DocumentCode :
2195960
Title :
A test method for 50 Hz interruption capability of contact materials for vacuum interrupters
Author :
Wilkening, E.-D. ; Lindmayer, M. ; Reininghaus, U.
Author_Institution :
Inst. fur Elektrische Energieanlagen, Tech. Univ. Braunschweig, Germany
Volume :
1
fYear :
1996
fDate :
21-26 Jul 1996
Firstpage :
332
Abstract :
This investigation method allows an excellent comparison of the interruption behavior of contact materials in real vacuum tubes by using small cylindric contact samples (12 mm diameter) in a special experimental setup. The described investigations were carried out with different CuCr materials in an ultra high vacuum test vessel. For the test an apparent current density similar to the stress in real switches is applied to the contact materials of reduced size. A high current circuit with a current of 10.7 kA peak is used for the interruption check. After current zero a Weil-Dobke voltage superposition circuit applies a transient recovery voltage (up to 36 kV, 41 KHz) to the open gap to test the restrike behavior. From the measured data the percentage of successful interruptions of the total number of tests and the reignition times were taken as quality criteria. Compared to interruption capacity measurements with real breakers the results of the developed test method show very similar rankings of different variants of contact materials
Keywords :
chromium alloys; copper alloys; electrical contacts; restriking voltage; switchgear testing; vacuum circuit breakers; vacuum interrupters; vacuum tubes; 10.7 kA; 12 mm; 36 kV; 41 kHz; 50 Hz; CuCr; CuCr materials; Weil-Dobke voltage superposition circuit; apparent current density; contact materials; cylindric contact samples; high current circuit; interruption capability; interruption capacity measurements; open gap; reignition times; restrike behavior; transient recovery voltage; ultra high vacuum test vessel; vacuum interrupters; vacuum tubes; Circuit breakers; Circuit testing; Contacts; Dielectrics and electrical insulation; Interrupters; Materials testing; Plasma measurements; Switches; Transient analysis; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1996. Proceedings. ISDEIV., XVIIth International Symposium on
Conference_Location :
Berkeley, CA
Print_ISBN :
0-7803-2906-6
Type :
conf
DOI :
10.1109/DEIV.1996.545376
Filename :
545376
Link To Document :
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