How to measure a line or piece of equipment's leaking problem using a multimeter
As an indispensable measuring instrument for electricians, the multimeter can measure many physical quantities such as voltage, current, resistance, and capacitance. Therefore, the multimeter plays a very important role in measuring lines and repairing circuits. How to use a multimeter to measure the leakage fault of a line or equipment.
What is leakage
Leakage is because the insulation layer of the wire is damaged and there is an electrical connection between the electrical shell equipment, which causes the current in the wire to "leak". The occurrence of leakage will cause relatively great danger, and it is very easy to cause electric shock accidents for operators of the machine. In this respect, we often use leakage protectors to protect the circuit.
What gear should the multimeter use to measure leakage
How to check when the leakage accident occurs? This is a problem that many friends are concerned about. Let me talk about my views on this problem. For such a problem, the first thing we think of is to use a multimeter to detect whether there is a leakage fault in electrical equipment. I think there are two detection methods, one is the resistance method; the other is the voltage method.
1. Resistance method to detect leakage faults
When detecting leakage faults by the resistance method, first cut off the power supply of the electrical equipment. We can use the RX10K gear of the pointer multimeter. If it is a digital multimeter, it can be set on the 200M gear. Use one test lead of the multimeter to touch the circuit of the live line (phase line), and then use another test lead to touch the metal shell of the equipment. Under normal circumstances, the pointer of the multimeter should display infinite resistance. up.
