Multi-range standard voltage transformator

Abstract

The invention relates to a multi-range standard voltage transformator for detecting the voltage error of a voltage transformator for a power system; an auxiliary transformator is arranged on a main voltage transformator; the main voltage transformator comprises a main secondary winding and an additional secondary winding; the additional secondary winding is serially connected with a primary winding of the auxiliary transformator; an initial outgoing wire and a plurality of output taps are arranged on the main secondary winding of the main voltage transformator; the initial outgoing wire is serially connected with the secondary winding of the auxiliary transformator; and the respective combination of the initial outgoing wire with the taps output by the main secondary winding realizes the multiple ranges of the standard voltage transformator. The multi-range standard voltage transformator adopts the auxiliary transformator to compensate the error so that the precision level reaches above 0.01, is used for detecting the error of voltage transformators with the precision level being 0.2 and below, not only meets the detection requirements of multiple ranges and high precision, but also is convenient to detect, reduces the cost, and is applicable to the error detection of the voltage transformators with different voltage levels from 3kV to 35kV.

Description

technical field [0001] The invention relates to the field of electromagnetic technology, in particular to a multi-range standard voltage transformer, which mainly corresponds to the detection of the voltage error of the 3-35kV voltage transformer used in the power system. Background technique [0002] In order to ensure the measurement accuracy of the voltage transformer in the power system, a standard voltage transformer is generally used to detect the measured transformer. The detection of the voltage error of transformers with different voltage levels needs to use standard voltage transformers with different voltage ratios for comparison and detection. At present, the standard voltage transformer used for voltage error detection includes a small range. Generally, a standard voltage transformer used for detection includes a voltage level, and can only detect the voltage error of a voltage level transformer. When detecting another When there is a voltage error of the volta...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the standard voltage transformer in the prior art, which can only detect the voltage error of a voltage level transformer, cannot meet the requirements of testing multiple voltage levels, has a single test function, and has high cost of use, the purpose of the present invention is to provide A multi-range standard voltage transformer with simple structure, using a standard voltage transformer to detect voltage errors of voltage transformers of different voltage levels, reducing repeated investment, low cost, reduced detection time, and high voltage error detection accuracy

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