ABB REC 561 User Manual page 394

ABB Network Partner AB
Version 1.0-00
3.2.7 Double CB bay,
DB_BUS_A,
DB_LINE,
DB_BUS_B
Interlocking
Two types of interlocking modules per double circuit breaker bay are
defined. DB_LINE is the connection from the line to the circuit breaker
parts that are connected to the busbar. DB_BUS is the connection from
DB_LINE to one busbar and is used for each busbar. The busbar earthing
switches must also be interlocked as described in the BB_ES chapter.
Q25
Q15
Q61
Q9
Fig. 9 Switchyard layout double circuit breaker
Q1
Q51
Q01
Q52
Q8
1MRK 580 151-XEN
Page 6 - 109
A (BB1)
B (BB2)
Q2
Q54
Q02
DB_
Q55
BUS
Q62
Q53
DB_
LINE
(X80151-9)