Degradation in Insulation Strength after High-Current Interruption in Vacuum Interrupters

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Degradation in Insulation Strength after High-Current Interruption in Vacuum Interrupters

更新时间：2025-04-26

- Degradation in Insulation Strength after High-Current Interruption in Vacuum Interrupters
- High VoltageApparatus Issue 5, Pages: 8-11(1994)
- 作者机构：
  
  1. 华中理工大学
  2. 华中理工大学武汉430074
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM561.5
- Published：1994
- 稿件说明：
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[1]何俊佳,邹积岩,张汉明,李正新.真空灭弧室开断大电流后的绝缘劣化[J].高压电器,1994(05):8-11.

Degradation in Insulation Strength after High-Current Interruption in Vacuum Interrupters[J]. High voltageapparatus, 1994, (5): 8-11.
[1]何俊佳,邹积岩,张汉明,李正新.真空灭弧室开断大电流后的绝缘劣化[J].高压电器,1994(05):8-11. DOI：

Degradation in Insulation Strength after High-Current Interruption in Vacuum Interrupters[J]. High voltageapparatus, 1994, (5): 8-11. DOI：

摘要

通过实验研究了三种不同触头材料的真空灭弧室在作大电流开断操作后冲击耐压水平的下降情况后发现

随着开断电流的增大

弧后冲击耐压水平逐渐降低.当开断电流接近真空灭弧室的极限开断电流时

冲击绝缘水平有较大幅度的下降;采用工频电压作用下的高压火花老炼处理

可以使尚未达到电寿命极限的真空灭弧室的冲击耐压水平基本得到恢复.

Abstract

The reduction in impulse withstanding voltage level of vacuum in-terrupters of three types with different contact materials after interruption of high currents is investigated on the basis of experiments. It is found that with increasing of the breaking currents

the postarc impulse withstanding voltage become low; as the current approaches the breaking current limit of the vacuum interrupter

an abrupt decrease occures. By means of HV a. c. spark conditioning

the impulse withstanding voltage level can be basically recovered for vacuum interrupters which have not reached their electric withstanding life limit.

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