Cast Resin Transformers

New and refurbished cast resin transformers
— for sale or hire

The UK’s Largest Stock of Cast Resin Transformers

We are a leading UK supplier of quality new and refurbished cast resin dry type transformers, specifically designed for indoor use.

Manufactured and tested in accordance with internationally recognised standards (IEC60076 or equivalent), we supply highly reliable transformers to cover all common applications, including:

Hospitals, Public &
Commercial Buildings

Manufacturing & Industry

Data Centres

Sensitive Environments


Cast resin transformers can be supplied standalone or complete with IP rated enclosures & HV/LV switchgear for a package substation solution.

We sell and hire cast resin transformers on a ‘supply only’ basis, or with optional on-site installation and commissioning by our own Contracting division.

Need assistance with a cast resin transformer?
Discuss your requirements with our experts today.

New Cast Resin Transformers

We partner with MF Trasformatori & BEST Transformer to distribute their cast resin transformers in the UK & Ireland. With access to the production capacity and capability of two leading manufacturers, we supply quality new transformers at competitive prices in as little as 8 weeks.

Cast Resin Transformer Range:

  • Ratings from 100kVA to 10MVA
  • Typical 11000/433V or 11000/415V voltage ratio, +/- 2.5 or 5%
  • Ecodesign Tier 2 losses
  • Aluminium or copper windings
  • ANAN or ANAF (fan) cooled
  • Supplied standalone (IP00) or with a variety of IP rated enclosures
  • Wide range of ancillaries
  • 18 month warranty

Also Available:

  • 33kV, 20kV, 11kV, 6.6kV and other primary & secondary voltages
  • Cast resin power transformers up to 30MVA
  • Associated HV and LV switchgear
  • Complete busbar connected LV distribution boards


New 1000kVA cast resin transformer

Refurbished Cast Resin Transformers Available From Stock

As the UK’s leading supplier of refurbished transformers, we typically have up to 30 cast resin transformers available immediately from stock.

Secondhand transformers are a fast, flexible and pragmatic solution for temporary or urgent requirements, budget restrictions or those looking for an enhanced return-on-investment


Cast Resin Transformers
Refurbished 2.5MVA cast resin transformer

Refurbished Cast Resin Transformer Range:

  • Ratings from 500kVA – 4MVA
  • 11kV, 6.6kV & 3.3kV primary voltages
  • Aluminium or copper windings
  • Standard or Ecodesign Tier 1 losses
  • Short lead time
  • Up to 40% cheaper than new
  • 24 month warranty
  • Purchase or hire
  • Standalone (IP00) or with IP rated enclosure
  • Option to supply with new or refurbished HV/LV switchgear or busbar connected LV distribution board

Do you prefer to get in touch with us via email?
No problem, we will respond to your enquiry without delay.

Cast Resin Transformer Accessories & Services

Both new and refurbished cast resin transformers can be supplied with a variety of accessories and related products. We also provide a wide range of services to owners and operators of cast resin transformers.

Accessories include:

  • IP rated enclosures
  • Temperature sensors & gauges
  • Fans, ventilation & associated control systems
  • Anti-vibration pads
  • Automation & monitoring systems
  • HV RMU, circuit breaker or isolator
  • LV feeder or freestanding/busbar connected LV distribution board
  • Containerised transformer substation

Services available:

  • Transformer installation & cable works
  • Transformer testing & investigation
  • Transformer servicing & maintenance
  • Transformer repair & refurbishment
  • Transformer emergency call-out
  • Transformer hire
  • Transformer condition assessment
  • Transformer upgrades
  • Transformer spare parts
  • Transformer removal & purchase


Package substation consisting of refurbished 2500kVA cast resin transformer inside new IP40 enclosure & LV board

Why Choose Slaters Electricals?

We pride ourselves on our ability to supply quality transformers on a short lead time and our renowned after sales service.

With almost 100 years of transformer engineering experience and know-how, our success is built on consistently exceeding our customer’s expectations and an exceptionally high number of returning customers.

The following organisations choose cast resin transformers from Slaters:

Take the Next Step…

Experienced Electrical Engineers know to always call Slaters first.

Browse Our Stock of Cast Resin Transformers

Here is just a small selection of the many cast resin transformers we currently have in stock: