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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4.3.7 Zero voltage release control unit<br />
-S2<br />
-X2 -X2<br />
:7 :6<br />
- X13<br />
3 4<br />
5<br />
-K2<br />
A1<br />
Emergency STOP<br />
signal<br />
-K1<br />
Emergency STOP<br />
signal<br />
A2<br />
6<br />
-<br />
7<br />
2<br />
-X2<br />
24 V<br />
+<br />
8<br />
-S2<br />
A1<br />
A2<br />
-K1 -K2<br />
1<br />
-X2<br />
-D1<br />
9 10<br />
U<<br />
36/ _ _ _ X _ _ _<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 />
• -S2 (-X2 :6/:7) is NO contact, predicted for indirect releasing of the UVR by relay -K2<br />
• -S2 (-X2 :8/:9) is NC contact predicted for direct releasing of the UVR. If it’s not used, please short this connection permanently.<br />
Fig. 28 UVR control circuit<br />
Key position - 5<br />
Key number – 00: Without shunt trip or zero voltage release.<br />
Key number – 20: With zero voltage release.<br />
22 Design and specifications are subject to change without notice 01/2008