ABB REC650 ANSI, Applications Manual

Page: 267 / 370

10.4.11 Interlocking for transformer bay AB_TRAFO (3)
10.4.11.1 Application
The interlocking for transformer bay (AB_TRAFO, 3) function is used for a transformer
bay connected to a double busbar arrangement according to figure
124 . 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
489 389
252 and 489G are not
used in this interlocking
AB_TRAFO
en04000515_ansi.vsd
252
152
ANSI04000515 V1 EN
Figure 124: Switchyard layout AB_TRAFO (3)
The signals from other bays connected to the module AB_TRAFO are described below.
10.4.11.2 Signals from bus-coupler
If the busbar is divided by bus-section disconnectors into bus-sections, the busbar-busbar
connection could exist via the bus-section disconnector and bus-coupler within the other
bus-section.
1MRK 511 286-UUS A
Section 10
Control
261
Application manual