Main Indicators Affecting the Performance of Insulating I-shaped Pultrusion

Main indicators that affect the performance of insulating I-shaped pultrusion: 1. Insulation resistance and resistivity The resistance is the reciprocal of the conductance, and specific resistance is the resistance per unit volume. The smaller th……

Main indicators that affect the performance of insulating I-shaped pultrusion:

1. Insulation resistance and resistivity

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

2. Relative dielectric constant and dielectric loss tangent

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

3. Breakdown voltage and electrical strength

In 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 applied voltage, that is, the breakdown voltage per unit thickness. For an insulating material, generally, the higher the breakdown voltage and electrical strength, the better.

4. Tensile strength

It is 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.

5. Tensile strength

It is 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.

6. Arc resistance

It’s 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 action of an arc generated by the high voltage between the two electrodes to form a conductive layer on the surface of the insulating material. The greater the time value, the better the arc resistance.

7. Sealing degree

Insulating I-shaped pultrusion has better Sealing isolation of oil quality and water quality.

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