DocumentCode :
1111959
Title :
Insulation Coordination Qualities of 500-kV SF6 Circuit Breakers
Author :
Sonnenberg, C.F. ; Brado, J.J.
Author_Institution :
Westinghouse Electric Corporation, Trafford, Pa.
Volume :
84
Issue :
10
fYear :
1965
Firstpage :
851
Lastpage :
863
Abstract :
High-voltage laboratory tests on a 500-kV SF6 circuit breaker are discussed and analyzed in terms of insuring effective insulation coordination on a live-tank breaker for either 1550-kV or 1800-kV BIL service. Sixty-cycle, impulse, switching surge, and corona level tests were made at minimum operating (alarm) pressure. Additional tests at 0 psig revealed a 60-cycle withstand in excess of twice line-to-neutral voltage. A uniquely designed horizontal, live-tank, circuit-breaker bushing is presented and shown to have excellent contamination resistance, even when wet. The need for parallel protective gaps is stressed to relieve the current transformer from acting as the coordinating element.
Keywords :
Circuit breakers; Circuit testing; Contamination; Corona; Impulse testing; Insulation testing; Insulators; Laboratories; Sulfur hexafluoride; Surge protection;
fLanguage :
English
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9510
Type :
jour
DOI :
10.1109/TPAS.1965.4766114
Filename :
4766114
Link To Document :
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