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The world's first EOCR
with built-in ZCT
(bottom hole & terminal type)
will save space, time and wiring through unique development design
during installation.
with compact size, possible to be applied to various panel size.
the protection function added for high groud fault current.
most suitable for low frequency circumstance (5Hz~, Inveter use)
can cover wide range current through product innovation,
so it leads to the decrease of customer's managing stocks and
simplicity of replacement.
Samwha EOCR has been developing the products only related to EOCR for
around 30 years, since established and now challenging the conquering of world
market with the real speciality for EOCR that other companies never have.
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Applications
Building
Industrial facilities
Petrochemical, electronic, glass, steel, semiconductor,
chemical, medicine, cement, paint
Office, commercial business, residence, school, hospital
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Control power
Rated current
●
●
24 VDC
Over current : 0.5~80A (Definite)
●
●
85~260 VAC/DC, 50/60 Hz
GF current : 0.03A~10A
●
5~200Hz Variable frequency
measurement
Composition by function
●
Earth Fault
Motor protection
●
i3BZ, iFBZ (with Modbus RS-485)
●
Thermal Overload
●
3BZ2, FBZ2 (without Modbus RS-485)
●
Over/under current
●
Stall/Jam
EF current
Phase loss/lmbalance
●
Contact contact
●
●
A-Type
●
95-96(b), 97-98(a) : OL
●
57-58(a) : GR
C-Type
Network communication
●
●
Modbus RS-485
●
95-96(b), 97-98(a) : OL/GR
07-08(a) : AL/UL/TO
●
Public institutions
Gas, water supply and drainage, airport, train, port
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
EOCR-i3BZ / i3BZ2 Bottom hole type
EOCR-iFBZ / iFBZ2 Bottom hole type
EOCR-i3BZi / 3BZ2 Terminal type
EOCR-iFBZ / iFBZ2 Terminal type
General Features
Earth fault detection by built-in ZCT
Multifunctional motor protection for rated motor currents up to 80A (Definite Overcurrent protection) :
Over Current, Under Current, Phase Loss, Phase Reversal, Stall, Jam, Current Imbalance, Earth Fault
Thermal Inverse / Inverse overload protection up to 32Amps by integrated CTs.
Real Time Processing / High Precision
Ancillary Functions : Fail Safe, Alert(“C” Type Only), Accumulated Running Hour, 3 Fault records & limitation of auto-reset attempt.
Communication : Modbus-RTU/RS-485(i3BZ/iFBZ only)
Reinforced Monitoring Function : Real Time Monitoring up to 400M, 3 Phase Current Display, Pre-alarm & Cause of Trip indication.
Load ratio indication of Load Current to over-current threshold.
Support Single-phase and 3 Phase Motor
For iFBZ / FBZ2, normal operation except display is guaranteed when PDM is disconnected
6
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Protection functions
Item
Operating Condition & Setting Range
Load current(In) exceeds threshold(Is)
Operation Time
Definite(Def) : 0.2~30s Adjustable
Over Current (oc)
Setting Range : 0.5~80A(Def), 0.5~32A(Inv & th)
Load current(In) less than threshold(uc) In <= uc
uc should be less than oc Setting
Inverse(Inv) & Thermal(th) : 1~30 Class
Under Current (uc)
Phase Loss (PL)
Reverse Phase(rP)
oFF, 1~30s Adjustable
max imbalance is more than 85% among 3 phase current,
Enable or disable : Selectable
oFF, 0.5~5s Adjustable
Within 0.15s
Reversed phase sequence input on EOCR.
Enable or disable : Selectable
Active only in motor starting, In ≥ Stall threshold (Sc×OC).
Setting Range : Adjustable
Stall (Sc)
Jam (JA)
Immediately after D-Time elapsed
0.2~10s Adjustable
2~8 times of oc setting if Sc×OC doesn’t exceed 250A
Active only in motor running, In ≥ Jam threshold (JA×OC).
Setting Range :
1.5~8 times of oc setting if JA×OC doesn’t exceed 250A
Current unbalance ≥ threshold1~10s Adjustable.
Setting Range : 10~50%
Unbalance (ub)
Earth Fault (EF)
1~10s Adjustable
Unbalance[%] = 100 × (Max phase current - Min phase current)/
Max phase current
EF current(Ie) exceeds threshold(Ies)
0.1~10s Adjustable
Setting Range : oFF, 0.03~10A
Auxillary functions
Password
Secure configuration, available only with i3BZ/iFBZ
Communication
Fail Safe
Serial network communication for monitoring of metering, status, and fault history
Enable/Disable fail-safe operation of OL trip output
Phase selection
Total Running-Hour
Running-Hour
Fault History
Select a Single-phase motor or 3-Phase motor
Record of total running from installation which cannot be modified or cleared
Accumulated running hour from preset point which can be cleared to zero, when motor stops
Records for recent 3 faults each phase current which stored in a non-volatile memory
Limitation of autoreset attempt Block auto-reset if the reset count exceeds the pre-set count within 30 minutes
Communication function (Applicable to i3BZ/iFBZ)
Item
Setting
Remark
Protocol type
Modbus RTU
RS-485
Communication type
Baud rate
1.2, 2.4, 4.8, 9.6, 19.2, 38.4 kbps
Maximum length of the bus Maximum 1.2kM
Type of trunk cable RS-485 Shielded Twist 2-Pair Cable
Depend on the environment
7
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Specifications
Model
i3BZ/iFBZ, 3BZ2/FBZ2
Over Current
Rated Setting Range(A)
Rated Setting Range(A)
Definite TCC : 0.5~80A
Inverse & th TCC : 0.5~32A
*** CAUTION : Do not use any external CT
0.5A ~ less than oc setting
Definite(Def) / Inverse(Inv) / Thermal Inverse(th)
0~200s
Under Current
*1)
Operating Time Characteristics
Time Setting
Definite
D-Time
O-Time
0.2~30s
Inv & th (cLS)
Auto-Reset
1~30 Class
0.5s~20min.
Reset Mode
Power Voltage
Frequency
Manual Reset (H-r) / Electric Reset (E-r)
Control
100~240VAC/DC(-15%, +10%, Free Voltage), 24VAC/DC(-15%, +10%) .
50/60Hz
Power Consumption
Capacity
Lower than 7VA
Output
Display
3A/250VAC Resistive.
Composition
7 Segment LED
Bar-graph
NO/NC common output : OL , NO output : GR
3 phase Amps, Cause of trip, Setting parameters indication.
Load ratio (65 ~ 100%)
*2)
Communication
Mounting
Modbus-RTU/ RS-485
Panel Mounting (i3BZ/3BZ2)
Flush Mounting (iFBZ/FBZ2)
Over DC500V 10MΪ
Insulation
Between Case & Circuit
Dielectric Strength
Between Case & Circuit
Between Contacts
Between Circuit
: IEC61000-4-2
: IEC61000-4-3
: IEC61000-4-6
: IEC61000-4-4
: IEC61000-4-5
: CISPR11
2KV, 50/60Hz, I Min.
1KV, 50/60Hz, I Min.
2KV, 50/60Hz, 1 Min
Electrostatic Discharge(ESD)
Radiated Disturbance
Conducted Disturbance
EFT/Burst
Level 3 : Air Discharge : ±8KV, Contact Discharge : ±6KV
Level 3 : 10V/m, 80 ~ 1000MHz
Level 3 : 10V, 0.15~80MHz
Level 3 : ±2KV, 1 Min
Surge
Level 3 : 1.2×50㎲, ±4KV(0 , 90 , 180 , 270
Class A (Conducted and Radiated)
-40℃ ~ +85℃
)
Emission
Environment
Temperature
Humidity
Store
Operation
-20℃ ~ +60℃
30~85% RH (Non-condensate)
70W×74.5H×83.8D
Dimension
Weight
Window Type
Bottom Hole Type
70W×56.3H×108.1D
i3BZ : 295g, iFBZ : 280g
3BZ2 : 292g, FBZ2 : 276g
PDM : 125g, 3M cable : 120g
*1) : 3BZ2/FBZ2 has no thermal inverse protection
*2) : 3BZ2/FBZ2 has no MODBUS Communication
8
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Time-current characteristic curve
1. Inverse characteristic (0.5~32A)
2. Definite characteristic
3. Inverse thermal characteristic (0.5~32A)
9
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Over current and time setting tips
● Over current
Setting tips in definite TCC mode
1. Over current threshold (OC) :
- Set the OC at the rating current of a motor. To protect machine together, it is recommended to set at 110~120% of the actual normal operating
current.
2. Starting delay time (D-time)
- Set an expected start-up time to reach the normal current of load. If you do not know it, set to 15sec at first and start-up the motor to measure the
time to reach the normal operation current by monitoring the displayed current and then set the time at 2 sec longer than the time measured. For
a Y-D start, it’s better to set time 2 sec longer than the preset time of the Y- change timer.
3. Operation time (O-time) : Set the trip delay time which activates and counts down under a fault condition.
Configuration tips when Inverse or Thermal Inverse characteristic is necessary
1. Overcurrent threshold (oc) :
- This value is the basic current and from the point of 105% of oc, the inverse curve starts. Usually oc is set to the rated current of the motor.
2. Starting delay time (D-time)
- Usually this value is set to zero. With zero D-time and Inverse is selected, first the cold curve is applied until the load current drops down the oc
value, and then the hot curve is applied.
- But if the user wants fast trip with very high current during starting, set D-time other than zero. With non-zero D-time, the enabled STALL funtion
detects very high current immediately after the D-time elapsed.
- If the Inverse is selected, and D-time is non-zero, the Inverse function is blocked during starting, and the hot curve is applied after D-time elapsed.
- If Thermal Inverse is selected, it detects overcurrent regardless of D-time. That is, thermal inverse is activated during motor starting as well as
motor running.
3. Operation time (O-time) :
- When Inverse or Thermal Inverse is selected, O-time setting determines the trip class. nEOCR supports trip class from 1 to 30. Refer to the
graphical representation of Inverse or Thermal Inverse to check trip time.
Caution : Do not use any External CT
Alert Operation Pattern (#3)
Do use this function by OL/GR common output.
Running Stage
ALo Selection
Higher than the preset
Alert value
Starting
Normal Operation
Trip
Aux
1 Sec
◀▶
Flicker
1 Sec
◀▶
Hold
Fail-safe operation
A1-A2 powered and
under normal operation
A1-A2 powered
and Tripped
Fail-Safe
A1-A2 not powered
ON
OFF
10
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Front face
7 segment LED display
Phase indication
LED
LED
Reset
Ampere(A)
Second(s)
Phase indication
L1/L2/L3
Mode
selection
Bar graph
65 70 75 80 85 90 95 100%
Set/Store
5 digit 7 segment LED display
Power
Communication
OL NO Output
GR NO Output
3 phase currents (In) and the leakage current are displayed every 2 seconds in
sequence.
OL NC Output
Bar graph
7 segment LED display
�it shows the load factor to OC setting value by %
�% value = (running current/setting current) × 100%
�Min scale is 65%
�if the setting value is the rated motor current,
it shows the load factor of the motor.
Reset
Current display
Mode
selection
�Shows the highest current among three phases for oc, Stall, Jam trips.
�Shows the lowest current among three phases for uc, Ub trips.
�Shows the lost phase for PL.
Set / Store
�Shows the phase and the current during running.
Amp : Ampere. LED is on when a current display.
× 10 : Shows the unit changed to 10 times.
Sec : Second. LED is on when a time display.
Power
Communication
OL NO Output
GR NO Output
OL NC Output
11
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
3 phase digital ammeter function
2sec
L2 current display
2sec
L1 current display
2sec
Rotate
2sec
GF current
L3 current display
※Blocking display rotation can be done by pressing the SET button once during running. whenever press the SET button,
the each phase current displays by turns. A fixed phase current display can be done by this.
※Pressing the ESC button, it returns to the Auto current display rotation mode.
Buttons and Setting Sequence
Button
Description
Navigate menus by pressing UP/DN button.
Select a parameter to change, then the parameter starts blinking.
Modify a parameter value by pressing UP/DN button.
Memorize the values in the relay by pressing SET button. blinking stops to
show it’s stored.
Pressing ESC button, it returns to the current display. Without pressing ESC
button, it returns to the load current display in 50sec automatically.
※Fault history check : Pressing the ESC button more than 5sec, it displays the latest fault cause and the fault
current or fault phase. Continuing to press DN button, you can see the current of L1(R), L2(S), L3(T), (GR) in
turn. Press the DN button again to check the previous fault continually. In the latest fault display, the 100% LED
of bar graph lights on and two LEDs of 95%, 100% lights on for the second fault display, three LEDs of 90%,
95%, 100% lights on for the oldest fault display. When you press the ECS button in this mode, it returns to the
normal current display mode. The oldest fault record is over written when the number of fault to record exceeds
three.
●
Setting sequence
12
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Setting sequence and menu
No.
Menu
Parameter
Description
Default
Use password other than zero for secured configuration. This feature enables
limitation of setting modification by unauthorized person. Zero value is used for
disabling password checking.
1
Password
“Ph:3Ph” mode for a 3 phase load, “Ph:1Ph” mode for a 1 phase load should be
selected. If you select the “Ph:1Ph”, RP, PL and Ub functions will be disabled
and not displayed in the menu mode
2
3
Selection of Phase
TCC Selection
Time-Current Characteristic(TCC) setting. “dE” is for Definite TCC, “In” is for
Inverse TCC, “th” is for thermal inverse TCC. Refer to the time-current
characteristic curve . If tcc=no, only overcurrent protection is disabled.
Select 50 or 60 based on the system fundamental frequency.
4
5
6
7
Frequency
Fail Safe
Selection of Fail Safe(No volt release) operation for overload trip output,
OL. Refer to Fail-Safe Operation
Reversed Phase
detection
Enable or disable reverse phase detection
Threshold for Over Current protection which cannot be set below the
under current threshold(uc).
Over Current Threshold
Motor Starting delay, OC, UC, Stall, Jam, Ub are blocked during starting but PL,
RP, and thermal inverse are not blocked. For “In” TCC mode, the cold curve is
applied during before dt is activated and the hot curve is applied after the dt
expired.
8
9
Start Delay Time
(the fault duration of definite overcurrent protection.
the trip class for inverse overcurrent protection(refer to TCC curve)
(the class for thermal overload protection based on the thermal
image by load current (refer to TCC curve).
Over Current Duration
Under Current
Threshold
Threshold for Under Current protection. The setting should be higher than
no-load current of a motor. The current value cannot be set higher than OC.
Fault duration for the Under Current Operation. If the setting of “oFF” in the “uc”
mode is selected, this menu is not displayed
10
11
Under Current
Duration
Earth Fault
(Ground Fault)
Threshold
Threshold for Earth Fault protection. The capacitance leakage current of the
motor and cable should be taken into account for the setting.
The threshold value corresponds to the primary current of ZCT.
Earth Fault duration
12
13
14
15
16
Earth Fault Duration
EF starting Delay
Phase Loss
TCC is always a definite characteristic for earth fault detection.
Blocking time of Earth Fault detection during motor starting.
oFF, 1~30s adjustable This timer is only active during motor starting.
Enable or disable Phase Loss(Single Phasing) detection. If the “Ph:1Ph” is
selected , this menu is not displayed.
Fault duration for Phase Loss Operation . The setting range is 0.5~5 sec.
if “PL:oFF” is selected, this menu is not displayed
Phase Loss Time
Threshold for Current Unbalance operation. To disable the function, set to
“oFF”, The setting range is 10~50%.
17
18
Unbalance Threshold
Unbalance factor (%) = (max phase-min phase) / Imax phase ×100%
Unbalance fault duration for Current Unbalance operation.
The setting range is 1~10 seconds.
Unbalance fault
duration
Threshold for locked rotor detection during motor starting. The value is the
multiples of the over current threshold(oc).
19
Stall threshold
If the locked rotor condition is detected, the trip relay operates in 0.5s after
the “dt” expires.
If dt=0, this function is disabled and not displayed in the menu.
Threshold for locked rotor detection during motor running. The value is the
multiples of the over current threshold (oc)
20
21
Jam threshold
Jam fault duration
Jam Fault duration
13
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Setting sequence and menu
No.
Menu
Parameter
Description
Default
Threshold of Alert output, set by % of the over current threshold (oc). If the load
current is higher than this value, alert output(07-08 contact) is energized
according to the setting of “ALo:XX”.
If the load current is detected, alert output(07-08 contact) is energized. The alert
threshold is no meaning for this operation.
Refer to the Alert Operation Pattern.
If the load current is higher than the alert threshold, alert output(07-08 contact)
repeats open for 1s and close for 1s (flickering), The flickering starts from the
motor starting.
22
Alert*1)
Refer to the Alert Operation Pattern.
If the load current is higher than the alert threshold, alert output(07-08 contact) is
closed (holding) and remains closed until the load current decrease under the
alert threshold. The alert output is blocked during motor starting.
Refer to the Alert Operation Pattern.
If the accumulated running hour is more than the Running Hour threshold,
the alert output repeats close for 1s and open for 1s.
The alert output is used only for under current protection. If this mode is selected,
a trip by an under current fault is signaled through alert output(07-08), instead of
overload trip output(95-96 or 97-98).
Fault reset by a power cycle or by pressing the ESC button.
Fault reset only by pressing the ESC button.
23
Reset
Fault reset by a auto-reset timer,
Setting range of the timer : 0.5sec~20min.
Also the fault can be reset by a power cycle or by ESC button.
The maximum auto-reset number during 30 minutes in auto-reset mode.
The auto-reset counter is stored in the non-volatile memory and is cleared by
pressing ESC button when the counter reaches the limitation.
To disable limitation, select “oFF”. Setting range : oFF~5 times.
In this menu, toggle display, “-trh-” and the accumulated value, is activated.
The accumulation starts from the installation and the user cannot clear the
accumulated value.
24
25
Reset Limitation
Not
adjustable
Total Running Hour
This display unit is 1 hour.
In this menu, toggle display, “--rh-” and the accumulated value, is activated The
user can clear the accumulated value by selecting the running hour threshold to
“rh:oFF”. When motor stops
Not
adjustable
26
27
Running Hour
This display unit is 0.1 hour (6 minutes).
By selecting “ALo:to”, the user can get the alert signal through alert output(07-08)
when the accumulated value is more than the running hour threshold.
Threshold for alert output when the user selects “ALo:to”. The unit is 10 hours
and this menu is not displayed when the motor is starting or running.
Setting range : 10~9990 hours, oFF
Running Hour
Threshold
Modbus slave address.
Range : 1 ~ 247.
Setting for Communication speed
Range : 1.2kbps, 2.4Kbps, 4.8Kbps, 9.6Kbps,19.2Kbps, 38.4Kbps .
Parity setting
Range : odd, even, non.
28
Communication*2)
Duration for communication loss detection.
Displays alarm when no new communication data is received for the duration.
If “oFF” is selected, no monitoring for communication channel is activated.
Setting range : 1~999 sec, oFF
When this menu activated, OL trip signal and enabled EF trip signal is generated
when (3s+ot) expires. The display shows “End” when the test is done.
By pressing ESC, returns to the load current display mode.
This menu is not displayed when the motor is starting or running.
Before (3s+ot) expires, pressing ESC or motor starting or running blocks the test
trip and return to the load current display.
No
parameter
29
30
Test Trip
End
No
parameter
This shows the end of test trip. Test result is stored in the fault record.
*1) This menu is only available in “C” Type.
*2) These are applied to i3BZ & iFBZ only.
14
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Trip cause indication and fault records
3 fault records including the trip cause and 3phase currents are stored in a non-volatile memory.
Trip Indication
Trip
Indication
Indication after trip with UP/ DN button pressing
L1 LED on L2 LED on L3 LED on
Trip Cause
Contents of Indication
Over current
OC Trip caused by r-phase current
Phase loss
Reverse Phase
Stall
Phase Loss caused by r-phase lost
Phase reversal trip
Stall trip during motor starting
caused by s-phase current
Jam trip during motor running
caused by r-phase current
Jam
Imbalance trip caused by t-phase
current
Imbalance
Under current trip caused
by s-phase current
Under Current
Earth Fault
Limitation of auto-Reset
Earth Fault(Earth leakage) trip with
Earth Fault current indication
In 30minutes, the number of
For emergency restart, manual reset by pressing
auto-reset exceeds the pre-set count ESC clears the reset counter to zero.
Control terminals
A type
GR
OL
OL
COMM
A1 A2 57 58 95 96 97 98 V- D1 D0
S
Modbus Communication
Control Power
OL NO Output
OL NC Output
GR NO Output
C type
AL / UL / TO
OL / GR
COMM
A1 A2 07 08 95 96 97 98 V- D1 D0
S
Control Power
AL/UL/TO
Modbus Communication
OL/GR NO/NC Common Output
15
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Wiring Examples
3 phase line Diagram
3 phase line Diagram
EOCR-i3BZ/iFBZ
OL : b, GR : a
EOCR-i3BZ/iFBZ
OL : 1a 1b, GR : 1a
Caution
Caution
1. Do not use any External CT
1. Do not use any External CT
2. Earth fault detection by built-in ZCT
2. Earth fault detection by built-in ZCT
3 phase line Diagram
Single phase line Diagram
EOCR-i3BZ/iFBZ
OL : 1a 1b, GR : 1a
EOCR-i3BZ/iFBZ
OL : b, GR : a
Caution
1. Do not use any External CT
2. Earth fault detection by built-in ZCT
Caution
1. Do not use any External CT
2. Earth fault detection by built-in ZCT
Single line Diagram
Single line Diagram
FROM : BUSDUCT
FROM : BUSDUCT
EOCR-iFBZ
EOCR-FBZ2
MCCF-A1-RF
MCCF-B1-RF
MCCF-A1-RF
MCCF-B1-RF
DM
DM
DM
DM
DM
DM
DM
DM
DM
DM
P.T×3
380/110V
P.T×3
380/110V
EOCR
-iFBZ
EOCR
-iFBZ
EOCR
-iFBZ
EOCR
-iFBZ
EOCR
-iFBZ
EOCR
-FBZ2
EOCR
-FBZ2
EOCR
-FBZ2
EOCR
-FBZ2
EOCR
-FBZ2
F
F
MODBUS 485
MODBUS 485
MODBUS 485
MODBUS 485
MODBUS 485
MAIN
MCCB
MAIN
MCCB
DM
DM
C.T
Y-△
Y-△
Y-△
C.T
Y-△
Y-△
Y-△
16
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Dimensions
3-∅12
∅4.5
82
95
108.1
EOCR-i3BZ / 3BZ2 (Bottom Hole)
EOCR-i3BZ / 3BZ2 (Teminal Type)
EOCR-iFBZ / FBZ2 (Bottom Hole)
EOCR-iFBZ / FBZ2 (Teminal Type)
PANEL & DIN RAIL TYPE
MOUNTING HOLE SIZE
∅4.5
21.4 21.4
70
6-M4
45.3
82
95
108.1
PANEL & DIN RAIL TYPE
MOUNTING HOLE SIZE
3-∅12
∅4.5
82
95
108.1
126.7
PANEL & DIN RAIL TYPE
MOUNTING HOLE SIZE
∅4.5
45.3
6-M4
21.4 21.4
70
82
95
108.1
126.7
PANEL & DIN RAIL TYPE
MOUNTING HOLE SIZE
13.4
28.1
72
MOUNTING HOLE SIZE
EOCR-PDM
17
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EOCR-i3BZ/iFBZ/3BZ2/FBZ2
EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,
EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT
Order Code
For nEOCR- order
i
3
B
Z
-
WR A U H L
�
�
�
�
�
�
i3BZ
iFBZ
Intelligent, panel mounting unit
Intelligent, flush mounting unit
�
�
�
Basic Unit
3BZ2 Economic, panel mounting unit
FBZ2 Economic, flush mounting unit
Current Range
Output relay
WR
0.5~80A
OL : 95-96 (NC output), 97-98 (NO output)
GR : 57-58 (NO output)
A
OL/GR : 95-96 (NC output), 97-98 (NO output)
AL/UL/TO : 07-08
C
B
U
H
T
DC/AC 24V(-15%, +10%)
AC/DC 100~240V (-15%, +10%)
Through bottom-hole
�
Control Voltage
Wiring method
�
Through screw-terminal
�
Low frequency adaptation
L
For low system frequency (10Hz~100Hz)
For Cable order,
C A B
L
E
-
RJ45
-
0
0
1
�
�
�
Connector Typeb
RJ45
00H
Only support RJ45 connector
0.5M
001
1M
�
Cable Length
01H
1.5M
002
2M
003
3M
Others
Special order up to 400M
18
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Communication Guide
Modbus network setting
Communication setting value
Please set the Modbus communication parameters by PCON or HMI for the communication.
�Slave address
�Baud rate
�Parity
�Communication loss timeout
Slave address
The EOCR has slave addresses from 1 to 247.
The factory default setting is 1.
Baud rate
The Communication speed provided is like below.
�1.2kbps
�2.4kbps
�4.8kbps
�9.6kbps
�19.2kbps
�38.4kbps
The factory default setting is 19.2kbps
Parity setting
�Even
�Odd
�None
The factory default setting is even. Please refer to the table for the stop bit setting.
Parity setting
Stop bit
Even or Odd
1
None
2
Communication loss timeout
It is the criteria to confirm the communication disconnection with a master like as PLC.
EOCR judges it as a communication disconnection error, if there is no call from the master
during a certain preset time.
The time setting range is 1~999sec the factory default setting is OFF. The OFF means no
communication error check. It is advised to set it at OFF, if there is no concern of
communication disconnection or no needs of communication error check at ordinary times.
RS485 bus connection
RS485 standard allows several different characteristics.
�Polarization
�Line terminator
�Number of slaves
�Length of the bus
There is a definition of Modbus presented in detail at the website of Modbus.org in 2002.
Standard connection.
19
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Communication Guide
Standard connection
The standard connection conforms to the Modbus specifications, sepecially 2 wire
multidrop serial bus diagram, presented at the website of Modbus.org in 2002
(Modbus_over_serial_line_V1.pdf, Nov.2002). Simple wiring diagram is like below.
The characteristics is like below in case of a direct connection to the bus.
Items
Contents
single, shielded, twisted pair cable.
Min 3rd cable
Type of trunk cable
Maximum length of the bus
1000m (3,2181 ft) (at 19.2kbps)
32 stations (31 slaves)
Maximum number of
stations without repeater
�20m (66ft, at 1 tapoff)
Maximum length of tapoffs
Bus polarization
�40m (131ft, divided by tapoff no.
in Multi-Junction Box)
�450 - 650Ω Pullup resistor, 5V basis
�450 - 650Ω Pulldown resistor,
Recommend the polarization to Master at
Common. There is no polarization at
RS485 of EOCR .
Line terminator
120Ω Resistor, + /- 5%
YES (connect 1 protection ground minimum
to the bus)
Common polarity
20
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Communication Guide
Bus connection through a SCA type junction box
1. Master (PLC, PC or communication module)
2. Modbus cable (It is different according to the master side or a master having polarization combined to the other part of Bus)
3. Junction box
4. Modbus cable
5. Line terminators : 120Ω - 0.25W
Please use a cable with 2pair shieded twisted conductors for Interface protection.
It is adviced to isolate the Modbus cable 30cm(11.8in) at least from a power cable.
If necessary, intersect the Modbus cable to a power cable perpendicularly.
Refer to the diagram in the left side for the line terminator wiring.
2 wire MODBUS RJ45 connections
Pin on RJ45
Pin on nEOCR
EIA/TIA 485 name
4
5
8
D1
D0
V-
B/B’
A/A’
C/C’
Pin ‘S’ can be used for shield wire connection.
21
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Head Office
6th floor, Jeil Bldg., 94-46, Youngdeungpo-Dong 7Ka, Youngdeungpo-Ku, Seoul, Korea
Tel. 82 2 3473 2340 / Fax 82 2 3473 1159
Iksan Plant
574, Yongie-dong, Iksan-shi, Junbuk, Korea
Tel. 82 63 835 5033 / Fax 82 63 835 4175
04/2009
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