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How to repair of damaged porcelain insulators?

Porcelain insulators are very easy to damage by vandalism or accidental contact, the damage to porcelain insulators are various it can range from small chipping and loss of surface glaze to complete destruction.

porcelain insulators


What is the influence of glazed loss to porcelain insulators?

Glaze can increase the strength of porcelain insulators, so a glaze loss reduces the strength of insulator.

It can also can cause the short of leakage distance, both we all know leakage distance is very important to porcelain insulator.

As the development of insulator the Powertech Labs cooperation with B.C. Hydro Apparatus Department, they have found a new methods to repair the porcelain insulators.

First of all, evaluate if the extent of damage with site personnel and make a repair decision for porcelain insulators. The repair method is to coat any shedshave a minor damage with a high voltage insulator coating, sheds with major damage are nondestructively examined for extent of damage, porcelain insulators sheds can rebuilt to produce the original creepage distance, using one of two different ceramic materials, because this type ceramic materials have similar coefficients of heat expansion to porcelain, so it can immune to thermal cycling degradation once the repair is sealed with the high voltage insulating coating.

This type repair of porcelain insulator can extend the life of porcelain insulator and avoid the cost of replacement.


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