ABB Relion 670 Series Applications Manual page 337

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1MRK 505 370-UUS Rev. K

ANSI04000516 V1 EN-US

Figure 162: Switchyard layout A1A2_BS (3)

The signals from other bays connected to the module A1A2_BS are described below.

Signals from all feeders

If the busbar is divided by bus-section circuit breakers into bus-sections and both circuit breakers are

closed, the opening of the circuit breaker must be blocked if a bus-coupler connection exists between

busbars on one bus-section side and if on the other bus-section side a busbar transfer is in progress:

ANSI04000489 V1 EN-US

Figure 163: Busbars divided by bus-section circuit breakers

To derive the signals:

These signals from each line bay (ABC_LINE), each transformer bay (AB_TRAFO), and bus-coupler bay

(ABC_BC) are needed:

Busbar protection REB670

Application manual

No busbar transfer is in progress concerning this bus-section.

The switch status of BBTR is valid.

No transmission error from any bay connected to busbar 1(A) and 2(B).

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Relion reb670