Low-voltage current transformer for metering supervision

A low-voltage current and transformer technology, applied in the field of electrical measurement, can solve problems such as economic loss, influence on power grid safety, and inability of supervisors to make accurate judgments, and achieve good reproducibility, stability, and fluctuation variation

Pending Publication Date: 2020-12-18
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the rapid increase in the detection volume of each metering center, the complexity of the production line has increased accordingly. The fault point analysis and verification detection conclusions of electric energy measuring instruments are automatically generated by the system, without manual intervention in the whole process. Traditional manual supervision and management methods exist. Hystere

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  • Low-voltage current transformer for metering supervision
  • Low-voltage current transformer for metering supervision

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Embodiment Construction

[0019] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0020] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a low-voltage current transformer for metering supervision, which belongs to the technical field of electric measurement. The transformer comprises an iron core, a secondary winding and a magnetic conductive ring, the secondary winding is wound on the iron core, and the iron core wound with the secondary winding is solidified and placed in the magnetic conductive ring; andthe secondary winding is connected with an automatic verification system of the low-voltage current transformer for metering. The accuracy level of the device is higher than that of a common low-voltage current transformer and can reach 0.02 level or 0.05 level, and the device has good reproducibility, stability and lifting variation and can be used for intermediate check and quality monitoring ofthe automatic verification system of the low-voltage current transformer, so that the measurement process of the automatic verification system is always in a statistical control state.

Description

technical field [0001] The invention relates to the technical field of electric measurement, and more specifically, relates to a low-voltage current transformer for metering supervision. Background technique [0002] Low-voltage current transformers for metering are installed on low-voltage power lines of 0.4kV and below to provide current for metering and other secondary equipment for metering purposes. The commonly used accuracy levels are: 0.2, 0.5S, 0.2S Wait. With the rapid development of my country's power industry, the usage of metering transformers has increased simultaneously. The traditional manual method of verifying electric energy measuring instruments has low work efficiency and high operating costs, and it is difficult to ensure that the verification standards and verification results are highly consistent. At present, the State Grid Corporation of China has built 172 automated verification systems for measuring equipment in 27 provinces across the country t...

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Application Information

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IPC IPC(8): H01F38/30H01F27/30G01R19/00
CPCH01F38/30H01F27/303G01R19/00
Inventor 王雪古雄姚腾姜春阳周峰雷民项琼吴良科彭淑华杨洪肖凯徐晨陈泽远赵威程奔
Owner CHINA ELECTRIC POWER RES INST
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