The property master switch tripped.

1, that is, the electrical wiring in the home is damaged. When the electricity consumption exceeds a certain value, which exceeds the leakage current value of the household circuit breaker, the household circuit breaker has no time to trip, which exceeds the first-level protection and reaches the leakage current value of the unit-level circuit breaker.

2. It is also possible that the total load of each user under the main brake is too large, and the main brake trips for a period of time when it is overloaded.

3. The performance of the main brake is unstable, and a new switch needs to be replaced.

4. From the phenomenon that the renovated household meters don't go, it can be said for sure that there is electricity stealing or there is something wrong with the originally installed line.

Extended data

Common faults of leakage circuit breaker

Input trip

1) Three-phase power lines, including the zero line, can be corrected if they do not pass in the same direction as the zero-sequence current transformer.

2) There is an electrical connection between the installed leakage circuit breaker and the line without the installed leakage circuit breaker, so the two circuits can be separated.

3) There is a fire and a ground load in the line, so it is enough to eliminate such load.

4) The working zero line passing through the zero-sequence current transformer has repeated grounding phenomenon, which should be eliminated.

5) The leakage circuit breaker itself is faulty and should be replaced.

breakdown

1). For example, when an operating overvoltage occurs in the line, the circuit breaker can be activated. At this time, a leakage circuit breaker with time delay or immobile impulse voltage can be selected, a resistance-capacitance absorption circuit is installed between contacts to suppress overvoltage, and an overvoltage absorption device is put in the line.

2) Electromagnetic interference. If there is magnetic equipment or high-power electrical equipment nearby, the installation position of leakage circuit breaker should be adjusted to keep it away from such electrical components.

3) Improper grounding. If the zero line is repeatedly grounded, it will cause the misoperation of the leakage circuit breaker.

4) Influence of overload or short circuit. If the leakage circuit breaker has both short-circuit protection and overcurrent protection, and the setting current of the overcurrent protection trip is inappropriate, misoperation will occur, and the setting current value can be adjusted at this time.

Baidu Encyclopedia: Leakage Circuit Breaker