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

At R Baker (Electrical) Ltd we now have an in-house team dedicated to hazardous area manufacturing. We’ve developed the team in response to the ATEX directive leading to a marked increase in demand for bespoke solutions in process industries – especially in the petro-chemical, pharmaceutical and oil and gas fields. We design, manufacture and supply an extensive range of ATEX, IECEx and FM certified transformers specifically for these applications. All designs are bespoke and carry CE and ATEX certification for safe use in Zones 1 and 2, potentially explosive gas and dust atmospheres – wherever temperature class and ambient temperatures permit.

Hazardous area transformer (ATEX) range

Whether you need a custom built explosion-proof transformer or a standard style transformer for use in hazardous areas, we can provide exactly what you need and offer full design, manufacture and repair services for the whole range. We’ll work closely with your own teams to be sure we develop the right solution tailored to your particular circumstances. With over 30 years experience we pride ourselves in offering excellent customer support and are able to deliver to short lead-times for urgent jobs. We work to quality standards which are independently monitored to BS EN ISO 9001:2000 and subject to external and internal audits, and we work with leading authorities such as ATEX, BSI, DNV, Lloyds, ABS, NSN, Nemko and VDE.

Further more, we have a wealth of experience working with offshore and marine companies and so have been able to develop a range of Ex transformers.

Our transformers are used in hazardous environments across an extremely broad range of business sectors including; oil and petrochemical, pharmaceutical, military, nuclear and rail.

Transformer repair and rewinds

As with all of our other products we offer full repair, rewind and maintenance services across our range of ATEX products. Available 7 days a week to deal quickly with critical failure situations our electrical manufacturing and repair service can help with all repair and upkeep requirements. Whether you need help to develop your maintenance programme or a highly skilled team to fix a persistent equipment or component fault, we will be able to help.

Flameproof enclosure IIB

EJB Range

ATEX II 2 G Ex d IIB+H2 T6...T3 - II 2 D Ex tD A21 T85°C...150°C

IECEx Ex d IIB+H2 T6...T3 - Ex tD A21 T85°C...150°C

GOST (R&K) 1 Ex d IIB+H2 T6...T3 - A21 TA85°C...150°C

Flameproof stainless steel enclosure IIB


- ATEX II 2 G Ex d IIB+H2 T6...T3 - II 2 D Ex tD A21 T85°C...150°C

- IECEx Ex d IIB+H2 T6...T3 - Ex tD A21 T85°C...150°C

- GOST (R&K) 1 Ex d IIB+H2 T6...T3 - A21 TA85°C...150°C

Features & benefits

  • ATEX approved for use in Zones 1 and 2 gas and Zones 21 and 22 dust explosive atmospheres
  • Robust and durable construction
  • Waterproof and dustproof to IP66
  • Wide range of input and output voltages available
  • Supplied with ATEX approved plug if required
  • Plug and socket options include ATX, CEAG, STAHL and Marechal
  • Electrical circuit protection options include short circuit fuse, MCB, RCBO and mains isolator
  • Short lead times with completive prices

Hazardous area transformer range

  • 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

ATEX transformers

ATEX transformers

Our client required us to design and manufacture an Ex’d power transformer for use in a Zone 2 hazardous area, stepping down the input voltage from 220V AC to 110V. The design required two Eaton circuit breakers and 5 Schneider terminals, all of which meet the ATEX and IECEx standards

9kVA hazardous area transformers

Our engineering team manufactured a Zone 1 / 2 hazardous area transformer designed to isolate and step down the incoming 440 Volts, single phase (2 Phases of available 3), 50-Hertz supply to 240 Volts centre tap connected to earth. Our client required this solution in a short lead time and to be supplied with full working drawings, component lists and written instructions.

800VA - rail mounted transformer

We were tasked to manufacture an 800VA ATEX transformer designed to be used within a control panel. To be supplied with installer’s declaration, internal layout drawings, photographs of components, BOM and certificates for ATEX and IECEx standards.

Product overview

Voltage up to 3.3KV

Cooling Air (A/N) Oil filled

Sectors All sectors

kVA up to 60kVa

Enclosure Zone 1& Zone 2

Location Worldwide