Figure. 5.4.7. - 38. IED is con gured as a dedicated CBFP unit.
In some applications dedicated circuit breaker protection unit is required. When the CBFP function is
con gured to operate with DI signal it can be used in these applications. When the IED is used for this
purpose the tripping signal is wired to the IED digital input and the IED:s own trip signal is used for
CBFP purpose only. In this application the retrip and also CBFP to upstream are also available for
different types of requirements. Retrip signal can be used for the section incomer breaker tripping and
CBFP for the upstream breaker tripping. In this example no retripping is utilized and CBFP signal is
used for the incomer trip from the outgoing breaker trip signal. The trip signal can be transported in
between of the IED:s also by using GOOSE messages if so wanted.
AQ-T257
Instruction manual
Version: 2.00
87
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