General

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

R Baker (Electrical) Ltd manufacture custom built transformers for a variety of uses. Our custom build transformers range from 18VA up to 1MVA, and can be either three or single phase depending on your specific voltage requirements.

Our technical team can design, modify and reverse engineer to your specification. All of the equipment we manufacture can be supplied with full working drawings, component lists and written instructions in any language.

Our Custom Built Transformer Range

We design and build bespoke transformers for use in commercial, rail, offshore and military applications. Our custom built transformer range can be designed specifically to meet all of your requirements, no matter how detailed, and our quick lead-time (available 7 days a week) means that we are always available when you need a rapid solution.

R Baker (Electrical) Ltd are a company you can rely on to get the job done in a time frame that suits you. We’re committed to providing a first rate service to each and every client we work with. Our transformers generally conform to BS EN61558 and EN 60076, unless other specific standards are requested, and we also provide protection against humidity and vibration.

We have consistently high levels and our procedures are monitored independently to BS EN ISO 9001:2000 standards. We also voluntarily subject ourselves to regular external and internal audits. We also work with all the leading testing and quality authorities such as BSI, DNV, Lloyds, NSN, Nemko and VDE for your continued peace of mind. Our custom built transformer range can be manufactured with any type of termination and incorporate into the design as required; our finger proof block terminals are shock proof and conform to BS EN standards. We also offer various styles and types; screw terminals, shrouded, din rail mounted, studs and fly leads.

Our custom built transformer range can be supplied with or without an enclosure. If required, we are able to supply transformers suitably protected by a sheet metal casing that can wall mounted or floor standing as needed. Or if preferred, we can offer bespoke enclosures constructed out of stainless steel, aluminium or ATEX suitable for use within gaseous and/or 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.

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

We work to your specification to produce the transformer solution that you require. Our solutions can be completely tailored to your meet your project and we will work to produce a custom transformer that is right for you.

Use our contact form or telephone us on 0151 486 6760 today to speak to one of our team about your exact requirements.

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

Our Transformer Range

Our product range can be made to cater for a wide range of uses and environments:

  • Current transformers
  • Auto transformers
  • Isolation transformers
  • Earthing transformers
  • Bushing transformers
  • Custom built transformers
  • Air cooled transformers
  • Air cooled transformers
  • Liquid cooled transformers (oil immersed)
  • Harmonic current reduction transformers
  • Step up and step down transformers
  • Delta/Star, Interconnected Star transformers
  • Auto wound, phase shifted scott & tapped delta transformers
  • Marine / offshore transformers
  • Transformer-rectifier units for D.C. power supplies
  • Military transformers / NSN / NATO transformers
  • Zone 1 and Zone 2 (Exd) hazardous areas transformers
  • Transformer maintenance programmes

Transformer repairs & rewinds

Our dedicated and highly skilled team can advise, maintain and repair or rewind transformers. 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 gaseous and/or dusty 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.

Case studies

8000A transformer

To manufacture an open style transformer designed to offer the customer 8000A at 9 volts. Our design team were required to design the transformer to be built on a movable unit which would allow the operator the facility to move the transformer into place when testing equipment.

Bespoke solution

Our client required a solution to increase production within the foam packing business. Our team worked with the client to develop and manufacture a single phase variable transformer which was designed to be installed on stainless steel table. This solution was designed for heavy usage and to reduce cutting time when cutting foam sheets.

72kVA variable transformer

We were tasked by a motor manufacturer to design a test unit which required our team to design a system with a 72kVA transformer and a drive to offer the facility for the operator to change the voltage, current and frequency. The unit was designed and manufactured within a stainless steel enclosure with a user control panel to offer ease of use.

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

Product overview

Voltage Up to 33,000 kV

Cooling <50 kVA Air Cooled >50 kVA Liquid Cooled

Sectors Offshore Petrochemical Pharmaceutical Defence Food

kVA Up to 500 kVA

Enclosure ATEX approved Zone 1 & Zone 2

Location Worldwide service