| Brand | ROCKWILL |
| Model NO. | Medium-Frequency Furnace Transformer for Metal Smelting 6kV-35kV |
| Rated frequency | 50/60Hz |
| Series | ZPS |
This oil-immersed medium-frequency furnace transformer integrates 12-pulse rectification technology to suppress 5th and 7th harmonics while maintaining a power factor above 0.95. The reinforced winding structure and enhanced insulation provide strong short-circuit withstand and overload capacity for metal melting cycles.
An efficient ONAF cooling system with Class H insulation limits temperature rise for reliable operation in foundries, scrap recycling, and ferrous or non-ferrous metal smelting. Designed for export markets, it supports 50/60Hz grids across multiple voltage classes.
| Rated Power | 1000 – 6000 kVA (Customizable) |
| Primary Voltage | 6 kV / 10 kV / 35 kV |
| Secondary Voltage | 0.4 – 1.2 kV (Rectifier-matched) |
| Rated Frequency | 50 / 60 Hz |
| Pulse Configuration | 12-pulse (Δ/Y dual secondary windings) |
| Connection Group | Dd0y11 |
| Impedance Voltage | 6 – 8% |
| Cooling Method | ONAF (Oil Natural Air Forced) |
| Insulation Class | Class H (180 °C) |
| Overload Capacity | 120% for 30 min / 150% for 10 min |
| Ambient Temperature (Max) | +40 °C |
| Ambient Temperature (24h Average) | ≤ +35 °C |
| Ambient Temperature (Min) | -25 °C |
| Altitude | ≤ 1000 m |
| Relative Humidity (Max at 25 °C) | 95% |
| Relative Humidity (Max at 40 °C) | 50% |
| Solar Radiation | ≤ 1000 W/m² |
| Pollution Class | Class II (moderate) |
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