GE Multilin 350 Series

CHAPTER 6: SETPOINTS S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–65
Figure 16: Phase Time Overcurrent Protection Logic Diagram
SETPOINTS
Phase A current (IA)
SETPOINT
PH TOC FUNCTION: Disabled = 0
Latched Alarm
PH TOC PICKUP: PH TOC CURVE: PH TOC TDM:
AND
Phase B current (IB) Phase C current (IC)
OR
Operate Output Relay 1 (TRIP)
Event Recorder
Transient Recorder
LED: PICKUP
LED: TRIP
OR
Event Recorder
Transient Recorder
Alarm
OR
OR
Cold Load PKP
Phase Currents
Adjust Phase TOC PKP
AND
SETPOINTS:
Operate
output relays
upon
selection
OUTPUT RELAY 4 OUTPUT RELAY 5 OUTPUT RELAY 6 OUTPUT RELAY 3
Trip
AND
Trip
(To Breaker Failure)
PH TOC PH A OP
PH TOC PH BOP
PH TOC PH COP
Message
:
PH TOC OP
PH TOC PH A PKP
PH TOC PH B PKP
PH
TOCPHCPKP
PH TOC PKP
PH TOC RESET TIME: RUN
IA > PICKUP
RUN
IB > PICKUP
RUN
IC > PICKUP
Adjust PKP Adjust PKP Adjust PKP
SETPOINTS
BLOCK 1: Off=0 BLOCK 2: Off=0 BLOCK 3: Off=0
OR
Autoreclose
(per shot settings)
LED: ALARM
RESET
Command
AND
S
R
LATCH
898010.cdr
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