1. Under what circumstances does the leakage maintainer not maintain the electric shock?
The leakage switch models commonly used in general families are 1P+N and 2P, as far as the leakage maintainer of 1P+N and the leakage maintainer of 2P (single-phase electricity maintenance) are concerned, when people touch the zero line and the front together, people are electrocuted, but they will not be maintained. Why, because the person who is electrocuted now is quite an electrical appliance at home, such as a light bulb, at this time, the balance of the current has not been destroyed, that is, the current flowing in from the front is equal to the current flowing out of the zero line, so the detection device inside the switch does not detect the leakage current and will not act, will not trip maintenance. This should be recognized and noted.
2. What short circuit cannot be maintained?
We can imagine that if a switch does not have a short-circuit maintenance function, then the result of a short circuit in the line will be terrible, unless the switch is broken. The overload maintenance function actually implies the short-circuit maintenance function, because the short-circuit current is quite large, although the switch is not equipped with a special short-circuit action coil inside (some circuit breakers are equipped with a special short-circuit maintenance coil inside), however, the overload maintenance hot metal sheet located in the switch makes its temperature rise rapidly due to the huge short-circuit current, deformation, and drives the tripping mechanism to trip.
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