Long Rod Insulator

Composite long rod insulators are used on overhead distribution or transmission lines. They are called composite suspension insulators or polymer suspension insulators or silicone rubber suspension insulators too, and provide suspention or tension usage. Tension insulators normally require higher mechnical strength than suspension insulators.

Composite long rod insulators can replace porcelain suspension insulators, just keep they have equal section length and strength. Composite insulators can have smaller creepage distance than replaced porcelain ones, since silicone rubber material can give better anti-pollution performance.

Since the composite insulators are composed by at least two types of materials, there will be interfaces. The quality of the interface between silicone rubber and the end fitting or the fiber glass core rod is critical.

Important parameter: (if you want to enquire, the following must be provided)

If composite suspension insulators are used above 220kv or high polution areas, assembled with one or two grading rings are suggested.