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40.5kV 315‑630A Silicone‑Rubber Resin Composite Transformer Bushing

40.5kV 315‑630A Silicone‑Rubber Resin Composite Transformer Bushing adopts composite structure with epoxy resin inner insulation and silicone rubber outer sheath. It is designed for oil‑immersed transformers to realize conductor penetration, electrical insulation and sealing protection on transformer tank wall. Rated current ranges from 315A to 630A. Compliant with IEC and GB/T4109 standards, suitable for outdoor and heavy‑pollution conditions. As an alternative to traditional porcelain bushing, it features light weight and excellent anti‑pollution flashover performance.

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Product description

Detailed Introduction

This 40.5kV 315‑630A Silicone‑Rubber Resin Composite Transformer Bushing uses glass‑fiber reinforced epoxy resin as main inner insulation, fully covered with silicone rubber shed sheath externally. Flange and conductive conductor are precisely crimped to guarantee mechanical strength and conductive performance. Different from pure porcelain bushing, this Silicone‑Rubber Resin Composite Transformer Bushing has outstanding hydrophobic silicone outer insulation, greatly reducing pollution flashover risk in coastal and heavy‑dust areas. This Silicone‑Rubber Resin Composite Transformer Bushing matches medium‑high‑voltage oil‑immersed transformers. Every unit passes full‑range tests including air‑tightness, partial discharge and power frequency withstand voltage before delivery. Custom dimensions are available for project requirements, widely used in power distribution projects and new‑energy step‑up transformers.

Core Advantage

Anti‑pollution Flashover: Silicone rubber sheds own strong hydrophobic property, better anti‑flashover performance than porcelain bushing under heavy‑pollution outdoor conditions.
Light Weight & High Impact Resistance: Composite resin‑silicone structure, shock‑resistant, no easy breakage during transportation and installation.
Stable Electrical Performance: Low dielectric loss and low partial discharge, reliable insulation for long‑term operation.
Excellent Sealing Performance: Precise sealing structure at flange, prevent transformer oil leakage and moisture intrusion.
Maintenance‑free: No regular anti‑pollution coating required, cut down operation & maintenance cost.
Standard Compatibility: Conform to IEC 60137, GB/T4109‑2022, fit for global transformer projects.

             

Technical Parameter

Rated maximum voltage: 40.5kV
Rated current: 315A ~ 630A
Application: Oil‑immersed transformer, indoor & outdoor service
Standards: IEC 60137, GB/T4109‑2022
Lightning impulse withstand voltage: 200kV (peak value)
Dry power‑frequency withstand voltage: 95kV, 1min
Partial discharge: ≤10pC
Dielectric dissipation factor tanδ: ≤0.4%
Ambient operating temperature: ‑40℃ ~ +45℃
Insulation structure: Epoxy resin inner insulation + silicone rubber outer sheath
Mounting type: Flange mounting for transformer tank

Product Specification & Supporting Service

Our company provides full-series silicone rubber composite bushings in various specifications, suitable for different voltage, current and creepage distance requirements, and compatible with all types of oil-immersed transformers. We offer complete technical documents for all models, including overall dimensions, tank cover opening sizes, flange specifications, thread parameters and product weight. We provide professional full-process technical support for overseas customers, including product selection guidance, drawing verification and installation scheme optimization. Custom sizes and structures are available for special working conditions. We respond to technical inquiries promptly, avoid installation matching risks in advance, ensure stable equipment assembly, and support the efficient implementation of power distribution and new energy transformer projects.

 

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40.5kV Outdoor High-Voltage Silicone Rubber Transformer Bushing (315~630A)

(2.5kV 5500A) Low‑Voltage Porous Resin Dry‑Type Bushing for Transformer

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40.5kV Outdoor High-Voltage Silicone Rubber Transformer Bushing (315~630A)

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(2.5kV 5500A) Low‑Voltage Porous Resin Dry‑Type Bushing for Transformer

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