A method for synchronous calibration of phase and neutral lines of single-phase ammeter

Abstract

The present invention discloses a method for synchronously calibrating the phase and neutral lines of a single-phase ammeter, wherein a current transformer is connected in series to a current source and the phase line loop of an electric energy meter; the transformation ratio of the current transformer is 15:1; and the secondary-side induced current of the current transformer is connected to the neutral line loop of the electric energy meter. In the method disclosed by the present invention, current passes through the phase line loop and the neutral line loop of the electric energy meter at the same time; when calibrating the electric energy meter, it is only necessary to connect the current source of the calibration table to the phase line loop of the electric energy meter to calibrate the phase and neutral lines simultaneously. The calibration process of the calibration table only needs to be executed once, the calibration method is simple, and the production efficiency of the electric energy meter is improved.

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