Dingfeng Capacitor -- What is the difference between starting capacitor and running capacitor?
Update Time:2018-08-03

Q: Dingfeng Capacitor -- What is the difference between starting capacitorand running capacitor?

A: Asingle-phase AC motor requires a starting capacitor to operate properly, somemotors are equipped with two capacitors, a starting capacitor and a running capacitor.

Regardless of the type of capacitor, it has a starting action at the beginning of the motor start.However, when the motor reaches about 75% of the rated speed, the starting capacitor is automatically disconnected by the centrifugal switch, and the running capacitor continues to work with the motor.

The starting capacitor is an instant short-time operation. The withstand voltage requirement is above 250V,and the running capacitor has to work for a long time, and the withstand voltage is required to be above 450V.

The ac start capacitor is to make the starting coil of the single motor energize at startup, and cut off after starting. The ac run capacitor is to make the motor compensate for the capacitor during operation. so the starting capacitor is necessary, and the running capacitor is not necessary.

The capacity of the motor start capacitor is large, generally 2-5 times of the motor run capacitor. the capacity of the running capacitor is small. the capacity difference between the two is huge, and it is easy to distinguish.



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