Behaviour and Effect of Arc Clogging in Arc Chamber with SF6/N2[J]. High voltageapparatus, 1993, (6): 19-22.DOI:
SF6/N2混合气体灭弧室中电弧阻塞效应的分析研究
摘要
分析研究了SF
6
/N
2
混合气体电弧阻塞现象。结果显示
相同电弧电流下
SF
6
/N
2
混合气体弧柱和热边界区直径分别大于SF
6
气体
在电流半波中阻塞时间延长。此外
混合气体电弧能量密度高于SF
6
而弧柱焓流率则低于SF
6
的相应值
因而在电流峰值附近更易造成能量在上游的聚积
使电弧对喷口的阻塞作用加强
影响灭弧与介质恢复过程。为了提高混合气体灭弧室的气吹灭弧能力
应对灭弧室结构参数和其他工作条件重新予以调整和确定。
Abstract
The behaviour of arc clogging with the medium of SF6/N2 mixtures has been investigated
The diameters of both arc column and the thermal boundary region of arc are larger for SF6/N2 than that for SF4.This results in that the duration of arc clogging is longer for SF6/N2 in the current cycle.Also there are a large value of ph and a less value of pob.for SF6/N2.The effect of arc clogging are strengthened further and might be harmful to the arc extinction under this condition.In order to increase the interrupting capability of GCB with SF6/N2 mixtures the configuration of arc chamber should be modified.