Study on the Influence of Arc Before Factors on the Arc Forming Process of SF6 Circuit Breaker

doi:10.11985/2018.12.003

Abstract

Abstract:

An actual SF₆ circuit breaker chamber is adopted as the model in this paper. By gas dynamic equations and collisions between charged particles, the generation, development and variation processes of arc plasma at the break of 3mm are studied from a microscopic view before the breaking of liquid metal bridge and stable arc formation. Effects of the content of metal vapor produced by high breaking current and secondary electron emission coefficient produced by different electrode materials on the microscopic parameters of arc plasma in arc before process are studied here. This simulation can provide the basic theory data for the steady-state arc research, and has certain significance for the development of high voltage switchgear.

Key words: SF₆ circuit breaker, arc, microscopic, arc before process

CLC Number:

TM561.3

Li Jing,Wang Aofei,Fan Xiaomin,Chen Yang. Study on the Influence of Arc Before Factors on the Arc Forming Process of SF₆ Circuit Breaker[J]. Journal of Electrical Engineering, 2018, 13(12): 14-18.

Figures/Tables 9

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References 7

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序号	方程	粘附系数
1	吸附	e + SF₆=> SF₅-
2	吸附	e + SF₆=> SF₆-
3	吸附	e + SF₆=> SF₆-
4	激发	e + SF₆=> e + SF₆s
5	伪弹性	e + SF₆s => e + SF₆
6	激发	e + SF₆=> e + SF₆s
7	伪弹性	e + SF₆s => e +SF₆
8	激发	e + SF₆=> e + SF₆s
9	伪弹性	e + SF₆s => e + SF₆
10	激发	e + SF₆=> e + SF₆s
11	伪弹性	e + SF₆s => e + SF₆
12	激发	e + SF₆=> e + SF₆s
13	伪弹性	e + SF₆s => e + SF₆
14	电离	e + SF₆ => 2e + SF₆+

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Study on the Influence of Arc Before Factors on the Arc Forming Process of SF₆ Circuit Breaker

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