Title :
A study of large current interrupting capability of SF6/N2 mixtures
Author :
Song, W.P. ; Yang, D.I. ; Chung, Y.H. ; Kim, D.S. ; Koh, H.S.
Author_Institution :
Hyosung Corporation, Changwon, South Korea
Abstract :
This study aims to analyze the performance of the SF6/N2 mixtures that can be a substitute for SF6 in gas circuit breaker (GCB). The interrupting capability of SF6/N2 mixtures were verified in real GCB with N2 percentage varying from 0 to 50%. We carried out the current interrupting tests of SF6/N2 mixtures by using a 170 kV puffer-type GCB at a laboratory. The results obtained from this study show that a 25% of N2 mixture has an equivalent current-interrupting capability to pure SF6 and a 50% of N2 mixture has lesser capabilities. We will test a 75% of N2 mixture soon and by using the test results, we develop a new-type interrupter of gas mixture.
Keywords :
SF6 insulation; gas blast circuit breakers; insulation testing; nitrogen; pressure measurement; 170 kV; SF6-N2; SF6/N2 mixtures; equivalent current-interrupting capability; gas circuit breaker; large current interrupting capability; puffer pressure measurement; puffer-type gas circuit breaker; Capacitors; Circuit breakers; Circuit testing; IEC standards; Laboratories; Pressure measurement; Sulfur hexafluoride; Switchgear; Transient analysis; Voltage;
Conference_Titel :
Electrical Insulation, 2002. Conference Record of the 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7337-5
DOI :
10.1109/ELINSL.2002.995973
