Electrical Properties Of Cable Insulation Materials

Polymeric materials are employed as the insulation but the nature of the polymer may vary with the voltage class.

Electrical properties of cable insulation materials.

Cable insulation is used to provide electrical separation between conductors of a cable. High dielectric strength to avoid electrical breakdown of the cable. However the chlorine in pvc a halogen causes the production of thick toxic black smoke when burnt and can be a health hazard in areas where low smoke and toxicity are required e g. Thermoplastic compounds are materials that go soft when heated and harden when cooled.

In general the insulating materials used in cables should have the following properties. Since paper insulation was used first in the power industry and was later replaced in low and medium voltage applications any comparison of properties usually employs the paper fluid system as the standard. Electrical insulation materials are employed over the metallic conductors of underground cables at all voltage ratings. Learn about the physical properties of different insulation and jacket materials.

Pvc polyvinyl chloride is the most commonly used thermoplastic insulator for cables. The suitability of insulating materials for such conditions can be decided by a long experience. Confined areas such as tunnels. High insulation resistance to avoid leakage current.

Can bus data cable. Electrical properties of polyolefins poly olefin structure and dielectric behavior. Effect of water and tropical tests. The electrical behavior of insulating materials is influenced by temperature time moisture and other contaminants geometric relationships mechanical stress and electrodes and frequency and magnitude of applied voltage.

Water directly lowers electrical properties such as electrical resistance and dielectric strength. Polypropylene has been regarded as a potential recyclable insulation material for hvdc cable which is beneficial to improve the working temperature and transmission capacity of hvdc cables. These factors interact in a complex fashion. High mechanical strength to withstand the mechanical handling of cables.

It is cheap durable and widely available. Temperature dependent electrical properties of thermoplastic polypropylene nanocomposites for hvdc cable insulation abstract.