Electrical insulation

Our solutions

Electrical insulation


Electrical insulation is a solution that increases the safety and reliability of your electrical equipment. Partner with Isola Composite today and deploy one of our dedicated solutions: generators, high-voltage motors, transformers, electrical cabinets and high-voltage circuit breakers, as well as HVDC systems and new hydrogen and electrical technologies.

Leveraging our 40-plus years of expertise, we produce technically adapted composite laminates to secure your equipment, enhance your systems, and validate your market reputation. Compatible with your systems and standard or specific requirements, the expertise of our Research and Development teams and tribology lab enable us to deliver on each of your technical specifications and to conduct on-site technical inspections.

We focus every effort on forging a close relationship and partnership with your dedicated technical department.



Close technical cooperation is the key to our success.

Isola Composite electrical insulation solutions

There are multiple ways to install effective electrical insulation, each with its own specific use. Isola Composite supplies a range of technological solutions based on various technical combinations.


In today’s market, Isola Composite is one of the world's leading electrical insulation manufacturers. We have acquired extensive experience in the design and manufacture of high-quality electrical insulation.

Download our product sheets

We produce insulating parts for different uses in the following fields:

Hydro and turbo generators, nuclear, high-voltage traction motors, diesel generators Composition and properties
Exciter Wedging and insulation parts Delmat and Silirite - 180°C insulation class, machined on drawings
Rotors U&L-shaped parts, slot insulation Glass and Nomex - class 180°C
Clubfoot L-shaped pieces (heel) 3 to 12mm heel - glass, Nomex, Teflon and epoxy
Slot or copper segment bottomhole packers Combination of glass and Nomex – Long-length option
Copper segment semi-polymerized insulation Prepreg Delbond type
Copper segment wedging Delmat®, Silirite, Polybrite – machined from drawings
Copper segment wedging
Stators Slot wedges Delmat® Epoxy, Silirite on drawings
Slot or copper segment bottomhole packers Insulation or conductors – long-length option
Wedging parts Delmat® and Silirite - 210, 180 and 155°C insulation class machined from drawings
Clamping system Round bars or threaded rods
Center shafts Machined insulation tubes
  • We produce all power generator types, including U & L profiles for rotor slots, slot insulators, separators, and mechanical conductor strengthening parts;

as well as high voltage motors, stator locking wedges and rotor slot insulation parts.

Dry-type transformers and high-voltage circuit breakers
Combs, reinforcement layers and supports Delmat® Polyester UP GM 203 GPO-3 with various specifications
Phase barriers Delmat® Polyester UP GM 203 GPO-3 with various specifications
Lifting arm Delmat® Epoxide 68660, 68690, 68670 and Delmat glass-reinforced Polyester resin
Cylinders Delmat® 68160 FHT flexible Polyester or glass tubes
Threaded rods Delglas 68835 and associated nuts
Support plates Delmat® Polyester or Epoxyde machined from drawings
Support insulation bars Delmat® Polyester UP GM 203 ir GPO-3 with various specifications
  • high voltage dry-type transformers as manufacturer of composite threaded rods, separators and copper segment combs;

circuit breakers and high-voltage electrical cabinets as designer and producer of control shafts.

Contact us today for HVDC and renewables inquiries.

Benefits of composite materials in electrical insulation


Composite materials present multiple benefits as far as the safety, performance and durability of your equipment is concerned.

High performance

These materials guarantee “high performance” materials with high resistance to conductivity. They are also shock-resistant and transparent to electromagnetic waves.

Adaptability

They are engineered for excellent machinability, increasing their adaptability to the design of your machines.

Sustainable life cycle

Our composite materials ensure sustainable life cycle assessments. They require few primary resources for their production and are harmless to both people and our planet. What’s more, they provide durability and recyclability.

Energy savings

They are an inexpensive solution for all your equipment, generating substantial energy savings. When it comes to your materials, opt for foolproof safety and unmatched quality from a reliable source with a guaranteed return on investment!

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