Furnace Transformers

URJA has established itself as a leading furnace transformer manufacturer, supplier and exporter from India. Furnace transformer is a special purpose transformer.

High current furnace transformer is arranged by providing low voltage windings and organized in a closed delta configuration. In electrical induction furnaces the heat is applied by the coil by inducing current through it. The magnetic field produced by induction coil induce eddy currents leading to heating of coil. Furnace transformers are used for stepping down voltages form the level between 11 and 33 kV to a few hundred volts.

We offer induction furnace transformers and arc furnace transformers for arc furnace, submerged arc furnace and induction furnace applications. The secondary voltages of these electric arc furnace transformers suit furnace specifications with 6 and 12 pulse operations.

Furnace transformers used in steel manufacturing plants in the steel smelting section where the base metal is extracted from the ore. Furnace transformers are utilized for supplying power to electric furnace. It steps down high voltage to a lower voltage for arc furnace requirement. Furnace transformers installed for charging open arc furnaces are subjected to a number of short circuits per melt. This is due to the fact that the material which is melted collapses across the electrodes. Due to extreme nature of process the furnace transformers have large tapping ranges. Since the steel plant has a twenty four hour running cycle the furnace transformers are most of the times subjected to 800 operations of tap change on a daily basis.Continuous use demands high maintainability and increase in maintenance intervals. Here online tap changers play a vital role. Furnace transformers are equipped with online tap changers rather than the inbuilt tap changers to facilitate maintenance operations to be carried out smoothly. To further reduce the downtime furnace transformers are installed with plug in diverters. This allows a quick changeover or replacement of part in case of breakdown or scheduled maintenance in plant area.

• We manufacture furnace transformers upto 10 MVA and 33 kV Class.
• Method employed for furnace transformer cooling is ONAN, ONAF, OFAF and OFWF.

We export furnace transformers to Saudi Arabia, Oman, Kuwait, United Arab Emirates, United Kingdom, Kenya, South Africa, Tanzania, Algeria, Turkey, Germany, Belgium, Poland, Indonesia, Netherlands, Australia and Bangladesh.

Specifications:

• "Off Circuit Manually Operated" and "On Load Tap Changer" (OLTC) with AVR and RTCC panel
• OFWF cooling with ONAN cooling optional
• ONAN cooling with conventional pressed steel radiators
• Requisite series reactors for arc furnace transformers to reduce the short circuit stresses generated in transformer during the furnace operation
• Designed to withstand the harmonics generated due to furnace operation
• 'Tap Changer' options available in these furnace transformers, arc furnace transformers and electric arc furnace transformers.