GE 339

6–160 339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS CHAPTER 6: SETPOINTS
Figure 6-72: Relay 1 "TRIP" logic diagram
TRIP (Protection Controls)
Trip request
SETPOI
NT (BR
EAKER)
52b CONTACT
Contact input
SETPOI
NT (BR
EAKER)
52a CONTACT
Contact input
AND
OR
52b contact (Breaker Open = 1)
AND
Breaker Open
OR
At least one
contact
programmed
AND
OR
TRIP
No feedback
change
OR
timed reset
SETPOI
NT (BF)
BF FUNCTION : Disabled = 0
Latched Alarm Alarm
BF TIME DELAYS
SETPOI
NT (BF)
RUN
OR
OR
OR
AND
AND
Trip Output Seal-In Time
SETPOI
NT
t
RST
AND
LED: TRIP
OR
Local Open (Relay Keypad)
Remote Open
Relay Status (Ready = 1)
RESET (Relay Keypad)
RESET (Communications)
RESET (Input) S4 Control
OR
LED: TRIP
AND
OR
timer
100 ms
RUN
OR
t
RST
SETPOI
NT
BLOCK BKR TRIP Off=0
(Selected Input
,ON=1)
OR
Timer
2 sec
896775.cdr
TRIP
Operate Output Relay 1
TRIP
To Breaker Failure
(TRIP)
52a contact (Breaker Close = 1)