Electrical Properties Of Cable Insulation Materials

Pvc polyvinyl chloride is the most commonly used thermoplastic insulator for cables.

Electrical properties of cable insulation materials.

Electrical insulation materials are employed over the metallic conductors of underground cables at all voltage ratings. Temperature dependent electrical properties of thermoplastic polypropylene nanocomposites for hvdc cable insulation abstract. High insulation resistance to avoid leakage current. Electrical properties of polyolefins poly olefin structure and dielectric behavior.

High dielectric strength to avoid electrical breakdown of the cable. In general the insulating materials used in cables should have the following properties. During recent years there has been some consolidation in the types of insulation used. Polymeric materials are employed as the insulation but the nature of the polymer may vary with the voltage class.

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. 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. Cable insulation is used to provide electrical separation between conductors of a cable. Water directly lowers electrical properties such as electrical resistance and dielectric strength.

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. Cables laid in the soil can deteriorate by the action of chemicals in soils. During the historical development of cables numerous types of insulation have been employed. The suitability of insulating materials for such conditions can be decided by a long experience.

Effect of water and tropical tests. Learn about the physical properties of different insulation and jacket materials. Can bus data cable. These factors interact in a complex fashion.

High mechanical strength to withstand the mechanical handling of cables. Confined areas such as tunnels.