Our electric furnace transformer represents a breakthrough in electrical engineering. By integrating a series regulating transformer and a main transformer within a single, streamlined tank, we have eliminated the complexities of traditional setups.
A standout feature is the unique connected "8" shaped low-voltage windings. This innovation eliminates tedious inter-winding welding, significantly reducing points of failure and improving electrical conductivity. Whether you are seeking a three phase oil cooled furnace Transformer or a specialized high-voltage solution, our design ensures:
Exceptional Energy Efficiency: Minimal heat dissipation and optimized flux distribution.
Robust Short-Circuit Resistance: Built to withstand the violent load fluctuations of scrap melting.
Direct High-Voltage Step-Down:Reduces capital investment by over 30% by removing the need for intermediate substations.
Why Choose Our Furnace Transformer?
Finding the right furnace transformer is critical for maintaining uptime and reducing operational overhead. Our product is built to handle dynamic loads with a wide voltage regulation range, making it the most versatile transformer for electric furnace applications on the market today.
Key Benefits for Your Plant:
1. Cost Reduction: Achieve significant loss reductions for true energy-saving and emission-reducing operation.
2. Simplified Maintenance: The three phase oil cooled furnace Transformer design uses advanced cooling logic to extend the lifespan of internal components.
3. Process Optimization: Perfectly matches the electrical arc characteristics needed for specialty alloys and stainless steel..
Product Features
• Innovative Winding Design
Patented “8” shaped integrated low-voltage windings simplify assembly, enhance reliability, and reduce manufacturing defects.
• Wide Voltage Regulation
Extremely wide on-load voltage regulation with stepped secondary voltage levels, fully adapted to varying arc furnace steelmaking process requirements.
• Advanced Loss Reduction
Multiple loss-reduction technologies including in-phase anti-parallel connection, electric or magnetic shielding, and transposed conductors deliver higher efficiency and lower operating costs.
• Optimal Material Utilization
Main transformer operates at constant magnetic density, maximizing material utilization and delivering outstanding economic benefits.
• Power Factor Improvement
Supports capacitor bank connection to effectively improve power factor and stabilize the grid.
• Investment Optimization
Flexible choice of on-load tap changers matched to voltage class; high-voltage side (e.g., 110kV) can directly step down to low voltage, eliminating intermediate substations and saving substantial investment.
• Superior Short-Circuit Resistance
Independent regulating coil with balanced ampere-turns plus oil-cylinder press-nail structure dramatically increases short-circuit withstand capability and overall reliability.
• Cost-Effective Protection
Three-side interruption scheme enables the use of economical, long-life low-voltage breakers instead of costly high-voltage ones.
• Proven Energy Savings
Verified energy performance on the 31500/110 model shows load loss reduced by 13%, no-load loss by 17%, and no-load current by 26% versus traditional designs — making it a genuine energy-saving special transformer.
• Robust Operational Durability
Designed to endure frequent short circuits, overvoltages, and high secondary currents typical of modern electric arc furnace operations.
Our full range of electric furnace transformer solutions also covers DC arc furnace transformers, ladle/copper package refining furnace transformers, submerged arc furnace transformers (ferroalloy, calcium carbide, yellow phosphorus, titanium slag), electroslag remelting transformers, induction furnace transformers, and single-phase graphitizing furnace transformers.
Specifications & Parameters
Example: 31500 kVA / 110 kV High Impedance Electric Arc Furnace Steelmaking Transformer – fully customizable
| Category | Specification / Description |
| Rated Capacity | 10 MVA – 110 MVA+ (custom to furnace size) |
| High Voltage Side |
6 kV – 110 kV (110 kV typical for direct step-down) |
| Low Voltage Side | Wide stepped regulation, typically 100 V – 1700 V (process-specific) |
| Connection Group | Dyn11 or customized, delta secondary preferred |
| Short-Circuit Impedance | High impedance design (8%–15% or as required) for arc stability and current limiting |
| Cooling Method | ONAN / ONAF / OFWF / ODWF (robust oil-immersed cooling) |
| Frequency | 50/60 Hz |
| Tap Changer | On-load tap changer (OLTC) with broad range |
| Loss Performance | Load loss ↓13%, No-load loss ↓17%, No-load current ↓26% vs. conventional |
| Secondary Current | Up to 100 kA+ depending on design |
| Overload & Short-Circuit Withstand | Strong mechanical and thermal margins for frequent furnace operations |
| All parameters are tailored to specific electric furnace capacity, process technology, and site conditions. |
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Packaging, Warranty & Certifications Packaging：
Professional export packaging with full moisture-proof, shock-absorbing, and anti-corrosion protection. Heavy units shipped in reinforced wooden crates or containers with secure bracing; oil and accessories packed separately.
Warranty：
12–18 months from delivery or commissioning (extensions available via service contracts). Covers material and workmanship defects under normal metallurgical use.
Certifications & Testing：
ISO 9001, IEC/IEEE/GB compliance, third-party testing (UL, KEMA, CE available). Meets international safety, performance, and environmental standards for furnace power equipment.
