A material that isolates the charged body from other parts of the electrical equipment. Commonly used solid materials are insulating sleeves. Insulating paper, laminates, rubber, plastic, paint, glass, ceramics, mica and so on. Commonly used liquid materials are transformer oil. Gaseous materials in the air, nitrogen, sulfur hexafluoride and other use more. Society is using more insulating materials. Use and industry and life, the more common is the "glass cloth tape", "plastic", ceramics and so on. Are all insulating materials.
Insulation material: Resistivity of 109 ~ 1022 Ω · Cm of the material composition of the material in the electrical technology known as insulating materials, also known as dielectric. Simply means that the charged body and other parts of the material isolation. insulation materials on the DC current has a very large resistance, under the action of DC voltage, in addition to a very small surface leakage current, in fact, almost non-conductive, and for the AC current capacitor current through, but also that is not Conductive. The greater the resistivity of the insulating material, the better the insulation performance. [1] Insulating material is an indispensable material in electrical products.
In general, electrical and electrical equipment are made of conductive materials, magnetic materials, insulating materials and structural materials. In addition to insulating materials, the other is metal materials. Motor, electrical appliances in operation, inevitably subject to temperature, electricity, mechanical stress and vibration, harmful gases, chemicals, moisture, dust and radiation and other factors. These factors have a more pronounced effect on insulating materials than other materials. It can be said that the insulation material is more sensitive to these factors, easy to deteriorate deterioration, resulting in damage to electrical equipment. So the insulation material is to determine the motor, electrical operation of the key material reliability. With the continuation of running time, insulation materials must be aging, and its aging faster than other materials, so the choice of motor, electrical life of the key material is insulating material.