Newtranstech oil-immersed furnace transformers deliver ultra-stable, high-current power for rigorous metallurgical smelting and steelmaking processes. Built with corrosion-resistant steel, low-loss silicon steel cores and oxygen-free copper windings, our units fully comply with IEC and GB standards, featuring low energy loss and minimal harmonic distortion. Rated up to 150 MVA (domestic) / 100 MVA (international), these low-maintenance transformers support custom tap settings and cooling systems for 24/7 continuous operation.
Specially engineered to withstand extreme electrical, thermal and mechanical stress, our furnace transformers adapt perfectly to fluctuating industrial loads, offering superior stability and durability compared with standard transformers. We provide a full-range product lineup covering electric arc furnace (EAF), electroslag remelting (ESR), submerged arc smelting, induction and graphitizing transformers, delivering customized, long-lasting power solutions for diverse metallurgical and carbon-processing applications.
Product Features
• Engineering Excellence
The Three Phase Oil Cooled Furnace Transformer.Efficiency is at the heart of our design. Our three phase oil cooled furnace Transformer utilizes advanced cooling technology to ensure maximum uptime and energy conservation. By optimizing the cooling flow, we ensure significant emission reductions and a user-friendly operational experience that lowers your long-term overhead.
• Investment and Value
Furnace Transformer Cost vs. Performance.When evaluating furnace transformer price, it is essential to look beyond the initial capital expenditure. Newtranstech focuses on Total Cost of Ownership. While the furnace transformer cost is competitive, the true value lies in:
Reduced Energy Losses: Advanced core materials and winding techniques.
Enhanced Durability: Mechanical reinforcement against short-circuit forces.
Lower Maintenance: Superior oil-cooling systems that extend the life of the insulation.
• Ultra-Wide Flexible Voltage Regulation
Featuring an extremely broad on-load tap regulation range with stepped secondary voltage levels, this transformer perfectly matches the rapidly changing process demands of electric arc furnace melting and refining. It ensures stable, precise voltage control throughout the entire steelmaking cycle.
• Superior Energy Efficiency & Verified Loss Reduction
Advanced loss-minimizing technologies — including in-phase anti-parallel connections, electric and magnetic shielding, and continuously transposed conductors — deliver outstanding efficiency.
On the 31500/110 model, real-world test results show:
- Load loss reduced by 13%
- No-load loss reduced by 17%
- No-load current reduced by 26%
compared to conventional furnace transformers — making it a genuine energy-saving and emission-reducing furnace transformer.
• Optimized Material Utilization & Cost Effectiveness
The main transformer operates at constant magnetic flux density, maximizing core material usage and providing excellent cost performance. Combined with flexible on-load tap changer selection, this design dramatically lowers both initial purchase and long-term operating costs.
• Built for Extreme Durability
Engineered to withstand frequent short circuits, severe overvoltages, and extremely high secondary currents typical in modern electric arc furnace transformer and DC electric arc furnace transformer applications, this transformer offers rugged durability and years of trouble-free service.
Discover how our patented integrated furnace transformer can boost your steelmaking efficiency, cut energy costs, and deliver fast return on investment. Contact our team today for a customized solution tailored to your electric arc furnace requirements.
Specifications & Parameters
Example: 31500 kVA / 110 kV Electric Arc Furnace Transformer – Engineered and Fully Customizable for Your Steelmaking Furnace
| Category | Specification / Description |
| Rated Capacity | 10 MVA to 100 MVA and larger |
| High Voltage Side |
6 kV – 110 kV (110 kV typical for direct step-down) |
| Low Voltage Side | Extremely wide stepped voltage regulation, typically 100 V – 1700 V, tailored to your specific melting and refining process |
| Connection Group | Dyn11 or custom configurations, with delta-connected secondary for optimal furnace performance |
| Short-Circuit Impedance | Optimized high-impedance design (8%–15% or per your requirement) to ensure stable arc operation and effective current limitation |
| Cooling Method | Optimized high-impedance design (8%–15% or per your requirement) to ensure stable arc operation and effective current limitation |
| Frequency | 50/60 Hz |
| Tap Changer | Heavy-duty on-load tap changer (OLTC) offering an ultra-wide regulation range for dynamic process demands |
| Loss Performance | Load loss reduced by 13%, No-load loss reduced by 17%, No-load current reduced by 26% compared to conventional designs |
| Secondary Current | Capable of handling up to 100 kA+ depending on your furnace configuration |
| Overload Capability | Excellent short-term overload capacity with generous thermal and mechanical design margins |
| Every technical specification can be fully customized to match your exact furnace type — whether it’s a DC electric arc furnace transformer, copper refining furnace transformer, ladle refining furnace, submerged arc furnace, or any other special application — along with your required capacity and site conditions. | |
Packaging, Warranty & Certifications Packaging：
Heavy-duty export packaging featuring comprehensive moisture-proof, shock-absorbing, and anti-corrosion protection. Large oil-immersed units are shipped in reinforced wooden crates or specialized containers with secure bracing; insulating oil and accessories packed separately for maximum safety during transportation.
Warranty：
12–18 months from delivery or successful commissioning (extendable with maintenance contracts). Full coverage for manufacturing defects and performance under rated metallurgical operating conditions.
Certifications & Testing：
ISO 9001 quality management system, compliance with IEC, IEEE, and GB standards. Third-party testing and certification (CSA,UL, KEMA, CE) available upon request. Meets international safety, environmental, and performance requirements for furnace transformer and electric arc furnace transformer in the metallurgical industry.
