Power Considerations - ABB R-MAG Series Instructions Manual

Vacuum circuit breaker (ovb-dcm) 15.5 kv 1250/2000/3000 a
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38-929M-15A
10/15/02
1:11 PM

6.0 POWER CONSIDERATIONS

The ED2.0 power supply recharge unit adapts any voltage within the specified range of the
board to maintain 80 V across the capacitors. The following voltage thresholds must be
reached to complete the specified operations:
1. The capacitor voltage threshold for an Open operation is 49 volts.
2. The capacitor voltage threshold for a Close-Open operation is 72.5 volts.
3. The capacitor voltage threshold for a Open-Close-Open operation is 78 volts.
Illustrations 5 and 6 are provided to indicate the states of the Ready LED, Ready and Not
Ready output contacts.
Page 40
Load Limit Curve
ILLUSTRATION 4 – OUTPUT CONTACT DERATING CURVE
Page 36

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