GE Multilin 350 Series

CHAPTER 7: MAINTENANCE M3 BREAKER MAINTENANCE
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–11
Figure 8: BKR trip counter logic diagram
TOTAL = LIMIT
OR
RUN
SETPOINT
Event Recorder
Transient Recorder
SETPOINT
Operate
output relays
upon
selection
OUTPUT RELAY
4
OUTPUT RELAY
5
OUTPUT RELAY
6
OUTPUT RELAY
3
Trip Counter PKP
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)
IN
ITIAL 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
RESET
Command
AND
S
R
LATCH
898773.cdr
LED: ALARM
Courtesy of NationalSwitchgear.com