Electric arc furnace transformer refers to the power supply for electric arc furnaces such as various metals, ore smelting, heat treatment, preparation of alloys, and electroslag return. The electric arc furnace transformer is one of the main electrical equipment of the electric arc furnace. Its function is to reduce the input high voltage of 10-110kV (or even higher) to 100-1200V and then output it to generate a large current to power the arc furnace transformer.
(1) The transformation ratio is large
(2) The secondary current is large
(3) The secondary voltage can be adjusted to meet the needs of the smelting process.
(4) The overload capacity is large, and the transformer has a short-time overload capacity of 20%
(5) Higher mechanical strength
(6) The maximum temperature of the transformer is less than 95°C during operation.
(7) It is stipulated that the primary (high voltage) coil can be connected to both a Y shape and a △ shape, and the secondary (low voltage) coil can only be connected to a △ shape.
(1) Primary rated voltage. There are mainly 6kV, 10kV, 35kV and 110kV.
(2) Secondary voltage. The range is generally between 100 and 1200V.
(3) Rated current. The rated current in the low-voltage side coil remains unchanged; while the current in the high-voltage coil changes with the secondary current.
(4) Power supply frequency. Power frequency f=50Hz/60Hz
(5) Efficiency. Generally, η=95% to 98% for small and medium-sized transformers, and η=99% for large transformers.
Structural features
Core Construction
High-grade grain-oriented silicon steel core
Automated cutting with 45° full miter joints
Punch-free processing with fiberglass-free adhesive tape binding
Coil Technology
Advanced main-longitudinal insulation structure
Optimized winding design for mechanical strength
Precision-engineered insulation system
Key Features
Superior short-circuit & overload capacity
High efficiency with minimal losses
Safe and reliable operation
Technical Specifications
Designed for electric arc furnace steelmaking
Capacity matched to furnace size and process requirements
Two voltage regulation options:
On-load tap changing (OLTC) for large units
No-load tap changing for smaller units
Impedance variation through:
Series reactor switching (for units with reactors)
HV winding reconfiguration (for reactor-free units)
Performance
Fully compliant with smelting process demands
Robust construction for industrial environments
Energy-efficient power conversion
