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Silicone insulator

Silicone insulator is widely used on power overhead lines in recently years and the market for composite insulators is growing steadily.

Silicone insulator              Silicone insulator

Insulators’ function in power system:
Most electric power transmission is done via overhead lines, with insulators providing mechanical support and electrical protection. The two predominant designs are suspension- and post-type, both characterized by angled ‘sheds’ that direct water off the device and maximize the leakage distance between line and tower. (Leakage distance is the shortest path along the surface of the insulator from conductor to ground.)

Silicone insulator advantages compared with porcelain or glass insulators:
In the past decade, there has been a dramatic increase in the use of composites for a variety of applications, ranging from 500kV transmission line insulators and lightning arresters to cable accessories. Composite designs generally employ a fiberglass rod or hollow core for mechanical strength, with an outer housing made from either silicone rubber, EPDM or EPR. Among their advantages, composite designs offer lighter weight, less breakage, improved seismic performance and more flexibility in design than ceramic insulators. These features can translate into lower installation cost, greater durability and more aesthetically pleasing line design.

There are only some countries manufacturing composite silicone insulator in the world, and among them, China composite silicone insulator manufacturers have more experience in this field.


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