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Title: Composite rod insulators for ac power lines; Electrical performance of various designs at a coastal testing station

The electrical performance of thirty-six composite insulators - of four commercial types for each AC system level of 34.5 kV, 230 kV and 500 kV - has been determined at the CEGB insulator testing station, Brighton, England. The weathershed materials were epoxy-resin, ethylene propylene rubber and silicone rubber; half of the 230 kV insulators had no stress rings. Surface leakage current was recorded for surge levels of 25 mA, 150 mA and 500 mA; a special technique was developed to obtain the flashover statistics of the 500 kV insulators, thereby enabling performance of the composite insulator to be quantified relative to that of a string of cap and pin porcelain insulators of anti-fog design, the deterioration of the insulators was observed by making regular visual inspections. The practical consequences of the findings and the causes of the degradation are discussed.
Authors:
;  [1]
  1. (Central Electricity Research Labs., Leatherhead (UK))
Publication Date:
OSTI Identifier:
6343186
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA); Journal Volume: 5:4
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; 36 MATERIALS SCIENCE; AC SYSTEMS; ELECTRICAL INSULATORS; COMPOSITE MATERIALS; ELECTRIC CONDUCTIVITY; MATERIALS TESTING; LIGHTNING; ENVIRONMENTAL IMPACTS; DESIGN; PLANNING; RESINS; SILICON; ELECTRIC DISCHARGES; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; ELEMENTS; ENERGY SYSTEMS; EQUIPMENT; MATERIALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHYSICAL PROPERTIES; POLYMERS; POWER SYSTEMS; SEMIMETALS; TESTING 240201* -- Power System Networks, Transmission & Distribution-- AC Systems-- (1990-); 360603 -- Materials-- Properties; 240500 -- Power Transmission & Distribution-- Environmental Aspects-- (1990-); 240100 -- Power Systems-- (1990-)