CHARACTERISTIC OF EPOXY INSULATORS IN AGEING TESTS
 
SUBOCZ DANUTA, SUBOCZ LECH
   
Abstract:
A series of various medium voltage overhead insulator constructions has been designet and executed. These being considered as test models and prototype insulators, have been subjected to laboratory tests and partly to field service tests under sea climate conditions. The main aim was to evaluate the applicability of the materials and design solutions used. As main criteria of casting epoxy resins applicability for outdoor conditions, the folowing have been adopted:
- resistance to electrical arc,
- resistance to tracking,
- stability of the above parameters at long lasting,
The comparison tests on the rcsistance to tracking of various epoxy compositions have been caried out basing upon high voltage methods. The test results enabled to select some compositions for long lasting investigations in which the differential method (ASTM D 2302) has been assumed as most practicable for estimation of creepage current resistance changes due to ultra-violet radiation estimation.
   
Key Words: epoxy insulators, constructions
   
 
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