Influence of contact contour on breakdown behaviors in vacuum under uniform field

Author

Liu, Zhiyuan ; Cheng, Shaoyong ; Zhang, Yingyao ; Yang, Lanjun ; Geng, Yingsan ; Wang, Jimei

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an

Volume

1

fYear

2008

fDate

15-19 Sept. 2008

Firstpage

25

Lastpage

28

Abstract

We experimentally investigated influence of contact contour on breakdown characteristics in vacuum under uniform field. Four vacuum interrupters are used and their contact contours are designed to obtain effective area S_eff from 211 mm² to 550 mm². The contact parameters are contact diameter -42.76 mm, contact gap - 6 mm, contact thickness 16 mm and contact material -CuCr50. Basic impulse level (BIL) voltage (1.2times50 mus) voltage is applied. The experimental results show that 50% breakdown voltage U ₅₀ decrease 11% from 248 kV to 221 kV when effective area increase from 211 mm² to 550 mm². O n the other hand, the effective area S_eff has a significant influence on conditioning process. The larger the effective area, the slower the conditioning process.

Keywords

copper compounds; electric breakdown; electrical contacts; vacuum interrupters; CuCr; breakdown behaviors; breakdown voltage; conditioning process; contact contour; contact parameters; impulse level voltage; size 16 mm; size 42.76 mm; uniform field; vacuum interrupters; voltage 248 kV to 221 kV; Conductivity; Contacts; Dielectrics and electrical insulation; Electric breakdown; Interrupters; Laboratories; Optimization methods; Rubber; Silicon; Vacuum breakdown;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2008. ISDEIV 2008. 23rd International Symposium on

Conference_Location

Bucharest

ISSN

1093-2941

Print_ISBN

978-973-755-382-9

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2008.4676708

Filename

4676708