High Speed DC Circuit Breaker - G E Power Controls
High Speed DC Circuit Breaker - G E Power Controls
High Speed DC Circuit Breaker - G E Power Controls
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4.3.6 Shunt trip control unit<br />
Emergency STOP<br />
signal<br />
-X14<br />
5 6<br />
-K1<br />
:6<br />
4<br />
7<br />
:7<br />
-<br />
-X10, 11<br />
-S2<br />
24 V<br />
:7<br />
3<br />
A1<br />
-K1<br />
A2<br />
8<br />
:9<br />
-X10, 11<br />
+<br />
2<br />
3<br />
9<br />
-HS11<br />
C1<br />
4<br />
1<br />
10<br />
C2<br />
36/ _ _ _ X _ _ _<br />
Key position - 5<br />
Key number – 00: Without shunt trip or zero voltage release.<br />
Key number – 10: With shunt trip.<br />
• The EM-STOP signal is provided for resetting K2 on the SU-control circuit. It effects with priority in switching OFF (by ST or<br />
UVR) before switching ON. Once switching ON and OFF signals are simultaneous, switching OFF command will stay<br />
longer than switching ON. It means, that OFF command is master command.<br />
• The shunt trip operates for short time period only. After contacts opening, switch HS 11 cuts ST’s supply circuit.<br />
Fig. 27 ST control circuit<br />
S47183-e 01/2008 Design and specifications are subject to change without notice 21
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