GE Multilin 850

CHAPTER 4: SETPOINTS PROTECTION
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–141
Figure 4-52: Ground Time Overcurrent Protection logic diagram
SETPOINTS
RUN
SETPOINTS
FUNCTION: Disabled = 0
Trip
PICKUP : CURVE : TDM :
Ig > PICKUP
AND
Operate Output Relay 1 (TRIP)
LED: PICKUP
LED: TRIP
Alarm
OR
OR
Adjust PKP
AND
Latched Alarm
AND
RESET:
Ground current (Ig)
From Ground CT
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 RELAYS
SETPOINTS
INPUT: Phasor, RMS
Configurable
Ground TOC 1 PKP
FLEXLOGIC OPERANDS
Ground TOC 1 OP
FLEXLOGIC OPERANDS
DIRECTION :
Direction ( from Ground
Directional OC element )
Set
Dominant
From Manual Close
Blocking
89$.cdr
850 Only
850, 889, 845 Only