DocumentCode :
1045373
Title :
Dielectric Recovery and Predicted AC Performance of Blown SF6 ARCS
Author :
Perkins, John F. ; Frost, Leslie S.
Author_Institution :
Westinghouse Research Laboratories
Issue :
2
fYear :
1972
fDate :
3/1/1972 12:00:00 AM
Firstpage :
368
Lastpage :
375
Abstract :
The rates of recovery of dielectric strength of gasblasted SF6 arc channels following current interruption have been measured by using the free recovery method. The experiments were performed with upstream arc chamber pressures of 35 psia and 60 psia, with a 1 cm electrode spacing, and 400 ¿s duration square current pulses whose amplitude was varied between 20 A and 1000 A. These arc chamber pressures were sufficient to ensure that critical pressure and sonic velocity occurred near the nozzle throat. An empirical linearization of the recovery characteristics has enabled these dc results to be translated into terms of ac circuits. This has enabled a prediction of ac interruption capability to be determined, assuming that the arc power input does not approach the energy clogging regime.
Keywords :
Circuit breakers; Circuit testing; Current measurement; Dielectric breakdown; Dielectric measurements; Electrodes; Fault currents; Laboratories; Sulfur hexafluoride; Voltage;
fLanguage :
English
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9510
Type :
jour
DOI :
10.1109/TPAS.1972.293217
Filename :
4074726
Link To Document :
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