Zibo electric porcelain factory: insulation of porcelain insulator

      Porcelain insulator is a kind of special insulation control, which can play an important role in overhead transmission line. Early for the wire rod insulator, slowly developed in the high type high-voltage wire is connected to one end of the tower hung a lot of insulator plate, which is to increase the creepage distance, usually made of glass or ceramic, called porcelain insulator.

     In order to prevent dust and other dirt on the surface of the insulator is attached, forming pathways across the insulator breakdown voltage is increased. Therefore, the creepage distance is the surface, creepage distance, discharge distance along the surface of the insulation is called the leakage distance of creepage distance of creepage distance = surface distance / maximum system voltage. According to varying degrees of pollution, heavy pollution area the creepage distance is 31 mm / kv.

    Zero value insulator refers to the potential distribution of insulator is close to zero or equal to zero insulator in operation.

    Zero or low value insulator effect: insulation line wire depends on the insulator string, due to manufacturing defects or the role of the outside world, the insulation performance of insulators will continue to deteriorate when the insulation resistance is reduced or zero called low or zero value insulator. We have on line detection, zero or low value insulator proportion up to about 9%. This is the line lightning trip rate, another major reason for the high. The insulator is smooth, can reduce the effect of capacitance between the wires, in order to reduce the loss of current.

    Classification of insulators:

    1 insulators are usually divided into breakdown type and non breakdown type.According to the structure can be divided into 

    2 columns (pillars) insulator, insulator, pin insulator, butterfly type insulator, strain insulator, insulator and bushing insulator.

    3 according to the application is divided into line insulators and power plants, electrical insulators. The breakdown type insulator used for the circuit is needle type, butterfly type, disc suspension type, and the breakdown type has cross arm and rod shape. The utility model can be used for a power station and an electric appliance, which can be used for a needle type insulator, a needle type support, a hollow support and a bushing.

    4 insulators used in overhead lines, such as pin type insulator, butterfly insulator, suspension insulator, porcelain cross arm, rod insulator and tension insulator, etc..

    5 now commonly used insulators are: ceramic insulator, glass fiber reinforced plastic insulator, composite insulator, semiconductor insulator.