Products Cast Resin Transformers

Cast Resin Transformers

‘Eco friendly, low maintenance, low installation cost compact design and zero oil usage cast resin transformers’

Cast resin transformers have several advantages over oil cooled high-power transformers. ATL offer cast resin transformers for a wide range of magnetic applications within the HV sector.

Cast resin transformers are constructed aligned to industry regulations and standards and we present a wide offering to customer specific requirements. Advantages include low maintenance with long asset life, mitigation of oil services and a high level of miniaturisation when compared to oil filled transformers. Available both as open type and enclosed solutions these are an increasingly popular range of magnetic’s. 

Voltages up to 20kV and power levels up to 25MVA   


Cast Resin Transformer Range


  • High Voltage cast resign transformers
  • Amorphous core cast resign transformers
  • Cast resin phase shift transformers

  • Cast resin step up transformers

  • Low Fire Hazard
  • Eco-Friendly
  • Air Cooled – No oil usage required
  • Low Cost Installation
  • Low Maintenance
  • Low Noise Levels
  • Sustainable
  • Reliable
  • Fusing
  • DMT protection
  • MCB & MCCB protection
  • IMD (Insulation monitoring Devices)
  • Isolation
  • Lockable doors and panels
  • Tap changers
  • CT’s
  • Thermal monitoring and protection 


  • Paint color/Finish
  • Copper or Aluminium windings
  • Mild steel, Stainless steel, Aluminium or composite housings.
  • Distribution housings
  • Power connectors
  • Stud, Din rail, Busbar, Lug connections
  • Bespoke geometry to fit chalenging space envelopes
  • AC to DC conversion
  • Harmonic mitigation
  • K factor system compatibility
  • Configurable Inrush, Impedance, Regulation, Inductance, Leakage current,Temperature rise, Vector group & Class Designation.

In addition to open frame models we offer transformer and inductor solutions within our own unique and robust Industrial enclosures. We can service any IP rating requirements from standard indoor IP2X rating, IP5X Outdoor weatherproof applications and submersible solutions. Our swan neck type transformer housing introduced by ATL and now widely duplicated across industry provides a degree of cooling in these naturally cooled dry type transformers while maintaining superior levels of ingress protection.


Manufactured to your Specification


ATL can design to suit your complicated requirements in power conversion applications. Our cast resin phase shift transformers are suitable for high power conversations in industries such as Electric Vehicle charging. ATL is also capable of supplying cast resign transformers for your bespoke applications with non-standard voltages & vector groups.   

Technical Data
Power Range100kVA to 25MVA
Input voltageup to 20kV
FrequencyTypically rated, 50/60 Hz
(Suitable for 45Hz to 65Hz)
Output voltageup to 33kV
StandardsIEC 60076
Ambient Temperature-25 to 50°C


Our In House Developed Programmes Delivery the Optimum Solution

Decades of experience developing magnetic’s to Industry manufacturing standards ensure that our products deliver high efficiency, long asset life, and ultimately zero failure rates.

ATL’s wealth of industry experience designing custom solutions has built a high level of knowledge used to create our own in house  highly sophisticated design programmes. These programmes give us flexibility within any design while giving customers an economically efficient tailored solution.

Utilisation of these programmes allows us to deliver the optimum design for our clients requirements delivering cost reductions and high levels of efficiency throughout the design.


Want more information on Cast Resin Transformers?