Title :
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.
fDate :
6/1/2007 12:00:00 AM
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;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2007.369509
