Effect of contact surface on non-sustained disruptive discharge phenomena after current interruption in vacuum

Author

Tanaka, Hitoshi ; Yanabu, Satoru

Author_Institution

Tokyo Denki Univ.

Volume

14

Issue

3

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

532

Lastpage

537

Abstract

Non-sustained disruptive discharge (NSDD) sometimes occurs when the voltage is applied for a certain time between vacuum gaps after the current is interrupted. However the mechanism of NSDD has not yet been clarified. We conducted a study to clarify this phenomenon using the contact materials CuCr, CuW, and AgWC. We applied a voltage (20[kV]-30[kV]) of AC 50(Hz) after current interruption (1 (kArms|-8 |kArms]), and checked the generating frequency of NSDD. After the current interruption test, we measured the contact surface roughness and field emission current. The result showed that surface roughness and field emission current are not related to this phenomenon and also that CuCr (melt) showed the best performance in all tests.

Keywords

chromium alloys; copper alloys; field emission; materials testing; silver alloys; surface roughness; tungsten alloys; vacuum breakdown; 1 to 8 kA; 20 to 30 kV; 50 Hz; AgWC; CuCr; CuW; NSDD; contact surface effect; current interruption test; field emission current; nonsustained disruptive discharge phenomena; surface roughness; vacuum gaps; Circuits; Contacts; Electrodes; Frequency; Rough surfaces; Surface discharges; Surface roughness; Switches; Testing; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2007.369509

Filename

4225325