The main function of insulators is to achieve electrical insulation and mechanical fixation, for which various electrical and mechanical performance requirements are specified. Such as under the specified operating voltage, lightning overvoltage and internal overvoltage, no breakdown or flashover along the surface; under the specified long-term and short-term mechanical load, no damage and damage; under the specified machine , After long-term operation under electric load and various environmental conditions, no obvious deterioration will occur.
The fittings of the insulators do not produce obvious corona discharge under the operating voltage, so as not to interfere with the radio or television reception. Because insulators are widely used devices, their connection fittings are also required to be interchangeable. In addition, the technical standards of insulators also require various electrical, mechanical, physical, and environmental conditions to test the performance and quality of the insulators according to different models and conditions of use.
Since 2004, the main business income of major enterprises in the insulator arrester industry in my country has continued to grow rapidly, with an average annual growth rate of nearly 25%. With the improvement of the technical level of my country's insulation product manufacturing industry, and the acceleration of economic development in East Asia, South Asia and other countries , The major domestic enterprises seized the opportunity to actively explore the international market, and the export delivery value of the industry increased year by year. According to relevant research forecasts, the compound annual growth rate of the sales revenue of my country's insulator arrester manufacturing industry from 2012 to 2015 is 17.83%. In 2015, the domestic insulator arrester industry sales revenue will reach 40.3 billion yuan.
The power industry is the most important application market for insulator surge arresters. Many power projects in my country at this stage, such as the construction and transformation of urban and rural power grids, west-to-east power transmission projects, electrified railway construction projects, and the launch of the UHV product market are not only for the insulator surge arrester industry. The development of the company provides a broad market space, and at the same time puts forward new requirements for the industry product market, and promotes the adjustment of the market structure of insulator arresters and the research and development of new technologies.
