Main Indicators for Measuring the Performance of Insulating Materials

The main indicators affecting the performance of insulating materials are as follows:

1. Insulation Resistance and Resistance Rate

Resistance is the reciprocal of conductance and resistivity is the resistance per unit volume. The smaller the conductivity of the material is, the greater its resistance is. The reciprocal relationship between them is always expected to be as high as possible for insulating materials.

2. Relative dielectric constant and dielectric loss tangent

Insulating materials are used for two purposes: mutual insulation of various parts of the network and medium (energy storage) of capacitors. The former requires a relatively small dielectric constant, while the latter requires a relatively large dielectric constant. Both require a small dielectric loss tangent, especially for insulating materials used at high frequencies and high pressures. In order to reduce dielectric loss, a small dielectric loss tangent is required.

3. Breakdown Voltage and Electrical Intensity