1 Password
2 Selection of Phase
3 TCC Selection
4 Frequency
5 Fail Safe
Reversed Phase
6detection
7 Over Current Threshold
8 Start Delay Time
9 Over Current Duration
Under Current
10 Threshold
Under Current
11 Duration
Earth Fault
12 (Ground Fault)
Threshold
13 Earth Fault Duration
14 EF starting Delay
15 Phase Loss
16 Phase Loss Time
17 Unbalance Threshold
Unbalance fault
18 duration
19 Stall threshold
20 Jam threshold
21 Jam fault duration
13
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
No. Menu Parameter Description Default
Setting sequence and menu
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.
“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
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.
Selection of Fail Safe(No volt release) operation for overload trip output,
OL. Refer to Fail-Safe Operation
Enable or disable reverse phase detection
Threshold for Over Current protection which cannot be set below the
under current threshold(uc).
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.
(tcc:dE) : the fault duration of definite overcurrent protection.
(tcc:In) : the trip class for inverse overcurrent protection(refer to TCC curve)
(tcc:th) : the class for thermal overload protection based on the thermal
image by load current (refer to TCC curve).
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
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
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
Threshold for Current Unbalance operation. To disable the function, set to
“oFF”, The setting range is 10~50%.
Unbalance factor (%) = (max phase-min phase) / Imax phase ×100%
Unbalance fault duration for Current Unbalance operation.
The setting range is 1~10 seconds.
Threshold for locked rotor detection during motor starting. The value is the
multiples of the over current threshold(oc).
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)
Jam Fault duration