The main technical indicators of the insulator industry are: Mechanical strength and degradation rate. In terms of mechanical strength, the highest mechanical strength of the Class 3 insulators has reached the 550kN strength class. The mechanical margin of porcelain insulator and glass insulator of 240kN strength grade and below is generally 1.2-1.4, the mechanical margin of 300kN-420kN is generally 1.2-1.3, the mechanical margin of 550kN insulator is generally 1.1-1.2, and the strength grade of each strength grade Composite insulators have a mechanical margin of 1.4-1.5 or even higher.
In terms of deterioration rate, the annual average degradation rate of porcelain insulators and glass insulators is generally 0.2% or more. At present, the annual average degradation rate of porcelain insulators and glass insulators of domestic mainstream manufacturers is about 0.01%-0.005%; The annual average degradation rate is about 0.03%, and it is decreasing year by year. With the continuous accumulation of industry operating experience and continuous improvement of manufacturing levels, the manufacturing technology of the domestic insulator industry has been at the international leading level.
With the construction of China's unified joint power grid and the application of more ultra-high voltage and ultra-high voltage transmission lines, the market demand for technical performance such as reliability, pollution resistance and dispersion of electromechanical damage values of insulator products will become higher and higher.
