Why do 35 kV overhead lines mostly use suspension insulators and rarely use pin insulators

The current pin insulators are not stable enough in performance, easy to break down and age during use, consume a lot of metal materials, and are bulky, so they are rarely used. Suspension insulators are composed of iron caps, steel feet and porcelain parts. They have simple structure, high mechanical strength, and low aging rate. They can be connected into strings as needed to apply various voltage levels of transmission lines; the diameter of suspension insulators Very small, the air discharge distance between the porcelain plates can also be fully utilized. Therefore, suspension insulators are more and more widely used in overhead lines.

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