Application of insulating materials.

The role of insulating materials is to insulate the electrically charged parts of an electrical device from different electrical potentials.Therefore, insulation materials should firstly have high insulation resistance and compressive strength, and can avoid accidents such as leakage and breakdown.Secondly, the heat resistance is better than that of aging.In addition, there should be good thermal conductivity, moisture-resistant and lightning resistance and high mechanical strength, and convenient processing.According to the above requirements, the performance indexes of commonly used insulating materials include insulation strength, tensile strength, specific gravity, expansion coefficient, etc.

Insulation resistance strength: the higher the voltage on both ends of the insulator, the greater the electric field force will be in the material, the more likely it will be to collide with each other, causing the insulator breakdown.The minimum voltage that causes the insulator breakdown is called the breakdown voltage of the insulator.When a 1mm thick insulating material is punctured, the number of voltages that need to be added is called the insulation strength of the insulating material, or the insulation strength.Due to the dielectric strength of insulation material has certain, all kinds of electrical equipment, all kinds of safe appliance (electrician tongs, test pen, insulating gloves, insulated rod, etc.), all kinds of electrical materials, manufacturers stipulate certain allows the use of voltage, referred to as the nominal voltage.The voltage to be used shall not exceed its rated voltage, so as to avoid accidents.