The working principle of the leakage protection switch:
The working principle of the leakage protector. LH is a zero-sequence current transformer, which consists of an iron core made of permalloy and a secondary coil wound on an annular iron core to form a detection element. The power phase line and neutral line pass through the circular hole to become the primary coil of the zero-sequence transformer. The rear outlet of the transformer is the protection range.
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