Circuit Breaker
Overview
The Circuit-breaker function block represents the physical switch in the SIPROTEC 5 device.
The basic tasks of this function block are the operation of the circuit breaker and the acquisition of the circuit-
breaker auxiliary contacts and other circuit-breaker information.
The Circuit-breaker function block provides information about:
•
Number of switching cycles
•
Breaking current, breaking voltage, and breaking frequency
•
Summation breaking current
Tripping, Opening, and Closing the Circuit Breaker
The circuit breaker is operated in the following situations:
•
Tripping of the circuit breaker as a result of a protection trip command
•
Opening of the circuit breaker as a result of control operations
•
Closing of the circuit breaker as a result of automatic reclosing or control operations
Tripping is always the result of a protection function. The operate indications of the individual protection func-
tions are summarized in the Trip logic function block. The trip command that causes the tripping in the
Circuit-breaker function block is generated there.
To operate the circuit breaker, the Circuit-breaker function block provides the output signals that must be
routed to the corresponding binary outputs of the device (see Table 5-14).
[loausssc-090211-01.tif, 1, en_US]
Figure 5-77 Tripping, Opening, and Closing the Circuit Breaker
5.7.7
5.7.7.1
5.7.7.2
Function-Group Types
5.7 Function-Group Type Circuit Breaker
SIPROTEC 5, Overcurrent Protection, Manual 283
C53000-G5040-C017-8, Edition 07.2017
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