Title :
Thermal characteristics of RTV silicone rubber coatings as a function of filler level
Author :
Kim, Seog-Hyeon ; Cherney, Edward A. ; Hackam, Reuben
Author_Institution :
Dept. of Electr. Eng., Windsor Univ., Ont., Canada
Abstract :
RTV (room-temperature vulcanizing) silicon rubber is investigated with various levels of alumina trihydrate (ATH) filler. The temperature distribution in the coating during dry band arcing is theoretically determined. The effect of the addition of ATH filler is discussed. It is shown that dry band arcing produces high temperatures (hot spots) which dissociate chemical bonds at the surface. It is suggested that during dry band arcing, the heat energy at the surface penetrates into the bulk of the coating, thereby breaking side groups and the main chain of the polydimethyl silicone molecule
Keywords :
arcs (electric); filled polymers; insulation testing; silicones; ATH filler; RTV silicone rubber coatings; alumina trihydrate filler; chemical bonds; dry band arcing; filler level; hot spots; main chain; polydimethyl silicone molecule; room-temperature vulcanizing; side groups; temperature distribution; thermal characteristics; Arc discharges; Coatings; Conducting materials; Flashover; Heat transfer; Rubber; Surface contamination; Surface resistance; Temperature; Thermal resistance;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283135
