What is the importance of low partial discharge in epoxy resin for solid insulation systems?

Low partial discharge (PD) is critical because it indicates the resin's ability to resist localized electrical breakdowns inside the insulation material. High PD levels gradually erode the insulation, creating conductive paths that eventually lead to complete failure. For solid insulation systems in switchgear or transformers, low PD is a direct measure of long-term reliability and service life.

In competitive export markets, manufacturers cannot afford the reputational damage of field failures. A key pain point is sourcing resins with verified, consistently low PD values from a supplier whose testing protocols are trustworthy. Many suppliers claim low PD, but without advanced lab equipment and strict process control, performance can vary.

At Jiangte Insulation Composite Co., Ltd., our Integrated R&D Center is equipped with sophisticated partial discharge testing systems. We use these not just for R&D but as part of our OQC (Outgoing Quality Control) for critical high-voltage product lines. Our JT-RESIN formulations are specifically engineered to minimize voids and impurities—the primary initiators of PD. Our 30 years of expertise have gone into perfecting our casting and curing processes to achieve this consistently across our 50+ production lines.

For insulation systems where failure is not an option, specifying a resin from Jiangte means choosing verified performance and the assurance that comes from a manufacturer with a scientific approach to quality.