The influence of electrode material on delayed discharges in vacuum interrupters

Author

Ding, Bingjun ; Wang, Yaping ; Yang, Zhimao ; Ni, Shilong ; Wang, Chenglin ; Cui, Wei ; Chen, Junping

Author_Institution

State Key Lab. for Mech. Behavior of Mater., Xi´´an Jiaotong Univ., China

Volume

6

Issue

6

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

913

Lastpage

915

Abstract

In this paper, the influence of contact materials on late discharges in vacuum switching devices was investigated. Experimental results show that the HV withstand capability of contact materials has a strong influence on the frequency of late discharges in vacuum switching devices. The addition of a small amount of W and Co into the CuCr alloy increases the voltage withstand significantly, resulting in a reduction of the frequency of late discharges by as much as 50%. Therefore, an efficient approach to decrease the frequency of late discharges is to increase the HV withstand of the contact materials

Keywords

chromium alloys; cobalt alloys; copper alloys; discharges (electric); electrical contacts; tungsten alloys; vacuum interrupters; 35 kV; Co addition; CuCr; CuCr alloy; CuCrWCo; HV withstand capability; W addition; contact materials; delayed discharges; electrode material; late discharge frequency; rated voltage; vacuum interrupters; vacuum switching devices; voltage withstand; Chromium; Contacts; Delay; Electrodes; Frequency; Powders; Scanning electron microscopy; Surface discharges; Surface morphology; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.822038

Filename

822038