The main function of the insulator is to achieve electrical insulation and mechanical fixing, for which there are various requirements for electrical and mechanical properties. If under the specified operating voltage, lightning overvoltage and internal overvoltage, no breakdown or flashover along the surface occurs; Under the specified long-term and short-term mechanical load, no damage or damage will occur; After long-term operation under specified mechanical and electrical loads and various environmental conditions, no obvious deterioration occurs; The fittings of insulators do not produce obvious corona discharge at the operating voltage, so as not to interfere with the reception of radio or television. Because the insulator is a heavily used device, its connection hardware is also required to have interchangeability. In addition, the technical standards of insulators also require various electrical, mechanical, physical and environmental conditions to be tested according to the type and conditions of use, in order to test its performance and quality.
In wet weather, dirty insulators are prone to flashover discharge, so they must be cleaned to restore the original insulation level. The general area is cleaned once a year, and the dirty area is cleaned twice a year (once before the fog season).
1, power failure cleaning
Power failure cleaning is in the line power failure after the workers boarded the pole with a rag to wipe. If it is not clean, it can be wiped with a wet cloth or scrubbed with detergent. If it is not clean, the insulator should be replaced or replaced with a synthetic insulator.
2, no power outage cleaning
It is generally used to wipe the insulator on the line with an insulating rod equipped with a brush or tied with cotton yarn. The electrical performance and effective length of the insulation rod used, the distance between the person and the live part, should comply with the provisions of the corresponding voltage level, and the operation must be supervised by a special person.
3, live water rinse
Big water flushing and small water flushing two methods. The flushing water, the effective length of the operating rod, and the distance between the person and the live part must meet the requirements of the industry regulations.
