Performance indicators affecting insulated terminals:

1. Arc resistance: The ability of an insulating material to withstand arcing along its surface under specified test conditions. During the test, an alternating current high-voltage small current is used to determine the arc resistance of the insulating material by the arc generated by the high voltage between the two electrodes to make the conductive layer form a conductive layer. The greater the time value, the better the arc resistance.

2. Insulation resistance, resistivity: resistance is the reciprocal of conductance, resistivity is the resistance per unit volume. The smaller the material's conductivity, the greater its resistance, and the reciprocal relationship between the two. For insulating materials, it is always desirable to have the resistivity as high as possible.

3. Tensile strength: The maximum tensile stress that the specimen is subjected to during the tensile test. It is the most widely used and representative test for the mechanical properties of insulating materials.

4. Relative dielectric constant and dielectric loss tangent: There are two uses for insulating materials: mutual insulation of various components of the electrical network and dielectric of the capacitor (storage energy). The former requires a relatively small dielectric constant, the latter requires a relatively large dielectric constant, and both require a small dielectric loss tangent, especially for insulating materials applied at high frequencies and high voltages. Insulation material with a small dielectric loss tangent.

5. Combustibility: refers to the ability of an insulating material to resist combustion when it contacts the flame or when it leaves the flame. With the increasing application of insulating materials, the requirements for their resistance to combustion are more important, and various methods have been used to improve and improve the flame resistance of insulating materials. The higher the resistance to combustion, the better the safety.

6. Breakdown voltage and electrical strength: In the case of a strong electric field, the insulating material is destroyed, and the insulating property is lost to a conductive state, which is called breakdown. The voltage at the time of breakdown is called the breakdown voltage (dielectric strength). The electrical strength is the quotient of the voltage between the two electrodes when the breakdown occurs under the specified conditions and the voltage applied to the external application voltage, that is, the breakdown voltage per unit thickness. For an insulating material, generally, the higher the breakdown voltage and electrical strength, the better.

7. Sealing degree: It is better to seal the oil quality and water quality.