ABB Relion 670 series - Page 785

14.2.7.2 Functionality
M13555-3 v8
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
417. The function can also be used for a single
busbar arrangement with transfer busbar or double busbar arrangement without transfer busbar.
189 289
189G
WA1 (A)
WA2 (B)
WA7 (C)
789
2089
289G
en04000514_ansi.vsd
152
ANSI04000514 V1 EN-US
Figure 417: Switchyard layout ABC_BC (3)
1MRK 502 066-UUS B Section 14
Control
779
Technical manual