INSULATION CHARACTERISTICS AND WELDING BEHAVIOR OF VACUUM SWITCH CONTACTS MADE FROM VARIOUS CUCR ALLOYS

被引：13

作者：

BALLAT, J

KONIG, D

机构：

[1] Techn. Univ. of Darmstadt, Darmstadt, HV Laboratory

来源：

IEEE TRANSACTIONS ON ELECTRICAL INSULATION | 1993年 / 28卷 / 04期

关键词：

Chromium alloys - Composition effects - Copper alloys - Dielectric properties - Electric breakdown - Electric circuit breakers - Electric contacts - Performance - Vacuum technology - Welding;

D O I：

10.1109/14.231545

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：

CuCr is generally accepted and applied as contact material in vacuum switches. Although CuCr has many well-known advantages it has, compared to CuBi, the disadvantage of welding more easily at high current-closing operations of circuit breakers. Thus, a currentless separation of the welds occurring after closing operations affects the dielectric properties of the open contact gap. In this paper welding forces as well as field enhancement factors beta and breakdown voltages of the contacts after currentless opening are investigated and used as diagnostic tools in order to study the influence of different CuCr compositions and manufacturing processes on the performance of butt-type contacts installed in a model vacuum breaker chamber.

引用

页码：628 / 634

页数：7