Distribution property of transient recovery voltage of vacuum switch with multi-break during short-circuit current interruption

2012 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2012-09-01 DOI:10.1109/DEIV.2012.6412496

C. Xian, Duan Xiongying, G. Guowei, Liao Minfu, Z. Jiyan

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Abstract

Voltage distribution relation of vacuum switch (VS) with multi-break determined its breaking capacity in certain degree. The distribution properties of transient recovery voltage (TRV) and dielectric recovery characteristics of vacuum switch are studied by experiment in this paper. The experimental prototype is set up. The voltage distribution of the interrupters with grading capacitors and without grading capacitors is compared. When three interrupters parallel connect different grading capacitors, short-circuit current is interrupted under the conditions of three interrupters contacts synchronous or asynchronous parting. The experimental results show that successful interruption mostly due to the good voltage sharing in the dielectric recovery process. The voltage distribution is mainly decided by interrupters' arc resistances in the dielectric recovery process, whereas it is decided by their equivalent capacitance after the dielectric recovery process. Therefore, high controllability actuator and proper grading capacitors are important factors for multi-break vacuum switch to interrupt successfully.

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短路电流中断时多断路真空开关暂态恢复电压的分布特性

多分断真空开关的电压分布关系在一定程度上决定了其分断能力。本文通过实验研究了真空开关的暂态恢复电压分布特性和介电恢复特性。建立了实验样机。比较了带分级电容器和不带分级电容器的断流器的电压分布。当三个断流器并联不同等级的电容器时，在三个断流器触点同步或异步分离的情况下，短路电流被切断。实验结果表明，中断的成功主要是由于介质恢复过程中良好的电压共享。电压分布主要由断电源在介质恢复过程中的弧阻决定，而由断电源在介质恢复过程后的等效电容决定。因此，高可控性的执行机构和合适的分级电容器是多断真空开关成功断开的重要因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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