1. insulators usually divided can not breakdown type and breakdown type.

2.According to the structure can be divided into pillar (pillar) insulator, suspension insulator, pin insulator, butterfly insulators, tension insulators, stain insulator insulators and bushings.

3. Applications are divided into line insulators and power plants, electrical insulators. Wherein the breakdown insulators for lines with male, butterfly, pin type, not breakdown type have cross arms and Rod. Can breakdown insulators used in power plants, electrical appliances with male pillar, the pillar and hollow casing, not breakdown type has porcelain rod post and container.

4.The overhead lines used insulators, commonly used pin insulators, butterfly insulator, suspension insulator, porcelain cross arm, tension rod insulators and insulators.

5. The common insulators are: ceramic insulators, fiberglass insulators, synthetic insulators, semiconductors insulators.