Novel leakage current measuring device and method

Abstract

The invention provides a novel leakage current measuring device and a method thereof. The device is characterized in that the device comprises an A-phase current transformer, a B-phase current transformer, a C-phase current transformer, a zero line current transformer, an A-phase current transformer secondary line, a B-phase current transformer secondary line, a C-phase current transformer secondary line, a zero line current transformer secondary line, a measurement current transformer and a measurement terminal; the A-phase current transformer, the B-phase current transformer, the C-phase current transformer and the zero line current transformer are respectively installed on an A phase, a B phase, a C phase and a zero line of a line to be measured; the A-phase current transformer secondary line, the B-phase current transformer secondary line, the C-phase current transformer secondary line and the zero line current transformer secondary line penetrate through holes of the measurement current transformer. According to the invention, the leakage current of the original line is calculated by measuring the induced current of the current transformer, so the problem that a transformer isdifficult to sleeve to measure the leakage current due to overlarge line distance of the low-voltage 400V overhead line is solved.

Description

technical field [0001] The invention relates to the problem of leakage current measurement of low-voltage 400V overhead lines, in particular to a novel leakage current measurement device and method thereof. Background technique [0002] The way to measure the leakage current of the existing low-voltage 400V line is: if it is a three-phase line, use a current transformer to cover the four wires of phase A, phase B, phase C and the neutral line together. It is the size of the leakage current; if it is a single-phase line, also use a current transformer to put the live wire and the neutral wire together, and the measured current size is the size of the leakage current. This method has certain difficulties in the actual operation process, that is, the distance between the phases of the 400V overhead line is very large, and it is difficult to put them together. If you want to use a current transformer on it, the current transformer needs to be very large and heavy. , the line ca...

AI Technical Summary

Problems solved by technology

This method has certain difficulties in the actual operation process, that is, the distance between the phases of the 400V overhead line is very large, and it is di

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