GE P54C - Figure 93: Circuit Breaker Fail Logic - Part; Figure 94: Circuit Breaker Fail Logic - Part; Figure 95: Circuit Breaker Fail Logic - Part

4.4 CIRCUIT BREAKER FAIL LOGIC - PART 4
V00732
1
&
1
CB Fail1 Trip A
CBZCDStateA
WIINFEEDA
TripStateA
Bfail1 Trip 3ph
CB Fail Alarm
Bfail2 Trip 3ph
1
1
1
From phase B equivalent
From phase C equivalent
LatchATripResetIncomp*
1
1
Latch3PhTripResetIncomp
LatchNonITripResetIncomp
&
CB Fail 1 Status
Enabled
CB Fail 1 Timer
1
&
1 CB Fail2 Trip ATripStateA
&
CB Fail 2 Status
Enabled
1
&
ZCDStateSEF
TripStateSEF
&
CB Fail 1 Status
Enabled
1
&
TripStateSEF
&
CB Fail 2 Status
Enabled
*1: Not used in P445.
CB Fail 1 Timer
t
t
t
t
0
0
0
0
CB Fail 2 Timer
CB Fail 2 Timer
Figure 96: Circuit Breaker Fail logic - part 4
Not
e:
This diagram shows only phase-A for a single-CB device. The diagrams for phases B and C follow the same principle and are
not repeated here.
Chapter 8 - CB Fail Protection P54A/B/C/E
190 P54xMED-TM-EN-1