14.2.11.2 Functionality
The interlocking for transformer bay (AB_TRAFO) function is used for a transformer
bay connected to a double busbar arrangement according to figure 327. 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
T
QC4
QB4QB3
QA2 and QC4 are not
used in this interlocking
AB_TRAFO
en04000515.vsd
IEC04000515 V1 EN
Figure 327: Switchyard layout AB_TRAFO
Section 14 1MRK502052-UEN B
Control
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Technical manual
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