Section 12
Control
•
QC71_OP = 1
•
QC71_CL = 0
If there is no second busbar B and therefore no QB2 and QB20 disconnectors, then the
interlocking for QB2 and QB20 are not used. The states for QB2, QB20, QC21, BC_12, BBTR are
set to open by setting the appropriate module inputs as follows. In the functional block
diagram, 0 and 1 are designated 0=FALSE and 1=TRUE:
•
QB2_OP = 1
•
QB2_CL = 0
•
QB20_OP = 1
•
QB20_CL = 0
•
QC21_OP = 1
•
QC21_CL = 0
•
BC_12_CL = 0
•
VP_BC_12 = 1
•
BBTR_OP = 1
•
VP_BBTR = 1
12.4.4
Interlocking for transformer bay AB_TRAFO
12.4.4.1
Application
The interlocking for transformer bay (AB_TRAFO) function is used for a transformer bay
connected to a double busbar arrangement according to figure 157. 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.
310
1MRK 505 370-UEN D
IP14149-1 v2
M13567-3 v7
Busbar protection REB670
Application manual