Furnace Duty Transformer


Furnace transformers supply power to electric furnaces of various types like Arc furnace, Induction arc, Submerged arc, Rectifier duty & Ladle furnace transformers.In order withstand repeated short – circuit conditions and high thermal stress and to be protected from operational voltages resulting from the arc process, these transformers are designed after considering demanding conditions. The furnace transformer supplying power to furnace has to handle extremely high value currents in the order of kAmps depending upon furnace ratings.


  • Off-circuit tap changer
  • On load tap changer
  • Class A, uniform/non-uniform insulated
  • Vector group Dyn 11, YNd 11, Dd0y11
  • Continuous duty, double copper wound
  • Painting as per IS/IEC standards or customer requirements
  • Both HV & LV side outdoor bushings/ cable box/bus ducts/bus bar risers
  • Standard fittings as per IS/IEC standards

Protective devices:-

  • Buchholz relay with alarm and trip contact with shut off valves
  • Oil temperature indicator with alarm and trip contact
  • Winding temperature indicator with alarm and trip contact
  • Magnetic oil level gauge with alarm contact
  • Pressure relief valve with alarm and trip contact
  • Marshalling box to house oil temperature indicator and winding temperature indicator
  • Cooler units like oil to water heat exchanger pressure gauges, flow gauges, etc
  • Neutral current transformer


  • Arc Furnace
  • Ladle Furnace
  • Submerged Arc Furnace
  • Steels & Pipes Industries