Influence the properties of insulating materials

Origin: 网络
Time: 2017-12-05

development of the construction industry views" (hereinafter referred to as No. 19), third of which clearly put forward to accelerate the implementation of the development of EPC in perfect engineering construction organization mode.

As a general contracting the development of electric power industry experience, advocate, recently, deputy general manager, Chinese Power Construction Group China Electricity

 1. The insulation resistance and resistivity resistance are the reciprocal of the conductance, and the resistivity is the resistance within the unit volume. The smaller the conductive material is, the greater the resistance, the reciprocal relation between the two. For the insulating material, it is always hoped that the resistivity is as high as possible. 

2. The use of the relative dielectric constant and dielectric loss angle tangent insulation material is two: the mutual insulation of the components of the electric network and the medium of the capacitor (energy storage). The former requires a relatively low dielectric constant, which requires a relatively high dielectric constant, and both requirements of dielectric loss tangent is small, especially the application of insulating materials in high frequency and high pressure, the low dielectric loss require insulating material using small dielectric loss tangent. 

3. The breakdown voltage and electrical strength are damaged under a strong electric field, and the insulation property is changed into conductive state, which is called breakdown. The breakdown voltage is called the breakdown voltage (dielectric strength). The electrical strength is the distance between the breakdown voltage and the two electrodes that withstand the applied voltage under the specified conditions, that is the breakdown voltage of the unit thickness. As far as insulating materials are concerned, the higher the value of the breakdown voltage and the electrical strength.

 4. The tensile strength is the maximum tensile stress in the tensile test. It is the most widely used and representative test for the mechanical properties test of insulation materials. 

5. Combustibility refers to the ability of insulation materials to resist burning or to stop burning when they contact flame. With the increasing application of insulating materials, the requirement of its combustion resistance is more important. People can improve and improve the combustion resistance of insulating materials by various means. The higher the combustibility, the better the safety. 

6. Under the prescribed test conditions, the insulating material tolerates the ability of the arc to withstand the arc on its surface. In the test, AC high voltage and small current are used, and the arc action generated by high voltage between the two electrodes is applied to make the time needed to form the conductive layer on the surface of the insulation material, so as to judge the arc resistance of the insulation material. The higher the time value, the better the arc resistance. 

7. The sealing degree is better for the sealing and isolation of oil and water. Yangzhou Kang Sheng insulating material Co., Ltd.

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