Power unleas­hed

As pioneers and indus­trial lea­ders, we are always one step ahead

Von Roll Inside
makes the difference

The use of electri­city in electri­cal machi­nes and devices is not pos­si­ble without a cus­to­mi­zed insu­la­tion sys­tem. In addi­tion, sen­si­tive elec­tro­nic com­pon­ents must be pro­tec­ted against mecha­ni­cal stress and envi­ron­men­tal influences.

We have deve­lo­ped the best solu­tion to meet these requi­re­ments. Our team of experts works clo­sely with well-known brands and glo­bal mar­ket lea­ders. For more than 100 years, even the most deman­ding cus­to­mers have been impres­sed by our products.

Con­ver­ting high vol­tage into high per­for­mance

Wind and water carry enor­mous amounts of energy. Our insu­la­tion sys­tems are enab­ling gene­ra­tors to con­vert this mas­sive power into electri­city. And con­ver­sely, when motors need to trans­form electri­city into mecha­ni­cal power, our insu­la­tion solu­ti­ons are essen­tial too.

Von Roll insu­la­tion sys­tems for high-vol­tage app­li­ca­ti­ons are a power­ful boos­ter for motors and gene­ra­tors. They make a huge con­tri­bu­tion in per­ma­nently impro­ving the effi­ci­ency, per­for­mance and dura­bi­lity of electri­cal machines.

Our one-sys­tem approach sim­pli­fies the com­plex inter­ac­tion bet­ween high-tech insu­la­tion tapes, high-per­for­mance com­po­si­tes, resins, var­nis­hes and wires. We are the only manu­fac­tu­rer in the world pro­vi­ding all these com­pon­ents and tailor-made solu­ti­ons from a sin­gle source.

Sys­te­ma­ti­cally matched

Electrical insulating tapes

Electri­cal insu­la­ting tapes 

Mica tapes are the key ele­ments for the main insu­la­tion of high vol­tage machines.

High-voltage resins

High-vol­tage resins 

Resins pro­vide pro­tec­tion against mois­ture and vibra­tion wear. They also incre­ase dielectric strength.

Composite materials

Com­po­site materials 

Com­po­site mate­ri­als rein­force the mecha­ni­cal sta­bi­lity of the winding.

Wire components

Wire components 

In our state-of-the-art coil manu­fac­tu­ring faci­lity, we cover the ent­ire value chain from flat wire to fully insu­la­ted coils.

Selec­ted fields of application

We are tech­no­logy lea­ders in various fields


Our solu­ti­ons are built-in to the lar­gest hydro­power plants in the world.


Our solu­ti­ons for nuclear, coal‑, gas- or oil power plants


The limi­ted acces­si­bi­lity and harsh con­di­ti­ons set hig­hest demands for the relia­bi­lity of insu­la­tion sys­tems used in wind power generators.


Von Roll actively sup­ports manu­fac­tu­rers in their efforts to improve the effi­ci­ency and power-to-weight ratio of AC and DC motors, trans­for­mers, etc.


Our solu­ti­ons enable large indus­trial machi­nes to achieve hig­her per­for­mance and relia­bi­lity at lower manu­fac­tu­ring costs.


Die­sel engine gene­ra­tors ope­rate under highly vola­tile loads and heavy con­di­ti­ons inclu­ding strong vibra­ti­ons and extreme tem­pe­ra­tures. We pro­vide reli­able insu­la­tion sys­tems for all electri­cal components.

More efficient

More efficient 

We are experts in maxi­mi­zing the ther­mal and electri­cal capa­city of the insu­la­tion sys­tem — impro­ving the effi­ci­ency of your machines. 

Stronger & more compact

Stron­ger & more compact 

Due to the impro­ved effi­ci­ency, your machi­nes will pro­vide more power at the same size — or you can opt for a more com­pact design. 

More durable

More durable 

Your machi­nes will fea­ture a lon­ger ope­ra­ting and ser­vice cycle — thanks to hig­her resis­tance against ther­mal, electri­cal and mecha­ni­cal stress. 



We pro­vide you with opti­mi­zed all-in-one sys­tems, which redu­ces mate­rial costs and sim­pli­fies the serial pro­duc­tion of your electri­cal machines.


From raw mate­ri­als to inte­gra­ted, ready-to-install components


The mar­ket for rota­ting electri­cal machi­nes, gene­ra­tors and motors is expe­ri­en­cing a strong out­sour­cing trend — dri­ven by major manu­fac­tu­rers. We have expan­ded our exis­ting plant in Ban­ga­lore into one of the most modern pro­duc­tion faci­lity for electri­cal coils in India. This has streng­t­he­ned our posi­tion as a pro­du­cer of inte­gra­ted and ready-to-install sys­tem components.

Von Roll is the only com­pany in the electri­cal insu­la­tion mar­ket to cover the ent­ire value chain from raw mate­rial extrac­tion to ready-to-install wire coils as a one stop shop. Con­trol­ling the ent­ire pro­cess enab­les us to deve­lop uni­que pro­ducts with the hig­hest qua­lity stan­dards. In close coope­ra­tion with our experts in Brei­ten­bach, our Indian faci­lity now also offers tech­ni­cal design, com­plete sys­tem tuning and manu­fac­tu­ring of ent­ire coil components.

Strong pro­tec­tion for sen­si­tive technology

Without even knowing, you have pro­bably already come into touch with one of our pro­ducts today. Eit­her in your car, in your home, or in indus­trial pro­duc­tion. Whe­re­ver electri­cal devices and elec­tro­nic com­pon­ents are used, our resins play an essen­tial role. They pro­tect sen­si­tive tech­no­logy in an effec­tive and very eco-friendly way. At the same time, they enhance dura­bi­lity and per­for­mance significantly.

In the course of Indus­try 4.0, digi­ta­liz­a­tion and elec­tri­fi­ca­tion, the demand for motors, sen­sors and electri­cal com­pon­ents is rising rapidly. As a lea­ding spe­cia­list for inno­va­tive resin sys­tems, we sup­port manu­fac­tu­rers world­wide in stay­ing ahead of these trends.

We stand out in par­ti­cu­lar with our high-per­for­mance range of sol­vent-free, green resins. They are extre­mely easy to apply and enable our cus­to­mers to achieve tech­ni­cal pro­gress in a way that is kind to human health and our climate.

With R&D cen­ters in Europe and the USA, Von Roll is a tech­no­logy lea­der and has a strong inno­va­tion track record. Our rese­arch teams work clo­sely with well-known brands and glo­bal mar­ket lea­ders on spe­ci­fic cus­to­mer projects.

Pro­tec­tion for electri­cal components

Our exper­tise for over 100 years

Impregnating resins

Imp­reg­na­ting resins 

Imp­reg­na­ting resins are used to pro­tect and sta­bi­lize induc­tive win­dings in motors and generators.

Potting resins

Pot­ting resins 

Pot­ting resins pro­tect elec­tro­nic com­pon­ents from envi­ron­men­tal impacts and overheating.

Insulation papers

Insu­la­tion papers 

Sheet insu­la­tion mate­ri­als are used in motors and electri­cal equip­ment as part of the main insulation. 

Protective coatings

Pro­tec­tive coatings 

Pro­tec­tive coa­tings cover prin­ted cir­cuit boards and elec­tro­nic com­pon­ents to pro­tect them from envi­ron­men­tal impacts.


We are tech­no­logy lea­der for insu­la­ting resins in various fields


Indus­try 4.0 demands hig­hest effi­ci­ency and endu­rance of indus­trial dri­ves, sen­sors and elec­tro­nics. Our newly deve­lo­ped resin sys­tems offer uni­que advan­ta­ges and solid protection.


The push for more power­ful electri­cal app­li­an­ces fea­turing ultra-com­pact motors crea­tes high engi­nee­ring chal­len­ges. Our imp­reg­na­ting resins pro­tect motors and elec­tro­nics in such devices even at maxi­mum speeds and under harsh environments.



Insu­la­tion resins are used in a wide range of app­li­ca­ti­ons for modern vehi­cles. They are essen­tial for the reli­able ope­ra­tion of elec­tro­nics, sen­sors, bat­te­ries and e‑motors.



Our resins pro­vide elec­tro­nic com­pon­ents with high levels of pro­tec­tion against envi­ron­men­tal influ­en­ces. Thanks to excel­lent heat dis­si­pa­tion, they enable more com­pact designs, e.g. for trans­mit­ter modu­les in 5G networks.


Inno­va­tive & eco-friendly


Are you loo­king for cost-effi­ci­ent solu­ti­ons for large scale serial pro­duc­tion? Our inno­va­tive sys­tems can be tailo­red very spe­ci­fi­cally to any desi­red application.

The Dol­ph’s® pro­duct port­fo­lio is extre­mely ver­sa­tile and inclu­des, among others, the well-known brands Dol­p­hon®, Hi-Therm® and Aqua-Therm®.

Dol­ph’s® does not only stand for over 110 years of expe­ri­ence. It has also been pionee­ring the deve­lo­p­ment of par­ti­cu­larly envi­ron­ment­ally friendly for­mu­la­ti­ons for deca­des. A majo­rity of our resins are already free of sol­vents and hazar­dous sub­s­tan­ces. Some of them are even com­ple­tely label-free.

With out­stan­ding ser­vice, Dol­ph’s® sup­ports cus­to­mers around the world in their efforts to com­bine maxi­mum func­tio­n­a­lity with hig­hest stan­dards of sustainability.

The che­mi­stry is right.
Peek inside our Inno­Lab!
Learn more


Electri­cal insu­la­tion news

Class H sys­tem of next generation

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

Top story wind

Coil shop

Von Roll is expan­ding the site in Ban­ga­lore into one of the most advan­ced cen­ters for the pro­duc­tion of insu­la­ted coils in India.

Press release

E‑Drive Test Lab 

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

Press release

110 years Dolph’s®

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

Read arti­cle