Epoxy Resin Systems For HV Products

High-voltage GIS switch insulating parts, high-voltage cable joint epoxy insulating parts, high-voltage GIL three-pole insulators and other key components of high-voltage electrical equipment. The structural characteristics of these parts are formed by embedding or integrating metal conductors in epoxy resin, and they mainly operate in the insulating SF6 gas environment.
They need to withstand multiple sources of stress: mechanical loads from conductor weight, equipment mechanical forces, pressure of insulating gas and electrodynamic forces, thermal stress caused by current or environmental temperature changes, and natural environmental resonance, etc. High electric field intensity, discharge arcs and strong acid decomposition of arc insulation gas can cause damage. The high-temperature curing of epoxy resin generates shrinkage stress, and the thermal expansion coefficients of epoxy resin and the materials of the embedding or embedded parts are different, resulting in internal stress in the epoxy insulating structural components. The epoxy resin material used for the insulation of high-voltage electrical equipment must have excelent multi-dimensional comprehensive performance such as mechanical, electrical, thermal and chemical properties, and it must achieve near-zero risk management.

XRUN has already established a complete system of high-voltage epoxy resins. According to the supply form, they are divided into three systems: solid epoxy resins, liquid epoxy resins, and composite epoxy with pre-added fillers. According to the application processing, it can be divided into two systems: vacuum casting process and APG process. According to the type of fillers, it is divided into alumina and silica oxide systems. According to the TG value, it is classified into three categories, namely the range of 100-130°C, 130-150°C and above 150°C.

Solid epoxy resins for HV electrical applications

Note: FG3 is a alumina filler

Liquid epoxy resin for HV electrical applications

Note: FG3 is a alumina filler