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Furnace Transformer
Furnace transformers are key power supply equipment used in electric arc furnaces (EAF), ladle furnaces (LF), submerged arc furnaces (SAF), and other metallurgical furnaces. They convert high-voltage electrical power from the grid into the low-voltage, high-current power required for furnace operation.
Unlike general-purpose power transformers, furnace transformers operate under extremely harsh conditions: cyclic overload, recurrent short-circuit surges, violent current swings and severe harmonic distortion, posing stringent challenges to structural and material performance.
CHNZBTECH furnace transformers are designed with optimized structure, strong short-circuit withstand capability, stable overload performance, and reliable long-term operation for demanding steelmaking environments.
Main Features
•Optimized concentric winding structure
•Enhanced short-circuit withstand capability
•Low no-load loss and low load loss
•Advanced insulation system with improved overvoltage resistance
•Efficient cooling structure for stable temperature control
•Stable operation under heavy load fluctuations
•Reduced eddy current loss and stray loss
•Compact structure and reliable operating performance
•Suitable for continuous metallurgical furnace operation
•Compatible with automatic control systems
Technical Advantages
Enhanced Short-Circuit Resistance
Self-adhesive continuously transposed conductors (CTC) and reinforced winding structures are adopted to improve the transformer's ability to withstand frequent short-circuit impacts during furnace operation.
Energy-Efficient Operation
The transformer is designed with reduced no-load loss, optimized impedance voltage, and low stray loss to help reduce overall power consumption during steelmaking production.
Stable Operational Reliability
Advanced insulation design and optimized internal structure improve heat dissipation performance and operational stability under demanding metallurgical working conditions.
Strong Overload Capability
The transformer is designed with reliable overload capability to meet the fluctuating load requirements of metallurgical furnace operation.
Long Service Life
High-quality silicon steel sheets, premium insulation materials, and advanced manufacturing technology ensure excellent operational reliability and extended service life.
Reduced Maintenance Workload
Optimized structural design and high-quality components help minimize routine maintenance requirements and improve long-term operational stability.
Sealed & Dust-Proof Performance
The transformer adopts a fully sealed structure to effectively resist dust, flue gas, and moisture in harsh smelting workshop environments, helping prevent oil contamination and insulation deterioration.
Flexible Customization
Customized solutions are available for rated capacity, voltage ratio, impedance, cooling mode, and installation arrangement according to different smelting processes and local power supply conditions.
Common Problems & Solutions
| Problem | Cause | Solution |
|---|---|---|
| Excessive Temperature Rise | Overload operation, insufficient cooling, poor ventilation, or blocked oil flow | Optimize cooling system (ONAF/OFWF), improve ventilation and oil circulation, monitor load and temperature in real time |
| Frequent Short-Circuit Impacts | Severe current fluctuations and unstable arc conditions in the furnace | Adopt reinforced windings with CTC conductors, enhance mechanical strength, and optimize electrode regulation system |
| High Power Consumption | High no-load/load losses, improper impedance matching, or outdated design | Use high-quality low-loss silicon steel, optimize impedance design, and apply energy-saving design |
| Insulation Aging | Long-term high-temperature operation and harmonic impacts | Use premium insulation materials, improve oil circulation design, and perform regular oil quality monitoring |
| Oil Deterioration & Contamination | Long-term high temperature, dust ingress, and moisture contamination | Adopt fully sealed transformer structure and conduct regular oil inspection and maintenance |
| Terminal Overheating | Loose connections, poor contact, or excessive contact resistance under high current | Improve connection reliability, use high-conductivity connectors, and perform regular temperature inspections |
| OLTC Frequent Failure | High switching frequency due to frequent voltage regulation and heavy current impact | Select heavy-duty OLTC, strengthen maintenance schedule, and optimize tap changing strategy |
