Signal Type Description
Position
DPC Acquisition of the circuit-breaker position
The position 3-pole circuit breaker open and/or the position 3-pole
circuit breaker closed can be acquired by routing to 1 or 2 binary
inputs.
The signals must be routed to the binary input that is connected with the CB auxiliary contacts. The open and
closed signals do not necessarily have to be routed in parallel. The advantage of parallel routing is that it can
be used to determine an intermediate or disturbed position. On the other hand, this is not possible if only one
signal is routed.
In the monitoring direction, the position signals generate the following information when the open and
closed positions are acquired (see following table). This information is further processed by the Circuit-
breaker position recognition and Control function blocks.
Information Type Description
Off SPS Circuit-breaker position is opened.
On SPS Circuit-breaker position is closed.
Intermediate position SPS Circuit-breaker position is in intermediate position.
Disturbed position SPS Circuit-breaker position is in disturbed position.
Not selected SPS The circuit breaker is not selected for a control operation.
Other input signals are:
Signal Type Description
>Acquisition
blocking
SPS This is used to activate acquisition blocking of the circuit-breaker auxil-
iary contacts (see Other Functions 3.8.3 Persistent Commands for a
description of acquisition blocking).
>Reset
AcqBlk&Subst
SPS This is used to reset acquisition blocking and manual update of the
circuit breaker. Setting acquisition blocking and tracking is blocked with
the input activated.
>Ready
SPS The active signal indicates that the circuit breaker is ready for an OFF-
ON-OFF cycle.
The signal remains active as long as the circuit breaker is unable to trip.
The signal is used in the Automatic reclosing and Circuit-breaker test
functions.
Another output signal is:
External health
SPS This can be used to indicate the health of the physical circuit breaker.
For this, you must acquire any failure information for the circuit breaker
via a binary input. This failure information can set the appropriate state
of the External health signal with a CFC chart (using the
BUILD_ENS block).
The signal has no effect on the health of the function block.
Definitive Tripping, Circuit-Breaker Tripping Alarm Suppression
Definitive Tripping
Definitive tripping is always pending whenever the Automatic reclosing (AREC) function does not carry out
any reclosing after tripping. It follows that this is the case whenever an automatic reclosing is not present or
the AREC has been switched off.
Circuit-Breaker Tripping Alarm Suppression
In certain systems, the user may wish to actuate an alarm (for example, a horn) when tripping (circuit-breaker
tripping) occurs. This alarm should not to be issued if the circuit breaker is to be reclosed automatically after
5.7.7.4
Function-Group Types
5.7 Function-Group Type Circuit Breaker
SIPROTEC 5, Overcurrent Protection, Manual 285
C53000-G5040-C017-8, Edition 07.2017
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