EN 50386 Porcelain Transformer Bushing 250A/630A

The EN 50386 Porcelain Transformer Bushing is engineered to deliver reliable electrical insulation and mechanical support for transformer configurations. Manufactured in strict accordance with EN 50386 and relevant DIN standards—specifically DIN 42530 and DIN 42539—these bushings provide consistent performance and dimensional accuracy for demanding electrical infrastructure projects.

For procurement professionals, engineers, and technical specifiers, selecting the appropriate bushing requires precise alignment with transformer capacity and operational safety margins. Our comprehensive product lineup covers a wide spectrum of electrical requirements, featuring current ratings from 250A up to 6500A, and voltage ratings tailored for standard distribution networks. The high-grade porcelain housing ensures exceptional dielectric strength, thermal stability, and long-term resistance to environmental degradation.

Understanding the technical parameters is crucial for accurate component sourcing. The data sheet below outlines essential mechanical and electrical specifications designed to lower procurement risks and ensure seamless integration:

• Rating (KV) & Rating (A): Defines the maximum operational voltage and current capacity, ensuring the bushing matches the specific electrical load requirements of the transformer.
• Tank Hole Size: Provides the exact mechanical mounting dimensions required for secure installation, helping to prevent fluid leakage and structural misalignment.
• BIL (Basic Impulse Level): Indicates the insulation's ability to withstand transient overvoltages and lightning impulses, a critical metric for long-term system stability.
• Creepage Distance: Carefully calculated surface distances designed to prevent electrical tracking and flashover, maintaining insulation integrity under various conditions.
• Stem Connect: Standardized threading (ranging from M12 to M75) guarantees compatibility with standard conductive hardware and terminal connections.

Specification

Product Visual Overview

Review the video below for a closer look at the structural integrity, surface finish, and manufacturing quality of our porcelain transformer bushings.

The EN 50386 porcelain transformer bushings are engineered to serve as critical insulating components in modern power distribution systems. Designed primarily for oil-immersed transformers, these bushings safely route electrical conductors through grounded transformer tanks while maintaining exceptional insulation integrity. They are widely utilized across various electrical infrastructure projects, including outdoor utility substations, industrial power grids, and commercial power distribution facilities.

Reliability is a primary concern in electrical engineering, and these porcelain bushings are manufactured to withstand demanding environmental conditions. The robust porcelain construction provides excellent resistance to weathering, UV exposure, and thermal cycling. This ensures long-term operational stability and minimizes maintenance requirements, making them a dependable choice for power grid operators and equipment manufacturers seeking consistent performance in their distribution networks.

Whether you are a transformer manufacturer sourcing standardized components for new equipment assembly, or an electrical contractor conducting infrastructure upgrades, these bushings offer the necessary mechanical strength and electrical reliability. Their design facilitates straightforward installation and integration, helping procurement teams and engineers reduce project risks and ensure the safe, continuous transmission of electrical power.

Safe and reliable transport is critical for ceramic components like porcelain transformer bushings. Our packaging process is specifically designed to provide comprehensive protection against mechanical shocks, vibrations, and impact risks during transit.

We utilize reinforced wooden crates for outer packaging, which provide structural integrity and prevent physical damage during loading, unloading, and long-distance shipping. Inside the crates, each transformer bushing is individually secured using professional-grade, shock-absorbent cushioning materials. This tailored approach effectively immobilizes the porcelain units, minimizing the risk of edge chipping or surface abrasions, and ensuring that the electrical components arrive at their destination in pristine condition, ready for immediate installation.