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Detection method for secondary system of voltage transformer

A technology of voltage transformer and detection method, which is applied in the direction of electric winding test, electrical connection test, instrument, etc., and can solve the problem of inability to fully detect the correctness of the secondary wiring of the voltage transformer, and the inability to detect the triple winding of the voltage transformer around the open triangle pole Sex and other issues to achieve the effect of enhancing reliability

Inactive Publication Date: 2017-05-10
CHINA MCC 2 GRP CO LTD
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AI Technical Summary

Problems solved by technology

The disadvantages of using the conventional voltage transformer secondary system detection method are: (1) the correctness of the secondary wiring of the voltage transformer cannot be completely detected; (2) the polarity of the voltage transformer three times around the open triangle cannot be detected

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  • Detection method for secondary system of voltage transformer
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Embodiment Construction

[0012] Refer to attached figure 2 , The present invention relates to a detection method for the secondary system of a voltage transformer. The primary side of the voltage transformer is connected in parallel, and a single-phase power frequency voltage is added to check the correctness of the secondary connection of the voltage transformer, the polarity of the winding of the tertiary circuit and the three times of the voltage transformer. Open delta wiring correctness. The detection equipment is: one 0-250V single-phase voltage regulator, one 0-400V three-phase digital AC voltmeter, and two 0-400V single-phase digital voltmeters. AC voltage U 0 , simultaneously detect the voltages of Uao, Ubo, and Uco on the secondary side of the voltage transformer, observe whether Uao, Ubo, and Uco are balanced, and measure the open triangle voltage U on the tertiary side of the voltage transformer LN , where: U LN =U a ’+U b ’+U c '=3U a '=3U b '=3U c '.

[0013] The method of the...

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Abstract

The invention relates to a detection method for a secondary system of a voltage transformer, and the method is characterized in that the method comprises the steps: (1), adding a single-phase AC voltage U0 to a primary side of the voltage transformer in a parallel manner; (3), detecting the voltages of Uao, Ubo and Uco from the secondary side of the voltage transformer at the same time, and observing whether Uao, Ubo and Uco reach balance or not; (3), measuring an opening triangular voltage ULN at the third side of the voltage transformer. The method is advantageous in that the method can completely detect the wiring correctness of a secondary system of the voltage transformer; the method can detect the opening triangular polarity and opening triangular voltage of the third side of the voltage transformer; and the method can detect the voltages of secondary measurement windings of the voltage transformer at the same time. The practice proves that the method improves the power supply reliability of the voltage transformer.

Description

technical field [0001] The invention relates to a detection method for a secondary system of a voltage transformer, which belongs to the field of safe power supply. Background technique [0002] Conventional voltage transformer secondary system detection method is: refer to the attached figure 1 , (1) Add U from the primary side of the voltage transformer respectively A , U B , U C . ; (2) Measure U on the secondary side of the voltage transformer respectively a , U b , U c , U LN . The disadvantages of using the conventional secondary system detection method of voltage transformers are: (1) the correctness of the secondary wiring of the voltage transformer cannot be completely detected; (2) the polarity of the triangle around the open triangle cannot be detected three times. Contents of the invention [0003] The purpose of the present invention is to provide a voltage transformer secondary system detection method that can completely check the correctness of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/04G01R31/06
CPCG01R31/67G01R31/72
Inventor 崔海李庆民杨庆文
Owner CHINA MCC 2 GRP CO LTD
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