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Outdoor porcelain and polymer insulating material

Outdoor Porcelain and polymer insulating material is the main of outdoor insulating material used in electrical insulators which used on the transmission and distribution systems.

Introduction:
Porcelain as an insulating material has over one century of service history, while polymer materials have three decades. Early generation polymer products did not provide the expected service life, and users still have concerns about polymer insulating material performance.
The chemical stability of porcelain resists aging, however it also allows the surface to easily wet, which can lead to flashover in contaminated locations. Polymer outdoor insulation is organic in nature and it can age with exposure. In a worst case condition, it can result in possible surface damage leading to surface cracking and loss of mechanical integrity. It does, however, initially resist wetting. Adequate compound formulation, combined with appropriate insulator housing design, resist weathering and aging with the benefit of enhanced flashover performance.
In this paper, consideration is given to the relative advantages of each material type. Flashover mechanisms and mitigation techniques are also discussed.

Porcelain Insulation
The vast majority of the installed electrical power system insulation directly exposed to the environment is porcelain, with over 100 years of history. This material has proven itself to resist environmental aging, be self-supporting, and is used in a wide variety of applications. It is also inherently large, bulky and heavy, broken in handling, transit and by vandalism, and subject to flashover in contaminated environments. Despite the many advantages of porcelain, system reliability can still suffer.
High strength aluminum porcelain material is popular used in electrical insulators provide high mechanical strength and electrical properties.

Polymer Insulation
Initial Products Early polymer products did not provide the expected service life, primarily because of inadequate UV and tracking resistance. As a consequence of initial product failures, many users continue to be concerned about the long term performance of polymer materials.
HTV silicone rubber material is our main insulation material used in electrical insulators used on any voltage and contamination levels areas.

Except outdoor porcelain and polymer insulating material, there are other insulator material, such as paper, wood and plastic and so on.

 

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