Double-umbrella Type Glass Insulators

Double-umbrella type glass insulator is the mainstream subcategory of anti-
pollution glass insulators. With its differentiated design featuring double
umbrella skirts, it takes into account anti-pollution flashover, self-cleaning
ability, and mechanical stability, and is suitable for complex transmission
scenarios such as medium and severe pollution, damp and foggy conditions. It is
commonly used in industrial pollution areas and coastal salt spray areas.
1) Core structure and design features
The double umbrella skirt configuration adopts a combination design of large
umbrella and small umbrella. The upper large umbrella has a larger diameter and
a larger outward angle of the umbrella skirt, which can effectively shield the
lower small umbrella and reduce the adhesion of dust, salt fog, bird droppings,
etc.; the lower small umbrella is compactly arranged, significantly extending
the creepage distance and enhancing the insulation performance. The edges of
the umbrella skirts are all rounded for corner treatment, reducing corona loss
and enhancing the self-cleaning effect during rain washing.

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