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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 Indication
Trip Indication after trip with UP/ DN button pressing
Trip Cause Indication Contents of Indication L1 LED on L2 LED on L3 LED on
Over current OC Trip caused by r-phase current
Phase loss Phase Loss caused by r-phase lost
Reverse Phase Phase reversal trip
Stall
Stall trip during motor starting
caused by s-phase current
Jam
Jam trip during motor running
caused by r-phase current
Imbalance
Imbalance trip caused by t-phase
current
Under Current
Under current trip caused
by s-phase current
Earth Fault
Earth Fault(Earth leakage) trip with
Earth Fault current indication
Limitation of auto-Reset
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.
3 fault records including the trip cause and 3phase currents are stored in a non-volatile memory.
Trip cause indication and fault records
Control terminals
A type
C type
Control Power
GR NO Output
OL NC Output
OL NO Output
Modbus Communication
A1 A2 57
58 95 96 97 98 V- D1 D0 S
GR OLOL
COMM
A1 A2 95
96 57 58 Z1 Z2 V- D1 D0 S
OL GR
COMM
A1 A2 95
96 97 98 Z1 Z2 V- D1 D0 S
OL / GR
COMM
ZCT
ZCT
Control Power
AL/UL/TO
OL/GR NO/NC Common Output
Modbus Communication
A1 A2 07
08 95 96 97 98 V- D1 D0 S
OL / GRAL / UL / TO
COMM