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