The neutral point voltage open phase voltage relay protection circuit

Published:2012/11/14 19:52:00 Author:Ecco | Keyword: neutral point, voltage, open phase, voltage relay, protection | From:SeekIC

When any one phase of the motor three-phase power supply loses power, if the motor uses Y connection, wherein the neutral point (midpoint) voltage will be significantly improved. Therefore, the midpoint voltage can be used as off -phase fault signal. As shown in figure, the circuit uses voltage relay for protection device.



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