Transformers - Dry Type

Indian Transformers & Electricals manufacture quality cast-resin dry type transformers up to 3000 KVA capacity, 33 KV class.

We manufacture Cast-Resin Dry Type Transformers upto 3000 KVA; 33KV class as per Indian & International Standards i.e. IS, IEC & ANSI etc. Our transformers are design to withstand high humidity, temperature, adverse service conditions & short circuit levels & all these make our products an ideal choice. Designing, selection of raw materials, state of the art Casting Plant, in house testing facility & highly experienced manpower make our products very reliable & cost competitive.

Some of the Advantages of Dry Type Transformers

  • Maintenance Free
    Due to encapsulation of coils with cast resin the coils dimensions are stable & no coil tightening is required to maintain the short circuit strength. Also no check of oil level and electrical insulation/oil is required.
  • Non- Hygroscopic
    In cast-resin dry-type transformers, the complete encapsulation of primary and secondary winding in epoxy resin prevents penetration of moisture into windings. The cast resin offers very good protection against adverse ambient conditions. These transformers can work without disruption of service at 100% humidity.
  • Non Inflammable and Self Extinguishing
    Due to high quality insulation material the transformer is practically non-inflammable by an electrical arc, special fire protection measures are not required.
  • Resistant against Temperature Fluctuation
    The insulation material used is glass fibre reinforced with epoxy resin of class 'F' which can withstand wide temperature variation.
  • Higher Impulse Strength
    Contrary to the conventional dry type transformers the cast coil transformers are better in respect of impulse voltage withstand strength.
  • Higher Short Circuit Strength
    Higher dynamic short circuit withstand strength as compared to oil immersed and conventional dry type transformers because of fibre glass reinforced epoxy encapsulation.
  • Free of Partial Discharges
    No partial discharges can occur during operation.
  • Instant Switching
    Due to the high grade insulation material, coils are non hygroscopes & the transformer can be switched on directly without pre-drying even after a long period of service interruption.
  • No Leakage or Pilferage of Oil
    As cast resin transformers are solidly cast, problem associated with oil filled transformers like oil leakage and pilferage of oil is completely avoided.
  • Saving in Space
    These transformers are generally smaller in dimensions and lesser in weights. The construction and installation cost for the sub-station can be reduced by adopting dry type transformers.
  • Eco-Friendly
    Since no oil is used in these transformers, there are no chances of contamination of ground water due to oil leakage.
  • Saving in Civil work cost and LT cables
    Without fire or danger of explosion, it is possible to place the transformers near to the load centre. Also, these transformers do not need construction of special fibre brick walls or oil pits, which reduces the overall civil works. Additionally, since LT cables are not required, thers is also saving in cost on account of expensive cable laying works.


  • Public Places and High rise buildings
  • Shopping Malls
  • Railway Fixed traction installation
  • Underground
  • Cranes

  • Seaports and Offshore platforms
  • Drives
  • Gas ,Turbines , Generators and Drilling system
  • Solar Application
  • Mining

Technical Specifications

  • Ranging up to 3000 KVA Capacity
  • Up to 33 KV Class
  • Three-Phase, 50 / 60 Hz
  • Single / Dual Ratio
  • Naturally Cooled (AN) or Forced Air Cooled (ANAF)
  • Sheet metal enclosure with vents for air circulation IP-23 or as per customer's requirement

  • Accessories / Fittings as desired by customer
  • Insulation Class F / H, others on request
  • Applicable Standards IS:11171, IEC:60726
  • Tap Changer: Tap Links / On Load Tap Changer (OLTC) with RTCC & AVR
  • Temperature Sensors for alarm and trip protections

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