High-voltage coils engineered for long-term reliability

Products Built for Decades of Reliable Service

Every coil, bar, and rewind kit we manufacture is engineered to extend the operational life of your critical rotating machines -- reducing risk, lowering total cost, and keeping your infrastructure running.

Our Products

Windings That Protect Your Assets

Diamond coils, high-voltage bars, and complete rewind kits -- each one engineered to deliver longer service intervals and faster return to operation.

High voltage coils manufactured by Preformed Windings

01

High Voltage Coils

When your generator or motor is a critical production asset, the coils inside it must deliver years of uninterrupted service. Our diamond coils, ranging from 6kV to 26kV, are manufactured with materials and processes specifically chosen to maximise insulation life and minimise the risk of in-service failure.

  • 6kV to 26kV diamond coils for long-term, dependable operation
  • Resin-rich or VPI insulation to match your operating environment
  • Industry-leading partial discharge levels for extended service life
  • Customised to your exact slot dimensions and operating conditions
  • Full material traceability for regulatory compliance
  • Up to 10-year reliability guarantee on every coil
Request specifications

02

High Voltage Bars

For large turbo generators and hydro generators, high-voltage bars demand the highest levels of precision and insulation integrity. Our bars are manufactured with Roebel transposition where required, using the same rigorous quality and testing programme that backs every product we make.

  • High-voltage bars for large turbo generators and hydro generators
  • Roebel transposition for reduced eddy current losses
  • Resin-rich or VPI insulation systems available
  • Manufactured to exact slot dimensions and customer specifications
  • Full material traceability and comprehensive test documentation
  • Up to 10-year reliability guarantee on every bar
Request specifications
High voltage bars manufactured at Preformed Windings

03

Winding Kits

Every hour your machine is offline costs money. Our complete rewind kits are designed for the fastest possible turnaround -- everything arrives together, fits perfectly, and gets your asset back to full capacity with minimal downtime.

  • Minimise rewind time and get machines back online faster
  • Drop-in compatibility eliminates fitment risk
  • Complete kits reduce procurement complexity
  • Available for all major motor and generator types
  • Designed to improve efficiency over original specifications
  • Custom kits manufactured to your exact requirements
Request specifications
Winding kits being assembled at Preformed Windings

Insulation Systems

The Right Insulation for Your Operating Environment

Our obsession with quality starts with the insulation system — it's what determines the long-term reliability of every winding. We help you select the technology that will maximise service life for your specific operating conditions.

Resin Rich

Resin-rich insulation provides excellent void-free insulation with consistent dielectric properties. Pre-impregnated mica tapes are applied and cured under heat and pressure, producing coils and bars with predictable and repeatable quality.

  • Consistent dielectric properties
  • Predictable and repeatable quality
  • Excellent void-free insulation

VPI (Vacuum Pressure Impregnation)

VPI insulation involves impregnating wound coils and bars with resin under vacuum and pressure. This method provides excellent penetration of the insulation system, resulting in outstanding thermal conductivity and moisture resistance.

  • Excellent resin penetration
  • Outstanding thermal conductivity
  • Superior moisture resistance
Engineering team providing coil specification assistance

Expert Guidance

We Help You Make the Right Decision

Selecting the wrong coil or bar specification can shorten asset life and increase failure risk. Our engineers provide complimentary consultations to ensure you get the optimal product for your operating conditions -- protecting your investment from day one.

  • Complimentary coil and bar specification consultation
  • Accurate budget quotations based on name plate data
  • Virtual tours of our manufacturing facilities
  • 95% of quotations sent within the same day
Request a consultation

Ready to Extend the Life of Your Critical Assets?

Talk to our engineers about the right coil and bar product for your application. 95% of quotations delivered within the same day.

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