How to tell the difference between AC contactor and DC contactor
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How to tell the difference between AC contactor and DC contactor
- The iron core of the AC contactor is made of Silicon steel sheet with double E shape;The iron core of the DC contactor is made of soft iron with U shape.
- The AC contactor uses grid plate arc-chute. The DC contactor uses magnetic blowout device.
- Since the AC electricity goes through the coil, in order to eliminate the vibration and noise on the iron core,we put the short-circuit ring on the iron core. But DC contactor doesn’t need it.
- The number of windings and resistance of the AC coil are less than the DC contactor.
- The start-up current of the AC contactor is high, it’s not suitable for the frequently start-off equipment, the frequency is up to 600 per hour, but the frequency of the DC contactor can be up to 2000 per hour.
- The AC contactor is suitable for breaking AC electricity, the DC contactor is for breaking DC electricity.
- The cost of the AC contacot is lower than the DC contactor