ADEF1C58d01 - 2004 Annual Report Conference on Electrical...

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2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Improvement of Electrical, Mechanical and Surface Properties of Silicone Insulators M. Ehsani', H. Borsi', E. Gockenbach', G. R. Bakhshandeh', J. Morshedian' 'Iran Polymer and Petrochemical Institute, Tehran, Iran *Institute of Electric Power Systems, Division of High Voltage Engineering (Schering-Institute) University of Hanover, Hanover, Germany Material Grade *SIR Elastmil R401I60 Vistalon 1500 *EPDM Abstract: The present paper reports about the results of a study of mechanical and electrical properties of polymeric insulators. Silicone tubher (SIR), ethylene- propylene-diene monomer (EPDM) and alloys of silicon-EPDM are known polymers for use as high voltage insulators. The result of mechanical measurement shows that the tensile strength, modulus and elongation of blends enhanced with increase SIR in formulation. It can he seen from the result of dielectric behavior measurement that dissipation factor tan 6 and capacity of silicone rubber improved in the effected of EPDM in blends. The blends of silicone-EPDM show good dielectric behavior compare to silicone rubber at humidity ambient. The new alloy presents excellent dielectric properties in water and humidity ambient comparison to EPDM, silicone and their blends. Introduction Electrical insulators are very important component in the electrical power system such as sub- stations and distribution and transmission lines. In the early days, outdoor insulators were made only of ceramic and glass materials. Since the 1960s. polymeric insulators were developed and its improvements in design and manufacturing, in the recent years have made them more and more attractive to utilities [l]. Polymeric outdoor insulators also called composite or non-ceramic insulators for transmission lines were developed in the 60's in Germany [2] and by other manufactures in England, France, Italy, and the US. In Germany, units for field testing were provided in 1967. In the late 1960s and early 1970s. manufactures introduced the fust generation of commercial polymeric transmission line insulators [2]. Different polymers were used in the manufacture of composite polymeric insulators. Initially they included ethylene propylene rubber (EF'R)which were made by Ceraver of France (1975), by Ohio Brass of USA (1976), by Sedivar of USA (1977) and Lap of USA (1980); Silicone rubber (SIR) was manufactured by
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This note was uploaded on 06/08/2011 for the course ELECTRICAL 124 taught by Professor Ghjk during the Spring '11 term at Institute of Technology.

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ADEF1C58d01 - 2004 Annual Report Conference on Electrical...

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