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Sampling device for pincer-shaped resistive current transformer

A resistive current and sampling device technology, applied in the direction of inductors, measuring devices, transformers/inductor coils/windings/connections, etc., to achieve the effects of eliminating interference, reliable signals, and strong anti-interference ability

Active 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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  • Sampling device for 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 sampling device for the clamp-type resistive current transformer provided by the present invention adopts a double-core transformer structure, which includes: a first iron core 1; a first coil 3 wound on the first coil 3 On the outer wall of an iron core 1; the second iron core 2, which is arranged side by side with the first iron core 1 to form a double iron core; the second coil 4, which is wound on the outer wall of the second iron core 2; The third coil 5 is wound on the outer wall of the double iron core; wherein, the forward end of the same name of the first coil 3, the forward end of the third coil 5 of the same name and the opposite end of the second coil 4 connected to the homonym end; the reverse homonym end of the first coil 3, the reverse homonym end of the third coil 5 and the forward homonym end of the secon...

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Abstract

The invention discloses a sampling device for a pincer-shaped resistive current transformer. The sampling device comprises a first iron core, a first coil wound around the outer wall of the first iron core, a second iron core arranged in parallel to the first iron core to form double iron cores, a second coil wound around the outer wall of the second iron core, and a third coil wound around the outer walls of the double iron cores, wherein the forward dotted terminal of the first coil, the forward dotted terminal of the third coil and the reverse dotted terminal of the second coil are connected; the reverse dotted terminal of the first coil, the reverse dotted terminal of the third coil and the forward dotted terminal of the second coil are connected. The sampling device is suitable for a portable electrification detector of the resistive leakage current of a pincer-shaped intelligent lightning arrester, the sampling device can be used without power failure, 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 sampling device for a current transformer, in particular to a sampling device suitable for 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 impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/30H01F27/30H01F27/28G01R19/00
Inventor 卢慧清盛守贫张勇王勤陶燕王一鸣
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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