High Voltage Coils

Houghton International supply a range of high voltage coils specifically designed for the repair market, including HiFLEX - our fully cured, fully tested, totally flexible insulation system for improved fit, quicker installation and reduced risk of damage.

Operating globally, we offer a range of resin rich and global VPI insulation systems for industrial, power generatin and hydro applications. We manufacture stator, armature, field and rotor coils for all types of motors and generators up to 15kV, in diamond and concentric coil designs.

With over 30 years multi industry experience in electro mechanical engineering we offer:

  • Supply and manufacture of premium high voltage coils and auxiliary winding kits
  • Fully tested with a 5 year warranty
  • Specialist electro mechanical engineering support
  • Computer aided design, performance upgrade and reverse engineering capabilities
  • Worldwide in situ support services
  • ISO certified manufacturing facility with state of the art coil press

We currently export to over 28 countries worldwide, including Canada, Greece, Hong Kong, Indonesia, Australia, Nigeria, Norway, Venezuela, Malaysia, the Middle East, the USA and the Caribbean.

Customers are kept up to date using our Houghton Exchange video communication technology which offers live work in progress updates, visual diagnostic reports and live test results via video link to all them to keep track of their HV coils wherever they are in the world.

All full data quotes are presented using our new AutoCoil design software, utilising the latest technology to offer 3D coil design and slot build drawings for improved design and accurate fit.

Using our extensive manufacturing expertise, we have developed a comprehensive range of insulation systems suitable for all applications, including –

  • HiFLEX™ Our innovative, fully tested, totally flexible, insulation system.
  • HiRES™ Our B-stage end winding solution
  • HiBRID™ Our unique insulation system combining the merits of Vacuum Pressure Impregnation (VPI) and resin rich technology
  • HiVAX™ Our VPI insulation system

We manufacture high voltage coils up to 15kV with the capability for diamond coils up to 6.4 meters (21ft) in length knuckle to knuckle, 4.5 meters (14.10ft) slot pressing capabilities and a span of 1.82 meters (6ft).

We are also experienced in the manufacture of half bar systems, which are used in the winding of turbo generator machines up to 70MW.

Houghton International is highly confident in the quality of our coils and insulation systems and is proud to stand by them by offering an extended warranty. Our coils are designed to the highest standards and are fully tested prior to being dispatched, we see no reason they shouldn’t preform in line with the life expectancy of the refurbished machine.

As repairers ourselves, we understand the repair market is increasingly competitive and want to support our customers to give them the best chance of securing the rewind contract. By working with our customers to offer longer term quality assurance and standing by our workmanship we believe we can support a more attractive offer to the end user/asset owner where reliability is a key concern.

Warranty cost and duration can be tailored in line with customer requirements and the criticality of the repair.

Our state of the art manufacturing facility comprises of a comprehensive range of automated shaping machines and electrically heated hydraulic presses.

Through a team of specialist pre-formed winding technicians we are also able to support our customers by carrying out rewinding projects in their facilities or on-site on a global basis.

We also have facilities for in-house testing; lamination, turn to turn, tan-delta and tip up, voltage endurance, partial discharge and hi-pot.

Our quality assurance model, accredited to ISO 9001:2008, is designed around the requirements of each individual type of coil, meaning we create a dedicated quality management system bespoke to each individual product. This process consistently produces industry-leading insulation systems.

Further information

Range of insulation systems

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  • Fully equipped, large machine repair facility
  • Range of dynamic and load testing capabilities
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  • 24/7 emergency repair service, 365 days a year
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With a focus on safety, equipment is fully repaired and tested in our IECEx certified facility ensuring optimum performance and reliability.  Our qualified site service engineers monitor and maintain rotating machines in challenging offshore environments globally.

  • IECEx certified repair shop
  • Multi-disciplined site services team
  • Large machine repair capabilities
  • Range of dynamic and load testing
  • In house coil manufacture
  • Strategically located for quick mobilisation
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Houghton International supports maintenance teams across the UK to maximise plant efficiency and reliability whilst minimising machine downtime and cost, providing ongoing monitoring, maintenance and emergency repairs.

  • Multi service offering covering all electric motors
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The coils and related products are of very good quality. We know that good materials and an efficient manufacture control are employed, so, the final product that we receive matches and exceeds the technical requirements requested.

Rolando Rodriguez, Electromotores

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