Dry Type Cast Resin Transformers

TTDI has been producing Dry Type Cast Resin Transformers for more than 15years.

Dry Type Cast Resin Transformers

Main Features and Benefits

  • Resistant to short circuits (High Mechanical Strengths)
  • Non-Flammable
  • Resistant to Temperature Fluctuations
  • Moisture Resistant since non Hygroscopic
  • Space saving, permitting compact installation
  • Practically to Maintenance; Long and trouble free service
  • Suitable for Hot and Humid environments
  • Automatic temperature control and protection

Standard Fittings

  • Lifting Eyes
  • Tap Changer Links
  • Rating and diagram plate
  • High Voltage Bushings
  • Low Voltage Bushings
  • Thermal Sensor like PT-100 for Indicator


In Service in diverse Industries, Electricity Boards, Nuclear / Thermal / Hydel Power Plants, Railway Traction, High-Rise Buildings, Hospitals, Subways, Underground Vaults, Tunnels, Schools, Steel Factories, Chemical Plants, etc. Where safety is of prime concern.

  • Coils have smooth finish and are robust in construction.
  • Toshiba successfully conducted seismic Qualification test on Cast Resin Transformers supplied to Nuclear Power Installations in India, way back in 1994.

Technical Specification

Ratings Single Phase
25 kVA to 2667 kVA
Three Phase
25 kVA to 8000 kVA
Applicable Standards IS 11171,IEC 726,ANSI.C.12.01
Cooling AN, ANAF
Frequency 50 Hz, 60 Hz
Vector Group As specified
Primary Voltage Upto 33 kV
Secondary Voltage 220/127, 480/277 V
(Other Voltages as required)
Winding Material Copper / Aluminium
Tapping Range + 5% in steps of 2.5%
(Other tappings as required)
Impedance In line with applicable standards

Optional Fittings

  • Terminal Connectors
  • Special Termination Arrangement
  • Cable Box / Bus Duct
  • Cooling Fan
  • Rollers (Uni-Directional / Bi-Directional)
  • Protection with Temperature Scanner
  • Off Circuit Tap Changer

Technical Parameters of the products contained in this website are generic in nature. Please contact us for any Latest / Updated / Specific Information.