1. What is insulating material?
The insulating material is not absolutely non-conductive. Under the action of a certain applied voltage intensity, when it exceeds its withstand voltage specification, physical conditions such as conduction, loss, breakdown, and arc will still occur, and aging will cause damage to the insulating material. Pressure reduction, surface peeling and other physical phenomena.

▶Materials can be roughly divided into conductors and insulators, and insulators are also called dielectrics. Under the specifications of its own withstand voltage, it is shielded and non-conductive, and the material whose resistivity is generally greater than 1010Ω·m is called insulating material.

▶The characteristics of insulating materials are insulation resistance, withstand voltage, moisture resistance, high temperature resistance, etc. The resistivity of the insulating material is very high, usually in the range of 1010-1022Ω·m. In high-frequency transformers, insulating materials are often used to isolate the coil from the coil or external electrical appliances to ensure the safe operation of the transformer.