IS 7648 : 1975 Silicone compound for application on high voltage porcelain insulators

1 Scope

1.1 This standard covers the composition, classification andrequirements of silicone compounds suitable for application on thesurface of high voltage porcelain insulators to prevent by theirhydrophobic and encapsulating action the flashover of insulatorsdue to atmospheric pollution.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 460 :1962Specification for test sieves

IS 1205 :1958Determination of softening point

IS 1448 : Part 2 :1967 Methods of test for petroleum andits products:Part 2 Acidity

IS 1448 : Part 60 :1971 Methods of test for petroleum and itsproducts:Part 60 Consistency of lubricating greases bycone penetrometer

IS 2824 :1964Method for determination of the comparativetracking index of solid insulating material

IS 3396 :1965Methods of test for volume and surfaceresistivities of electrical insulatingmaterials

IS 4486 :1967Recommended methods for the determination ofthe permittivity and dielectric dissipationfactor of electrical insulating material atpower, audio and radio frequencies includingmetre wavelengths

IS 7084 :1973Specification for bitumen based fillingcompounds for electrical purposes