The ac and dc performance of polymeric insulating materials under accelerated aging in a fog chamber

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

OSTI ID:6768951

Gorur, R S ^[1]; Cherney, E A ^[2]; Hackam, R ^[3]

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1. Dept. of Elect. Engr., Univ. of Windsor, Windsor, Ontario N9B 3P4 (CA)
2. Ontario Hydro, Toronto and Univ. of Windsor, Windsor, Ontario N9B 3P4 (CA)
3. Dept. of Elect. Eng., Univ. of Windsor, Windsor, Ontario N9B 3P4 (CA)

The paper presents the results of the dc performance of polymeric insulating materials in a fog chamber. The materials evaluated in fog produced from low (250 ..mu..S/cm) and high (1000 ..mu..S/cm) conductivity water include cylindrical rod samples of high temperature vulcanized (HTV) silicone rubber and ethylene propylene diene monomer (EPDM) rubber containing various amounts of either alumina trihydrate (ATH) or silica fillers, or both. Comparison is made of material performance obtained with ac which was reported in an earlier study. In both low and high conductivity fog, the time to failure with ac and +dc was very similar, but a reduction by a factor of about four was observed in the time to failure with -dc. For both ac and dc, silicone rubber performed better than EPDM samples in low conductivity fog, while the order of performance was reversed in high conductivity fog. A theoretical model to determine the effect of dry band discharges on material is presented. Good agreement of the predicted behavior of materials with the experimental findings is shown.

• OSTI ID: 6768951
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. 3:4; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
200300 -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
ALKENES
DATA
DC SYSTEMS
ELASTOMERS
ELECTRIC CONDUCTORS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELEMENTS
ENERGY SYSTEMS
EQUIPMENT
ETHYLENE
EXPERIMENTAL DATA
FOG
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
MATERIALS TESTING
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PERFORMANCE
POLYMERS
POWER SYSTEMS
PROPYLENE
RUBBERS
SEMIMETALS
SILICON
TESTING