up breakers. The circuit breakers are normally upstream breakers which feed fault
current to a faulty feeder.
The back-up trip always includes a current check criterion. This means that the
criterion for a breaker failure is that there is a current flow through the circuit breaker
after the set back-up delay time.
A070696 V1 EN
Figure 89: Typical breaker failure protection scheme in distribution substations
6.3 Protection trip conditioning TRPPTRC
6.3.1 Identification
Table 76: Function identification
IEC 61850 identification:
TRPPTRC
IEC 60617 identification: I->O
ANSI/IEEE C37.2 device number: 94
6.3.2 Functionality
The protection trip conditioning function TRPPTRC is used as a trip command
collector and handler after the protection functions. The features of this function
influence the trip signal behavior of the circuit breaker. The user can set the minimum
trip pulse length when the non-latched mode is selected. It is also possible to select
the latched or lockout mode for the trip signal.
Section 6 1MRS756378 D
Protection related functions
184 REF615
Application Manual
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