Settings P54x/EN ST/La4
MiCOM P543, P544, P545, P546
(ST) 4-71
ST
Setting range
Menu text Default setting
Min. Max.
Step size
CB Healthy Time 5 s 0.01 s 9999 s 0.01 s
A settable time delay included for manual closure of the circuit breaker. If the circuit
breaker does not indicate a healthy condition in this time period following a close
command then the relay will lockout and alarm.
& 437) r CB1 Health ectively to enable
Unhealthy is set and operator controlled CBx close
elled.
Input DDB (436 are used fo y & CB2 Healthy resp
CB1 and CB2 closing.
If the set time runs out with input DDB (304 or 326 for CB1 & CB2 respectively): CBx
Healthy low (= 0), alarm ManCBx
sequence is canc
Check Sync. Time 5 s 0.01 s 9999 s 0.01 s
A user settable time delay is included for manual closure with System Check
eck Synchroni sfied in this time
close the relay wil
stem
out w nal CBxMa alarm Control NoCS
lose
Synchronizing. If the System Ch
period following a
zing riteria are not sati
l lockout and alarm. command
Input signals CB1Man SCOK, DDB (1574) and CB2Man SCOK, DDB (1458) from sy
check logic is used to enable CB Closing by manual control.
If set time runs ith input sig n SCOK low (= 0),
CBxManClose (DDB 305 or 327 for CB1 & CB2 respectively) is set and CB c
sequence is cancelled.
Rst CB mon LO By CB Close User Interface, CB Close
This setting is used to decide preferred option to reset of a lockout condition caused by CB
monitoring conditions either by a manual circuit breaker close command or via the user
interface.
CB mon LO RstDly 5s 0.1s 600s 0.01s
If Rst CB mon LO By is set to CB Close then CB mon LO RstDly timer allows reset of
CB lockout state after set time delay.
CB1 Status Input 52B 1 pole
None, 52A 1 pole, 52B 1 pole, 52A & 52B
1 pole, 52A 3 pole, 52B 3 pole 52A & 52B ,
3 pole
Setting to define the type of circuit breaker contacts that will be used for the circuit breaker
control logic. Form A contacts match the status of the circuit breaker primary contacts,
form B are opposite to the breaker status.
When 1 pole is selected s grammable , individual contact must be assigned in the Pro
Scheme Logic for phase A, phase B, and phase C. Setting 3 pole means that only a
single contact is used, common to all 3 poles.
CB Status Time 5s 0.1s 5s 0.01s
Under healthy condition reaker a n opposite states. s the circuit b uxiliary contacts will be i
Should both sets of contacts be open or closed, it indicates that either the contacts, or the
wiring, or the circuit breaker are defective and an alarm will be issued after
CB Status Time delay. delay is set eration during normal The time to avoid unwanted op
switching duties.
CB2 Status Input 52B 1 pole
None, 52A 1 pole, 52B 1 pole, 52A & 52B
1 pole, 52A 3 pole, 52B 3 pole, 52A & 52B
3 pole
Setting to define the type of circuit breaker contacts that will be used for the circuit breaker
control logic. Form A contacts match the status of the circuit breaker primary contacts,
form B are opposite to t s. he breaker statu
When 1 pole is selected, individual contacts must be assigned in the Programmable
Scheme Logic for phase A, phase B, and phase C. Setting 3 pole means that only a
single contact is used, common to all 3 poles.
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