Instrument transformers are composed of various materials, with different components utilizing specific materials-primarily silicon steel sheets, copper wire, epoxy resin, and polycarbonate.
Core: Silicon steel sheets (power frequency); Permalloy (medium frequency); nanocrystalline materials or ferrite (high frequency); amorphous alloys (high-precision applications).
Coils/Windings: High-strength enameled electromagnetic wire (copper or aluminum).
Insulation Materials: Epoxy resin (cast type), transformer oil (oil-immersed type), SF6 gas, synthetic films, etc.
Housing: Flame-retardant polycarbonate, plastic, or metal.