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Insulators of ceramicc material and steep wave front impulse test on high voltage insulators. Standard: IEC61211(1994)

RTV silicone anti-pollution flashover coatings have been used extensively for years – initially mainly on post insulators and bushings at substations and more recently also for porcelain or glass string insulators on transmission lines.

Difference of porcelain insulator, glass insulators and composite insulators.

Compare from total cost, design strength, weight, pollution resistance and other aspects.

Porcelain station post Composite station post Composite hollow insulator Hybrid station post