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What Is The Difference Between The Arc-extinguishing Device Of The DC Contactor And The AC Contactor?

May 18, 2018

The arc produced by AC contactor contacts can be naturally extinguished when the current is over zero, and the DC arc does not exist this natural over zero, only can rely on lengthening arc and cooling arc to extinguish the arc. Therefore, under the same electrical parameters, it is more difficult to extinguish the DC arc than to extinguish the AC arc, and the DC arc-extinguishing device is generally more complex than the AC device. And the DC contactor generally uses the magnetic blown-out arc-extinguishing device combined with other arc-extinguishing methods to extinguish the arc.