A low-voltage current transformer uninterrupted verification system and method

Abstract

The invention provides a low-voltage current transformer non-stop verification system and method, belonging to the technical field of low-voltage current transformers, including connecting the low-voltage current transformer and the primary side of a standard current transformer in series, and then connecting the two in parallel to a current booster The output winding of the current booster is connected in parallel with the phase-shifting power supply, and the secondary side of the low-voltage current transformer and the standard current transformer is connected to the digital transformer calibrator. The present invention verifies the error of the low-voltage current transformer according to the requirements of the verification regulations under the condition of the low-voltage line without power failure, solves the problem that the current low-voltage current transformer cannot be accurately measured under the condition of the line without power failure, and solves the error situation that cannot be verified under different current values To ensure the fairness of measurement.

Description

technical field [0001] The invention relates to the technical field of low-voltage current transformers, in particular to a low-voltage current transformer non-stop verification system and method. Background technique [0002] The low-voltage current transformer is an important part of the electric energy metering device. It is used to provide current signals with an accurate proportional relationship with the primary circuit for electrical measurement, electric energy metering, and automation devices, and plays an important role in terminal electric energy metering. [0003] Most of the electric energy meter in the electric energy metering device measures the electric energy by collecting the signal of the transformer. Therefore, the accuracy of the transformation ratio of the current and voltage of the transformer directly determines the accuracy of the electric energy measurement. At the same time, the transformer also plays the role of providing signals and high-voltage ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a low-voltage current transformer non-stop verification system and method. Under the condition of low-voltage line non-stop power supply, error verification is performed on low-voltage current transformers in accordance with the verification regulations to solve the current problems. The problem that the low-voltage current transformer cannot be accurately measured under the condition of no power outage of the line solves the problem that the error cannot be verified under different current values, and ensures the fairness of measurement

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