Testing Sheath-to-Rod Bonding to Assure Long-Term Performance of Polymer Insulators

One of the most important design aspects for polymeric insulators is the longitudinal interface between the core rod and the housing. Failures at this interface have been one of most critical aspects leading to end-of-life situations. Questions have been raised whether present standards and procedures used to test interface design are sufficiently sensitive and whether any design test result can ever be transferred to routine test behavior. Read More >

Application Strategies for Offline Measurement of PD in Power Cables (Video)

The diagnostic purpose of PD testing is to identify presence of latent, localized electrical discharges in a cable circuit that can occur either within the insulation material, at the interface between a metallic and dielectric surface or at the interface between two dielectric surfaces. Such discharges are caused by decomposition of air in voids leading to degradation of the dielectric material and finally causing failure. Read More >

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