The performance of insulation materials is affected

1. Insulation resistance and resistivity Resistance is the reciprocal of conductance, and resistivity is the resistance per unit volume. The smaller the material conducts electricity, the greater its resistance, the reciprocal relationship between the two, for insulating materials, always want the resistivity as high as possible.

2, the relative dielectric constant and dielectric loss Angle tangent insulating material uses have two: electrical network components of mutual insulation and capacitor medium (energy storage). The former requires the relative dielectric constant is small, the latter requires the relative dielectric constant is large, and both require the dielectric loss Angle tangent is small, especially in the application of high frequency and high pressure insulating materials, in order to make the dielectric loss is small, are required to use dielectric loss Angle tangent of small insulating materials.

3, breakdown voltage and electrical strength in a certain strong electric field insulation material damage, loss of insulation properties into conductive state, known as breakdown. The voltage at breakdown is called the breakdown voltage (dielectric strength). The electrical strength is the quotient of the distance between the voltage at the time of breakdown and the two electrodes that bear the applied voltage under specified conditions, that is, the breakdown voltage borne per unit thickness. For insulating materials, the higher the breakdown voltage and electrical strength, the better.

4, tensile strength is in the tensile test, the sample under the maximum tensile stress. It is the most widely used and representative test for the mechanical properties of insulating materials.

5. Combustion resistance refers to the ability of insulating materials to resist burning when in contact with the flame or to prevent continued burning when leaving the flame. As the application of insulating materials expands day by day, the requirement of its combustion resistance is more important. People improve and improve the combustion resistance of insulating materials by various means. The higher the resistance to combustion, the better its safety.

6, arc resistance under the specified test conditions, the ability of insulating materials to withstand the arc action along its surface. In the test, AC high voltage and small current are used to judge the arc resistance of insulating materials by the time required for the formation of conductive layer on the surface of insulating materials through the effect of arc generated by high voltage between two electrodes. The larger the time value, the better the arc resistance.

7, sealing degree of oil, water seal isolation is better.