Insulating sheets are a type of insulating material widely used in the electrical and electronics industries, serving functions such as insulation and separation. So, let's discuss the performance indicators that insulating sheets should possess.

Insulation sheets exhibit a close relationship between their insulating properties and temperature. The higher the temperature, the poorer the insulating performance of the sheet. To ensure insulating strength, each insulating material has an appropriate higher allowable working temperature. Below this temperature, it can be used safely for a long period. Above this threshold, it will age rapidly. Insulating materials are categorized by their heat resistance into grades Y, A, E, B, F, H, and C. For instance, grade A insulation materials have a higher allowable working temperature of 105°C, with most insulation materials in distribution transformers and motors typically belonging to grade A.

Insulation Sheet Voltage Resistance: The higher the voltage applied to the ends of an insulator, the greater the electrostatic force on the internal charges within the material, making it more prone to ionization collisions and causing the insulator to break down. The lower voltage required to cause breakdown in an insulator is known as its breakdown voltage. The kilovolt (kV) value required to break down an insulator of 1 millimeter thickness is referred to as the insulating material's insulation voltage resistance, commonly known as insulation strength.

Due to the inherent insulating strength of all insulating materials, manufacturers of various electrical equipment, safety tools (such as electrician's pliers, voltage testers, insulating gloves, and sticks), and electrical materials, have established specific allowable operating voltages known as rated voltages. It is crucial that the voltage used does not exceed the rated voltage to prevent accidents.