What does high-voltage insulation contain?

High-voltage mica insulation sheets is a kind of insulating material, insulation material is a kind of insulator, it also includes solid and liquid. That is to say, high-voltage insulation material must be insulating material, but the insulation material and must be insulated high voltage, such as ordinary wire foreskin, but the high voltage can only be instantaneous breakdown.
High voltage insulation material is vulcanized fiber sheet. According to the national standard GB2900.5 provides the definition of insulating material is: "used to make the device in the epoxy glass laminate sheet." That is, to prevent the current through the material. Its resistivity is very high, usually in the range of 10 ^ 9 ~ 10 ^ 22Ω · m. As in the motor, the insulating material around the conductor isolates the turns and isolates it from the grounded stator core to ensure safe operation of the motor.