Application Conditions and Requirements of Anti-pollution Flashover Coatings

Under severe weather conditions (such as fog, dew, drizzle, etc.), flashovers will occur along the wet insulator surface, resulting in power system pollution flashover accidents. Pollution flashover threatens the safe and stable operation of the power system, ranging from affecting local power supply, to the power grid in severe cases, and even cracking the entire power grid. The occurrence of pollution flashover has an impact on the power supply system and caused huge losses to the national economy.

The natural contamination on the surface of the electric porcelain of the outdoor equipment of the power system is inevitable. With the development of the national economy, the air pollution is becoming more and more serious, the pollution sources are increasing in various places, and the range of the salt density value is increasing year by year. However, the configuration of porcelain insulation is generally low, the number of lines is increasing year by year, the number of anti-pollution flashover professionals is relatively small, overvoltage operation, unstable weather, bird damage and other factors, the possibility of pollution flashover is becoming more and more likely. These put forward higher requirements for operation and maintenance. According to the requirements of the State Grid Corporation of China and relevant standards, the coating requirements of external insulation anti-pollution flashover coatings for power equipment are as follows:

(1) Before construction, the construction unit shall go through the formalities in accordance with the safety work regulations of the electric power industry and other relevant documents, and conduct construction in strict accordance with the requirements of the safety regulations.

(2) When applying the anti-pollution flashover coating, avoid wet weather conditions, such as fog, condensed water, precipitation, snowfall and sandstorm weather conditions, and the construction temperature shall not be lower than -20℃.

(3) The surface of the insulator should be cleaned and dried before construction. Dirt that affects the adhesion of the antifouling flashover paint, such as oil stains, should be removed with an appropriate cleaning agent. The use of surface active agents or other cleaning agents with a mold release effect is strictly prohibited. Strong oxidants must be banned.

(4) For oil spill equipment, oil spill defects should be dealt with, and the oil stained part should be removed before applying anti-pollution flashover paint.

(5) There are regulations on the transportation and storage of PRTV coatings, and there are clear requirements for the thickness and appearance quality of the coatings.

(6) According to the working requirements of power system equipment, it is necessary to ensure that the anti-pollution flashover performance is effective. Therefore, great attention should be paid to the basic properties of antifouling flashover coatings. Anti-pollution flashover coatings PRTV coatings must have excellent electrical properties (dielectric strength, insulating properties, leakage resistance, resistivity, etc.); physical and chemical properties (mechanical strength and flame retardancy); curing time and excellent hydrophobicity; Corrosion resistance, pollution flashover resistance, aging resistance and non-toxicity.

For the anti-pollution flashover coating PRTV, it is necessary to buy from the right manufacturer, and to choose a strong and experienced one. And we have been working on power equipment for many years, so you can choose us with confidence.