ABB REL670 2.2 IEC - Interlocking for Transformer Bay AB

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• BC_12_CL = 0

• VP_BC_12 = 1

• BBTR_OP = 1

• VP_BBTR = 1

15.4.4 Interlocking for transformer bay AB_TRAFO

IP14149-1 v2

15.4.4.1 Application

M13567-3 v7

The interlocking for transformer bay (AB_TRAFO) function is used for a

transformer bay connected to a double busbar arrangement according to figure 332.

The function is used when there is no disconnector between circuit breaker and

transformer. Otherwise, the interlocking for line bay (ABC_LINE) function can be

used. This function can also be used in single busbar arrangements.

QB1 QB2

QC1

QA1

QC2

WA1 (A)

WA2 (B)

QA2

QC3

QC4

QB4QB3

QA2 and QC4 are not

used in this interlocking

AB_TRAFO

en04000515.vsd

IEC04000515 V1 EN-US

Figure 332: Switchyard layout AB_TRAFO

M13566-4 v4

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

below.

1MRK 506 369-UEN B Section 15

Control

Line distance protection REL670 2.2 IEC 669

Application manual

ABB REL670 2.2 IEC - Interlocking for Transformer Bay AB_TRAFO