Interlocking For Breaker-And-A-Half Diameter Bh (3) - ABB RET670 Applications Manual

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IED application

989_OP = VOLT_OFF

989_CL = VOLT_ON

If there is no voltage supervision, then set the corresponding inputs as follows:

VOLT_OFF = 1

Interlocking for breaker-and-a-half diameter BH (3)

The interlocking for breaker-and-a-half diameter (BH_CONN(3), BH_LINE_A(3),

BH_LINE_B(3)) functions are used for lines connected to a breaker-and-a-half

diameter according to figure 275.

ANSI04000513 V1 EN

Switchyard layout breaker-and-a-half

Three types of interlocking modules per diameter are defined. BH_LINE_A (3) and

BH_LINE_B (3) are the connections from a line to a busbar. BH_CONN (3) is the

1MRK504116-UUS C

en04000513_ansi.vsd

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