Electrical Properties Of Cable Insulation Materials

High dielectric strength to avoid electrical breakdown of the cable.

Electrical properties of cable insulation materials.

Learn about the physical properties of different insulation and jacket materials. During the historical development of cables numerous types of insulation have been employed. 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.

These factors interact in a complex fashion. 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. 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. High mechanical strength to withstand the mechanical handling of cables.

In general the insulating materials used in cables should have the following properties. Electrical insulation materials are employed over the metallic conductors of underground cables at all voltage ratings. Cables laid in the soil can deteriorate by the action of chemicals in soils. Can bus data cable.

During recent years there has been some consolidation in the types of insulation used. It is cheap durable and widely available. Effect of water and tropical tests. 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. 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. Electrical properties of polyolefins poly olefin structure and dielectric behavior. Thermoplastic compounds are materials that go soft when heated and harden when cooled.

High insulation resistance to avoid leakage current. Temperature dependent electrical properties of thermoplastic polypropylene nanocomposites for hvdc cable insulation abstract.