Analysis of a 24 kV CT Failure

HU Liang-rong; YIN Xiao-gang; LUO Hu

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Analysis of a 24 kV CT Failure

更新时间：2025-04-26

- Analysis of a 24 kV CT Failure
- High VoltageApparatus Issue 2, Pages: 137-138(2006)
- 作者机构：
  
  1. 西安高压电器研究所有限责任公司
  2. 西安高压电器研究所有限责任公司陕西西安 710077
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM452
- Published：2006
- 稿件说明：
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[1]胡良蓉,殷晓刚,骆虎.一起24 kV电流互感器的故障分析[J].高压电器,2006(02):137-138.

HU Liang-rong, YIN Xiao-gang, LUO Hu. Analysis of a 24 kV CT Failure[J]. High voltageapparatus, 2006, (2): 137-138.
[1]胡良蓉,殷晓刚,骆虎.一起24 kV电流互感器的故障分析[J].高压电器,2006(02):137-138. DOI：

HU Liang-rong, YIN Xiao-gang, LUO Hu. Analysis of a 24 kV CT Failure[J]. High voltageapparatus, 2006, (2): 137-138. DOI：

摘要

通过对一起电流互感器损坏事故进行检查及事故原因分析

提出造成该事故原因是电流互感器的质量问题

即由于气泡的存在导致局放量增加

最后引发击穿。为了避免类似事故的发生

应对电流互感器进行两档局放试验

对线电压下局放不合格的产品

要密切关注其运行情况

或作进一步的探伤检查;对于在1.2倍相电压下局放不合格的产品

建议退出运行;对发生过大电流短路故障的产品应作局放试验

对局放量偏大的产品

建议退出运行或作进一步的探伤检查。

Abstract

In this paper

a CT accident is inspected

and the cause of the accident is analyzed. Air bubble in CT is considered to be the reason of the accident

which cause increase of the partial discharge （PD）

and induce breakdown. In order to avoid this kind of accident

PD test should be carried out. The products

which PD levels are not within the specified value under 1.2 times of the phase voltage

should be out of service. The products

which PD levels are not within the specified value under the line voltage

should be paid more attention to on its operation situation

or be made the further flaw inspection. The products

on which short circuit accident of large current occurred

the PD test should be carried out

and those

which PD level are within the specified value

should be out of service

or be made the further flaw inspection.

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Related Institution

School of Electric Power Engineering, South China University of Technology

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