Product Introduction
Overview
• An arc furnace transformer is a special-purpose unit designed to supply very high currents at low secondary voltages for electric arc furnaces. It features elevated short-circuit impedance, reinforced mechanical structure, and robust insulation systems to withstand severe thermal and dynamic stresses, delivering stable power to melting processes in demanding metallurgical environments.
Application
• Arc furnace transformers are applied in steel plants, foundries, ferroalloy and non-ferrous smelters to feed AC or DC electric arc furnaces with tightly controlled power. They provide flexible tap ranges and impedance characteristics for different melting and refining stages, supporting efficient scrap melting, process optimization, and power-quality coordination with upstream transmission or distribution networks.
Advantages
• Key advantages include high short-circuit withstand capability, robust thermal performance under frequent overloads, and optimized impedance for arc stability. Advanced cooling arrangements, reinforced windings, and durable insulation extend service life and reduce unplanned outages. These characteristics help operators improve furnace availability, energy utilization, and process consistency while mitigating electrical disturbances on surrounding plant systems.
Feature
• Typical design features include multi-step tap changers for precise voltage regulation, provision for series reactors, high-strength core and clamping structures, and oil or water-assisted cooling circuits. Customized vector groups, harmonic-aware design, and integrated monitoring points allow the transformer to be adapted to specific furnace ratings, duty cycles, and grid conditions for repeatable, predictable performance.
Configuration Options
• Three-phase units with integrated or separate tap windings.
• Single-phase units in various configurations, including series tap windings and auto-transformer setups.
• Tap Changer Options: On Load Tap Changer (either in-tank or external) or Motorised Off Circuit Tap Changer.
• Tap Changer Options: On Load Tap Changer (either in-tank or external) or Motorised Off Circuit Tap Changer.
Connection Types: Secondary side Open Delta; Primary side configurable in Y/D (Star/Delta).
