Product Overview

An electric furnace transformer is the heart of every melting plant. Because arc furnaces, ladle furnaces and submerged arc furnaces each impose very different demands — frequent short circuits, wide current adjustment ranges, sustained overloads — the transformer must be specifically matched to the furnace's electrical and thermal cycle. Our electric furnace transformers are engineered exactly for this duty: they maintain stable arc operation, tolerate repeated impulse currents, and deliver the deep voltage regulation range required from melting down to refining stages.

Scope of Supply

Our furnace transformer series mainly includes:

• Steel-making electric arc furnace (EAF) transformers — for scrap and direct-reduction melting shops
• Ladle refining furnace (LF) transformers — for secondary refining and temperature adjustment
• Electroslag remelting furnace (ESR) transformers — for high-quality ingot production
• Submerged arc furnace transformers — covering calcium carbide furnaces, ferroalloy furnaces, yellow phosphorus furnaces and silicon-manganese alloy furnaces
• Main-frequency (power-frequency) induction furnace transformers and other AC furnace transformers

Key Features

• Process-oriented design: designed according to national industry standards and the specific smelting process of each furnace type.
• Low loss: optimized core and winding design reduces no-load and load losses, lowering electricity cost per ton of steel.
• High smelting efficiency: wide on-load or no-load voltage regulation range keeps the arc current at the optimal operating point through melting and refining stages.
• Flexible structure: available with or without a built-in reactor; high-impedance constructions can be provided to limit short-circuit current where required.
• Mechanical strength: windings are firmly clamped to withstand the electromagnetic forces caused by frequent working short circuits inherent to furnace operation.

Technical Parameters (Typical Range)

Voltage class	0.38 – 35 kV
Rated capacity	50 – 31,500 kVA
Applicable furnaces	Electric arc furnace, ladle refining furnace, electroslag remelting furnace, submerged arc furnace (calcium carbide / ferroalloy / yellow phosphorus / silicon-manganese), power-frequency induction furnace
Voltage regulation	No-load or on-load tap changing, per process requirement
Structure	With reactor, without reactor, or high-impedance type
Cooling	ONAN / ONAF per capacity and site conditions
Standards	National industry standards for furnace transformers; ISO 9001:2015 quality system

Note: parameters above show the standard supply range. Custom voltage, capacity and impedance designs are available — please contact us with your furnace data.

Selection & Ordering Information

To recommend and quote the most suitable furnace transformer, we normally need the following information: furnace type and rated capacity, secondary voltage and current requirements, regulation steps and method (no-load/on-load), incoming network voltage, impedance requirement, and site cooling conditions. Our engineering team will propose an optimized design based on these inputs.