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 1 or 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 to suit your requirements 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.

or first browse our current stock of distribution transformers below:

ImageManufacturerPowerVoltage RatioCoolingVector GroupHV TapsDetailshf:att:pa_manufacturerhf:att:pa_powerhf:att:pa_voltage-ratiohf:att:pa_coolinghf:att:pa_vector-group
May & Christe630kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmay-christe630kva11000-433vair-cooled-cast-resindyn11
Legrand1000kVA11000/417VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailslegrand1000kva11000-417vair-cooled-cast-resindyn11
France Transfo1250kVA11000/433VAir Cooled Cast ResinDyn11+7.5 to -5% in 2.5% stepsShow detailsfrance-transfo1250kva11000-433vair-cooled-cast-resindyn11
France Transfo1250kVA11000/433VAir Cooled Cast ResinDyn11Show detailsfrance-transfo1250kva11000-433vair-cooled-cast-resindyn11
Merlin Gerin1500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmerlin-gerin1500kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters1500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters1500kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters3150kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters3150kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters2500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters2500kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters2000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters2000kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters1600kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters1600kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters1250kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters1250kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters1000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters1000kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters800kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters800kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters630kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters630kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters400kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters400kva11000-433vair-cooled-cast-resindyn11
Cast Resin Transformers
Slaters250kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsslaters250kva11000-433vair-cooled-cast-resindyn11
Trafo Union 1600kVA 11000/433V Cast Resin Transformer
Trafo-Union1600kVA11000/433VANAF Cooled Cast ResinDyn11±2.5 & 5%Show detailstrafo-union1600kva11000-433vanaf-cooled-cast-resindyn11
Alstom 1000kVA 11000/433V Cast Resin Transformer
Alstom1000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsalstom1000kva11000-433vair-cooled-cast-resindyn11
May & Christe 1500kVA 11000 or 6600/433V Cast Resin Transformer
May & Christe1500kVA11000/433V, 6600/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmay-christe1500kva11000-433v 6600-433vair-cooled-cast-resindyn11
France Transfo 1250kVA 6600/433V Cast Resin Transformer
France Transfo1250kVA6600/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsfrance-transfo1250kva6600-433vair-cooled-cast-resindyn11
Starkstrom 2000kVA 11000/433V Cast Resin Transformer
Starkstrom2000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsstarkstrom2000kva11000-433vair-cooled-cast-resindyn11
Schneider 500kVA 11000/433V Cast Resin Transformer
Schneider500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsschneider500kva11000-433vair-cooled-cast-resindyn11
Pauwels Trafo 1000kVA 11000/433V Cast Resin Transformer
Pauwels Trafo1000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailspauwels-trafo1000kva11000-433vair-cooled-cast-resindyn11
France Transfo 1600kVA 11000/433V Cast Resin Transformer
France Transfo1600kVA11000/433VANAF Cooled Cast ResinDyn11±2.5 & 5%Show detailsfrance-transfo1600kva11000-433vanaf-cooled-cast-resindyn11
May & Christe 1000kVA 11000/433V Cast Resin Transformer
May & Christe1000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmay-christe1000kva11000-433vair-cooled-cast-resindyn11
May & Christe 1000kVA 11000 or 3300/433V Cast Resin Transformer
May & Christe1000kVA11000/433V, 3300/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmay-christe1000kva11000-433v 3300-433vair-cooled-cast-resindyn11
Tesar 2500kVA 11000/433V Cast Resin Transformer
Tesar2500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailstesar2500kva11000-433vair-cooled-cast-resindyn11
May & Christe 500kVA 11000/433V Cast Resin Transformer
May & Christe500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmay-christe500kva11000-433vair-cooled-cast-resindyn11
Merlin Gerin 1250kVA 11000/433V Cast Resin Transformer
Merlin Gerin1250kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmerlin-gerin1250kva11000-433vair-cooled-cast-resindyn11
Pauwels Trafo 2000kVA 11000/433V Cast Resin Transformer
Pauwels Trafo2000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailspauwels-trafo2000kva11000-433vair-cooled-cast-resindyn11
Pauwels Trafo 1600kVA 11000/433V Cast Resin Transformer
Pauwels Trafo1600kVA11000/433VANAF Cooled Cast ResinDyn11±2.5 & 5% BY LINKSShow detailspauwels-trafo1600kva11000-433vanaf-cooled-cast-resindyn11
Pauwels Trafo 1000kVA 6600/415V Cast Resin Transformer
Pauwels Trafo1000kVA6600/415VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailspauwels-trafo1000kva6600-415vair-cooled-cast-resindyn11
Pauwels Trafo 1600kVA 6600/416V Cast Resin Transformer
Pauwels Trafo1600kVA6600/416VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailspauwels-trafo1600kva6600-416vair-cooled-cast-resindyn11
France Transfo 800kVA 11000/433V Cast Resin Transformer
France Transfo800kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsfrance-transfo800kva11000-433vair-cooled-cast-resindyn11
International Transformers 750kVA 6600/433V Cast Resin Transformer
International Transformers750kVA6600/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsinternational-transformers750kva6600-433vair-cooled-cast-resindyn11
Pauwels Trafo 800kVA 10750/400V Cast Resin Transformer
Pauwels Trafo800kVA10750/400VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailspauwels-trafo800kva10750-400vair-cooled-cast-resindyn11
MF Trasformatori 4000kVA 11000/3300V Cast Resin Transformer
MF Trasformatori4000kVA11000/3300VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsmf-trasformatori4000kva11000-3300vair-cooled-cast-resindyn11
Tesar 1600kVA 11000/3300V Cast Resin Transformer
Tesar1600kVA11000/3300VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailstesar1600kva11000-3300vair-cooled-cast-resindyn11
Alstom T & D  500kVA 11000/433V Cast Resin Transformer
Alstom500kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5%Show detailsalstom500kva11000-433vair-cooled-cast-resindyn11
Starkstrom 1600kVA 11000/420V Cast Resin Transformer
Starkstrom1600kVA11000/420VANAF Cooled Cast ResinDyn11±2.5 & 5%Show detailsstarkstrom1600kva11000-420vanaf-cooled-cast-resindyn11
Winder 1000kVA 11000/433V Cast Resin Transformer
Winder1000kVA11000/433VAir Cooled Cast ResinDy11±2.5 & 5% BY LINKSShow detailswinder1000kva11000-433vair-cooled-cast-resindy11
GBE 1000kVA 11000/433V Cast Resin Transformer
GBE1000kVA11000/433VAir Cooled Cast ResinDyn11±2.5 & 5% BY LINKSShow detailsgbe1000kva11000-433vair-cooled-cast-resindyn11