Suspended porcelain insulator XWP3-70

In the early years, porcelain insulators were mostly used for utility poles, but gradually developed into many disc-shaped insulators hanging at one end of high voltage power line connection towers. They are usually made of glass or ceramic to increase the creepage distance and are called insulators. Insulators play two basic roles in overhead transmission lines, namely supporting conductors and preventing current from returning to ground. These two roles must be guaranteed, and insulators should not fail due to various mechanical and electrical stresses caused by changes in environmental and electrical load conditions. Otherwise, insulators will not play a significant role and will damage the service life of the entire line.