TIME CURRENT CHARACTERISTICS AND BREAKING CAPACITY OF EXPERIMENTAL VACUUM FUSES

被引:2
作者
BRECHTKEN, D
KONIG, D
机构
[1] Technical Univ of Darmstadt, Darmstadt, Germany
来源
IEEE TRANSACTIONS ON ELECTRICAL INSULATION | 1993年 / 28卷 / 04期
关键词
Circuit breaking arcs - Design - Electric breakdown - Electric contacts - Electric current control - Overcurrent protection - Quartz - Vacuum technology;
D O I
10.1109/14.231547
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Conventional HV fuses are filled with quartz sand. They have an excellent current-limiting capability, however, they have a zone of an uncertain operation in the low overcurrent range. To overcome this disadvantage, considerations were made to substitute the quartz sand by vacuum. The background of these considerations was the well known excellent arc quenching capability of vacuum switches at current zero. Thus the historical development of the vacuum fuse was strongly influenced by progress in the field of vacuum switches. A vacuum fuse can be designed by inserting a fusible element between the fixed butt contacts (electrodes) of a vacuum chamber. Melting curves and the arc quenching capability at current zero are investigated for a simply designed vacuum fuse with flat contacts. Variables are the current amplitude, the electrode material, the diameter of the fuse wire and the distance between the electrodes.
引用
收藏
页码:642 / 649
页数:8
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