ABB RET670 Applications Manual page 655

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1MRK504116-UUS C

Application manual

ANSI04000518 V1 EN

Switchyard layout double circuit breaker

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

DB_LINE (3) is the connection from the line to the circuit breaker parts that are

connected to the busbars. DB_BUS_A (3) and DB_BUS_B (3) are the connections

from the line to the busbars.

For a double circuit-breaker bay, the modules DB_BUS_A, DB_LINE and

DB_BUS_B must be used.

Configuration setting

For application without 989 and 989G, just set the appropriate inputs to open state and

disregard the outputs. In the functional block diagram, 0 and 1 are designated

0=FALSE and 1=TRUE:

If, in this case, line voltage supervision is added, then rather than setting 989 to open

state, specify the state of the voltage supervision:

IED application

en04000518_ansi.vsd

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