Interlocking For Breaker-And-A-Half Diameter Bh (3); Application - ABB REB670 Applications Manual

Busbar protection 2.1 ansi, relion 670 series

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1MRK 505 337-UUS -

Application manual

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

specify the state of the voltage supervision:

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 166.