EATON ETN1000 / ETN2000
Grid PV-Inverter
Installation and Operation Manual
Version 1.6 E 2010.06
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Before you start…....................................................................................................3
Safety instructions...................................................................................................4
Limited Warranty.....................................................................................................6
Overview.........................................................................................................7
Features..........................................................................................................8
Installation instructions.................................................................................9
Opening the package ...............................................................................9
Before installation.....................................................................................9
Checking.................................................................................................16
System Diagram...........................................................................................17
Operating Your PV-Inverter.........................................................................18
Modes of operation.................................................................................18
LED.........................................................................................................19
Function Key...........................................................................................19
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Front Panel.............................................................................................20
6. Inverter Status..................................................................................................24
Display information.................................................................................24
7. Communications..............................................................................................27
8. Trouble shooting..............................................................................................29
9. Specifications...................................................................................................31
Electrical.................................................................................................31
Edition 1.6E, 2010/06
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Before you start…
Congratulations on choosing EATON ETN1000 / ETN2000 Grid PV-Inverter,
a product from EATON Grid PV-Inverter is a highly reliable product due to its
innovative design and perfect quality control. Such an inverter is used in
high demand, grid-linked PV systems.
This manual contains important information regarding
installation and safe operation of this unit. Be sure to read this
manual carefully before using.
If you encounter any problems during installation or operation of this unit, first
check this manual before contacting your local dealer or representative.
Instructions inside this manual will help you solve most installation and
operation difficulties.
Thank you again for choosing our product. Please keep this manual handy
for quick reference.
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Safety instructions
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Risk of Electric Shock
1. Do not remove the casing. Inverter contains no user serviceable parts.
Refer servicing to qualified service personnel.
Both AC and DC voltage sources are terminated inside the PV-Inverter.
Please disconnect these circuits before servicing.
2. When a photovoltaic panel is exposed to light, it generates a DC voltage.
When connected to this equipment, a photovoltaic panel will charge
the DC link capacitors.
3. Energy stored in this equipment’s DC link capacitors presents a risk of
electric shock. Even after the unit is disconnected from the grid and
photovoltaic panels, high voltages may still exist inside the PV-Inverter.
Do not remove the casing until at least 30 minutes after disconnecting
all power sources.
4. This unit is designed to feed power to the public power grid (utility) only.
Do not connect this unit to an AC source or generator. Connecting
Inverter to external devices could result in serious damage to your
equipment.
5. Carefully remove the unit from its packaging and inspect for external
damage. If you find any imperfections, please contact your local
dealer.
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Hot surfaces
Although designed to meet all safety requirements, some
parts and surfaces of Inverter are still hot during operation.
To reduce the risk of injury, do not touch the heat sink at the back of the
PV-Inverter or nearby surfaces while Inverter is operating.
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Limited Warranty
Inverter comes with a limited warranty. This warranty includes all defects of
design, components and manufacturing. Excluded from warranty are
damages due to:
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Breaking the product seal (opening the casing)
Improper transportation and delivery
Unqualified persons opening the unit
Improper installation
Unauthorized modification, testing or repairing
Use and application beyond the definition in this manual
Application beyond the scope of safety standards
Acts of nature such as lighting, fire, storm etc.
The right to repair and/or replace the unit is at the manufacturers’ discretion.
Any damages discovered during installation should be submitted via a
written damage report within 5 working days of receiving the PV-Inverter.
Otherwise EATON is not responsible for damages beyond the scope of this
warranty.
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2. Features
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Very high conversion efficiency (up to 96%)
MPPT (Maximum Power Point Tracking)
Higher power capacity than similar products of the same size.
Embedded LCD display showing complete status information
Natural convection cooling. Quiet, fan-less design
Stylish, modern casing
Compact, small profile
High reliability, and Easy to install
Maintenance free
Standard RS-232, optional RS-485 and others
No external GFCI breaker is required
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3. Installation instructions
Opening the package
After opening the package, please check the contents of the box. It
should contain the following:
1. One Inverter
2. One Instruction manual
3. One mounting frame
4. 4 mounting screws
5. 2 safety-lock screws
6. One cable gland and TB cover for AC cable
Before installation
Before starting installation please consider the following items:
This unit is designed for indoor usage. Do not expose the unit to
wet, or moist conditions.
Do not expose the PV-Inverter to direct sunlight. Direct sunlight
increases the internal temperature that may reduce conversion
efficiency.
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Check the ambient temperature of installation is within specified
range -20 ~ +55°C.
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The AC grid voltage is between 206 and 264VAC, 50/60Hz.
Electric utility company has approved the grid connection.
Qualified personnel are performing the installation.
Adequate convection space surrounds the inverter.
Inverter is being installed away from explosive vapors.
No flammable items are near the inverter.
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Inverter can be installed and operated at locations where the ambient
temperature is up to 55°C. However, for optimal operation, it is
recommended that Inverter is installed where the ambient
temperature is between 0~40°C.
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Mounting Inverter to the wall
1. Select a wall or solid vertical surface that can support the PV-Inverter.
2. Inverter requires adequate cooling space. Allow at least 20cm space
above and below the inverter.
3. Using the mounting frame as a template, drill 4 holes as illustrated in the
following figures.
4. Fix the mounting frame as the
figure shows.
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5. Hang the inverter on the mounting frame
Select the installation location so that the status display can be easily viewed.
Choose a strong mounting wall to prevent vibrations while inverter is
operating.
6. Check the installation conditions
a) Do not install the PV-Inverter on a slanted surface
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b) Check the upper straps of PV-Inverter and ensure it fits on to the
bracket
c) Insert safety-lock screws to the bottom leg to secure the inverter
Check the secure mounting of the PV-Inverter by trying to raise it
from the bottom. The PV-Inverter should remain firmly attached.
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Connecting to the grid (AC utility)
1. Measure grid (utility) voltage and frequency. It should be 230VAC (or
220VAC), 50/60Hz, and single phase.
2. Open the breaker or fuse between PV-Inverter and utility.
3. For Inverter, connect AC wires as
follows:
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Insert utility wires through cable gland.
Connect wires according to polarities
indicated on terminal block. L → LINE
(brown), N → Neutral (blue) and →
system ground (green).
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Fasten the gland plate in order to make sure cable is firmly fixed.
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Twist the gland, attached screws in order to seal the AC gland cover.
To prevent risk of electric shock, ensure the ground wire is properly
earthed before operating the PV-Inverter.
4. Suggested cable width for AC wire.
Diameter φ
Model
Area (mm2)
AWG no.
(mm)
EATON ETN1000
EATON ETN2000
≥1.02
≥1.25
≤16
Connect to PV Panel (DC input)
1. Make sure the maximum open circuit voltage (Voc) of each PV string is
less than 500VDC UNDER ANY CONDITION. We recommend Voc less
than 360VDC with ambient temperature of 25°C.
2. Use MC (Multi-contact®) connectors for PV array terminals.
3. Connect the positive and negative terminals from the PV panel to
positive (+) terminals and negative (-) terminals on the PV-Inverter.
Each DC terminal on Inverter can withstand up to 5ADC in 1.0kW and
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10ADC in 2.0kW.
Before connecting PV panels to DC terminals, please make sure the
polarity is correct. Incorrect polarity connection could permanently
damage the unit.
Please check the short-circuit current of the PV string. The total short-circuit
current of the PV string should be less than the inverter’s maximum DC
current.
High voltages exist when the PV panel is exposed to the sun. To
reduce risk of electric shock, avoid touching live components and
treat connection terminals carefully.
Checking
1.
When the PV panels are connected and their output voltage is greater
than 100 VDC but the AC grid is not yet connected, the message on the
LCD display produce the following messages in order: “MODEL” ->
“Waiting” -> “No Utility”. The display repeats “No Utility” and the RED
“fault LED” turns on.
2.
3.
4.
Close the AC breaker or fuse between PV-Inverter and grid. The
normal operating sequence begins.
Under normal operating conditions the LCD displays “Pac=xxxx.xW”.
That is the power fed to the grid. The green LED turns lights-up.
This completes the check.
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4. System Diagram
The typical connection diagram for the entire PV system is shown in the
following figure.
Utility
Connection
system
+
-
PV panel
1.
2.
PV Panel: Provide DC power to inverter.
EATON ETN1000 / ETN2000 PV Inverter converts DC (Direct Current)
power from PV panel(s) to AC (Alternating Current) power. Because
Inverter is grid-connected it controls the current amplitude according to
the PV Panel power supply. Inverter always tries to convert the
maximum power from your PV panel(s).
3.
4.
Connection system: This “interface” between Utility and PV-Inverter
may consist of electrical breaker, fuse and connecting terminals. To
comply with local safety standards and codes, the connection system
should be designed and implemented by a qualified technician.
Utility: Referred to as “grid” in this manual, is the way your electric
power company provides power to your place. Please note that
Inverter can only connect to low-voltage systems (namely, 220,
230VAC, 50/60Hz).
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5. Operating Your PV-Inverter
Modes of operation
There are 3 different modes of operation.
1. Normal mode: In this mode, Inverter works normally. Whenever the
supplied power from PV panel is sufficient (voltage>150VDC), Inverter
converts power to the grid as generated by the PV panel. If the power is
insufficient, (voltage<100VDC) Inverter enters a “waiting” state. Whilst
“waiting” Inverter uses just enough power from the PV panel monitor
internal system status. In normal mode the green LED is on.
2. Fault mode: The internal intelligent controller can continuously monitor
and adjust the system status. If Inverter finds any unexpected
conditions such as grid problems or internal failure, it will display the
information on its LCD and light up the red “Fault” LED.
3. Shutdown mode: During periods of little or no sunlight, Inverter
automatically stops running. In this mode, Inverter does not take any
power from the grid. The display and LED’s on the front panel do not
work.
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Front Panel arrangement
Function Key
LCD (Liquid
Crystal Display)
Power-on LED
Fault LED
Pac=xxxx.xW
LED
There are 2 LED’s on Inverter, one is green and the other is red.
Normally, only the green LED switches on during operation. Their
indicated status is explained as follows:
1.
Power on (green LED): It lights to indicate that Inverter is running.
2.
Fault (red LED): Illuminates during a “fault” or “failure”. Details of
possible faults and their solutions can be found in Chapter
6,”Inverter Status”.
Function Key
Function Key is a key on PV-Inverter which can be pressed so as to
rotate between each menu.
Accuracy of the reading
Normally, the accuracy of LCD reading is around ±2%. In all ranges of
operation, the accuracy is up to ±5%.
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Front Panel
Operating Inverter is quite easy. During normal operation, Inverter runs
automatically. However, to achieve maximum conversion efficiency of
Inverter, please read through the following information:
1.
Automatic ON-OFF: Inverter starts up automatically when DC-power
from the PV panel is sufficient. Once the PV-Inverter starts it enters
one of the following 3 states:
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Standby: The PV string can only provide just enough voltage to
minimum requirements of the controller.
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Waiting: When the PV string DC voltage is greater than 100V,
Inverter enters a “waiting” state and attempts to connect to the
grid.
Normal operation: When PV string DC voltage is greater than
150V, Inverter operates in the normal state.
Model
In this state, it feeds power to the grid.
Inverter automatically stops when the PV power is
not enough.
Waiting
2.
3.
Starting-up display sequence: Once the PV power
is sufficient, Inverter displays information as
shown in the flow chart to the right.
Checking= xxxS
Normal State
Pac =xxxx.xW
Change display information: During normal
operation, LCD shows the detail of PV-Inverter.
On the other hand, the display is setup to
automatically indicate the supplying power to the
grid. Each subsequent press changes the display
by press the “Function” key on the front panel.
Hold display: If you want to hold a specific display.
Information during
start-up
4.
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Repeatedly press the function key until the desired display is reached.
Release the key and press again for more than 2 second until you see
“Lock”, release the key; the information remains on the display. To
change the display again, please press the key as indicated in above
section 3. Change display information.
5.
6.
LCD backlight control: To save power, the LCD display’s backlight
automatically turns off after 10 seconds. To enable it, press the
“Function” key again.
Contrast control: A natural phenomenon of LCD displays is the
background color is darker at higher temperatures. At higher
temperatures, the characters may not be easily identified. In this case,
the adjust the contrast as follows:
a. Press the “Function” key repeatedly until
Contrast
“Contrast” shows in the display.
b. Hold the “Function” key down for more
Set Contrast
than 2 seconds, until display shows “Set
contrast” and a bar graph on the right.
Lighter
Darker
Done
Set Contrast
Set Contrast
c. Press the “Function” key repeatedly until
the display’s contrast is acceptable.
d. Release the key for more than 10 seconds,
the display will show “Pac =xxxx.xW”.
e. Setting completed.
Pac =xxxx.xW
Contrast setup
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LCD Display Sequence:
Feeding
Model name
FW version
Pac =xxxx.xW
Model
A1.00
Daily energy
Total energy
Etoday=xxx.xxKWh
Operating status
Contrast Adj.
Set language
Eac=xxxxxxkWh
Vdc=xxx.xV
Normal state
Contrast
DC-PV voltage
Feeding current
AC-Grid freq.
Iac= x.xA
Set language
AC-Grid voltage
Frequency=xx.xHz
Vac=xxx.xV
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Maximum Power Point Tracking (MPPT)
IPV (A)
PPV (W)
A good PV inverter must be
able to convert the maximum
power from any PV panel. Due
to its advanced design, Inverter
PV-Inverter can track the
Maximum power point
1000W/m2
@ 1000W/m2~ 120W
125
100
75
5
4
3
2
1
800W/m2
600W/m2
50
maximum power from your PV
panel in any condition. When the
displayed power on the LCD
output does not change
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UPV (V)
50
0
10
20
30
40
dramatically, inverter is converting the maximum power from panels.
When the LCD power reading is significantly changes, Inverter is
tracking the power according to the varied sunlight.
When the PV panel’s output is low, the feeding DC-power may
drift slowly as does the AC power. It is because PV-Inverter is
tracking maximum DC-power continuously.
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6. Inverter Status
Inverter is designed to be user-friendly. Therefore, the status of the Inverter
can be easily understood by reading the information that shown on the front
panel display. All possible messages are shown in the following table.
Display information
Operating conditions
Normal Working Status
Power off
In English
Description
No display
Standby
PV inverter is totally shutdown, VPV <70V
70V≦ Input voltage <100V
Standby
Input voltage range 100~150V during
start-up. After PV voltage is higher than
100V, inverter is waiting for feeding to grid
Initialization & waiting
Check grid
Waiting
When PV voltage> 150V, inverter is
checking feeding conditions
Checking xxxS
Normal
Inverter is feeding power. After 10 seconds
of this display, LCD will show wattage.
Feeding grid, MPPT
FLASH
FLASH
FLASH firmware
Monitoring Parameters
Instantaneous Output power
Pac =xxxx.xW
Eac=xxxxxxkWh
Vac = xxx.xV
The real time output power in xxxx W
Accumulated energy
information
Total energy that has been fed to grid since
inverter was installed
Grid voltage
Grid voltage in xxx.x VAC
Grid frequency in xx.x Hz
Grid frequency
Frequency=xx.xHz
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Operating conditions
Feeding current
PV array voltage
Daily Energy
In English
Iac = x.xA
Description
Feeding current amount in xx.x A
Input voltage from PV array, xxx.x VDC
The accumulated kWh of that day
Vdc = xxx.x V
Etoday=xxx.xxKW
h
System Fault
Earth fault of the PV-panels or failure of
surge voltage protection
Isolation failure
Isolation fault
Ground I fault
Grid fault
Leakage current detected from ground
conductor is too high
GFCI active
Grid measured data is beyond the
specification (voltage & frequency)
Grid failure
No utility
No Utility
Utility is not available
Input voltage is higher than the maximum
input voltage
Input voltage too high
Inverter Fault
PV over voltage
The readings of 2 microprocessors are not
consistent. It could be caused by CPU
and/or other circuit do not function well.
Consistent failure
Temperature too high
Output relay failure
Output DC injection too high
EEPROM problem
Consistent Fault
Over temperature
Relay Failure
The internal temperature of inverter is
higher than normal value
The relay between inverter and grid is not
functional
Output DC injection is higher than
expected
DC INJ High
EEPROM Failure EEPROM inside has data access problem
Communication failure
between microprocessors
The communication between MCU inside
SCI Failure
is abnormal
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Operating conditions
DC bus voltage is too high
DC bus voltage is too low
In English
High DC Bus
Low DC Bus
Ref 2.5V Fault
Description
The DC BUS voltage is higher than
expected
The DC BUS voltage is lower than
expected
2.5V reference voltage inside
problem
The 2.5V reference inside are abnormal
Output DC sensor abnormal
GFCI detection problem
System Information
DC Sensor Fault Detection of DC output sensor is abnormal
GFCI Failure
The GFCI detection circuit is abnormal
EATON ETN1000
/ETN2000
Model display
Inverter model, xkW inverter
LCD contrast
Contrast
Set Contrast
Lock
LCD contrast setting
LCD contrast setting
LCD display lock
Contrast setting of LCD display
Hold the present display message
The time that needs to reconnect grid
power
Waiting for reconnect to grid
Firmware version
Setting Language
Reconnect xxxS
Ver. xx.xx
F/W version information
Set Language
Set up of the display language
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7. Communications
Inverter is equipped with a powerful communications interface and options.
Use Inverter’s EZ control to monitor the status of your PV-Inverter. Also,
qualified personnel can upgrade the firmware using the RS232 port.
1. RS232: To use the RS232 port, remove the RS232 cover on the bottom
side of Inverter. It is a DB9 socket. The pin definition is
Pin
Functional Description
1
2
3
4
5
6
7
8
9
N.C.
TxD
RxD
N.C.
Common
N.C.
N.C.
N.C.
N.C.
N.C. means “No Connection”
2. Optional communications port: It is a powerful extension that can accept
a special card that designed for communication purpose such as RS485.
The RS485 card can be used to work with Inverter’s EZ logger as
multiple monitoring applications.
3. Firmware upgrade: To up-to-date keep the firmware, use the RS232
port and supplied program to upgrade firmware. To do this, please
contact EATON Customer Service.
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EATON Contact Information
Telephone: 1300 3 EATON
Web:
To prevent risk of damage it is recommended that only authorized
personnel perform firmware upgrades.
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8. Trouble shooting
In most situations, the Inverter requires very little service. However, if
Inverter is not able to work perfectly, please refer to the following instructions
before calling your local dealer.
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Should any problems arise, the red (Fault) LED on the front panel turns
on and the LCD displays the relevant information. Please refer to the
following table for a list of potential problems and their solutions.
Display
Possible actions
1. Check the impedance is between PV (+) & PV
(-) and the PV-Inverter is earthed. The
impedance must be greater than 5MΩ
2. If the problem persists please contact Eaton.
1. The ground current is too high.
Isolation Fault
2. Unplug the inputs from the PV generator and
check the peripheral AC system
3. After the cause is cleared, re-plug the PV panel
and check PV-Inverter status.
4. If the problem persists please contact Eaton.
1. Wait for 5 minutes, if the grid returns to normal,
PV-Inverter automatically restarts.
2. Make sure grid voltage and frequency meet the
specifications
Ground I Fault
Grid Fault
System
Fault
3. If the problem persists please contact Eaton.
1. Grid is not connected.
No Utility 2. Check grid connection cables.
3. Check grid usability.
1. Check the open PV voltage, see if it is greater
than or too close to 450VDC
2. If PV voltage is less than 450VDC, and the
problem still occurs, please contact Eaton.
1. Disconnect PV (+) or PV (-) from the input,
restart the PV-Inverter
Inverter
Failure
PV over
Voltage
Consistent
Fault
2. If it does not work, please Contact Eaton.
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1. The internal temperature is higher than
specified normal value
2. Find a way to reduce the ambient temperature.
3. Or move the inverter to a cooler environment
4. If it is not effective, please contact Eaton.
Over
Temperature
Relay Failure
DC INJ High
EEPROM
1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and
check again
4. If the message reappears, please contact
Eaton.
Failure
SCI Failure
High DC Bus
Low DC Bus
Ref 2.5V Fault
DC Sensor
Fault
GFCI Failure
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If there is no display on the panel, please check PV-input connections.
If the voltage is higher than 150V, call your local service.
During periods of little or no sunlight, the PV-Inverter may continuously
start up and shut down. This is due to insufficient power generated to
operate the control circuits.
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9. Specifications
Electrical
Model
EATON ETN1000
EATON ETN2000
Nominal AC power
Max. AC power
(in 10 minutes)
Input
1000W
2000W
1100W
2200W
Nominal DCV
Max. open DCV
MPPT range
Working range
Max. input current
Output
360VDC
500VDC
150 to 450VDC
100 to 500VDC
5ADC
360VDC
500VDC
150 to 450VDC
100 to 500VDC
10ADC
Operational voltage
Operational frequency
Current distortion
Power factor
206~264 VAC
206~264 VAC
49.25~50.75Hz
49.25~50.75Hz
<3%
>0.99
95%
<3%
>0.99
96%
Maximum η
93%
95%
European η
Environment
Protection degree
Operating temperature
Humidity
IP 43
-20 to 55ºC
0 to 95%, non-condensing
Heat Dissipation
Power consumption
Acoustic noise
Communication & Features
LCD
Convection
<7W
<35dBA
1-Line, 16 characters
RS232 standard, RS485 optional
Yes, via RS232
Comm. Interface
F/W upgrade
Mechanical
305x302x120
11.3
W×D×H (mm)
Weight (kg)
Normative references
Grid interface regulation
Safety
AS4777
AS3100
EMC: EMS/EMI
CE
EN 61000-6-2 (2005) / EN 61000-6-3 (2007)
LVD: 2006/95/EC EMC: 2004/108/EC
1
Regulation voltage range is 200~270 VAC according to AS4777.
Regulation frequency range is 45~55Hz according to AS4777.
2
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∗Product specifications are subject to change without notice
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