The air switch in the household distribution box can't be closed after tripping, which leads to no electricity in the home. What should we do?

- Feb 23, 2021-

The air switch in the household distribution box can't be closed after tripping, which leads to no electricity in the home. What should we do?


Most people have experienced a trip, distribution box "pa" sound, the home power. Generally, we just need to turn on the trip switch again. But there are also special cases: sometimes, after the switch trips, it will be unable to close. What should we do at this time?


There are three possibilities that cause the switch unable to close. We need to judge according to the actual situation and start to solve the problem.


The switch is burnt out


The circuit breaker (another name for household switch, also known as "air switch") has a very delicate internal design. There is a protection device in it, which is specially designed to prevent the switch from burning down. After the switch burns down, it will automatically be in the off state and locked. The purpose of this design is to prevent the burnt switch from being disconnected, which may cause the danger of power consumption.


Generally, the black mark left by burning can be seen from the surface of the burnt circuit breaker, which generally appears at the position of the terminal. However, it does not rule out that some of the circuit breakers are heated and fused, and the traces are hidden inside, which can not be seen from the outside.


We can try to replace the circuit breaker, but don't forget to check the fault after replacing the circuit breaker


Most of the time, circuit breakers are burned out just because they have reached the end of their life. At this time, it can be solved by replacing the circuit breaker.


Sometimes, the circuit breaker is burned because of short circuit or lightning strike in the circuit. At this time, we need to install lightning protection device in the line, and check the short-circuit fault point before we can continue to use it.


Reset button stuck


The switch installed with leakage protector or over / under voltage release device often has a reset button on it


The original intention of the reset button is to prevent someone from closing the switch by mistake. After the switch trips due to leakage or over or under voltage (too high or too low voltage), the reset button will pop out and jam the handle, making the switch unable to close.


Normally, the reset button is parallel to the circuit breaker housing. When the reset button protrudes, the switch cannot be closed. At this time, we should first check the fault in the line. After the fault is solved, press the reset button to switch on normally.


The problem has not been solved


In both cases, the handle is stuck and cannot be pushed at all. Sometimes, the handle can be pushed, but it will fall down automatically after closing. This kind of problem proves that there is still a fault in the circuit, and the protection function of the circuit breaker is triggered again when the circuit is closed. There are three common faults that have not been eliminated


1. Electric leakage


There are still leakage points in the circuit - sometimes the leakage is not as vigorous as we think, maybe it is just a point that can't be seen by naked eyes on the outer surface of the wire, which will lead to leakage.


At this time, what we need to do is to check the circuit, find the leakage location, and repair and replace the leakage equipment. It is difficult for non professionals to operate, so it is recommended to let electricians come to the door.


2. Overload


Too much current in the line can also cause the switch to trip. At this time, we can reduce the number of electrical appliances in the circuit - first pull out the plug on the socket, and then switch it on, basically no problem.


Pay attention to the total power of the appliance when it is used again in the future. Try not to let multiple electrical appliances work at the same time to avoid tripping again.


3. Short circuit


Short circuit fault is very dangerous, and it is difficult to find the short circuit point. We can start with electrical appliances first - unplug all electrical appliances to see if the short circuit is on the electrical appliances.


After confirming that there is no problem with the appliance, we need to remove all the sockets and observe whether the short circuit position is inside the socket. In particular, users who use flexible wires should pay attention to whether there are burrs at the wire joints. Sometimes only two burrs come into contact, which leads to a short circuit of the whole line.