GE Multilin 850

4–168 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
Figure 4-65: Negative Sequence Time Overcurrent Protection logic diagram
SETPOINTS
RUN
SETPOINTS
FUNCTION : Disabled = 0 Trip
PICKUP: CURVE: TDM
I_2 > PICKUP
AND
Operate Output Relay 1 (TRIP)
LED: PICKUP
LED: TRIP
Alarm
OR
OR
Adjust PKP
AND
Latched Alarm
AND
RESET:
Negative sequence current (In_2)
Calculated value
SETPOINTS
BLOCK : Off = 0
From Autoreclose
(per shot settings )
From Cold Load Pickup
LED: ALARM
RESET
Command
AND
S R
LATCH
SETPOINTS
Do Not Operate, Operate OUTPUT RELAY 3 (X)
Phasor
Configurable
Neg Seq TOC 1 PKP
FLEXLOGIC OPERANDS
Neg Seq TOC 1 OP
FLEXLOGIC OPERANDS
DIRECTION :
Direction (from Neg Seq
Directional OC element
)
Set
Dominant
From Manual Close
Blocking
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