Our technical team can help to design, modify and reverse engineer to your specification.

We are a leading design and build manufacturer of oil filled transformers who are highly trusted within our industry. Here at R Baker (Electrical) Ltd, we pride ourselves as being the UK’s top oil filled transformer manufacturers and offer a full range of bespoke design, build and repair services all delivered from an in-house team of experts at our base in Liverpool.

We are recognised for our levels of excellence in both manufacture and customer service and can provide turnkey solutions throughout the commercial and offshore markets as well as the industrial and military sectors.

Our oil filled transformer range

Our engineering team design and supply oil filled transformers for use in commercial, rail, offshore and military applications and we pride ourselves on excellent customer service, offering short lead-times for jobs that just can't wait. Our oil filled transformer range can be designed specifically to meet all of your requirements, no matter how unusual.

All our quality standards and procedures are monitored independently to BS EN ISO 9001:2000 and are subject to regular external and internal audits. We also work with all the leading testing and quality authorities such a BSI, DNV, Lloyds, NSN, Nemko and VDE to give you total peace of mind.

  • All transformers ATEX approved
  • ATX, CEAG, STAHL and Marechal plug / socket options
  • MCB, RCBO, Mains Isolator and Short Circuit Fuse protection options
  • Wide range of input and output voltages available
  • All components, working plan drawings available in all languages

Our custom built oil filled transformer range is designed for use in commercial, rail, offshore and military

Transformer range

We can create a solution for every type of environment and requirement. Our product range can be made to cater for a wide range of uses and environments:

  • Air cooled transformers
  • Current transformers
  • Auto transformers
  • Isolation transformers
  • Earthing transformers
  • Bushing transformers
  • Marine / offshore transformers
  • Bespoke transformers
  • Step up and step down transformers
  • Zone 1 and Zone 2 (Ex d) hazardous areas transformers
  • Harmonic current reduction transformers
  • Military transformers / NSN / NATO transformers
  • Liquid cooled transformers (oil immersed)
  • Transformer-rectifier units for D.C. power supplies
  • Transformers maintenance programmes

Features & Benefits

We work to your individual specification, and by listening to your requirements and offering our own expertise, we are confident we will produce the exact transformer solution that you require. Our skilled and dedicated team can advise, maintain and repair or rewind transformers, and our solutions can be completely tailored to your meet your requirement. It is our aim to deliver the utmost quality on each and every job we undertake.Use our contact form or call us on 0151 486 6760 and speak to one of our team members who are more than happy to chat about your requirements.

  • Competitively priced solutions
  • Quick turn-around lead times
  • 7 days a week service
  • Full turnkey solutions for all requirements
  • Maintenance & monitoring contracts
  • Transformer repair & renewal service
  • Very skilled & experienced in-house team
  • Planning & consultancy solutions

Transformer repairs & rewinds

As a part of the services for design & build we also offer a transformer repair/rewind service. We can exact repairs and rewinds as required. If this is a requirement, please see our page here to find out more about this service.

Transformer enclosures

Our single phase transformer range can be supplied with or without an enclosure. If an enclosure is required, we will supply transformers suitably protected by a sheet metal case which is wall mounted or floor standing. We also offer bespoke enclosures which can be constructed out of stainless steel, aluminium or ATEX enclosures suitable for gas and dust environments. Our standard cases are IP23 but we can supply up to IP66 if required, usually with little or no addition to lead-time or cost.

Our single phase transformer range can be manufactured with any type of termination and can be incorporated into the design of our transformers. Our finger proof block terminals are shock proof and conform to BS EN standards. We offer many styles and types; including screw terminals, shrouded, din rail mounted, studs and fly leads.


Product technical specifications

  • Short lead times with competitive prices
  • Robust and durable construction
  • Bespoke solutions
  • Wide range of input and output voltages available
  • Supplied with ATEX approved transformers
  • Plug and socket options include ATX, CEAG, STAHL and Marechal
  • Electrical circuit protection options include short circuit fuse, MCB, RCBO and mains isolator

Case studies

Repair of 750kVA transformer

Our team attended our client's site to remove a 3 phase 750kVa oil filled transformer which required one of the phases to be rewound. This was achieved with 2 day turnaround to ensure production was up and running as soon as possible.

Supply 1MVA transformer

Our team worked with a defence customer to offer a bespoke solution; with the requirement of high ambient temperature operation. This resulted in us supplying two 1MVA oil filled transformers to step down from 11kV supply. Our power transformer range are available as new or refurbished.

Product overview

Voltage Up to 33KV

Cooling Air (A/N)

Sectors All sectiors

kVA Up to 1MVA

Enclosure Up to IP66

Location UK