power supply
1 fails
fails
The IGBT of rectifier has over
34
35
Rectifier over current current resulting in the shut down of Notify the service dept for repairing
rectifier.
Check if the bypass is normal. The fault
Inverter is asynchronous with
Inverter asynchronous
alarm stops automatically after the
bypass recovers normal
bypass
36
Inverter fails
Inverter output fails and shuts down Notify the service dept for repairing
Inverter heatsink over Inverter heatsink temperature is too The UPS can recover automatically.
137
temperature
high
Check the environment and ventilation
Replace the fan in time and the UPS can
recover automatically
38
39
40
Inverter fan fails
Inverter fan is abnormal
Inverter SCR fails and has no
output. UPS shuts down
Inverter SCR fails
Notify the service dept for repairing
Notify the service dept for repairing
Auxiliary power supply At least one auxiliary power supply
2 fails
fails
The IGBT of inverter has over Restart the inverter, if the fault can’t be
current resulting in the shut down of cleared, notify the service dept for
41
42
Inverter over current
inverter.
repairing.
DC bus voltage is too low resulting Check whether there is fault in rectifier
Shutdown due to low
bus voltage
in the shutdown of inverter
side, if no, then check whether overload
occurs. Restart after clearing the fault.
Output transformer
over temperature
Output transformer temperature is
too high
Auto recovery, ambient and ventilation of
UPS should be checked.
43
44
Load is too heavy
Disconnect unnecessary load and ensure
the safety.
overload
Overload exceeds
normal time
Over load occurs in inverter mode, If the load decreases after 5 minutes, the
45
46
47
transfers to bypass mode
system will back to inverter mode
Notify the service dept for repairing
Notify the service dept for repairing
Output fuse blows up Output fuse blows
AC
output
over Output over voltage
voltage
Surge current occurs in bypass Avoid applying big load abruptly and short
mode, the system shutdown circuit
48
Output surge current
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Chapter 7 Troubleshooting
No.1
49
Fault description
Reason
Actions to be taken
The system transfers to bypass
Transfer to bypass
due to surge
mode due to surge current and back Avoid applying load abruptly and the UPS
to inverter mode after load is can recover automatically
decreased
Wrong operation such as start the
User’s wrong
operation
50
51
UPS with the maintenance bypass Operate with reference to User’s Manual
switched on
The actual transfer
times exceed the
permissible transfer
times per hour
Transfer times exceed the times set
by background. The system will stay
Avoid frequent overload
in bypass mode until next hour.
Table 7-2 Fault of parallel operation system
No.
1
Fault description
Reasons
Fault processing
Overload of parallel Overload occurs and the Disconnect the load of low priority, maintain the
operation system
redundancy is not available
power supply to important load
In parallel operation system,
some UPS module may
require to transfer to bypass
due to surge or overload,
other modules will transfer to
bypass after receiving the
signal sent by this UPS
module that requires to
transfer to bypass mode
Neighbouring
UPS
If the parallel operation system transfers to
bypass mode, and the operation condition
enables, all the UPS modules can recover to
normal mode synchronously.
module requires to
2
transfer
mode
to
bypass
The load current of each UPS
module is noticeably
3
4
Load sharing fault
Notify the service dept for repairing
Notify the service dept for repairing
unbalanced, thus the system
loading ability is affected.
Parallel operation
board fails
The board is damaged.
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Chapter 8 Parallel System
Chapter 8 Parallel System
8.1 System Introduction
8.1.1 Basics
The Liebert UPS uses intelligent and reliable decentralized parallel operation
technology. A maximum of four single units of the same capacity can operate in
parallel.
The UPS system has two paralleling modes:
ꢁ
ꢁ
Paralleling for redundancy
Paralleling for capacity
1. Conditions for parallel operation
Each UPS unit has the same capacity, same software and hardware version
Each UPS in the system must share the same bypass source
The UPS output are connected together. The rectifier input can be from a different
source, but the phase rotation of the rectifier input, bypass input and output must
be the same
The parallel logic cable and load sharing cable must be connected
2. Features of parallel systems
1）The hardware and firmware of each unit in the system must be compatible and
changing the operation mode can be done only with changing the software setting.
2）The parallel signal bus is simple, reliable and designed for redundancy, which
provides the user with maximum flexibility. Shutting down or starting up the UPS in
the parallel system can be done in any sequence. If an overload occurs, the
system can recover automatically from bypass mode after the overload is cleared.
3）The operation status can be queried from each UPS’s LCD display.
4）The UPS monitoring module (optional) can monitor the system parameters of
the whole system.
5）Any single module UPS system in the parallel system can be designated as the
host for communication with remote computer. The total load current, number of
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Chapter 8 Parallel System
UPS in the system, and operation condition of each unit can be monitored through
the remote computer.
8.1.2 Theory of Operation
1. Parallel System consisting of two units
This is the most frequently used configuration and its operation theory is shown in
Figure 8-1
Fig. 8-1 UPS parallel operation mode(two UPS modules)
2. Paralleling for Redundancy of more than two units
(N+X) system : N number of UPS is supporting the load and X number of UPS are
redundant. If the rating of each UPS unit is Po and the total load capacity is Pmax,
then (N-1) x Po < Pmax < N x Po, as shown in Figure 8-2
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Chapter 8 Parallel System
Fig. 8-2 Redundancy operation mode
This system can improve the system reliability noticeably. In normal condition, each
UPS does not work at full load, so even if the load is increased, the system will not
transfer to bypass.
When X number of UPS shuts down due to failure, the remaining N numbers of
UPS can still powers the load. At this time, the system will give out the alarm.
3. Paralleling for Capacity Expansion
In this system, X is zero then if the rating of each UPS unit is Po and the total load
capacity is Pmax, then (N-1) x Po < Pmax < N x Po, as shown in Figure 8-3. This
system cannot improve the reliability, but can improve the system capacity to
support an increased load.
Fig. 8-3 Capacity expansion
4. Series “Hot-Standby” parallel system
Two UPS units are connected in series, one is the Master and the other Slave.
The Slave output is the bypass source of the Master, as shown in Figure 8-4. In
normal condition, both UPS are in normal mode with the inverter supporting the
load. If one unit fails, the other will power the load. In order for the system to rotate
powering the load, the alternative operation time must be set. If two different UPS
are connected in series, the load capacity must be smaller than the UPS with the
smallest rating.
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Chapter 8 Parallel System
Fig. 8-4 Series backup mode
ꢀ Note
The default value of alternative operation time is 168 hours and the range is 0-4320
hours
8.1.3 Operation modes
The parallel operation system also has operation modes such as normal mode,
battery mode, bypass mode and maintenance bypass mode. All the UPS units
inside the parallel operation system should operate in harmony. For example if one
UPS is in inverter mode, the bypass of other units should be shut down.
Normal mode: The load is powered by the inverters of all the UPS units inside the
system. If the bypass frequency is in the synchronous range, the inverter will be
synchronous with the bypass. Otherwise, the system will operate at nominal
frequency.
Battery mode: The batteries of the system powers the load through inverters of all
the UPS units. The system operates at nominal frequency.
Bypass mode: The condition to transfer to bypass mode is same with that of single
module UPS system. The bypasses of all the UPS units power the load.
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Chapter 8 Parallel System
Maintenance mode: The condition to transfer to maintenance mode is same with
that of single module UPS system. The maintenance switches should be switched
on synchronously as possible. Thus the system can be repaired without interrupting
the power supply to load.
8.2 Installation
The installation method of parallel operation system is the same with that of single
module UPS system. The following contents only introduce the installation
procedures relating to parallel operation system.
8.2.1 Cabinet installation
1. Parallel operation system with two UPS units
The layout of 40/60 kVA UPS system is shown in Fig.8-5. Two UPS units are placed
in the middle side by side. Each battery cabinet is placed next to the UPS unit. The
battery cabinet should be placed in front of or behind the UPS cabinet if considering
capacity expansion.
The layout of 20/30 kVA UPS system is the same with that of 40/60kVA UPS.
UPS cabinet 2
UPS cabinet 1
battery cabinet 2
battery cabinet 1
Fig. 8-5 40/60KVA UPS Layout
2. Parallel operation system with multi UPS units
Please place the battery cabinet in front of or behind the UPS cabinet for shorten
the battery cables and battery temperature sampling cables and for convenient
capacity expansion.
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Chapter 8 Parallel System
8.2.2 Electrical installation
1. Power cables
Wiring of power cables is the same with that of single module UPS system.
ꢀ Note:
The length and specifications of power source cables including the bypass input
and UPS output cables should be the same, thus the load can be shared evenly in
bypass mode.
2. Signal cables
Wiring of signal cables is the same with that of single module UPS system. Parallel
connection cables should be connected.
You can see the holes for parallel connection cables when opening the front door of
the UPS system. According to the routes, two parallel connection cables are
connected to the P1(P2) and P3(P4) sockets on the ULW2L61M3 parallel board, at
the same time tighten the screws between the connector and sockets. P1/P2 on the
ULW2L61M3 board are two 15-pin sockets with same functions and are used to
transmit parallel logic signal. P3/P4 are two parallel 9-pin sockets with same
functions and are used to transmit the load sharing detection signal. The wiring
method of parallel connection cables of three UPS units are shown in Fig.8-6.
left post
left post
left post
Logic cable
Load sharing detection
Load sharing detection
Load sharing detection
Logic cable
Logic cable
UPS 1 parallel
board
UPS 2 parallel
board
UPS 3 parallel
board
Fig.8-6 Connection of Parallel Operation Cables
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Chapter 8 Parallel System
8.3 External Power Distribution
Parameters such as maximum permissible input current (In is the rated input
current) of each UPS, capacity of input circuit breaker(suitable for rectifier input and
bypass input) are given in Table 3-5. It is recommended that the input power source
of each UPS unit should be input to its own circuit breaker in the switchgear. The
battery group shouldn’t be shared among the UPS units. Each UPS unit should be
equipped with an output circuit breaker for the convenience of switching off the
UPS during maintenance. The capacity of the output switch of the power cabinet
should be selected according to the maximum capacity of the parallel operation
system considering the redundancy. The specifications of the switch are given in
Table 8-2.
Table 8-2 Output Power distribution parameters
Capacity of output circuit breaker
UPS capacity
30kVA 40kVA
20kVA
63A
60kVA
100A
Single module UPS system
63A
63A
100A
100A
200A
300A
400A
500A
600A
700A
800A
1+1
2+1
63A
100A
200A
300A
400A
500A
600A
700A
800A
125A
200A
250A
300A
400A
450A
500A
125A
200A
250A
300A
400A
450A
500A
3+1
Parallel
operation
modes
4+1
5+1
6+1
7+1
8 UPS units
8.4 Start up of Parallel Operation System
Check the input and output wiring of each UPS unit. Ensure that the phase rotation
of the rectifier, bypass and output of each UPS unit is same. Ensure the parallel
connection cables are connected firmly.
1. Switch on the UPS units one by one and check their operation states:
(1)Commission each UPS unit referring to Chapter 4 for the methods.
(2)Set the parameters of each UPS unit through background host and adjust the
parameters of parallel operation system.
Configuration setup: Each UPS unit should be set as “parallel” mode. The UPS unit
that is connected to the background host should be set as “connect to background
host”;
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Chapter 8 Parallel System
Code setup: Each UPS unit has its own code, and set the codes of each UPS unit
as 1, 2, 3 .n(n 8) one by one;
Set the number of UPS units N and number of redundancy UPS units X: If there is
M UPS units in the system, if the system is the paralleling system for capacity
expansion, then M=N, X=0; In redundancy system, M=N+X, Xƒ1. The settings of N
and X should take the actual load capacity into considerations.
(3)After the commissioning of each UPS unit is completed, press “inverter
shutdown” to shutdown the inverter, switch off Q2 and Q5;
2. Switch on Q5 of each UPS unit, press the “inverter start” button of each UPS unit
and check the output phase rotation. If the phase rotation is not correct, the LCD on
the UPS unit will display “inverter asynchronized” , the inverter indicator flashes
continuously and the unit cannot transfer to inverter mode. If some UPS unit has
abnormal alarm sound, the parallel connection cables must have problem.
3. Switch on the bypass switch Q2 of each UPS unit to input the bypass source;
4. Press the “inverter shutdown” button of each UPS unit one by one, transfer to
bypass source;
5. Switch on each UPS inverter one by one and apply the load after the last UPS
transfers to inverter mode. The load parameters can be inquired through the panel
of any UPS. When the load is heavy, check the load rate of each UPS unit and if
the rates are roughly the same, then the parallel operation system must operate
normally.
ꢀ Note:
After commissioning, the UPS can only operate after the qualified engineers have
set the parameters.
8.5 Using the Parallel Operation System
The user can use the UPS that has start up. The using methods of parallel system
are the same with that of single module UPS system.
8.5.1 Switch on the Parallel System
1. Start from utility
The process of switching on the parallel system that has no load is same with the
start up process.
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Chapter 8 Parallel System
When switching on the parallel system, external maintenance bypass switch KBP is
recommended be equipped to maintain the power supply to load in case of UPS
shutdown due to failure or maintenance.
Before switching on the UPS, all the circuit breakers but the KBP should be
disconnected, the utility powers the user’s load directly.
1. Switch on the internal bypass maintenance switch Q3BP of the UPS;
2. Disconnect KBP;
3. Switch on the Q2 and Q5 of each UPS unit;
4. When each UPS unit finishes the self test and the bypass operates normally
(the bypass indicator and load indicator illuminate green)，disconnect the
Q3BP inside each UPS unit;
5. Switch on Q1 of each UPS unit and QF1 of correspondent battery cabinet;
6. After the rectifier starts (rectifier indicator illuminates green) ，press the
“inverter start” button to start the inverter;
7. After each UPS unit’s inverter starts, each UPS unit will transfer from bypass to
inverter and powers the load together.
At this time, the start-up of the UPS parallel operation system is over.
2. Start from battery
When the parallel operation system starts without load, start each UPS unit，and
then connect the load. The start process of each UPS unit is the same with that of
start of single UPS, that is, press the “inverter start” button one by one and then
switch on Q5.
When starting the parallel operation system with load, start each UPS unit one by
one, and the start process is same with that of starting single module UPS system.
If the inverter capacity is smaller than the load capacity, the inverter indicator will
flash until the total capacity of the inverters that have start is bigger than the load
capacity. At last, all the inverters that have start power the load together.
8.5.2 Shutdown the Parallel Operation System
1. Shutdown in normal mode
UPS parallel operation system should shut down in normal mode if the periodical
maintenance and repairing are required:
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Chapter 8 Parallel System
1. Press the “inverter shutdown” to shut down the inverter and the system
transfers to bypass mode;
2. Switch off each UPS unit’s Q1 and the QF1 of battery cabinet;
3. Switch on each UPS unit’s Q3BP；
4. Switch on each UPS unit’s Q2 and Q5；
AT this time, the user’s load is totally dependent on the maintenance bypass of the
UPS; Common checking or maintenance work can be done after waiting for 8
minutes( that is, after the DC bus capacitor discharges to zero voltage).
If the UPS requires to be switched off totally, switch on the KBP，switch off all the
Q3BP switches, and then transfer the load to external maintenance bypass. Then
the replacing or capacity expansion operation can be done after disconnecting the
UPS input and output switches.
2. Shutdown in bypass mode
Follow the step 2-step 5 of “shutdown in normal mode” to shut down the UPS in
bypass mode.
3. Shutdown in battery mode
If the utility is unavailable, conduct the step 1 of “shutdown in normal mode”, and
then switch off all the switches.
4. Shutdown in united operation mode
The procedures of “shutdown in united operation mode” is the same with that of
“shutdown in normal mode”.
8.5.3 Transferring between Operation Modes
When the parallel operation system is in normal mode, it can transfer between
different operation modes, so the maintenance engineer can judge whether the
system operate normally according to the transferring condition. If all the sources of
the UPS is in normal range, conduct the following operations:
1. Normal mode to battery mode
Switch off all the UPS units’ Q1 and Q2，the system will transfer from normal mode
to battery mode.
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Chapter 8 Parallel System
2. Normal mode to bypass mode
Press the “inverter shutdown” button on the UPS panels one by one, all the UPS
can transfer to bypass mode.
In the above operation, if the total capacity of all the inverters is smaller than the
load capacity, all the UPS unit will transfer from normal mode to bypass mode.
3. Bypass mode to normal mode
Q1 has already been switched on, press the “inverter start” button on the UPS
panels one by one until the total capacity of all inverters is bigger or equal to load
capacity, all the UPS units will transfer from bypass mode to normal mode.
4. Battery mode to normal mode
If the utility is normal and the Q1 of all the UPS units are switched on, the UPS will
transfer from battery mode to normal mode automatically.
5. Normal mode to maintenance bypass mode
Follow the Steps 1～4 in section 8.5.2 to switch the UPS from normal mode to
maintenance bypass mode.
8.5.4 Repairing the failed UPS unit in parallel operation system
1. Shut down and isolate the failed UPS in parallel operation system
When some UPS unit fails in the system, isolate it and let other UPS units continue
to operate, the procedures are given below:
1) press “inverter shutdown” button to shut down the inverter of the UPS. Note:
Before switching off this UPS, verify whether the remaining UPS units can power
the load;
2) switch off this failed UPS unit’s Q5, Q2 and Q1;
3) switch off this failed UPS unit’s battery switch QF1;
4) maintenance work can be done after waiting for 8 minutes( that is, after the DC
bus capacitor discharges to zero voltage).
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Chapter 8 Parallel System
ꢀ Note
At this time, the input and output terminals of this failed UPS unit are still energized.
Switch off the unit’s input and output circuit breakers if these terminals may be
touched during maintenance.
2. After repairing the failed UPS, connect it to the parallel operation system
again
After repairing the failed UPS, the procedures to connect it to the parallel operation
system are given below:
1) If this UPS unit’s input and output circuit breakers have been switched off during
maintenance, switch on them again;
2) Switch on this UPS unit’s Q1 and Q2;
3) Switch on this UPS unit’s battery switch QF1;
4) When this UPS unit’s rectifier starts (the rectifier indicator illuminates green),
press the “inverter start” button to start the inverter. If the inverter can be start, then
the UPS recovers to normal, otherwise switch off and isolate the UPS unit again
and repair it;
5) After the inverter starts, switch on Q5，this UPS unit will operate together with
other UPS units normally.
8.5.5 Emergency shutdown
In parallel operation system, if only one UPS unit needs to be shut down, the user
should press the “emergency shutdown” button on this UPS unit. If all the UPS
units need to be shutdown, connect all the “emergency shutdown” dry contacts of
the UPS units together and set up a “emergency shutdown” button for the whole
system. But the UPS units should be repaired separately. The operation procedures
are given in Chapter 6.
Method of setting up a “emergency shutdown” button for the whole system
A isolated multi-branch button should be used as emergency shutdown button,
pressing this button can switch off multi UPS units at the same time. The method is
shown in Fig. 8-6. That is, connect the control cables from the J12(pin 1 is normally
closed contact, pin 2 is central contact and pin 3 is the normally open contacts,
select the normally open and normally closed contacts according to control mode)
on the ULW2L61U2 board to the switch of the “emergency shutdown” button. In
order to avoid EMI, the EPO(emergency shutdown) cables must be shielded and
the shielded cables must be grounded at the EPO switch.
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Chapter 8 Parallel System
This figure only shows the connection method of control cables of parallel operation
system with 3 UPS units. The others can be done according to the same methods.
1 2 3 4
1 2 3 4
Emergency stop button
1 2 3 4
Fig. 8-6 Emergency shutdown button
Where, “1”-Normally closed contacts for emergency shutdown
“2”- Central contacts for emergency shutdown
“3”- Normally open contacts for emergency shutdown
“4”- Normally closed contacts for common alarm
8.5.6 Fault and Fault Process Methods
The faults of single module UPS system is given in Chapter 7. The faults that
specially belong to the parallel operation system are given in Table 8-3. If some
UPS unit has fault, it can exit the system and other units can maintain the normal
operation mode. But redundancy is not available, so the faulty UPS unit must be
repaired as soon as possible.
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Chapter 8 Parallel System
Table 8-3 Fault and fault process methods of parallel operation system
No. Fault description
Reasons
Fault processing
Disconnect the load of low priority,
maintain the power supply to important
load
Overload of parallel Overload occurs and the
1
operation system
redundancy is not available
In parallel operation system,
some UPS unit may require
to transfer to bypass due to If the parallel operation system
surge or overload, other transfers to bypass mode, and the
units will transfer to bypass operation condition enables, all the
after receiving the signal UPS units can recover to normal mode
sent by this UPS unit that synchronously.
Single module UPS
system requires to
transfer to bypass
mode
2
requires to transfer to
bypass mode
The load current of each
UPS unit is noticeably
Notify the service dept for repairing
unbalanced, thus the system
3
4
Load sharing fault
loading ability is affected.
Parallel
operation
The board is damaged.
Notify the service dept for repairing
board fails
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Chapter 9 Optional Parts
Chapter 9 Optional Parts
9.1 Battery
9.1.1 Capacity selection
Calculate the discharging current according to rated load capacity and then select
the battery according to the current and the battery backup time required by user.
There are various specifications of battery, we recommend that 30 12V battery cells
should be connected in series to form a battery string. The capacity of battery cell
can be 38Ah, 65Ah and 100Ah.
ꢀ Note
If the battery capacity exceeds 100Ah，the user should connect the battery of
same model and same capacity in parallel or use large capacity 2V battery to make
up the battery group.
The capacity data of battery string are listed in Table 9-2 and the capacity data are
selected according to rated load. Select the battery of 70%~100% rated capacity
according to the actual load and required backup time.
Table 9-1 Battery capacity equipped for single UPS (Ah，25℃)
UPS
20kVA
50A
30kVA
75A
40kVA
100A
60kVA
150A
capacity
Discharging
current
Backup time
Battery capacity（Ah）
15min
30min
1h
38
65
100
100
180
340
420
510
630
680
840
100
150
340
420
630
680
840
1020
1260
65
65
100
150
200
250
340
340
420
130
200
340
340
420
510
630
2h
3h
4h
5h
6h
8h
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Chapter 9 Optional Parts
9.2 Battery cabinet
9.2.1 External Dimensions
The UPS system has two kinds of battery cabinets that are UF-B0100-30 and UF-
B0065-30 respectively. The External Dimensions are given in Fig. 9-1 and Fig. 9-2
respectively. The structural parameters are given in Table 9-3.
Table 9-2 structural parameters
Size when
opening front
door(mm)
Angle of opened Ventilation Weight Weight(including
Height Width Depth
Name
door(degree)
channel
(mm)
(kg)
battery (kg)
(mm)
(mm)
(mm)
UF-B0065-30
UF-B0100-30
150
°
1400
1800
850
800
800
620
660
500
500
150
150
850
150°
1000
1350
Select the support rack and floor with proper bearing ability because the battery
cabinet is rather heavy after being filled with batteries.
Fig. 9-1 Outline of battery cabinet
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Chapter 9 Optional Parts
4 fixing holes
4 fixing holes
4 levelling bolts
4 levelling bolts
Fig. 9-2 Positions of leveling feet of battery cabinet
9.2.2 Installation of battery cabinet
The requirements for the locations of battery cabinet are the same with those of
UPS cabinet, so are the installation and fixing methods. Install the cabinet with
reference to the Fig. 9-1 and 9-2 and Fig. 2-5.
The battery cabinet exerts its weight on the floor through four leveling bolts(40mm
diameter). If the load bearing capacity of the floor is inadequate, add auxiliary
equipment to distribute the weight over a larger area, such as a big iron sheet or
increasing the number of supporting castor wheels.
The cabinet has flexible top and bottom cable access mode.
9.2.3 Wiring of the batteries
The front and back door, the cover board and each separation board should be
removed when installing the batteries. The installation should start from bottom to
up. The battery terminal should be bound with insulation tape after finishing the
wiring.
Fig. 9-3 shows the layout of the battery with the UF-B0100-30 battery cabinet as an
example. The installation of UF-B0065-30 is the same with UF-B0100-30, the
following contents may not be suitable for installation if different batteries are used
because the direction and wiring method of the battery are different.
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Chapter 9 Optional Parts
Layout for No.2~4 floors
General Layout
Layout for No.1 floors
Fig.9-3 Battery layout inside battery cabinet
UF-B0100-30 can hold 30 12V/100Ah maintenance free batteries. The voltage can
be 360V after the batteries are connected in series. The batteries are placed in 4
floors as shown in Fig.9-4.
Follow the steps below to connect the batteries between different floors and
connect the battery switch:
Front view
30 12V battery cells
output
switch
filter inductor
Fig. 9-4 Wiring of the batteries inside the UF-B0100-30 battery cabinet
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Chapter 9 Optional Parts
a. Unpack the battery, measure the battery voltage, charge the battery before
installation if the single battery cell voltage is lower than 2.13V(each battery has
6 cells, 12.8Vdc);
b. Open the front door, remove the back door and cover, switch off all the battery
switches, clear the battery cabinet and take out the accessories(battery
connection cables, cable sleeves and nylon fastener)inside the cabinet;
c. Install the 6 batteries at the bottom floor of the battery cabinet;
d. Connect the battery connection cables D(4 cables), cable E(1 cable) that
connects output switch and inductor, cable C (1 cable) that connects the
inductor and the first battery(front view) in right side. Connect the cable B(1
cable)between different floors and bound one end of the cable with insulation
tape，the other end of the cable should be connected to negative pole of the
battery at the rear part of the floor;
e. When selecting the temperature compensation function, fix the temperature
sensor TMP12Z(one of the accessories of battery cabinet) on the board where
the battery circuit breaker is installed, bound the signal cables and lead the
cables to the place where the wiring is convenient;
f. Place the 8 batteries on the second floor, connect the connection cables D (7
cables) between the batteries. The connection cables of the first floor will be
connected to the positive pole of the first battery in the left side of second floor.
One end of the connection cable B(1 cable) is bound with insulation tape, the
other end is connected to the negative pole of the battery in the left rear part;
g. The wiring and layout of batteries in third and fourth floors are the same with
that in second floor;
h. After connecting and installing the batteries in third and fourth floors, connect
one end of the cable A (1 cable) to output switch, and another end to the
negative pole of the battery in left rear part;
i. Install the cover board, front and back doors.
j. Connect the cables between the UPS and battery switch and the temperature
detection cables that should be shielded cables and should be bound together
with power source cables.
k. There are two kinds of installation methods if the UPS needs to be equipped
with large capacity batteries：The first one is to connect multi strings of
batteries of same capacity (lower than 100Ah) in parallel, and use the above
methods to install the batteries. The output cables of each battery cabinet are
connected to the battery terminals of UPS. The method is used if the required
backup time is shorter than 2 hours；The second method is to select high
capacity 2V battery. The battery cabinet and connection copper bars are
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Chapter 9 Optional Parts
provided by battery manufacturer. The battery output circuit breaker should be
made separately. The method is used if the required backup time is longer than
2 hours.
l. The connection cables between battery and UPS will not be provided in
accessories. Refer to Table 3-2 in Chapter 3 to select the battery cables.
9.3 SNMP Card and the Software
UPS SNMP card UF-SNMP111 is inserted into the slot for SNMP card in the UPS.
The card enables the remote management of the UPS via network.
SNMP card is compatible with 10M/100M ether net and support the SNMP, HTTP,
TFTP, TELNET and TTY protocols. The immunity satisfies the IEC 1000-4-2.3.4
LEVER III . The conduction of radiation satisfies CISPR 22 CLASS A standard. Hot
swappable design enables quick and convenient maintenance. It can access to
network management system via MIB, and is able to monitor the UPS via IE. It is
also a part of centralized monitoring system.
9.3.1 Product structure and ports
Fig.9-5 SNMP structure
The ports and functions of SNMP card are given in Table 9-4.
Table 9-3 Ports and functions of SNMP card
Serial No.
1
Name
Functions
RJ45 port
Status indicator(green)
Connect to network cables
Indicate the operation states of SNMP card
2
3
4
Network indicator(yellow) Indicate the network connection and communication
status
SNMP card
Inserted into UPS and used for UPS connection
9.3.2 Technical features
Compatible with 10/100M either net, the SNMP card can adapt to 10M and 100M
ether net automatically and can realize the smooth connection from 10M to 100M;
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Chapter 9 Optional Parts
Support SNMP, HTTP, TFTP and Telnet protocols and can monitor the UPS through
the UPS network monitoring software (UPSiteCenter), NMS and Web explorer（IE
and Netscape）. The SNMP card can be upgraded online;
Provide the computer safety protection functions. Provide the computer safety
shutdown software for Windows, UNIX and Linux together with SNMP card. In case
of utility source abnormal and battery depletion, the shutdown software will shut
down the computer to protect it.
Easy installation and maintenance: Hot swappable design enables the replacing of
UPS unit without shutting down the power.
ꢀ Note:
Please check the directions of SNMP card for detailed explanations.
9.4 Network Software
UL33 UPSiteCenter network monitoring software UF-WIN210N can monitor up to
60,000 UPS units and can manage the UPS units level by level with the following
functions:
a. Real time data display;
b. Inquire and print the historic log（including historic data, historic event and
historic control）;
c. Remote control, remote adjusting and remote measuring; Schedule and
mission processing, user management and safety management;
d. Alarm notification through BP and EMAIL.
Centralized monitoring software needs the support of SNMP card. Each UPS
should be installed with a SNMP card to make itself be a node in the network
before starting monitoring through WAN.
9.5 MODEM
UPS monitoring system enables the flexible application of MODEM, so the remote
management functions can be realized. The typical application methods are given
below:
a. Use a MODEM to connect the user’s host computer to the internet through
public telephone network to realize remote management functions;
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Chapter 9 Optional Parts
b. Set up the fault call-back parameters. The monitoring system can realize fault
call-back functions through the MODEM. When the UPS has fault, it will dial the
user automatically and require actions.
9.6 Temperature sensor TMP12Z
TMP12Z temperature sensor is an ambient temperature detection device
developed by Avansys. Its operation voltage is 12V, the detected temperature
range is 0~100℃, and output signal is 1~5V.
Fig.9-6 shows the structure of temperature sensor and meanings of output
terminals.
fixing terminal
Fig.9-6 TMP12Z Temperature sensor
The meanings are given below:
Fixing terminal: Use M4~M6 screws to fix the temperature sensor;
VCC: Positive pole of power source of temperature sensor, and generally it is 12V;
GND: GND pole of power source of temperature sensor, and generally it is 0V;
Vout: Output terminal of temperature sensor and the output signal varies between
1V and 5V with the varying of temperature in the range of 0~100℃;
9.7 Level C Lightning Protection System SPD24Z
Level C Lightning Protection System SPD24Z used for SPD-24-UPS can be used
to protect the input power source of machine room to prevent the external lightning
surge from entering the machine room. SPD24Z should be selected if no lightning
protection system lower than level C is equipped in the power distribution system,
or the machine room is far away from the power distribution system, or the machine
room is in area where the lightning or thunder frequently happens.
The capacity of the Level C lightning protection device is 20kA，the maximum
value is 40kA(can only be used one time)，and the surge current is 8/20us.
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9.7.1 Introduction of SPD24Z
The SPD24Z lightning protection box has a switch(3) on its panel, a lightning
protection indicator(green, 1) and fault indicator（red,2）. Its top cover has 3 holes
for cable input（I～III） and its bottom has 3 holes for cable output. Its rear side
has two holes for fixing the device, as shown in 9-7.
Panel
Back
Top
Figure 9-7 Outline of SPD24Z
9.7.2 Installation procedures of SPD24Z
Procedures:
a. Use too expansive bolts smaller than Φ10 to fix the lightning protection box on
the wall through fixing holes;
b. The cross sectional area of input and output cables of the lightning protection
box should be at least 6mm and copper-core cables are recommended to be
used;
c. The cooper-core cable with 10mm cross sectional area should be used for
protective earth cable（PE cable）, and the minimum area should be at least
6mm;
d. Th earthing resistance should be less than 5 ohm;
e. The SPD24Z should be fixed in proper location in the room. The AC power
cable between the lightning protection device and the equipment should be 5～
10m;
f. Open the panel of the lightning protection box, wire according to the figure
printed on the rear side of the panel and Fig 9-8;
g. Switch on the circuit breaker after confirming that all the cables are well
connected. Check whether the green indicator illuminates. The red indicator
should turn on if the circuit breaker is switched off.
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h. Check whether the cables are well connected.
i. Use a 4mm2 cable to earth the lightning protection device.
j. Close the cover.
ꢀ Note
1. All operations should be done with power off and confirm there is no dangerous
voltage on the neutral line。
2. Connect two pieces of PE cables from the lightning protection device. One cable
is connected to the case of the UPS, the other one is connected to earth（shorter
than 30m, as short as possible）.
3. After installation, switch on the circuit breaker of the lightning protection device,
then the device is in normal operation state. If the circuit breaker is switched off,
there will be no lightning protection functions. The circuit breaker is prohibited to be
switched off during normal operation of the lightning protection device。
M
Equipment
User
Protection Earth
earthing
bus bar
Fixing holes
lightning
protection box
wiring diagram
circuit breaker
capper bar
Fig. 9-8 SPD24Z wiring
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Chapter 9 Optional Parts
9.7.3 Using and Maintenance
1. Ambient condition
a. Ambient temperature ranges from -40℃to 40℃;
b. Elevation lower than 1000m;
c. The utility frequency is 45～65Hz;
d. The highest wind speed not exceed 35m/s.
2. Maintenance
1) The lightning protection device operates normally if the green indicator
illuminates while the red indicator is off;
2) If the green indicator is off while the red indicator illuminates, that means the
circuit breaker is switched off. If the circuit breaker is not switched off manually,
please check the varistor. The lightning protection device is damaged if the
varistor turns into red. At this time the device must be replaced;
3) If the green indicator and the red one are all off, that means the lightning
protection device is damaged, please notify our service engineers for repairing;
4) If the PE cables must be disconnected due to certain reason, please switch off
the lightning protection device first to let the device de-energized. Be sure to
confirm that whether the neutral cable has hazard voltage;
5) Please refer to Using Directions of SPD24Z for details.
9.8 Bypass Isolation Transformer
Specifications:
Input voltage: 380/400/415V, three phases;
Output voltage: 380/400/415V, three phases;
Rated frequency: 50Hz;
Rated capacity: 20/30/40/60kVA
Insulation level: F;
Wiring: Y/Y
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Chapter 10 Service after Sales
Chapter 10 Service after Sales
10.1 Abnormal Fault Handling
If the UPS is abnormal without alarm indication, check according to Table 10-1.
Table 10-1 Fault handling
No.1
1
Fault description
Reason
Actions to be taken
Check the input voltage
A. Input power is
Utility switch is put to
“ON”, no display by LCD,
no self test of system
disconnected from system
B. Input under voltage
UPS has no output power Output power cables are not
2
3
Check the output cables
Contact the distributor
and no alarm
well connected
Abnormal sound and smell UPS has internal fault
When the UPS is abnormal with visual/audible alarm, check the LCD display first
and then process the fault according to Table10-2.
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Table 10-2 Fault information of Single module UPS system
No.1
1
Fault description
Reason
Actions to be taken
Ambient over-temperature over-temperature of UPS room
Check the ventilation
Environment parameter 1 Environment parameter channel 1 Check the devices relating to the
abnormal has alarm channel
2
3
4
5
6
Environment parameter 2 Environment parameter channel 2 Check the devices relating to the
abnormal has alarm channel
Environment parameter 3 Environment parameter channel 3 Check the devices relating to the
abnormal
has alarm
channel
Environment parameter
abnormal
12V
environment
parameter Check the devices relating to the
channel
channel has alarm
Rectifier input voltage
abnormal
Line-to-neutral voltage of rectifier Check the input line-to-neutral voltage
exceeds normal operation range amplitude of rectifier
Line-to-neutral voltage of rectifier Check the input line-to-neutral voltage
lower than 305V, but higher than amplitude of rectifier
208V
Rectifier input under-
voltage
7
Rectifier’s input voltage Rectifier frequency exceeds the Check the rectifier’s input voltage
8
9
frequency is abnormal
normal range
frequency
Input fuse blows
Rectifier input fuse blows up
Notify the service dept for repairing
Input transformer over
temperature
Temperature of input transformer Check the ambient temperature and
is too high ventilation
10
Input phase rotation
Reverse
Rectifier’s input phase rotation is Notify the UPS service engineer, check
reverse the wiring of rectifier input cables
11
Bypass voltage or frequency is Check the bypass voltage and
out of normal range and inverter frequency
output is not synchronized with
12 Bypass unsynchronized
the bypass output.
Bypass voltage or frequency Check the bypass voltage and
Bypass ratings exceed the exceeds the normal range and frequency
13
14
15
normal range
the bypass will not power the load
anymore.
If the over current time exceeds Check the load, if it is normal, then
the limit, the UPS may shut down restart the UPS
the bypass and the inverter.
Bypass over current
timeout
When the overload time is due in Repair the bypass and reduce the load,
inverter mode, if at this time the and then restart the UPS. Note: Don’t
bypass has fault, then the inverter let the UPS in over load state for a long
Shutdown due to bypass
fault
is shut down.
time.
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Chapter 10 Service after Sales
Reason
No.1
16
Fault description
Actions to be taken
The battery life is reduced due to
aging, which may endanger the
normal operation of UPS. Warn
the user that the battery is
abnormal and needs to be
replaced.
Notify the service dept for replacing the
battery and set the battery model and
parameters through software.
Battery needs to be
replaced
Batteries are not connected.
Check the battery and the wiring of
batteries
17 No battery
The battery discharges to pre-
alarm point（the battery capacity
Pre-alarm for end of
battery discharging
18
Shut down the load in time
is inadequate
the system may
），
shut down after a few minutes
Check the battery temperature and
ventilation
19 battery over temperature
20 battery self-test is disabled
battery temperature is too high
The battery condition for self-test Start the self test after the conditions
is not satisfied
can meet the requirements
Battery is connected
Notify the UPS service engineer to
connect the battery again
21
Battery is connected reverse
reverse
Bypass phase rotation is Bypass phase rotation is reverse Notify the UPS service engineer to
reverse change the bypass phase rotation
22
23
Rectifier heatsink over Rectifier heatsink temperature is The UPS can recover automatically.
temperature
too high
Check the environment and ventilation
Replace the fan in time and the UPS
can recover automatically
24 Rectifier fan fails
Rectifier fan is abnormal
Check if the bypass is normal. The fault
alarm stops automatically after the
bypass recovers normal
Inverter is asynchronous with
bypass
25 Inverter asynchronous
Inverter heatsink over Inverter heatsink temperature is The UPS can recover automatically.
26
temperature
too high
Check the environment and ventilation
Replace the fan in time and the UPS
can recover automatically
27 Inverter fan fails
Inverter fan is abnormal
The IGBT of inverter has over Restart the inverter, if the fault can’t be
current resulting in the shut down cleared, notify the service dept for
28 Inverter over current
if inverter.
repairing.
Check whether there is fault in rectifier
Shutdown due to low bus DC bus voltage is too low result in side, if no, then check whether
29
30
voltage
the shutdown of inverter
overload occurs. Restart after clearing
the fault.
Output transformer over Output transformer temperature is Auto recovery, ambient and ventilation
temperature
too high
of UPS should be checked.
Disconnect unnecessary load and
ensure the safety.
31 Overload of single UPS
32 Overload of system
Load is too heavy
Disconnect unnecessary load and
ensure the safety.
System load is too heavy
Overload exceeds normal Over load occurs in inverter If the load decreases after 5 minutes,
time mode, transfers to bypass mode the system will back to inverter mode
33
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Chapter 10 Service after Sales
Reason
No.1
Fault description
Actions to be taken
Surge current occurs in bypass Avoid applying big load abruptly and
34 Output surge current
mode, the system shutdown
short circuit
The system transfers to bypass
Transfer to bypass due to mode due to surge current and Avoid applying load abruptly and the
35
36
surge
back to inverter mode after load is UPS can recover automatically
decreased
In parallel operation system,
some UPS module may require to
If the parallel operation system
transfer to bypass due to surge or
transfers to bypass mode, and the
overload, other modules will
operation condition enables, all the
transfer to bypass after receiving
UPS modules can recover to normal
the signal sent by this UPS
mode synchronously.
Neighbouring UPS module
requires to transfer to
bypass mode
module that requires to transfer to
bypass mode
Wrong operation such as start the
Operate with reference to User’s
UPS with the maintenance
Manual
37 User’s wrong operation
bypass switched on
The actual transfer times Transfer times exceed the times
exceed the permissible set by background. The system
38
Avoid frequent overload
transfer times per hour
will stay in bypass mode until next
hour.
10.2 Warranty
We provide 1 year of free service for our UPS (including the battery).
The above warranty shall not apply in the following circumstances:
The battery is provided by user;
Damage resulting from operation not in accordance with the user manual;
Damage as a result of fire, flood, etc.;
Different levels of customized service packages are available with reasonable
charge, including responsive, preventive maintenance, warranty period extension,
etc. For detailed information, please contact the distributor or the local technical
support center.
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