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Zero-voltage motor open-phase protection circuit diagram

2016-09-02 07:30  
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Zero-voltage motor open-phase protection circuit diagram
Figure 141 shows the Zero-voltage motor open-phase protection circuit diagram. When running motor occurs single-phase outage, the protection device can automatically cut off power to avoid motor occuring open-phase running. Working principle: when normal operation, the potential of the three-phase power balance point E is zero.