Which types of insulation are included in medium-voltage insulated conductors?

Medium-voltage insulated conductors typically require insulation materials that can withstand higher electrical stress and environmental conditions. Cross-linked polyethylene (XLPE) is a widely used insulation material for these conductors due to its excellent electrical properties, thermal resistance, and durability. Ethylene propylene rubber (EPR) is another material that offers good flexibility and resistance to heat and ozone, making it suitable for medium voltage applications.

When electrical conductors operate in medium-voltage environments, the insulation must not only provide electrical insulation but also protect against moisture and mechanical damage. The combination of XLPE and EPR provides a robust solution that meets these requirements effectively. These materials are specifically engineered to handle the rigors of medium-voltage systems, ensuring safe and reliable performance.

Other materials listed, such as polyvinyl chloride, cotton, rubber, silicone, and fiberglass, do not typically meet the high-performance standards required for medium-voltage environments. While they may be suitable for low-voltage applications or specific uses, they lack the properties necessary to provide adequate insulation and protection in medium-voltage scenarios.