Why Choose Our Arc Furnace Transformers
We are a leading manufacturer of arc furnace transformers for steel mills and metallurgical plants worldwide. Our transformers are designed using advanced simulation tools and proven manufacturing processes, ensuring optimal performance in the most demanding EAF environments.
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- Extreme Thermal Cycling Resistance specifically designed to withstand rapid temperature fluctuations during arc furnace melting cycles.
- High Current Surge Capability engineered to handle momentary high current surges during electrode contact and arc ignition.
- Rapid Voltage Regulation equipped with high-speed on-load tap changers supporting frequent voltage adjustments per heat cycle.
- Superior Electromagnetic Force Resistance reinforced winding structures with advanced bracing systems resisting extreme short-circuit forces.
- Optimized Cooling for EAF features forced oil-water cooling (OFWF) systems designed for continuous high-load EAF operation.
Arc Furnace Transformer Series
Our arc furnace transformer series covers the full range of EAF capacities from small specialty steel mills to large integrated steel plants. Each transformer is custom-engineered to match specific furnace parameters and operating requirements.
Small EAF Transformer
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- Capacity: 5MVA-20MVA
- Voltage: 10kV-35kV
- For small EAF
- For specialty steel
- Compact design
- Custom configuration
Medium EAF Transformer
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- Capacity: 20MVA-50MVA
- Voltage: 35kV-66kV
- For medium EAF
- For mini-mills
- High efficiency
- Custom configuration
Large EAF Transformer
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- Capacity: 50MVA-120MVA
- Voltage: 66kV-220kV
- For large EAF
- For integrated mills
- Heavy duty
- Custom configuration
Ultra-High Power EAF Transformer
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- Capacity: 80MVA-150MVA
- Voltage: 110kV-220kV
- For UHP EAF
- High power density
- Advanced cooling
- Custom configuration
Need a Custom Solution?
Contact our engineering team with your specific requirements. We will provide a tailored solution and competitive quotation.
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Frequently Asked Questions
What makes an arc furnace transformer different from a standard power transformer?
A wide secondary regulation range, low secondary voltage with very high current, high impedance to stabilise the arc, and mechanical strength to survive repeated short circuits during scrap meltdown.
How is the short circuit requirement handled?
Windings are braced and banded, leads are kept short and balanced to limit electromagnetic forces, and the design is verified against the short circuit withstand requirements of the applicable standard.
Can a series reactor be included?
Yes. A series reactor lengthens the arc and lowers electrode consumption in the initial melting period, and it can be supplied integral with the transformer or as a separate unit.
What cooling is used on arc furnace transformers?
Forced oil arrangements are standard on larger units, either OFAF or OFWF depending on whether water or air is the available cooling medium on site. Cooler redundancy is provided so the furnace keeps running during a cooler fault.
