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Question:

What is the noise-free function of traditional contactors?

What is the noise-free function of traditional contactors?

Answer:

there will be noise. While the permanent magnet AC contactor is held by the permanent magnet force to maintain, so there will be no noise generated.
so that static and dynamic silicon steel plate pull, when the grid voltage or dynamic silicon steel surface is uneven or dust, foreign objects, etc
The traditional AC contactor is closed by the coil power to make the silicon steel sheet to produce electromagnetic force

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