Interlocking For Transformer Bay Ab_Trafo - ABB REG670 Applications Manual

Section 15
Control
15.3.4
15.3.4.1
526
• BC_12_CL = 0
• VP_BC_12 = 1
• BBTR_OP = 1
• VP_BBTR = 1

Interlocking for transformer bay AB_TRAFO

Application
The interlocking for transformer bay (AB_TRAFO) function is used for a transformer
bay connected to a double busbar arrangement according to figure 252. 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
T
QC3
QA2
QC4
QB3 QB4
IEC04000515 V1 EN
Figure 252: Switchyard layout AB_TRAFO
The signals from other bays connected to the module AB_TRAFO are described
below.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
WA1 (A)
WA2 (B)
AB_TRAFO
QA2 and QC4 are not
used in this interlocking
en04000515.vsd
1MRK 502 071-UEN -
Application manual