How to use a multimeter to check if a fridge is leaking or short-circuiting
1. Your home "socket" circuit of the "soft breakdown" phenomenon. The method of judgement is in the power outage, with 500V shaking table (megohmmeter) to check the "zero line" and "fire" between the insulation, the insulation resistance of the minimum shall not be less than 0.5 megohms.
2. your home "socket" circuit has a slight leakage phenomenon, check the way is your home "socket" circuit "zero wire" and "fire wire The way to check this is to remove the "zero wire" and "fire wire" of the "socket" circuit in your home, and then connect to any other switch with the same capacity in the distribution box, and close the gate, and if the switch no longer trips, then there is a slight leakage phenomenon in the "socket" circuit in your home. If the switch still trips after closing, it is a "soft breakdown" phenomenon of the "socket" circuit at your home.
3. Your home "socket" circuit leakage protection switch has a problem, you can change a try.
Finally give you a piece of advice; do not listen to those who do not understand the electrical said that, blind switch capacity for large, otherwise there is a danger.
1. Are there any electrical appliances with large loads?
2. If not, then there must be a short circuit in something. It's a problem on the line, maybe you have a short circuit in the line somewhere in your house, ask an electrician to check it in your house. Then there is a short circuit somewhere!!!! Check properly Bad switch, short circuit, leakage I don't know when you renovate, whether you have changed the line, if laying cable is not wearing a protective tube, this problem may occur. This problem has two possibilities: load overload; line short circuit. Personally feel that the biggest possibility is that the leakage switch has a problem, because you mentioned that the main switch also followed the jump, the reason for the main switch jump is the current is too large, if it is an electrical leakage will not be a few minutes to you to say before jumping, it should be in the moment: that is, 20ms-40ms between the leakage switch to change the try ah, it may be that its internal insulation is not good ^_^
My home has encountered a similar situation, the electrician to come, tighten the wires in the distribution box is OK. It's easy, isn't it? First you unplug everything. Then you unplug all the gates in the switchboard except the mains. Then you close each gate individually. If that one trips, that's where the problem is. Leave the one that jumps open. The rest will work. Then get a professional to look at it. Socket unplugged are tripped, that is not overloaded, check the trip switch will not be bad, and then look at the circuit whether there is a short-circuit, and then is the wire aging leakage. Thunder is also related to Oh, in addition to the main switch all the switch off, will be all the power things are stopped . See if the main gate will jump. Will: the main gate is bad, the line in the distribution box is bad. Will not: then try the branch gate, will close each branch gate one by one, if that way to jump that means that the problem is there.
Focus on the fault area in the kitchen and bathroom. Equipment: washing machine, refrigerator, air conditioning, water pump. Most likely, the wires have been chewed through by mice and cockroaches, grounded, and shorted. Then we need to check it properly, and if necessary, ask the power supply bureau to replace the fuse with a thicker one.
