Electric Arc Furnace Transformer

Exceptional Overload Capacity:

During steelmaking, particularly in the melting phase, frequent material collapses and short circuits subject the transformer to immense mechanical and thermal stresses. Consequently, its design and construction must exhibit extremely high mechanical strength and short-circuit resistance.

Wide Voltage Regulation Range:

To accommodate varying power demands across smelting stages (piercing, melting, oxidation, reduction), these transformers typically feature on-load tap changers. These allow substantial secondary voltage adjustment under load (typically ±10% to ±20% of rated voltage, or even wider).

Extremely High Secondary Current:

To generate arcs reaching thousands of degrees Celsius, secondary currents can range from thousands to tens of thousands of amperes. Consequently, secondary leads (copper busbars or water-cooled cables) are exceptionally robust.

Capacity Matching:

Transformer capacity must align with the electric arc furnace's tonnage, smelting process (standard power, high power, ultra-high power), and anticipated production rhythm.

Impedance Selection:

Requires comprehensive consideration of the grid's short-circuit capacity and smelting process requirements. Impedance is not a fixed value and can be designed according to specific needs.

Harmonics and Reactive Power Impact:

Electric arc furnaces are "pollution sources" for the grid, generating substantial harmonics and severe reactive power fluctuations. Transformers must be used in conjunction with static var compensators (SVCs) and active filters.

Our company is a leading manufacturer of electric furnace transformers in China and the primary drafter of all national standards for such equipment. Since our establishment, we have consistently focused on electric arc furnace transformers as our core product line, spanning the entire development process from designing and manufacturing 0.5-ton arc furnace transformers in the 1960s to producing 220-ton units by 2010. Since 1990, we have supplied over 460 sets of electric furnace transformers to domestic and international customers. Among these, more than thirty units with capacities exceeding 63,000 kVA are currently in operation, including exports to countries such as Indonesia, Iran, and Russia.