The main indicators affecting the performance of Insulating Fiberglass products——insulating pipes are as follows:
1, insulation resistance and resistivity
The resistance is the reciprocal of the conductance, and the resistivity is the resistance per unit volume. The smaller the material conductivity, the greater its resistance, and the inverse relationship between the two. For insulating materials, it is always desirable that the resistivity be as high as possible.
2. Relative permittivity and dielectric loss tangent
There are two uses of insulating materials: mutual insulation of various components of the electrical network and the medium of the capacitor (storage). The former requires a relatively low relative permittivity, and the latter requires a relatively high relative permittivity, and both require a small dielectric loss tangent, especially for insulating materials applied under high frequency and high voltage, which are required for low dielectric loss. Dielectric loss tangent insulation material.
3, breakdown voltage and electrical strength
In a strong electric field, the insulation material is destroyed, and the loss of insulation performance becomes a conductive state, which is called breakdown. The breakdown voltage is called the breakdown voltage (dielectric strength). The electrical strength is the quotient of the distance between the voltage and the voltage applied to the two electrodes when a breakdown occurs under specified conditions, that is, the breakdown voltage per unit thickness. For insulating materials, the higher the breakdown voltage and the electrical strength, the better.
4, tensile strength
In the tensile test, the maximum tensile stress to which the specimen is subjected. It is the most widely used and representative test of the mechanical properties of insulating materials.
5, combustion resistance
Refers to the ability of the insulating material to resist combustion when it comes into contact with the flame or to prevent it from continuing to burn when leaving the flame. With the increasing application of insulating materials, the requirements for its anti-combustibility are more important. People use various means to improve and improve the anti-combustibility of insulating materials. The higher the flame resistance, the better its safety.
6, arc resistance
Under the specified test conditions, the insulating material withstands the arc effect along its surface. During the test, AC arc high voltage and low current were used to determine the arc resistance of the insulating material by the arc voltage generated by the high voltage between the two electrodes and the time required for forming the conductive layer on the surface of the insulating material. The greater the time value, the better its arc resistance.
7, sealing degree
It is better to seal and isolate oil and water.