Common methods of measuring leakage current with multimeter
Regarding the usage of the multimeter, let me talk about how to use the multimeter to measure the leakage current, whether the circuit is leakage, you can use the on-off gear of the multimeter, and judge whether the insulation is not by the resistance value measured on the multimeter, so as to determine whether there is leakage.
How to measure leakage with a multimeter
Requirement: Use the on-off gear of the multimeter, measure the ground and the measured circuit, check whether the meter has a resistance value, and then judge whether it is leakage or insulation.
Insert the multimeter connector into the corresponding terminal for measuring AC, then use one pen to measure the zero line or ground wire, and the other pen to measure the place where leakage is suspected, and look at the value displayed on the multimeter. If it is 0, it means no leakage and no voltage. . If it is 220 or other voltage over 36V, it means there is leakage.
Use a multimeter to measure the insulation resistance at the 200M range, and first determine which wire is leaking, or which two wires are short-circuited.
Common methods of measuring leakage current with multimeter
Measurement methods:
Measure the insulation resistance of the live wire and the neutral wire, measure the insulation resistance of the live wire to the ground wire, and measure the insulation resistance of the neutral wire to the ground wire. If the short circuit insulation resistance is basically zero.
Know which line is leaking, and use the segmented search method to gradually narrow down the scope of the fault. Or use the exclusion method to separate the circuit and conduct a section-by-section energization test.
Precautions:
To measure whether there is leakage in the line, generally use a megohmmeter, that is, a shaker.
When the multimeter is measuring, the voltage across the test leads is very low, generally not exceeding 9v, and it cannot break down the gap and leak electricity, while the megohmmeter can reach more than 1000v.
The above is the method of measuring leakage with a multimeter, I hope it will be helpful to everyone.
