SDL Water Cooled Cable for Electric Arc Furnace: Improving Efficiency and Reliability of EAF Operations

Introduction

With the development of modern steelmaking technology toward higher efficiency, lower energy consumption, and intelligent production, high-power electric arc furnaces (EAF) and ultra-high-power electric arc furnaces (UHP EAF) are increasingly used in steel plants worldwide.

For an electric arc furnace system, the short network between the furnace transformer and electrodes plays a critical role in overall performance. The electrical resistance, impedance balance, current distribution, and cooling capability of the short network directly affect power consumption, melting efficiency, electrode consumption, and equipment service life.

As a professional electric arc furnace manufacturer, Sanrui Electric Furnace develops and supplies SDL type assembled water cooled cables for EAF systems, designed to meet the requirements of high-current and continuous-duty furnace operation.

Compared with traditional bare copper stranded cables, SDL water cooled cables provide higher current carrying capacity, improved electrical stability, lower energy loss, and longer service life, making them an important component for modern high-power electric furnaces.

Structure and Advantages of SDL Water Cooled Cable

The SDL water cooled cable is developed from traditional copper stranded conductor

s but adopts an integrated flexible structure specifically designed for electric arc furnace applications.

The cable consists of multiple high-conductivity copper strands, an insulated support core, internal cooling water channels, a special rubber protective jacket, and water-cooled copper terminals.

Multiple small-section copper strands are assembled and twisted together through special manufacturing technology. This design allows the current to be evenly distributed among individual copper wires while reducing contact resistance and improving mechanical strength. The cable terminals are connected through high-pressure crimping technology, creating a highly reliable electrical connection with excellent conductivity and tensile strength.

The internal insulated core supports the copper strands and maintains a stable circular cross-section. The copper conductors are arranged around the core at optimized spiral angles, which improves current distribution, reduces inductive reactance, and helps balance the three-phase impedance of the EAF short network.

This balanced electrical structure reduces voltage fluctuations, improves arc stability, and contributes to lower power consumption during steel melting.

During electric arc furnace operation, the cable is continuously exposed to electromagnetic forces, vibration, bending, and mechanical movement caused by furnace roof rotation and furnace tilting. The SDL structure effectively prevents relative movement between copper strands and reduces wear, electrical corrosion, and mechanical fatigue.

The specially designed cooling channel between the cable core and outer jacket provides efficient heat dissipation. Cooling water enters at approximately 5–10℃ and the outlet temperature can be controlled below 40℃ under normal operating conditions. With effective water cooling and uniform current distribution, the cable can achieve a current density of approximately 4–5 A/mm², significantly higher than traditional bare copper cables.

The outer protective jacket is manufactured from high-performance rubber materials with excellent resistance to water, heat, abrasion, and aging. A protective buffer system further reduces mechanical damage during long-term operation.

The water cooled cable terminals use high-quality electrolytic copper flat connection structures, ensuring convenient installation, reliable conductivity, and effective cooling of the cable connection area.Performance Benefits Compared with Traditional EAF Cables

Traditional electric arc furnace short networks usually use multiple bare copper stranded cables connected in parallel. During operation, differences in cable impedance, contact resistance, skin effect, and electromagnetic forces may cause uneven current distribution.Some cables may become overloaded while others remain underutilized, resulting in accelerated conductor damage, increased maintenance requirements, and unstable furnace operation.

The SDL assembled water cooled cable solves these problems through integrated design. Each phase has balanced electrical characteristics, compact installation dimensions, lower cable weight, and improved mechanical stability.

Under similar operating conditions, traditional bare copper cables normally operate at a current density of around 1–1.5 A/mm², while SDL water cooled cables can reach approximately 4–5 A/mm².

The main performance improvements include:

Energy Saving Application in High Power Electric Arc Furnace

The performance of the short network system has a direct influence on electric arc furnace operating efficiency.

By adopting SDL water cooled cables, steel plants can reduce electrical losses, improve arc stability, and increase melting efficiency. The optimized impedance characteristics help reduce unnecessary energy consumption and improve furnace productivity.

In practical applications, SDL water cooled cables can help achieve:

• Lower electricity consumption

• Reduced electrode consumption

• Longer cable service life

• Fewer unexpected shutdowns

• Reduced maintenance costs

• Improved overall furnace reliability

  
  

Although the initial investment of water cooled cables is higher than traditional cables, the energy savings, reduced downtime, and longer service life provide significant economic benefits throughout the equipment lifecycle.

Applications of Sanrui SDL Water Cooled Cable

Sanrui Electric Furnace SDL water cooled cables are widely applied in:

• High-power electric arc furnaces

• Ultra-high-power electric arc furnaces

• Steel melting plants

• Metal recycling facilities

• Foundries

• Industrial furnace modernization projects

  
  

They are suitable for both new furnace installations and existing EAF upgrade projects where customers require higher productivity, lower operating costs, and improved electrical performance.

Why Choose Sanrui Electric Furnace Water Cooled Cable?

As an experienced electric arc furnace equipment manufacturer, Sanrui Electric Furnace provides reliable EAF solutions based on advanced manufacturing technology and practical furnace application experience.

Our SDL water cooled cables feature:

• High conductivity copper construction

• Optimized cooling design

• Reliable electrical connections

• Long service life

• Customized solutions according to furnace capacity and operating requirements

  
  

By improving the performance of the EAF short network system, Sanrui water cooled cables help steel producers achieve more efficient, stable, and economical furnace operations.

Conclusion

SDL type water cooled cable is a key component for modern high-power and ultra-high-power electric arc furnaces. Its advantages in current carrying capacity, electrical stability, cooling efficiency, and durability make it an ideal replacement for traditional bare copper cable systems.

For steel plants looking to upgrade furnace performance, reduce energy consumption, and improve production reliability, Sanrui Electric Furnace SDL water cooled cable provides a proven and efficient solution.