ABB Relion 670 series - Interlocking for transformer bay AB_TRAFO (3); Introduction

Name Type Description
VPQB2TR BOOLEAN Switch status of 289 is valid (open or closed)
VPQB7TR BOOLEAN Switch status of 789 is valid (open or closed)
VPQB12TR BOOLEAN Switch status of 189 and 289 are valid (open or closed)
12.4.11 Interlocking for transformer bay AB_TRAFO (3)
12.4.11.1 Introduction
The interlocking for transformer bay (AB_TRAFO, 3) function is used for a
transformer bay connected to a double busbar arrangement according to figure
375.
The function is used when there is no disconnector between circuit breaker and
transformer. Otherwise, the interlocking for line bay (ABC_LINE, 3) function can be
used. This function can also be used in single busbar arrangements.
189
289
189G
289G
WA1 (A)
WA2 (B)
389G
489G
489389
252 and 489G are not
used in this interlocking
AB_TRAFO
en04000515_ansi.vsd
252
152
ANSI04000515 V1 EN
Figure 375: Switchyard layout AB_TRAFO (3)
1MRK505222-UUS C Section 12
Control
747
Technical reference manual