High-Voltage Institut




Our competence center for high-voltage insulation of rotating machinery is one of the world’s leading institutes. It specializes in the development of electrical insulation systems for motors, generators and transformers.

As part of our groupwide product development, the institute plays an important role in the design, qualification and long-term testing for new products. In our research laboratory, we test product properties and effects of our innovations, such as how our resins influence the durability of insulation systems. As an innovation partner, we support leading manufacturers in external projects to develop customized insulation systems.

A cooperation with us gives you access to our experience and knowledge from over one hundred years.

Our test methods — solid ground for your decisions

  • High-Voltage Institut Von Roll - Teilentladung Test

    Electrical-thermal tests

    High-voltage tests for extreme stress — including standard-compliant documentation.

  • Vonroll
Mechanisch-thermische Tests

    Mechanical-thermal tests

    Physical tests after thermal aging, to document the lifespan of your machines.

  • E‑Drive Tests

    E‑drive tests

    Enabling your electric vehicle to go further than others. Find out which materials are ideal for your electric drives.

  • System tests

    Do you have special requirements? We simply test it all for you — down to the smallest detail.

Our service — take advantage of our know-how

Benefit from our unique expertise and experience: involve our team in the development of your insulation system at an early stage — as consultants, cooperation partners and testers. By developing innovative and efficient insulation systems, we help you to stay one step ahead of your competition.

Beratungsgespräch bei VonRoll


Tell us your specific requirements for high and low voltage insulation systems. We will respond with customized and fully tested insulation systems.

Contact us

Insulation Training edrive

Insulation training incl. e‑drive

In our training courses you will gain a detailed overview of insulation materials and systems for rotating high and low voltage machines. This includes topics like selection, processing and testing.

Learn more

SPOTLIGHT: A look into the practice

  • Klasse H System Von Roll

    Class H system of the next generation

    Generators will become even more efficient in the future thanks to our new Samicabond system.

    Read more
  • Coil shop in Indien von Von Roll

    Coil Shop

    Von Roll Bangalore becomes the most modern coil manufacturing center in India.

    Read more
  • E‑Drive Tests

    E-drive test lab

    Busy days in the eDrive Lab of our High-Voltage Institute.

    Read more
  • Dolphs Jubiläum Teaser

    110 years Dolph’s®

    Founded in 1910, our Dolph's® brand recently celebrated its 110th anniversary. Electrical Apparatus Magazine covered it. Curious?…

    Read more