GE 350-A9

6–50 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S3 PROTECTION CHAPTER 6: SETPOINTS
Figure 6-21: 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 MULTIPLIER:
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:
Do Not Operate, Operate
OUTPUT RELAY X
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
898006A2.cdr
GND T
OC DIRECTION
:
Forward
Disabled
Reverse
AND AND
GND DIR Reverse
From GROUND DIRECTIONAL
GND DIR Forward
OR
BLK GND DIR OC UND
AND
SETPOINT