Micom P631, Technical Manual, Page: 217 / 638

64Z1103C
CBF_1:
Current flow A
[ 038 230 ]
I ̲ A
I ̲ B
I ̲ C
CBF_1:
Current flow B
[ 038 231 ]
CBF_1:
Current flow C
[ 038 232 ]
CBF_1:
Current flow Phx
[ 038 233 ]
CBF_1:
IN<
[ 022 180 ]
CBF_1:
Evaluation IN
[ 022 184 ]
0
1
2
0: Without
2
I ̲ N
1 ... 2
CBF_1:
Current flow N
[ 038 235 ]
CBF:
IN
460 394
1
1: Calculated
2: Measured
≥ 1
c1
c2
CBF_1:
I<
[ 022 160 ]
+
+
+
Fig. 3-128: Current flow monitoring
3.27.8 Evaluation of CB Status Signals
Trip signals included in the general trip command which use status signals
provided by the CB auxiliary contacts in addition to current flow monitoring, can
be selected with the parameter CBF_1: Fct.assignm. CBAux. .
Applying CB status signals depends on the type of auxiliary contacts available.
The P631 can check the following CB status signals for plausibility and evaluate
them:
●
The ‘Open’ signal from the circuit breaker, MAIN: CB1 open 3p EXT
●
The ‘Closed’ signal from the circuit breaker, MAIN: CB1 closed 3p EXT
Note that each circuit breaker CBx is permanently assigned to the respective
CBF_x function. In the following description, CB1 is used as an example.
The evaluation of the CB status signals is blocked, if the configuration of the
respective binary signal inputs or the signal levels are not plausible. This will
result in the P631 issuing the signal CBF_1: CB pos. implausible. Evaluation
of current criteria is not affected by this blocking.
If only one of the two possible CB status signals has been configured, then this
configured signal will always be considered plausible by the P631.
3 Operation
P631
P631/EN M/R-11-C // P631-310-650 3-161