Title :
Sparks in SF6 and SF6/CF4 atmospheres: impact on metallic and insulating surfaces [in HV circuit breakers]
Author :
Trudeau, M.L. ; Fréchette, M.F. ; Larocque, R.Y.
Author_Institution :
IREQ, Varennes, Que., Canada
Abstract :
Solid materials (copper and Teflon) used in HV circuit breakers were exposed to a closely spark discharge in SF6 and SF6 /CF4 mixtures. The surface of the different samples was studied using X-ray photoelectron spectroscopy to reveal possible interactions with the by-products. Results show that discharging in SF 6 and SF6/CF4 mixtures produces active species, mainly F-groups, which exhibit strong interactions with metallic surfaces. The surface modification due to the discharge processes was found to be less apparent in the case of insulating materials
Keywords :
SF6 insulation; X-ray photoelectron spectra; circuit breakers; electric breakdown; insulation testing; sparks; surface discharges; switchgear testing; Cu; F-groups; HV circuit breakers; SF6; SF6 atmosphere; SF6/CF4 atmosphere; Teflon; X-ray photoelectron spectroscopy; active species; by-products interaction; discharge processes; insulating materials; insulating surfaces; metallic surfaces; surface modification; Atmosphere; Circuit breakers; Copper; Insulation; Sparks; Sulfur hexafluoride; Surface charging; Surface cleaning; Surface discharges; Voltage;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549474
