Clamp Ammeter is a practical electrician tool for measuring low-voltage lines. Its main characteristics are high precision and good stability. Electric power workers can be used to detect low-voltage current, micro current and equipment leakage, and test whether the main line is stealing electricity. This paper introduces clamp Ammeter inspection, electricity theft and leakage detection

Use a clamp Ammeter to measure the leakage current in the main line, and then turn off the electrical equipment in turn. Use a clamp Ammeter to detect the change of the leakage current of the line to find the leakage equipment. If all the electrical equipment has been turned off, but the clamp Ammeter still shows that there is leakage current, it should be that there is leakage current in the low-voltage line, and the line should be replaced or the leakage point should be detected

At the distribution transformer, disconnect the neutral line at the outgoing line side of the low-voltage line contactor, take out the fuse and install it on one of the phase lines, measure the phase with a clamp Ammeter, and the measured current is the leakage current of the phase. Test the leakage current of other phase lines in sequence

When the low-voltage line is energized, the single phase line and the neutral line shall be placed in the jaw of the clamp Ammeter at the same time during detection, and the three phase lines and the neutral line shall also be placed in the jaw at the same time. If there is no leakage fault, then the phasor sum of the load current magnetic flux is zero, and the clamp Ammeter indication is also zero; If there is leakage current, the clamp Ammeter can detect the leakage current.

Clamp the live and zero wires together to measure the leakage current of electrical equipment. (Note 2 pieces)

Clamp the three-phase and four wires together to test the total leakage current. (Note 4 pieces)