Siemens SIPROTEC 7VU681, User Manual

Page: 20 / 112

Function
2.1 ATS
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012
20
The logics of Circuit breaker operation and supervision are shown as followed
Figure 2-3 Logic Diagram of CB operation
Note
1. The device does not support separate control function, it is not possible to operate the CB via front panel.
2. CB positions (52a and 52b) can be routed with 2 BIs as a double point signal. It also can be routed 1BI (H-
52a L-52b) as a normal open/close single point signal. If the default routing of CB is changed to single point
signal, the default display can be pdated with the single point signal. Otherwise the display of CB positions
on the display panel is incorrect. For example, CB1 position is changed to a single point signal, 17621 >CB1
52a routed with BI1"H" and 17622 >CB1 52b routed with BI1"L", or 17621 >CB1 52a routed with BI1"L"and
17622 >CB1 52b routed with BI1"H". 17621 >CB1 52a should be linked to the CB1 on the default display.
3. When testing ATS function is offline, simulation of CB closing/opening operation needs to be finished in 1s.
Otherwise the device releases warning messages of operation failure.