Main performance indicators of insulating materials

To make rational use of insulating materials, it is necessary to understand their performance characteristics. The main performance indicators of commonly used solid insulation materials are breakdown strength, heat resistance, insulation resistance, mechanical strength and so on.

Evaluation and grading of heat resistance of insulating materials

Subject Content and Scope of Application This standard specifies the heat resistance classification of electrical products insulation, and determines the principles and tasks of heat resistance evaluation and classification. This standard is applicable to the heat resistance grading of electrical products and their insulation, as well as the heat resistance grading of insulation materials, simple combinations and insulation structures applied in a specific occasion.

Properties of insulating materials

Leakage current means that after a DC voltage is applied to both ends of the insulating material, a certain current will flow through the insulator. This current consists of three main components:

The application of insulation material is introduced in detail

First of all, let's talk about the application of insulating materials. The role of insulating materials is to isolate the charged parts with different potentials in electrical equipment. Therefore, the insulating material should first have a high insulation resistance and withstand voltage strength, and can avoid leakage, breakdown and other accidents. Secondly, the heat resistance is better to avoid aging and deterioration due to long-term overheating; in addition, it should have good thermal conductivity, moisture resistance and lightning protection, high mechanical strength and convenient processing.

SMC insulation board

SMC insulation board is made of unsaturated polyester glass fiber reinforced sheet molding compound by molding products of various colors. SMC composite is the abbreviation of Sheet molding compound, that is, sheet molding compound. The main raw materials are GF (special yarn), UP (unsaturated resin), low shrinkage additives, MD (filler) and various additives.

"Insulation materials" industry focus

After more than 50 years of development, China's insulation industry has initially formed an industrial system with relatively complete products, relatively complete supporting facilities, and considerable production scale and scientific research strength. Especially in the 21st century, with the rapid growth of the national economy, power generation, substation and the rapid development of the motor industry, to promote China's domestic demand for insulation materials market. At present, some products have reached a high level, have strong competitiveness in the international market, and become the world's largest producer of insulation materials in the first decade of the 21st century.