UL-approved GRP profiles

UL-approved GRP profiles

UL-approved GRP profiles

Ahlhorn | 12.11.2012

Various of our GRP profiles are also available in UL-approved versions.

This ensures that our customers have easier approval in their UL system and thus enables them to open up further markets.

The Dr. Dietrich Müller GmbH mainly supplies profiles that are used as insulation profiles in all areas of electrical engineering. Our profiles are used in particular in transformer construction as a dogbone and as a corner profile and in electrical engineering as a slot locking bar.

Various of our GRP profiles are also available in UL-approved versions.

This ensures that our customers have easier approval in their UL system and thus enables them to open up further markets.

Dr. Dietrich Müller GmbH mainly supplies profiles that are used as insulation profiles in all areas of electrical engineering. Our profiles are used in particular in transformer construction as a dogbone and as a corner profile and in electrical engineering as a slot locking bar.

UL approval is of particular importance here.

Reinforcement of the GRP profiles

Basically, all GRP profiles are cross-reinforced with glass fiber mats. Longitudinal forces are absorbed by rovings (unidirectional glass fibers), which are arranged in the core of the profiles. The profiles are equipped with a surface fleece for improved UV and weather resistance.

Manufacturing process for GRP profiles: pultrusion

The pultrusion process is a continuous manufacturing process in which reinforcing fibers (we focus on glass fibers) are impregnated with a thermosetting resin. Polyester and epoxy resin systems are used as resin systems in our production.

The glass fibers impregnated in the resin are fed to the heated tool according to the profile geometry. The hardening takes place in the tool.

The GRP profile is continuously pulled through the tool with a trigger and cut to size with a saw.

Tools for the production of GRP profiles

You can see from our spreadsheets which tools we have already created. New tools are constantly being added. So if you need other dimensions, please send us an inquiry.

Applications for GRP profiles

Electrical engineering:

Slot wedges, slot head inserts, brackets, bandage rings, retaining blocks, strips

Transformer construction:

Bars, cooling channels, tie rods, supports, covers, air gaps, wound bodies

Switch construction:

Shift rods, tie rods, push rods, spacers, fastening elements

General electrical engineering:

Terminal strips, antenna masts, brush holders

Tear-off fabric

It is also possible to roughen the surface of the GRP profiles with a tear-off fabric so that they can be bonded more easily.

Machined parts from GRP profiles

Of course, you can also buy machined parts made from GRP profiles from us. These can then be used as ready-to-install Insulating parts be used.

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