Cold Load Pickup 1 - GE F60 Instruction Manual

5 Z SETTINGS
SETTING
Function
Disabled = 0
Enabled = 1
COMPARATORS
Run
SOURCE 1
V_2
V_1
Run
I_1
Run
Run
Run
FLEXLOGIC OPERANDS
SRC1 50DD OP
OPEN POLE OP
The OPEN POLE OP operand is applicable
to the D60, L60, and L90 only.
PATH: SETTINGS CONTROL ELEMENTS

COLD LOAD PICKUP 1

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
There are two (2) identical Cold Load Pickup features available, numbered 1 and 2.
This feature can be used to change protection element settings when (by changing to another settings group) a cold load
condition is expected to occur. A cold load condition can be caused by a prolonged outage of the load, by opening of the
circuit breaker, or by a loss of supply even if the breaker remains closed. Upon the return of the source, the circuit will expe-
rience inrush current into connected transformers, accelerating currents into motors, and simultaneous demand from many
other loads because the normal load diversity has been lost. During the cold load condition, the current level can be above
the pickup setting of some protection elements, so this feature can be used to prevent the tripping that would otherwise be
caused by the normal settings.
GE Multilin
V_2 > 0.1 pu
OR
V_1 < 0.05 pu
AND
I_1 > 0.075 pu
TIMER
V_1 < 0.80 pu
2 cycles
AND
I_1 < 0.05 pu
20 cycles
AND
OR
AND
AND
Figure 5–110: VT FUSE FAIL SCHEME LOGIC
COLD LOAD PICKUP
COLD LOAD 1
FUNCTION: Disabled
COLD LOAD 1 PICKUP
SOURCE: SRC 1
COLD LOAD 1 INIT:
Off
COLD LOAD 1 BLK:
Off
OUTAGE TIME BEFORE
COLD LOAD1: 1000 s
ON-LOAD TIME BEFORE
RESET1: 100.000
F60 Feeder Protection System
5.7 CONTROL ELEMENTS
AND
Reset-dominant
SET
OR
Latch
AND
RESET
AND
OR SET
FUSE
FAIL
AND
Latch
RESET
Reset-dominant
5.7.13 COLD LOAD PICKUP
COLD LOAD PICKUP 1(2)
Range: Disabled, Enabled
Range: SRC 1, SRC 2
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: 0 to 1000 s in steps of 1
Range: 0.000 to 1000 000.000 s in steps of 0.001
FAULT
FLEXLOGIC OPERANDS
SRC1 VT FUSE FAIL OP
SRC1 VT FUSE FAIL DPO
FLEXLOGIC OPERAND
5
SRC1 VT FUSE FAIL VOL LOSS
827093AM.CDR
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