Power supply unit for ESR furnaces
Power: 300 to 3000 kW
Frequency: 2 to 10 Hz
Built-in cooling system
Designed to comply with RoHS and REACH requirements
Electroslag melting is used for cakes forming of very high quality with definite features (including electric steel).
Electrode lowered into slag is to be a load: melting process is performed due to current run from electrode to slag. Electrode is a consumable one.
ESTEL supply sources for ESM furnaces are assembled as a rule according to inverter circuit with direct communication. Circuit includes two counter-coupled rectifiers and furnace is to be a load itself. Switching alternatively rectifiers the out voltage can be get with variable frequency 2 to 10 Hz.
- two rectifiers
- cooling system
- control cabinet
- transformer (optional)
Supply sources for ESM furnaces can be manufactured with various parameters. Below are given specifications in terms of one certain inverter.
|Rated power of transformer winding, kVA||8750|
|Mains rated frequency, Hz||50|
|Mains rated voltage, kV||10 or 6|
|Number of mains phases||3|
|Inverter rated out voltage, V||150|
|Inverter rated out current, A||50000 (4×12500)|
|Gradual frequency adjustment range at inverter out, Hz||1÷5|
|Number of converter phase out||1|
|Analog rectification circuit||circular/6-pulse|
|Transformer voltage adjustment||РПН|
|Tension adjustment depth, %||40|
|Rectified voltage adjustment range, V||150÷90|
|Number of tank stages||7÷10|
|Transformer valveside winding voltage, V||123.4|
|Rated leanear current of transformer valveside winding, A||7 217|
|Short circuit through tension, %||8|
|Auxiliary supply voltage, V||220 / 380|
|Transformer cooling system||ONAF|