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Oil cooled distribution transformers manufacturers

Oil cooled distribution transformers manufacturers

Powertech Transformers & Controls Pvt Ltd hold the privilege of being the best in class Oil cooled distribution transformers manufacturers. These versatile transformers can be used for both indoor and outdoor applications. We offer transformers up to 2500 KVA range, as per Bureau of Energy Efficiency Standards (BEE Standards) in 11 KV Class, 22 KV Class, and in 33 KV Class, 15 KVA to 12.5 MVA with off circuit tap changer and on-load tap changer.

The mechanism for an oil-cooled transformer involves immersing the windings in an insulating oil within an iron tank. The heat is transmitted to the oil through conduction and the resulting heat is dissipated into the surroundings by air. The noise generated by the oil-cooled transformer is considerably less than its dry-type counterpart, thereby enabling the transformer for indoor use. The primary function of an oil-cooled distribution transformer is to provide the final voltage transformation in the electric power distribution system and step down the voltage to a level used by the customers. The transformer is designed for maximum efficiency at 60% to 70% load as it rarely operates at a full load capacity. Contact the best Oil cooled distribution transformers manufacturers, Powertech transformers & Controls Pvt Ltd, for superior quality products.

Standard Specification

capacity Upto 12.50 MVA
No. of Phases 3Phase
Frequency 50Hz.
Voltage Range 11KV / 22KV / 33KV
Tapping On Load Tap Changerto Provide +5% OR Off Circuit Tap Changerfor + 5% Taps in steps of 2.5% each, on HT side.
Insulation Class’A’
Vector Group Dyn 11
Duty Cycle Continuous
Winding Copper Wound
Terminal As per required

Standard Fittings (for Oil Cooled Transformers)

  • Rating & Diagram plate
  • Earthing terminals.
  • Lifting lugs
  • Thermometer pocket.
  • Oil Conservator with drain plug
  • Air release hole with plug.
  • Oil Level indicator.

Optional Devices (for Oil Cooled Transformers)

  • Bucholtz relay with alarm and trip contact.
  • Oil temperature indicator with alarm and trip contact.
  • Winding temperature indicator with alarm and trip contacts.
  • Magnetic oil level gauge with alarm & trip contacts.
  • Marshalling box to house O.T.I. and W.T.I.
  • RTCC (Remote Tap Changer Control) Cubicle.
  • Electronic Automatic Voltage Controller.
  • Pressure Release Valve.
  • Cable Box on H.T. & L.T. Side.