Delta connection motor phase failure protection circuit
Source: InternetPublisher:走马观花 Keywords: Protection circuit motor phase failure protection Updated: 2020/12/24
The phase failure protection circuit of a delta-connected motor is shown in the figure. Its protective function is as follows: connect the three resistors R and R3 to form an artificial
neutral point - when the motor loses phase, the neutral point shifts, the relay KA is powered on, and the normally closed contact of the relay is cut off. Contactor
KM coil circuit . When KM loses power, it is released, the main circuit circuit of the motor is cut off, and the motor M stops.
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