What are the indicators that affect the insulator

1, the insulation resistance and resistivity resistance is the reciprocal of the conductance, the resistivity is the resistance per unit volume. The smaller the conductivity of the material, the greater the resistance, the reciprocal relationship between the two, for the insulation material, always want the resistivity as high as possible.
2, the relative dielectric constant and dielectric loss tangent insulation material uses two: the electrical network components of the mutual insulation and capacitor dielectric (energy storage). The former requires a relatively small relative dielectric constant, which requires a relatively large relative dielectric constant, and both require dielectric loss tangent, especially in high frequency and high pressure applications of insulating materials, in order to make dielectric loss is small, require the use of Dielectric loss tangent small insulation material.
3, breakdown voltage and electrical strength in a strong electric field under the destruction of insulating materials, loss of insulation into a conductive state, known as the breakdown. The breakdown voltage is called the breakdown voltage (dielectric strength). EPGC201 is under the conditions of the breakdown of the voltage and withstand the voltage between the two electrodes of the business, that is, the unit thickness of the breakdown voltage. For insulating materials, the general breakdown voltage, the value of electrical strength as high as possible.
4, the tensile strength is in the tensile test, the specimen to withstand the maximum tensile stress. It is the most widely used and most representative test of the mechanical properties of insulating materials.
 5, resistance to burning refers to the insulation material in contact with the flame to resist combustion or leave the flame to prevent the ability to continue burning. With the increasing use of insulating materials, its resistance to flammability is more important, people through various means to improve and improve the flame resistance of insulating materials. The higher the flame resistance, the better the safety.
6, resistance to arc In the specified test conditions, the acetate cloth tapes to withstand the role of the arc along its ability. Test the use of high-voltage alternating current, by high pressure generated between the two electrodes of the arc, so that the surface of the insulating material to form the conductive layer of the time required to determine the arc resistance of insulating materials. The greater the time value, the better the arc resistance.
7, the degree of sealing on the oil, water quality isolation is better.