The insulation materials for dry-type transformers include winding insulation, core insulation, and support structure insulation. The selection of insulation materials is crucial, affecting the service life and performance of the dry-type transformer.
Winding Insulation Materials
Common winding insulation materials include polyimide film, linen, and oxidized fiber paper. Among these, polyimide film is currently the most commonly used winding insulation material, possessing properties such as heat resistance and moisture resistance.
Core Insulation Materials
Common core insulation materials include inorganic silicates and inorganic glass fibers. Inorganic silicates are high-performance insulation materials, characterized by high temperature resistance and low moisture absorption.
Support Structure Insulation Materials
Support structure insulation materials are mainly used to support the core and windings. Commonly used materials include diatomaceous earth and gypsum board. These materials not only provide good mechanical support but also have good electrical insulation properties.
