Cb Condition Monitoring - GE MiCOM P40 Agile Technical Manual

P44x/EN ST/Hb6
(ST) 4-40
3.1.2

CB condition monitoring

The following table, detailing the options available for the CB condition monitoring, includes
the setup of the current broken facility and those features which can be set to raise an alarm
or CB lockout.
Menu text
CB MONITOR SETUP
Broken I^
This sets the factor to be used for the cumulative I^ counter calculation that monitors the
cumulative severity of the duty placed on the interrupter. This factor is set according to the
type of Circuit Breaker used.
I^ Maintenance
Setting which determines if an alarm will be raised or not when the cumulative I^
maintenance counter threshold is exceeded.
I^ Maintenance
Setting that determines the threshold for the cumulative I^ maintenance counter monitors.
I^ Lockout
Setting which determines if an alarm will be raised or not when the cumulative I^ lockout
counter threshold is exceeded.
I^ Lockout
Setting that determines the threshold for the cumulative I^ lockout counter monitor. Set that
should maintenance not be carried out, the relay can be set to lockout the autoreclose
function on reaching a second operations threshold.
N° CB Ops Maint
Setting to activate the number of circuit breaker operations maintenance alarm.
N° CB Ops Maint
Sets the threshold for number of circuit breaker operations maintenance alarm, indicating
when preventative maintenance is due.
N° CB Ops Lock
Setting to activate the number of circuit breaker operations lockout alarm.
N° CB Ops Lock
Sets the threshold for number of circuit breaker operations lockout. The relay can be set to
lockout the auto-reclose function on reaching a second operations threshold.
CB Time Maint
Setting to activate the circuit breaker operating time maintenance alarm.
CB Time Maint
Setting for the circuit operating time threshold which is set in relation to the specified
interrupting time of the circuit breaker.
Default setting
2 1
Alarm Disabled Alarm Disabled, Alarm Enabled
1000In^ 1In^
Alarm Disabled Alarm Disabled, Alarm Enabled
2000In^ 1In^
Alarm Disabled Alarm Disabled, Alarm Enabled
10 1
Alarm Disabled Alarm Disabled, Alarm Enabled
20 1
Alarm Disabled Alarm Disabled, Alarm Enabled
0.1s 0.005s
MiCOM P40 Agile P442, P444
Setting range
Min Max
2
25000In^
25000In^
10000
10000
0.5s
Setting
Step size
0.1
1In^
1In^
1
1
0.001s