Special Transformers and Reactors

BRUSH Transformers has an extensive tried and tested trajectory supplying application specific special designs and current series limiting reactors using fluid filled technology.


Using our vast experience and in-depth design and manufacturing history, we supply special transformers and reactors for a wide range of sectors, including:

  • Motor unit transformers for industrial applications and petrochemical plants
  • Rectifier transformers for traction systems
  • Traction supply transformers
  • Auto-transformers
  • Trackside booster transformers 
  • Furnace transformers 
  • Liquid filled series limiting reactors


Our transformers can be designed to many national and international specifications, and can be tailored to our client’s individual requirements. Specifications include:

  • IEC
  • ANSI
  • Shell DEP
  • Aramco
  • Rail

Key benefits

Installation & commissioning support
Custom solutions
System decarbonisation
High efficiency
Reactive power contribution

Technical Specifications

Special TransformersReactors
High efficiency transformers based on EU EcoDesign Directive EU 548 and Tier 2 efficienciesProven design technology
Alternative cooling fluids including Midel and FR3 for environmentally sensitive or urban sitesVoltage class up to 66 kV
Low noise level transformers with advanced core build technology and variable speed fan optionsThrough-put MVA up to 100 MVA
Designs are calculated for minimal partial discharge values through an optimised insulation structure that extends operational lifespanCopper or aluminum wound reactors
Condition monitoring options via fibre optic temperature sensors & gas detection systemsAir-core magnetically shielded reactors
Compact transformer design reduces overall substation footprint enabling significant savings in civil costsThree-phase coil mounted one above the other or horizontally to suit site layout
Cooling methods ranging from naturally cooled to directed-oil via pumps and forced-air via fans
Tap changing by on-load (bolt-on or in-tank) or off-circuit switching devices. Remote Tap changer control panels can also be supplied
Full range of accessories and protection devices available including digitally enabled options as well as condition monitoring equipment


Whether your requirements call for a DNO approved transformer or a bespoke solution, BRUSH covers the vast majority of applications.

Key Features

Compact transformer design
Reduces overall substation footprint enabling significant savings in civil costs
High efficiency
Transformers based on EU EcoDesign Directive EU 548 and Tier 2 efficiencies
UK manufacture
In-house winding, full assembly and testing at our Loughborough factory

Transformer Services

We provide lifecycle management and support from initial system analysis, to design, engineering, supply, installation, commissioning and upgrades of equipment through to repurposing or decommissioning.

Man holding a ball of energy symbolising connections

Speak to our team

BRUSH has a global reputation for service excellence and dedicated customer support. With a wealth of experience spanning more than 145 years and significant in-house knowledge and expertise, our commitment to excellence is backed by experience and knowledge.

Whether it’s the provision of parts, the delivery of service support in the field, at the customer’s premises or at our network of service workshops, our team of highly experienced engineers are on hand to support.