Recently several electrical systems have experienced the premature polymeric insulator failure on 115 and 138kV transmission lines. Orient Power has taken the lead in identifying the cause of these failures and recommending a course of action for them, and potentially the industry, to ensure the future reliability of these lines.

Before solve the polymeric insulator failure, we should learn song knowledge about it.
To understand the failure mechanism and determine a mitigation path, the Orient Power engineers’ team is utilizing a collection of industry-leading tools developed by Orient Power as part of member-funded research over the past decade. These tools include daytime corona inspection, three-dimensional electric field modeling, degradation and failure mode fundamental understanding, and population assessment techniques. For example, we need have some engineers about polymer pin insulator.

For ensuring the reason of Polymeric insulator failure, firstly, we should understand the properties about Polymeric insulator.

Polymer insulators (also called composite or nonceramic insulators) consist of a fiberglass rod attached to two metal end fittings covered by a rubber weathershed system. Polymer insulators were first developed in the 1960s and installed in the 1970s. Their advantages over conventional glass and ceramic insulators, were their light weight, resistance to vandalism, small profile, and in some cases, improved contamination performance. Polymer pin type insulators would appear in 1960s.

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