ABB REC 561 User Manual page 390

ABB Network Partner AB
Version 1.0-00
3 Design
3.1 General
3.2 Standard modules
Interlocking
The implementation of the interlocking is decentralized to each bay.
There are different interlocking modules dependent on the topology kind
of the substation (breaker and a half or various bus bar arrangements) and
the bay types. The interlocking logic for each module is specified in
boolean algebra for the switch states. To keep their amount easy to han-
dle, only operating sequences in normal service are permitted. For other
uncommon operations, the command handling has an interlock override
feature.
To make the implementation of the interlocking function easy, several
standard modules are available. The modules also have inputs that can be
used for delivery-specific interlocking conditions. The switchyard
arrangements are described below, to which the standard modules can be
used. The appendix describes input and output details.
In REC 561, these standard modules are available:
Type 1 (basic):
• A1A2_DC and
• 3 BB_ES and either
• AB_TRAFO or
• ABC_LINE or
• ABC_BC or
• A1A2_BS or
• DB_BUS_A, DB_LINE, DB_BUS_B
Type 2 (basic + option 1):
• 2 A1A2_DC and
• 6 BB_ES and
• DB_BUS_A, DB_LINE, DB_BUS_B and
• BH_LINE_A, BH_CONN, BH_LINE_B and either
• AB_TRAFO or
• ABC_LINE or
• ABC_BC or
• A1A2_BS or
• DB_BUS_A, DB_LINE, DB_BUS_B and either
• AB_TRAFO or
• ABC_LINE or
1MRK 580 151-XEN
Page 6 - 105