Electrical technical

TRIGLASS® electrical technical composite profiles (VTR – GRP – PRFV), reinforced with fibreglass, have long been widely used in this sector.
Pultruded profiles are invaluable in the production of electrical equipment, such as dry-type transformers, electric motors and coils.
Depending on their section, they can be placed to protect the edges of the core (corner sections) or at regular intervals on the face of the core (dogbone).
They provide an important form of support in insulating spacing in windings while simultaneously assuring internal ventilation channels between layers.
Their main strength is having excellent electrical insulation ability. This characteristic makes them ideal for use in the aforementioned systems when strong electrical current is involved.
Production of a halogen-free, self-extinguishing UL 94V0 version is available upon request.
All products meet the European Directive 2011/95/EC (RoHS 2), restricting the use of hazardous substances in electrical and electronic equipment.
They assure Thermal Class F and H (operating temperatures of 155°C and 180°C, respectively) depending on the polymer used in their matrix.
All TRIGLASS® electrical technical profiles have been laboratory tested to ensure the above technical specifications.
Top Glass has a wide range of profiles in stock to rapidly meet customer requests. Profiles can also be custom cut prior to final packaging.


What are the possibilities?

  • Electrical equipment
  • Coils
  • Electric motors
  • Dry-type transformers

Our product advantages in this sector: Electrical technical

Composite materials can be worked using conventional woodworking machines that have the ability to use diamond tools and/or those specified for fibreglass. You can also perform other operations on them such as connections with bolts, screws and rivets as well as gluing and painting.

The amorphous structure of composites stands up very well in large temperature fluctuations without presenting significant or permanent sectional deformation. The response of the material to applied loads is practically always in terms of elasticity. It has low creep and is consequently very stable.

Predicting the durability of composite materials is a topic Top Glass has studied for a long time. Our findings suggest optimal behaviour in outside conditions and bad weather. Of course, special conditions should be assessed to select the raw materials best suited to maximizing long-term mechanical and aesthetic features.

Fibreglass-based materials and thermosetting polymers have high dielectric capacity. Both components are inherently excellent electrical insulators. This characteristic is related to their optimal response to arc discharge, tracking, and surface and density resistivity.

Fibreglass composite materials have a very low thermal conductivity coefficient, around 0.3 W/mK. This feature offers significant advantages in situations where energy loss might have a negative impact, both economically and functionally. This is particularly the case in the fields of construction and thermal insulation.

The specific gravity of pultruded material is about 1.8 g/cm ³. It is much lighter than steel (7.85 g/cm ³) and aluminium (2.7 g/cm ³). Its high performance relative to weight allows the design of structures with low energy impact. Its lightness is also an advantage in relation to transport and logistics as well as low response to inertial forces, relevant to building structures in seismic areas.

The mechanical properties of composites are generally high and can be customized to take advantage of the anisotropy of reinforcement structure. The strongest enhancements have been in the longitudinal direction, which coincides with the direction of the pultrusion process. Resistances in that direction are now comparable to those of steel. In the case of unidirectional composites, longitudinal strength values can be triple those of steel. In contrast to traditional metal materials, pultruded profiles reflect behaviour that is elastic-brittle until breaking.

Composites have an excellent ability to withstand environmental agents and highly aggressive chemicals. A wide range of resins makes it possible to design materials adapt for contact with diverse chemicals, especially acids, alkaline substances and solvents.

Fibreglass composite materials have a very low thermal conductivity coefficient, around 0.3 W/mK. This feature offers significant advantages in situations where energy loss might have a negative impact, both economically and functionally. This is particularly the case in the fields of construction and thermal insulation.

Main products used in this sector: Electrical technical