Cb Condition Monitoring Logic; Reset Circuit Breaker Lockout; Figure 127: Cb Condition Monitoring Logic Diagram - GE P4A Technical Manual

Chapter 12 - Monitoring and Control
5.6

CB CONDITION MONITORING LOGIC

I^ Maintenance
Alarm Enabled
Greatest broken current total
I^ Maintenance
I^ Lockout
Alarm Enabled
I^ Lockout
No. CB Ops Maint
Alarm Enabled
Max no . of CB operations
No. CB Ops Maint
No. CB Ops Lock
Alarm Enabled
No. CB Ops Lock
-1
Fault Freq Lock
Alarm Enabled
Fault frequency count
Fault Freq Count
-1
CB Time Maint
Alarm Enabled
Greatest CB travel time
CB Time Maint
CB Time Lockout
Alarm Enabled
CB Time Lockout
Reset Indication
Yes
Reset CB Data
Yes
Reset CB Data
Reset lockout Alarm
Control CB Unhealthy
Control no Check Synch
CB failed to trip
CB failed to close

Figure 127: CB Condition Monitoring logic diagram

5.7

RESET CIRCUIT BREAKER LOCKOUT

Lockout conditions caused by the circuit breaker condition monitoring functions can be reset according to the
condition of the Rst CB mon LO by setting found in the CB CONTROL column. There are two options; CB Close
and User interface.
256
&
&
&
&
&
&
&
&
&
1
&
S
Q
1
R
&
S
Q
R
1
S
Q
R
1
&
S
Q
R
1
S
Q
R
P54A/B/C/E
CB I^ Maint
CB Monitor Alarm
CB I^ Lockout
No. CB Ops Maint
No. CB Ops Lock
Pre-Lockout
CB FaultFreqLock
CB Mon LO Alarm
CB Time Maint
CB Time Lockout
Lockout Alarm
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P54xMED-TM-EN-1