The role of the rod insulator:

1. Insulators are usually classified into a breakable type and a non-breakable type.

2. According to the structure, it can be divided into column (pillar) insulator, suspension insulator, pin insulator, butterfly insulator, tension insulator, anti-fouling insulator and bushing insulator.

3. According to the application, it is divided into line insulators and power stations and electrical insulators. Among them, the puncturable insulator used for the circuit has a pin type, a butterfly shape, a disc type suspension type, and the non-breakable type has a cross arm and a rod type suspension type. The puncturable insulators for power stations and electrical appliances have pin-type struts, hollow struts and sleeves, and non-breakable type of rod-shaped struts and container porcelain sleeves.

4. Insulators used in overhead lines, commonly used are pin type, butterfly insulators, suspension insulators, porcelain crossarms, rod insulators and tension insulators.

5. Commonly used insulators are: ceramic insulators, fiberglass insulators, composite insulators, and semiconductor insulators.