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Checking device for current transformers

A technology for current transformers and calibration devices, which is applied to measuring devices, instruments, and measuring electrical variables, etc. It can solve the problems of outdated current transformer calibration equipment, relying on manual fastening, and loose contact of U-shaped connecting screws.

Inactive Publication Date: 2015-02-25
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, with the continuous increase of business expansion projects, the number of current transformer calibrations is also increasing sharply. Due to the heavy task, the current transformer calibration equipment is outdated, and the old calibration equipment can only calibrate one current transformer at a time. For transformers, the problem of repeated wiring is serious, which takes up a lot of calibration time. In addition, the U-shaped connection screws are not in firm contact, and must be tightened manually

Method used

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  • Checking device for current transformers

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Embodiment Construction

[0005] Embodiments are described in detail with reference to the accompanying drawings. A current transformer testing device, including a plurality of current transformers, all the current transformers penetrate the primary current line at the same time, the secondary terminal of one of the current transformers is connected to the testing circuit, and the secondary terminals of the other current transformers The secondary terminals are short-circuited by a short-circuit wire. The working principle of the present invention is as follows: (1) There are many equipments in the current transformer calibration room, which are relatively old and require daily maintenance. It is also necessary to clean the current transformer calibration room regularly to organize the wiring of the testing equipment, so we are responsible for people, (2) Taking 10 current transformers as an example, short-circuit the secondary terminals of 9 current transformers with high-strength alligator clips; (3)...

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Abstract

The invention discloses a checking device for current transformers. The checking device for the current transformers comprises the multiple current transformers, primary current lines simultaneously penetrate through all the current transformers, a secondary terminal of one current transformer is connected to a checking circuit, and secondary terminals of the other current transformers are shorted through a short-circuit line. The checking device can conveniently and rapidly check the multiple current transformers and effectively improve the checking efficiency of the current transformers.

Description

technical field [0001] The invention belongs to the technical field of current transformer calibration, and in particular relates to a current transformer calibration device. Background technique [0002] At present, with the continuous increase of business expansion projects, the number of current transformer calibrations is also increasing sharply. Due to the heavy task, the current transformer calibration equipment is outdated, and the old calibration equipment can only calibrate one current transformer at a time. For transformers, the problem of repeated wiring is serious, which takes up a lot of calibration time. In addition, the U-shaped connecting screws are not in firm contact, and must be tightened manually. Contents of the invention [0003] The technical problem solved by the invention is to provide a current transformer calibration device which is convenient to use and has high working efficiency. The technical solution of the present invention is: a current t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
Inventor 郭康苏玉娥李琳苏贺庆
Owner STATE GRID CORP OF CHINA