DocumentCode :
998375
Title :
Developing of 550 kV 1-break GCB. I. Investigation of interrupting chamber performance
Author :
Suzuki, K. ; Toda, H. ; Aoyagi, A. ; Ikeda, H. ; Kobayashi, A. ; Ohshima, I. ; Yanabu, S.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
Volume :
8
Issue :
3
fYear :
1993
fDate :
7/1/1993 12:00:00 AM
Firstpage :
1184
Lastpage :
1191
Abstract :
The interrupting chamber for a 550 kV 1-break gas blast circuit breaker (GCB) is developed. To cope with voltages and interrupting capacities of nearly double per break compared with 2-break GCBs, the shape of the interrupting chamber was optimized, and an interrupting chamber scheme using arc energy is employed. Small-current interrupting performance is improved by selecting a nozzle shape with pressure fluctuations due to a supersonic flow at the downstream side of the nozzle and by taking into account the dielectric recovery characteristics. By using an interrupting chamber scheme utilizing arc energy, the opening speed is increased by minimizing the reaction due to pressure rises in the puffer chamber in small-current interruptions, or the pressure is sharply raised due to the effect of arc energy in large-current interruptions. The nozzle shape is also optimized for a large-current interruption by improving the efficiency of treating hot gas.<>
Keywords :
circuit-breaking arcs; gas blast circuit breakers; optimisation; switchgear testing; 550 kV; arc energy; dielectric recovery characteristics; efficiency; gas blast circuit breaker; interrupting chamber performance; interruptions; nozzle shape; opening speed; optimisation; pressure fluctuations; puffer chamber; supersonic flow; switchgear testing;
fLanguage :
English
Journal_Title :
Power Delivery, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8977
Type :
jour
DOI :
10.1109/61.252643
Filename :
252643
Link To Document :
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