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GPNN40.5-300 40.5kV Insulator

The 40.5kV Insulator is designed for high-reliability insulation and mechanical support in 40.5kV-class medium-voltage switchgear and power distribution equipment. It is widely used to support and isolate live conductors, busbars, terminals, or switching devices, maintaining required clearances and insulation performance under long-term electrical and environmental stress.

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The 40.5kV Insulator is designed for high-reliability insulation and mechanical support in 40.5kV-class medium-voltage switchgear and power distribution equipment. It is widely used to support and isolate live conductors, busbars, terminals, or switching devices, maintaining required clearances and insulation performance under long-term electrical and environmental stress.

Depending on application, the insulator can be supplied as post insulator / bushing-type insulator / support insulator, with material options such as silicone rubber composite or epoxy resin (as per design). It is suitable for indoor panels, outdoor installations, and harsh environments where stable dielectric performance and mechanical strength are required.
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40.5kV-Class Insulation Reliability
Designed to maintain stable dielectric performance for MV equipment and prevent flashover risks under rated conditions.

High Mechanical Strength for Support Functions
Provides stable support for conductors/busbars and resists bending and vibration during operation and short-circuit events (as per design).

Optimized Creepage Distance (By Pollution Class)
Creepage and shed profile can be selected based on pollution level requirements for indoor/outdoor service.

Weathering and Aging Resistance (Material-Dependent)
Composite silicone rubber provides strong UV/aging performance; epoxy resin provides rigid dimensional stability for indoor designs.

Stable Dimensional Consistency
Controlled molding process supports repeatable installation and interchangeability for OEM and maintenance replacement.

Customization by Drawing
Dimensions, mounting interfaces, inserts, markings, and color can be supplied according to drawings.

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Rated voltage: 40.5kV

Material: Epoxy resin

Manufacturing process: APG (Automatic Pressure Gelation)

Applicable standard: IEC

Certificate: CE

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Application.png
40.5kV metal-clad / metal-enclosed switchgear

Busbar and conductor support insulation

VCB / disconnector compartments (support & insulation interface)

Outdoor distribution equipment requiring MV insulation parts

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