Electric furnace transformer is a specialized heavy-duty power conversion equipment exclusively developed to serve all types of industrial electric furnaces, including electric arc furnace (EAF), submerged arc furnace (SAF), induction furnace and resistance furnace, which converts high-voltage grid power into low-voltage, ultra-large current to sustain metal smelting, alloy refining, carbide synthesis and industrial heat treatment production. Distinguished fundamentally from conventional distribution transformers for civil power supply, furnace transformers operate under extremely severe working conditions marked by drastic load fluctuation, frequent instantaneous short-circuit surges, severe harmonic distortion and cyclic thermal shock generated during arc striking and raw material melting. For this reason, the whole design prioritizes strong overload resistance, adjustable output voltage, robust anti-short-circuit mechanical performance and diversified cooling configuration, fully produced in accordance with global IEC60076, ANSI and corresponding national industrial specifications of importing countries.
As a professional Chinese manufacturer with years of overseas export experience, Jiangsu Tianhua develops full-series furnace transformers covering capacity range from hundreds kVA up to 180MVA, with primary incoming voltage options of 10kV,33kV,35kV,110kV and customized high grades per local grid standard. The secondary output voltage is adjustable in dozens of tap positions ranging from below 100V to over 1000V, matching different melting phases from cold charging to high-temperature refining, while output current can reach tens of thousands amperes to satisfy high-power smelting demand. Based on structural and cooling difference, our products fall into oil-immersed type and dry-type structure: oil immersed version dominates large-capacity SAF and EAF projects equipped with ONAN natural oil cooling, ONAF forced air cooling or OFWF forced water cooling; dry-type furnace transformer is mainly applied for small resistance furnace and laboratory induction heating equipment with fireproof and compact merits.
Global downstream metallurgy and chemical industry keeps steady expansion in emerging markets across Southeast Asia, Central Asia, Middle East and Africa in recent years, continuously driving procurement demand for customized furnace transformers. Many local steel mills, ferroalloy plants, calcium carbide and yellow phosphorus manufacturers upgrade outdated power equipment to cut power consumption and improve finished product yield. Tianhua accepts full non-standard customization on rated capacity, primary & secondary voltage ratio, tap quantity, cooling method and overall installation dimension according to customers’ furnace parameters and workshop layout. Every finished unit undergoes strict routine test, temperature rise test, short-circuit withstand test and partial discharge inspection before factory delivery to eliminate hidden failure risks under round-the-clock heavy-load production.
