GUIDE FOR THE APPLICATION OF SILICONE RUBBER INSULATORS
Insulator contamination is a common problem on overhead lines. The essential element for interruption with contaminated insulators is moisture. Wet atmospheric condition result in water filming on insulator surfaces and leakage currents develop. Silicone offers the ultimate solution in distribution insulators. The material inherently resists water filming there by limiting leakage currents. Insulators with reduced leakage currents, even when contaminated, require less frequent washing. The saving maintenance costs is yet other benefit in using silicone rubber insulators.


1- lnner Core
The inner core of distribution Suspension/Dead-End and line post insulators are made of a high quality fiberglass that has been specially formulated for electrical and mechanical applications.

2- Housing and sheds
The housing and sheds of the insulator are one piece, injection molded silicone rubber is chemically bonded to the inner core. This ensues that the interface between the rubber and inner core is impenetrable against moisture ingress.

3- End Fittings
The end fitting on the distribution Suspension/Dead-End insulator is made of high strength, forged steel. The insulators have Specified Mechanical Load (SML) rating of 70KN (15600 lbs), also all insulators Routine Test Load (RTL) are proof tested to 35KN (7800 lbs) in tension.