What are the Key Technical Indicators that Affect the Performance of the Glass Fiber Pultrusion Products?
1. Dielectric constant and dielectric loss tangent
The main purpose of the glass fiber pultrusion product is two: the mutual insulation resistance of the components of the power grid and the material of the low voltage capacitor (storage energy). The former requires a small dielectric constant, the latter requires a large dielectric constant, and both require a small dielectric loss tangent, especially in the case of high frequency and high voltage power. The electrical loss is small, and the drawing struts having a small dielectric loss tangent value are specified.
Guides the ability of the struts to resist continuous ignition when igniting or leaving the flame when it touches a spark. With the increasing use of the struts, the flammability standards are even more critical. We use a variety of methods to continuously improve and improve the flammability of the struts. The higher the resistance to combustion, the higher the safety factor.
3. Insulation resistance and resistivity
The internal resistance is the reciprocal of the conductance, which is the resistance per unit volume calculation. The smaller the conductivity of the raw materials, the greater the internal resistance, and the two are inversely related. For the struts, the resistivity is always expected to be as high as possible.
4.The degree of sealing
It is better for the sealing protection of oil and water.
5. Breakdown voltage and electrical strength
In a strong electric field, the struts are pulled to cause damage, and the loss of insulation performance becomes a conductive state, which is called breakdown. The voltage at the time of breakdown is called the breakdown field strength (dielectric strength). For the drawing struts, in general, the higher the breakdown voltage and electrical strength, the better. 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.
6. Tensile strength
It is the highest tensile stress assumed by the specimen during the tensile test. This is the most widely used and most iconic test for the mechanical properties of the drawing struts.
7. Arc resistance
The ability of the struts to withstand arcing along their surface under the specified test conditions. The greater the time value, the better the arc resistance. During the test, an alternating current high-voltage small current is used, and the arc generated by the high voltage between the two electrodes causes the time required for the conductive layer to form a conductive layer on the surface of the struts to determine the arc resistance of the struts.