ABB Relion 670 Series Technical Reference Manual page 711

1MRK505222-UUS C
12.4.7.1
Technical reference manual
Introduction
The interlocking for bus-coupler bay (ABC_BC, 3) function is used for a bus-coupler
bay connected to a double busbar arrangement according to figure 363. The function
can also be used for a single busbar arrangement with transfer busbar or double busbar
arrangement without transfer busbar.
189 289
189G
152
ANSI04000514 V1 EN
Figure 363: Switchyard layout ABC_BC (3)
WA1 (A)
WA2 (B)
WA7 (C)
2089
789
289G
en04000514_ansi.vsd
Section 12
Control
705