Interlocking For Bus-Section Breaker A1A2_Bs - ABB REC670 Applications Manual

Relion 670 series, bay control

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1MRK 511 401-UEN A

Bay control REC670 2.2 IEC

Application manual

If there is no second busbar B at the other side of the transformer and therefore no

QB4 disconnector, then the state for QB4 is set to open by setting the appropriate

module inputs as follows:

Interlocking for bus-section breaker A1A2_BS

The interlocking for bus-section breaker (A1A2_BS) function is used for one bus-

section circuit breaker between section 1 and 2 according to figure 142. The

function can be used for different busbars, which includes a bus-section circuit

IEC04000516 V1 EN-US

Switchyard layout A1A2_BS

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

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:

en04000516.vsd

IP14154-1 v2

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