Thermal Stability is an Important Indicator of Insulation Paper

The insulation board industry has developed rapidly in recent years. In particular, compared with foreign production enterprises, there are obvious cost advantages in the insulation sheet industry. With the continuous improvement of the technical level of domestic insulating material production enterprises, the share of the industry in the international market is increasing, and the competition ability of the international market is gradually improved. Worldwide, laminated insulation materials are mainly manufacturers of insulation laminates. China’s insulation materials not only have significant advantages in the world, but also promote the export and foreign trade development of insulating materials such as insulating varnishes and insulating paper.

Thermal stability is an important indicator of insulating paper. It is a major factor in producing low voltage insulation aging and determines its service life. Under normal operation, the electric field intensity only has a slight effect on the aging process
of the insulation. Insulating paper, which is used in a relatively high temperature for a long time, will become brittle due to thermal aging and gradually lose its mechanical and electrical properties. Insulation board is widely used in electrical equipment, so it needs to meet certain electrical performance. The electrical property of insulating paper refers to its polarization, conductance, dielectric loss and breakdown characteristics under the action of electric field.