General

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

Here at R Baker (Electrical) Ltd we can create specific test transformer solutions to directly meet your requirements. We have worked with many companies to create turnkey solutions that require the use of a test transformer.

We can meet various requirements including adding the potential to switch between input/output voltage, building the transformer on a moveable rail and a whole host of other custom manufacturing solutions. Whatever your personal requirements, we can design and build the ideal transformer for you.

Our testing transformer range

Our state of the art facilities and ability to outperform our competitors means that we are able to meet demands for fast turnaround solutions for industrial, military, offshore or commercial sectors. Our goal of providing the best product and service possible enables us to deliver exactly what you need at precisely the time you need it without sacrificing the quality of the product. We are here to help, so if you would like to discuss your requirements with us without any further obligation, don’t hesitate to get in touch with us. You can do this via our contact form, or call us on 0151 486 6760 where one of our knowledgeable and friendly team members would be happy to speak to you.

Additionally:

  • Our expert team are available 7 days a week for time sensitive jobs
  • Our lead-time is second to none
  • Competitively priced solutions
  • All products durable & robust in their construction
  • We offer full bespoke test transformer solutions
  • Input and output voltages available as you require
  • ATEX approved
  • Plug and socket options: ATX, CEAG, STAHL, Marechal
  • Electrical circuit protection options include short circuit fuse, MCB, RCBO and mains isolator

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

Our engineering team design testing 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 custom testing transformer range can be designed specifically to meet all of your requirements, no matter how unusual. Transformers generally conform to BS EN61558 and EN 60076, unless specific standards are requested and have protection against humidity and vibration.

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.

Our 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.

Our custom build 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.

Transformer range

Our transformers can be built for a wide range of environments and solutions. Have a look below at the wide selection of ways we can meet your needs:

  • 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

In addition to design & build work, we also offer a full repair/rewind service with a team ready 7 days a week for any emergency breakdown situations.

Please see our page dedicated to transformer repair/rewind for more info

Transformer enclosures

Our range of testing transformers 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.

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

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 moveable unit which would allow the operator the facility to move the transformer into place when testing equipment.

72kVA Testing 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.

10.5kW Transformer

Our engineering team were tasked to design a 10.5KW enclosed transformer, with the ability to vary the voltage manually. The customer required the facility to test their equipment at different set voltages for different periods of time. The transformer was designed so the user could easily connect the transformer to their equipment through a bus bar system.