With the development of my country’s market economy in the in-depth direction, users will further increase their requirements for products and performance while innovating themselves. Industry enterprises are required to continue technological innovation to meet the needs of the development of related industries, and the development of related industries will also give This industry brings opportunities.

For example, high-voltage and super-insulator surge arresters in the switch industry are an indispensable part of power transmission and transformation equipment. They are closely related to the development of the national economy, especially the development of the power industry. According to relevant information, in 2000, my country’s power construction completed a grid investment of 120.8 billion yuan, a power source investment of 51.191 billion yuan, an additional 12364km of 220kV and above transmission lines, a transformation capacity of 32.68 million kVA, and a total installed power generation capacity of 319 million kW. A total of 177.4 billion yuan has been invested in construction, and the power industry has achieved rapid development. In particular, the construction and renovation of urban and rural power grids really entered the ordering and installation phase in 2000, the market demand reached its peak, and the overall ordering situation was good. According to the statistical data of 38 electric porcelain surge arrester manufacturers in the insulator surge arrester industry in 2000, the product sales are not less than 1.7 billion yuan.

The construction of the unified national grid will have more UHV transmission lines and possibly UHV lines. Therefore, seeking to adopt safe and reliable insulators with less maintenance-(or maintenance-free) insulators is a dream of those engaged in the scientific research, design and operation of transmission lines Goals, whether from downsizing to increase efficiency or implementing state overhaul, state progress is of great significance.

Composite insulators will occupy a very important and irreplaceable position in my country's UHV power transmission, and can fully compete with porcelain insulators and show an advantageous position. With its unique advantages such as small size, light weight, high strength, heavy pollution resistance and convenient cleaning and maintenance, it has become a new generation product of high-voltage transmission lines. The weight of the UHV composite insulator is only 10% of the porcelain insulator string, or even lighter, which significantly reduces the burden on the tower, and can be made into spacers to greatly compress the line corridor. The composite insulator has excellent pollution resistance, which can minimize the length of the insulator string, reduce the size of the tower, and basically eliminate the huge workload of dirty cleaning and zero-value detection, making the line maintenance simpler and reliable.

The damage of the composite insulator is most prominent in the core rod "brittle fracture". The so-called "brittle fracture" refers to the fracture caused by the acid liquid generated by the discharge in the humid atmosphere immersed in the core rod glass fiber. Therefore, the acid corrosion resistance of the core rod should be improved. In addition, the loss and recovery of the hydrophobicity of composite insulators need further study.

Capacitive composite dry wall bushing is a new type of capacitive wall bushing. Its main insulation uses new insulating materials, and the outer insulation uses high-performance vulcanized silicone rubber. It has excellent oil resistance and explosion-proof performance, and is also in line with electricity The development trend of oil-free and miniaturization of the sector is a new generation of high-voltage products that meet the requirements of urban and rural power grid transformation.