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Pincer-shaped resistive current transformer

A resistive current and transformer technology, applied in the direction of inductors, variable inductors, transformer/inductor cores, etc., to achieve the effect of eliminating interference, easy to use, and strong anti-interference ability

Inactive Publication Date: 2015-06-17
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is obvious interference in the test process at present, the development of a portable live detector for the resistive leakage current of the intelligent clamp arrester has practical significance for the above work

Method used

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  • Pincer-shaped resistive current transformer

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Embodiment Construction

[0016] The following combination figure 1 , a preferred embodiment of the present invention is described in detail.

[0017] Such as figure 1 As shown, the clamp resistive current transformer provided by the present invention includes: a mutual induction unit, and a transmission unit connected to the mutual induction unit; the described mutual induction unit includes: a first iron core 3, which It is connected with the transmission unit and moves under the drive of the transmission unit; the first coil 2 is wound on the outer wall of the first iron core 3; the second iron core 4 is connected with the first iron core 3 An iron core 3 is coaxially arranged at intervals; a second coil 5 is wound on the outer wall of the second iron core 4; wherein, the first coil 2 and the second coil 5 are connected in parallel to output a pincer resistive signal from the current transformer.

[0018] The transmission unit includes: a rack 6, which is fixedly connected with the first iron cor...

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Abstract

The invention discloses a pincer-shaped resistive current transformer which comprises a mutual inductance unit and a transmission unit connected with the mutual inductance unit. The mutual inductance unit comprises a first iron core connected with the transmission unit and driven by the transmission unit to move, a first coil wound around the outer wall of the first iron core, a second iron core coaxially spaced from the first iron core, and a second coil wound around the outer wall of the second iron core, wherein the first coil and the second coil are connected in parallel to output signals of the pincer-shaped resistive current transformer. The pincer-shaped resistive current transformer is suitable for a portable electrification detector of the resistive leakage current of a pincer-shaped intelligent lightning arrester, use is convenient, the effects of signal reliability and high anti-jamming capacity are achieved, and therefore interference generated in the electrification test process of the lightning arrester in a station is reduced and even eliminated.

Description

technical field [0001] The invention relates to a current transformer, in particular to a clamp-type resistive current transformer. Background technique [0002] Metal oxide surge arresters (MOV) are the most widely used surge arresters in substations because of their superior overvoltage protection characteristics. However, the failure of the arrester may cause its explosion and affect the safe operation of the system. Therefore, strict and effective detection and regular preventive tests must be carried out on the arrester in operation. Because the arrester pre-test (especially the three-side arrester of the main transformer) must shut down the main equipment, it will reduce the operational reliability of the equipment, and sometimes the main equipment cannot be shut down due to the limitation of the operation mode, so the arrester cannot be pre-tested on time, so the arrester Uninterrupted testing is particularly important. [0003] Although a variety of technical measu...

Claims

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Application Information

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IPC IPC(8): H01F38/30H01F27/24H01F27/30H01F29/10G01R19/00
Inventor 周彦肖广辉张勇陈晓锋邵峰郑佳
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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