Title :
Relationship between circuit-breaker performance and nozzle blocking, contact evaporation and particle production
Author :
Taylor, S. ; Jones, G.R. ; El Kholy, S.M.
Author_Institution :
Dept. of Electr. Eng. & Electron., Liverpool Univ., UK
fDate :
11/1/1994 12:00:00 AM
Abstract :
Thermal reignition performance data for a two pressure SF6 model interrupter are presented with peak currents in the range 45-60 kA. Two different nozzle materials and two different test-circuit configurations have been used. The results show a strong correlation between a premature degradation in interrupter failure and the presence of tungsten particles produced from the upstream contact, and present in the contact gap during the current zero period. The relevance of these considerations to contact designs, commonly used in various high-voltage circuit
Keywords :
circuit breakers; nozzles; sulphur compounds; 45 to 60 kA; SF6; SF6 model interrupter; W; circuit-breaker performance; contact evaporation; high-voltage circuit; interrupter failure; nozzle blocking; nozzle materials; particle production; peak currents; premature degradation; pressure measurement; test-circuit configurations; thermal reignition; tungsten particles; upstream contact;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings -
DOI :
10.1049/ip-smt:19941339
