GE 339

CHAPTER 7: MAINTENANCE M3 BREAKER MAINTENANCE
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 7–13
Figure 7-10: BKR trip counter logic diagram
898773A3.cdr
TOTAL ≥ LIMIT
AND
RUN
SETPOINT
Event Recorder
Transient Recorder
Trip Counter Reset
Trip Counter OP
Message
SETPOINT
TRIP COUNTER FUNC Disabled= 0 Latched Alarm Alarm
OR
OR
AND
Trip command
52a/b contact (Breaker Open)
INITIAL BKR TRIPS
SETPOINT
Increment Counter
TRIP COUNTER LIMIT
BRK TRIP COUNTER
ACTUAL VALUES
Breaker Initial trips
Counter = Initial trips + new trips
RST BKR TRIP COUNT
SETPOINT
No = 0 Yes
Set to Zero
AND
Counter = 0
LED: ALARM
RESET
Command
AND
S R
LATCH
0ms
t
DPO
= 100 ms
SETPOINT
Do Not Operate, Operate
OUTPUT RELAY X