Copper Busbar System

Copper Busbar System

        The Copper Busbar System, also known as the  High Current System, is the secondary-side power transmission system connecting the furnace transformer to the electrodes in EAF, LF, SAF, and other metallurgical furnaces.

        The system mainly consists of:

       •Copper busbars

       •Flexible copper shunts

       •Compensators

       •Water-cooled copper bus tubes

       •Through-wall copper pipe assemblies

       •Water-cooled cables

       •Conductive electrode arms

       •Electrode holders and contact pads

       •Graphite electrodes

        The system is designed to safely transmit extremely high currents while minimizing power loss, voltage fluctuation, and thermal deformation.

System Features

        Efficient Current Transmission

        High-conductivity copper components ensure stable power delivery with low electrical resistance and reduced energy loss.

        Water-Cooled Structure

        Critical components such as bus tubes and cables adopt water-cooled designs to improve operational stability and extend service life under high-temperature conditions.

        Flexible Compensation Design

        Flexible copper shunts and compensators absorb thermal expansion and mechanical movement, reducing stress on fixed connections and improving system reliability.

        Safe and Reliable Support Structure

        Non-magnetic stainless steel brackets and high-grade insulation materials are used to prevent electrical arcing and ensure safe operation.

Copper Busbar Design

        Different busbar configurations are available depending on furnace type and operating conditions.

        Traditional furnace designs use insulated copper bus tubes mounted on support arms, while modern furnaces increasingly adopt conductive electrode arms made of copper-clad steel or aluminum alloy structures.

        The copper busbar is typically connected to the water-cooled cables through cast copper terminals or fabricated copper contact plates.

        Several termination structures are available for the electrode connection, including:

        •Flanged contact connections

        •Flat blade connections

        •Round tube contact connections

        These configurations ensure reliable current transfer and convenient maintenance.

Aluminum Busbar vs Copper Busbar

Copper Busbar

       •Excellent conductivity

       •Lower electrical loss

       •Strong mechanical performance

       •Long service life

       •Better resistance to temperature fluctuation

       •Higher reliability under heavy-current operation

Aluminum Busbar

       •Lower material cost

       •Lighter weight

       •Lower conductivity

       •Larger cross-sectional requirement

       •Shorter service life

       •More sensitive to operating environment

         The selection should be based on furnace capacity, operating conditions, investment budget, and maintenance requirements.

Product Advantages

       •Low electrical resistance and reduced power loss

       •Stable high-current transmission

       •Excellent thermal stability under heavy-duty operation

       •Improved furnace efficiency and current distribution

       •Long service life with reduced maintenance requirements

       •Reliable operation under high-temperature furnace conditions

Manufacturing Advantages

        Compared with conventional bolted connection structures, our copper busbar system adopts higher manufacturing standards to improve conductivity and operational reliability.

        Key features include:

       •Precision-machined contact surfaces

       •Argon arc fusion welding technology

       •Silver/tin anti-oxidation surface treatment

       •Strict dimensional matching and assembly control

       •Complete stress-relief annealing treatment

        These processes effectively reduce overheating, oxidation, and contact resistance during long-term operation.