Title :
Effects of water salinity, electric stress and temperature on the AC and DC flashover voltages of polytetraflouroethylene
Author :
Syed, H.Z. ; Hackman, R.
Author_Institution :
Dept. of Electr. Eng., Windsor Univ., Ont., Canada
Abstract :
The effects of aging of polytertraflouroethylene (PTFE) by immersion in a saline solution at different temperatures and for different durations on the AC and DC flashover voltages in air at 1.01×105 Pa and 21.5±3°C are reported. The PTFE specimens were immersed in 10 mS/cm saline solutions, of water and were kept at 0±1.5°C, 21.5±3°C, 44±1.5°C and 98±2°C for duration of up to 125 days. The AC (60 Hz) and DC flashover voltages were measured after 10, 23, 45, 100 and 125 days of immersion. The flashover voltage was found to decrease with increasing immersion time and increasing temperature of the solution. The contact angle, the average surface roughness and the change in the weight of specimens due to the uptake of water were also measured and correlated with the AC and DC flashover voltages
Keywords :
ageing; flashover; insulation testing; organic insulating materials; polymers; surface topography measurement; voltage measurement; 0 to 98 C; 1.01E-5 Pa; 10 to 125 day; AC flashover voltages; DC flashover voltages; PTFE; average surface roughness; contact angle; electric stress effects; flashover voltages measurement; polytertraflouroethylene aging; saline solution; temperature effects; water salinity effects; Aging; Flashover; Plastic insulation; Polymers; Rough surfaces; Stress; Surface roughness; Temperature; Time measurement; Voltage;
Conference_Titel :
Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Conference, 2001. Proceedings
Conference_Location :
Cincinnati, OH
Print_ISBN :
0-7803-7180-1
DOI :
10.1109/EEIC.2001.965584
