Insulator at the air gap insulated and atmospheric exposure of insulator surface insulation. The withstand voltage of external insulation value is closely related with the atmospheric conditions. The air gap breakdown and surface flashover is loss of form of external insulation, the insulation performance in general, breakdown or flashover occurs, insulation performance of air can be automatically recovered, is a self restoring insulation.

       A variety of porcelain or glass material atoms in the body is composed of an ionic bond through electrostatic attraction together, so the stability of porcelain and glass is very good. This also means that the surface electric porcelain and glass of the two materials have higher energy, thermodynamic quantity higher, therefore material surface adsorption water strong. In other words, porcelain or glass surface is easier to damp humid. The porcelain or glass insulators, in order to damp dirty conditions can still make the insulator surface resistanc...

       Based on the actual operation experience of Dayawan nuclear power station outdoor high voltage equipment as the basis, in accordance with national standards for the surrounding environment pollution level was evaluated. In confirmation of four conditions, the outdoor equipment external insulation creepage distance of basic requirements should be more than 3.5cm/kV, and then re verify whether the equipment external insulation selection to meet the requirements. The distance is less than the required equipment is improved on the part of creepage flas...

       To prevent the trip because of the fault line is one of the important topics of current industrial power transmission power transmission, security. Lightning blackouts flashover and lightning wave intrusion substation caused by insulator string flashover accident of transmission line line, in the southern part of China in 60%, especially the 110kV line, plain lightning rate was 0.1~0.5 times /100km years, the mountains up to 1~4 times /100km · [1]. Installing line arrester (MOA) is to prevent lightning accident, one of the effective methods ...

       Porcelain cross arm is a conical or cylindrical porcelain insulators for overhead power line, also known as porcelain insulator crossarm. It has a fixed wire and the same as ordinary line insulator and insulation function, also can completely or partially replace the iron or wooden crossarm.     &...