Published:2012/11/14 20:18:00 Author:Ecco | Keyword: △ connection, motor , phase failure, voltage relay protection | From:SeekIC
For △ connection motor, you must add neutral point, that is, three Y-shaped capacitors are connected ( impedance element ) with the motor in parallel, then the neutral point of Y shape is connected to the relay protection element, and it is shown in figure. During normal operation of the motor phase power supply, the neutral point voltage U00 is typically less than 10V.
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