GE 750 Instruction Manual page 201

S7 Control
GE Multilin
500
400
300
200
PICKUP
100
OUTAGE
0
-1 0
FIGURE 5–62: Cold Load Pickup
A cold load condition is initiated and overcurrent settings are altered when all phase
currents drop below 5% of the nominal current for an amount of time greater than
the
OUTAGE TIME BEFORE COLD LOAD
immediately initiated by asserting the logic input function 'Cold Load Pickup'.
Overcurrent settings are returned to normal after any phase current is restored to
greater than 10% of nominal and then a timer of duration equal to
expires.
BLOCK TIME
FIGURE 5–63: Cold Load Pickup Logic
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NORMAL TRIP SETTING
X
1 2 3
LOAD ENERGIZED
setpoint. The cold load condition can also be
750/760
Feeder Management Relay
PICKUP
4 5 6
Time (seconds)
COLD LOAD PICKUP
5–105