Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
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3.3.4 Tests for Circuit Breaker Failure Protection
General
If the device is equipped with the breaker failure protection and this function is used, its interaction with the
breakers of the power plant must be tested in practice.
Especially important for checking the system is the correct distribution of the trip commands to the adjacent
circuit breakers in the event of breaker failure.
Adjacent circuit breakers are those which must trip in the event of a breaker failure in order to cut off the short-
circuit current. Therefore these are the circuit breakers that feed the faulted line.
It is not possible to define a generally applicable, detailed test specification since the definition of adjacent
circuit breakers depends to a large extent of the plant layout.
3.3.5 Testing Analog Outputs
The SIPROTEC devices 7UM62 can be equipped with up to 2x2 analog outputs. Where analog outputs are
provided and used, their functioning should be tested.
Since various types of measured values or events can be output, the test to be performed depends on the
values involved. These values must be generated (e.g. with secondary test equipment).
Make sure that the proper values are correctly output at their destination.
3.3.6 Testing User-defined Functions
CFC Logic
The device has a vast capability for allowing functions to be defined by the user, especially with the CFC logic.
Any special function or logic added to the device must be checked.
Naturally, general test procedures cannot be given. Rather, the configuration of these user defined functions
and the necessary associated conditions must be known and verified. Of particular importance are possible
interlocking conditions of the switchgear (circuit breakers, isolators, etc.).
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