Line leakage detection method - Schneider

Line leakage detection method, leakage check method summary, if a closing, leakage switch will trip, this kind of front leakage, check the method is as follows:

Line leakage detection method - Schneider

1. Disconnect all the separators, close the main switch, close the separators one by one, close the separators one by one, and the leakage switch will jump, which is the problem with the road

2. Unplug all the electrical appliances, plug in the electrical plugs one by one, and plug in which one causes tripping, which electrical appliance has a problem

3. Turn off all the lights, turn on the lights one by one, and turn on which light causes tripping, that is, there is a problem with the light (or line).

If you close, do not trip immediately, a long time, trip, and the trip time is inconsistent, this kind of zero line leakage, check the method is more professional, use a megohmmeter (if all the socket on the electrical plug will trip, the problem should be on the line)

Method: first disassemble the main zero line, disconnect all the separations, check the zero line of each line one by one with a megohmmeter to insulate the ground, find out the problem line, and then see which electrical appliances are directly wired (such as electric lights or some air conditioners, etc.), do not check it, if you don't care about the electrical appliances, it is a problem with the line, and you can only change the line.

If the wire leaks electricity, a strong electromagnetic inductance line will occur, so you can put a magnetic needle on the paper and place it on the test site, and if the needle direction is deflected, it indicates that there is electricity.

The simplest things are electric pens and multimeters, and it is best to install leakage protectors in home lines.

Due to the long service life of electrical circuits, it will cause insulation aging, insulator damage, moisture or wear of the insulation layer, etc., and leakage will occur on the line. At this time, connect an ammeter on the main knife switch, remove the load, and turn on the load switch.

If the pointer of the ammeter oscillates, it indicates that the line is leaking. cut the neutral line;

If the ammeter pointer remains unchanged, it indicates that there is a leakage between the front and the ground;

If the ammeter pointer returns to zero, it clarifies the leakage between the front and the zero line;

If the ammeter indication becomes smaller, but not zero, it indicates that there is leakage between the front and the neutral line, and between the front and the ground. Remove the shunt fuse or pull the knife switch, and if the ammeter indication remains unchanged, the bus leakage will be indicated; The ammeter indication is zero, and the shunt leakage is clarified; If the ammeter indication becomes smaller, but not zero, it indicates that both the bus and the shunt are leaking. After determining the leakage shunt, pull off the switch of the line sequentially. When a switch is pulled off, the ammeter indication is zero, indicating that the line is leaking; If it becomes smaller, it means that there are other places where the line is leaking; If all the switches are pulled off and the ammeter indication remains unchanged, it indicates that the trunk of the line is leaking.

Line leakage detection method - Schneider

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