How to deal with loud noise of contactor The AC contactor is noisy, mainly due to dust on the contact surface of the moving and static iron cores, or the contact surface is uneven after the contactor has been used for a long time. When the contactor is closed, the contact between the moving and static iron cores is not tight, causing magnetic flux leakage. The solution is to disassemble the contactor and wipe off the oil and dust on the contact surface of the iron core. . . . . . . . #powersuppl
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