Heavy-Duty Furnace Transformers
Sahara Transformers manufactures high-performance industrial furnace transformers tailored for rigorous metallurgical and chemical processes. Built to withstand rapid voltage fluctuations, frequent short circuits, high harmonics, and continuous peak-load melting cycles, our transformers guarantee long-term operational stability and maximum energy efficiency.
Custom secondary busbar terminations, motorized OLTC tap changers, and forced oil/water cooling options are available to align with specific steel plant, foundry, and smelting requirements.
Technical Specifications & Design Ratings
Comprehensive specifications designed for high current, heavy-duty industrial applications.
| Design Parameter | Standard Specification | Custom / High-Duty Options |
|---|---|---|
| Power Rating Range | 100 kVA to 5,000 kVA (5 MVA) | Up to 15 MVA (Offered for special project needs) |
| Primary Voltage Class | 11 kV, 22 kV, 33 kV (3-Phase, 50/60 Hz) | Custom dual HV input voltages available |
| Secondary Voltage & Current | Low-voltage step down with extreme current outputs | Multi-tap LV outputs tailored to melt profiles |
| Application Types | Induction Furnaces (IF), Electric Arc (EAF) | Submerged Arc (SAF) & Ladle Refining (LRF) |
| Cooling System | ONAN (Oil Natural Air Natural), ONAF | OFAF / OFWF (Forced Oil & Water Cooling) |
| Tap Changer Options | Off-Circuit Tap Changer (OCTC) | On-Load Tap Changer (OLTC) with Remote Control |
| Winding Conductor | Electrolytic High-Grade Copper (EGC) | Epoxy-bonded transposed conductor (CTC) |
| Core Material | High-permeability, Cold Rolled Grain Oriented (CRGO) steel | Laser-scribed low-loss CRGO steel laminations |
| Insulation Class | Class A standard oil immersed | High-temperature Class F / H insulation systems |
| Governing Standards | IEC 60076, IS 2020, BIS, NEMA, ANSI C57 | Full international utility & industrial export compliance |
Key Advantages for Demanding Furnace Operations
Engineered to deliver exceptional short-circuit endurance, thermal capacity, and harmonic suppression.
Reinforced Short-Circuit Strength
Furnace transformers experience frequent short circuits during scrap dropping and electrode switching. Our cores and windings are secured using rigid mechanical clamping structures to eliminate physical displacement under heavy axial forces.
High Current Secondary Busbars
Engineered with low-inductance, heavy-duty copper busbar arrangements that minimize stray magnetic losses, prevent localized overheating, and ensure smooth delivery of thousands of Amperes to the furnace electrodes.
Advanced Harmonic & Thermal Management
Inverter drives and arc furnaces generate severe current harmonics. We employ optimized flux density designs, electrostatic shielding, and directed cooling ducts to prevent thermal degradation of transformer insulation.
Flexible Tap Regulation & Process Control
Equipped with specialized multi-position tap changers (On-Load or Off-Circuit) to provide precise secondary voltage control, allowing operators to optimize power input during melting, refining, and holding phases.
Primary Heavy Industrial Applications
Trusted by steel mills, foundries, and metallurgical processing plants globally.
Rigorous Factory Testing & Quality Control
At Sahara Transformers, every furnace transformer undergoes stringent testing at our state-of-the-art facility prior to dispatch. We ensure strict adherence to international electrical, mechanical, and safety standards.
- ✓ Routine Tests: Winding resistance, voltage ratio, vector group, load losses & impedance.
- ✓ Dielectric & Insulation Tests: Separate source voltage withstand, induced overvoltage & partial discharge.
- ✓ Type & Special Tests: Temperature rise testing, short-circuit withstand validation, and Dissolved Gas Analysis (DGA).
Complete documentation, third-party inspection reports (NABL / Intertek / SGS), and routine test certificates are provided with every shipment for international procurement peace of mind.
Export Compliance & Global Support
Our engineering team collaborates with international EPC contractors, plant managers, and utility engineers to deliver custom voltage, enclosure (IP55/NEMA 3R), and tropicalized insulation designs suitable for harsh operating environments across Asia, Africa, the Middle East, and the Americas.
Frequently Asked Questions
Common technical questions regarding our industrial furnace transformers.
What capacity range do Sahara Furnace Transformers cover?
Sahara Transformers manufactures heavy-duty furnace transformers ranging from 100 kVA up to 15 MVA with primary voltage ratings of 11kV, 22kV, and 33kV, engineered for continuous melting cycles.
Which international standards do your furnace transformers comply with?
Our furnace transformers are fully compliant with IEC 60076, ANSI/IEEE C57.12.00, IS 2020, BIS, and NEMA international engineering standards.
How do Sahara Furnace Transformers handle severe harmonics and frequent short circuits?
Our transformers feature reinforced mechanical clamping systems, heavy-gauge electrolytic copper windings, optimized flux density, and advanced thermal insulation to withstand extreme electromagnetic forces and high harmonic distortion.
Can you design custom secondary low-voltage outputs for specialized smelting?
Yes, we offer fully customized secondary busbar arrangements and multi-tap voltage configurations tailored to exact melt profiles for induction, arc, or non-ferrous smelting applications.