GE Multilin 350 Series

6–70 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S3 PROTECTION CHAPTER 6: SETPOINTS
Figure 18: Ground/Sensitive Ground timed overcurrent protection: Logic Diagram
SETPOINTS
RUN
SETPOINT
GND TOC FUNCTION: Disabled = 0
Alarm
GND TOC PICKUP: GND TOC CURVE: GND TOC TD MUL
TIPLIER:
Ig > PICKUP
AND
Operate Output Relay 1 (TRIP)
Event Recorder
Transient Recorder
LED: PICKUP
GND TOC PKP
LED: TRIP
Event Recorder
Transient Recorder
Latched Alarm
OR
OR
Message:
GND TOC OP
Adjust PKP
Adjust Gnd/S.Gnd 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)
GND TOC RESET:
Ground/Sens. Ground current (Ig)
From Ground CT or,
From Sens. Ground CT
SETPOINTS
BLOCK 1: Off=0 BLOCK 2: Off=0 BLOCK 3: Off=0
OR
Autoreclose
(per shot settings)
Cold Load PKP
LED: ALARM
RESET
Command
AND
S
R
LATCH
898006.cdr
Courtesy of NationalSwitchgear.com