The electrical performance of polymeric insulating materials under accelerated aging in a fog chamber

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · IEEE Trans. Power Del.; (United States)

DOI:https://doi.org/10.1109/61.193898· OSTI ID:6372185

Gorur, R S; Cherney, E A; Hackam, R ^[1]; Orbeck, T ^[2]

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1. Univ. of Windsor, Windsor, Ontario (CA)
2. Dow Corning Corp., Midland, MI (US)

A comparative study of the ac (60 Hz) surface aging in a fog chamber is reported on cylindrical rod samples of high temperature vulcanized (HTV) silicone rubber and ethylene propylene diene monomer (EPDM) rubber containing various amounts of alumina trihydrate (ATH) and/or silica fillers. In low conductivity (250 ..mu..S/cm) fog, silicone rubber performed better than EPDM samples whereas in high conductivity (1000 ..mu..S/cm) fog, the order of performance was reversed. The mechanisms by which fillers impart tracking and erosion resistance to materials is discussed as influenced by the experimental conditions of the accelerated aging tests. Surface studies by ESCA (Electron Spectroscopy for Chemical Analysis) demonstrate that the hydrophobicity of silicone rubber, despite the accumulation of surface contamination, can be attributed to migration of low molecular weight polymer chains and/or mobile fluids, such as silicone oil.

• OSTI ID: 6372185
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. 3:3; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
AGING
CONTAMINATION
DATA
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY SYSTEMS
EXPERIMENTAL DATA
FOG
HIGH TEMPERATURE
INFORMATION
NUMERICAL DATA
PERFORMANCE
PHYSICAL PROPERTIES
POWER SYSTEMS
SEMIMETALS
SILICON
SPECTROSCOPY
SURFACE CONTAMINATION