Porcelain insulators products with butterfly insulator pin insulator for high voltage transmission lines is mainly used for high-voltage transmission suspension insulator line use, porcelain insulators is a special insulation control, it can play an important in overhead transmission lines effect. Early years of porcelain insulators used for poles, slowly developing in the high-pressure end of the wire connecting the tower to hang a lot of disk-shaped insulator, it is to increase the creepage distance, usually made of ceramic, called ceramic insulators. Porcelain insulators in overhead transmission line plays a fundamental role in both, the support wires and prevent current back ground, these two actions must be guaranteed, porcelain insulators should not be due to environmental and electrical load conditions change due to various electrical and mechanical stress failure, or porcelain insulators would not have a significant effect, it will damage the use and operation of the entire line of life.