AC Clean Fog tests on non-ceramic insulating materials and a comparison with porcelain

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/61.329532· OSTI ID:6772636

De La O, A; Gorur, R S; Chang, J ^[1]

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1. Arizona State Univ., Tempe, AZ (United States). Dept. of Electrical Engineering

AC Clean Fog tests were performed on non-ceramic materials used for outdoor high voltage insulators, namely, Room and High Temperature Vulcanizing (RTV and HTV) silicone rubber, and ethylene propylene rubber (EPR), with porcelain used as the reference. The steam input rate was varied upwards from the value standardized for porcelain insulators. Results indicate that higher steam input rates produce a significant reduction in the flashover voltage of silicone rubber family materials, although it is always higher than that obtained for EPR and porcelain. For EPR, the reduction is less and is similar to that established for porcelain. The mechanisms involved have been examined. The trend in the results is found to be consistent for different formulations and insulator geometries of the generic polymer (e.g. silicone rubber, EPR) evaluated. A new, simple method for consistently applying uniform contamination on silicone rubber (both RTV and HTV) is described, without the use of extensive physical or chemical treatments, or prior conditioning by dry band arcing.

• OSTI ID: 6772636
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States), Vol. 9:4; ISSN 0885-8977
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
ELECTRICAL INSULATORS
FLASHOVER
HVAC SYSTEMS
HVDC SYSTEMS
ELECTRIC ARCS
AC SYSTEMS
CURRENTS
DC SYSTEMS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
POWER SYSTEMS
240201* - Power System Networks
Transmission & Distribution- AC Systems- (1990-)
240202 - Power System Networks
Transmission & Distribution- DC Systems- (1990-)