12.3.10.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Interlocking for transformer bay AB_TRAFO - 3
12.3.10.2 Functionality
The interlocking for transformer bay (AB_TRAFO) function is used for a transformer
bay connected to a double busbar arrangement according to figure 199. 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 199: Switchyard layout AB_TRAFO
1MRK 502 048-UEN A Section 12
Control
405
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