论文信息 - Effects of hot SF/sub 6/ on post-arc circuit breaker design

Effects of hot SF/sub 6/ on post-arc circuit breaker design

SF/sub 6/ is blown through the arc during interruption of an SF/sub 6/ puffer circuit breaker. This hot gas flows down an exhaust tube into the chamber of a dead tank circuit breaker where it can lower the dielectric withstand between the exhaust tube and the tank of the circuit breaker, leading to dielectric breakdown during the transient recovery voltage after clearing. This paper presents experimental evidence that any such breakdown is controlled by the hot gas near the exhaust tube, with cold gas in the remainder of gap having little effect on the breakdown voltage. This experimental conclusion is supported by a detailed theory for conditions under which breakdown can occur.

T. Uchii | S. Nishiwaki | Steven A. Boggs

[1] N. Wiegart,et al. Inhomogeneous field breakdown in GIS-the prediction of breakdown probabilities and voltages. I. Overview of a theory for inhomogeneous field breakdown in SF/sub 6/ , 1988 .

[2] L Rothhardt,et al. Breakdown experiments in diluted SF6 at elevated temperatures , 1985 .

[3] E. Haginomori,et al. Calculation of the uniform breakdown field strength of SF/sub 6/ gas , 1998 .

[4] L. S. Frost,et al. Composition and transport properties of SF 6 and their use in a simplified enthalpy flow arc model , 1971 .

[5] T. Uchii,et al. Analytical approach to SF/sub 6/ breakdown under transient conditions , 2003 .

[6] B Chervy,et al. The influence of the presence of tungsten on arc plasmas , 1996 .

[7] Steven A. Boggs,et al. Tree channel formation in solid dielectrics. Low variance observations and mechanism of formation , 1999, 1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319).

[8] Hisatoshi Ikeda,et al. On the hot gas exhaustion in the exhaust chamber of a gas circuit breaker after short-circuit current interruption , 1997 .