Functionality - ABB RET650 Technical Manual

Relion 650 series transformer protection

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1MRK 504 135-UEN A

Technical manual

Functionality

The interlocking for a double busbar double circuit breaker bay including

DB_BUS_A, DB_BUS_B and DB_LINE functions are used for a line connected to a

double busbar arrangement according to figure 139.

IEC04000518 V1 EN

Switchyard layout double circuit breaker

Three types of interlocking modules per double circuit breaker bay are defined.

DB_BUS_A handles the circuit breaker QA1 that is connected to busbar WA1 and the

disconnectors and earthing switches of this section. DB_BUS_B handles the circuit

breaker QA2 that is connected to busbar WA2 and the disconnectors and earthing

switches of this section.

en04000518.vsd

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