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Machine Listing - Arc Furnace Transformers

IEC 118453
Type 50 Hertz
Equipment Class Furnace Transformer
Weight 111,200 kg
Size 80 MVA
Condition Includes Limited Warranty

  80 MVA Arc Furnace Transformer ▪▪ Rated Power 80 MVA at 55 K winding temperature rise ▪▪ Winding material copper ▪▪ Frequency 50 Hz +1% - 2% ▪▪ The transformer is used for stepping down the mains voltage to the voltage level required for operation of the plant. It is of special design to meet the specific demands of arc furnace operation. Electrical Data: Standard: IEC 76, VDE 0532 ▪▪ Installation indoors ▪▪ Altitude < 1000m (near sea level) ▪▪ Ambient temperature -15 … +40 C ▪▪ No load ratio 35 kV / 840-495V ▪▪ Range of constant power 840 V – 720 V ▪▪ Range of constant current 720 V – 495 V ▪▪ Two phase operation with rated current for max. 5 min. ▪▪ Rated lightning impulse withstand voltage: 250 kV ▪▪ Rated power frequency withstand voltage 95 kV ▪▪ Rated power frequency withstand voltage 5 kV ▪▪ Secondary winding ▪▪ Motor operated tap changer on-load ▪▪ Number of positions 17 ▪▪ Max. secondary current 64.2 kA ▪▪ Type of cooling OFWF ▪▪ cooler capacity 1 x 100 % ▪▪ Max. cooling water inlet temperature 35 °C ▪▪ Type of heat exchanger double tube oil / water cooler ▪▪ Weights: Total 111,200 kg ▪▪ Dimensions for transport: Length 5 860 mm ▪ Width 3 685 mm ▪ Height 3 900 mm ▪▪ Characteristic features of the transformer are low secondary voltages and high secondary currents. The operating voltage will be charged according to the process parameter by using motor-operated On-load tap changers. This tap changers are installed inside the transformer tank in separate compartments with it own oil circuits.