If there are several thick cables at a worksite and we only know that a large current flows through them, but we want to know the exact value of the current, the first thing that comes to mind is to disconnect the cable and connect an ammeter in series.
Surge protectors, also known as surge suppressors or lightning arresters, are protective devices used to absorb and discharge transient high-energy electrical pulses (induced lightning).
First, the main distribution box, sub-distribution box, and switch box should be set up in the order of ''main-sub-switch'' to form a ''three-level distribution'' mode.
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