Erosion Characteristics of SF<sub>6</sub> Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement

LAN Lei; CHEN Gong; WEN Xishan; WU Yang

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Erosion Characteristics of SF₆ Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement

更新时间：2025-12-08

- Erosion Characteristics of SF₆ Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement
- Vol. 42, Issue 6, Pages: 1731-1738(2016)
- 作者机构：
  
  武汉大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 June 2016，
  
  Published：2016
- 稿件说明：
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LAN Lei, CHEN Gong, WEN Xishan, et al. Erosion Characteristics of SF₆ Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement[J]. 2016, 42(6): 1731-1738.
DOI：

LAN Lei, CHEN Gong, WEN Xishan, et al. Erosion Characteristics of SF₆ Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement[J]. 2016, 42(6): 1731-1738. DOI：

摘要

为研究SF

断路器在开断过程的触头烧蚀特性

对被试断路器进行了开断30 k A短路电流的烧蚀试验

通过动态电阻测量得到了触头在不同烧蚀程度下的动态电阻–行程曲线

并从曲线中提取了触头状态参数。根据这些参数在触头电寿命过程的变化规律

可以得到:1)动静触头运动存在最小有效接触行程

即14.2 mm;2)触头电阻值存在正常范围

主触头为50

50mW

弧触头为200

00mW;3)每次烧蚀试验中触头烧蚀量不变

为0.318 mm。根据以上结果

分析了断路器在开断电流过程中触头材料损失过程及其对断路器性能的影响

并计算出每次烧蚀试验中触头烧蚀量为0.268 mm

与测量值0.318 mm数量相当

最后初步得出了SF

断路器触头电寿命的预测方法。

Abstract

To study the contact erosion characteristics of SF

circuit breaker during opening operation

the erosion test was conducted on the tested SF

circuit breaker and the dynamic resistance curves as a function of contact travel was obtained in different levels of degradation of contacts by dynamic contact resistance measurement. Some parameters of contact condition were extracted from the curve. According to the variation of these diagnostic parameters

the following results can be obtained. A minimum value of contact travel is obtained to be 14.2 mm.The value of contact resistance has a standard range

which is 50

50 mW for main contact and 200

00 mW for arcing contact.The length decrement of arcing contact is 0.318 mm for

each erosion test. According to these results

we analyzed the contact material erosion process during the opening operation and the impact on the circuit breaker characteristics. Meanwhile

the length decrement of arcing contact for each erosion test is calculated to be 0.268 mm

which is close to the measured value of 0.318 mm. Eventually

the preliminary prediction method for the electrical life of SF

circuit breaker was summarized.

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Related Author

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LI Liying

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Related Institution

Department of Electrical Engineering, Tsinghua University

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Electrical Engineening College,Shenyang University of Technology

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State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University

AI问答

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Erosion Characteristics of SF6 Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement

DOI：

摘要

Abstract

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Erosion Characteristics of SF₆ Circuit Breaker Contacts Based on Dynamic Contact Resistance Measurement