At COIL Innovation, we develop and manufacture state-of-the-art air-core dry-type reactors for the international energy market — key components in power transmission and distribution. Our site in Austria unites development, production and quality control under one roof, giving you the opportunity to work in an environment where innovation and quality truly matter.
Join a company that not only develops products but also shapes the future.
Here, you will find exciting projects, international perspectives, and the opportunity to make a real impact together with us.
Every air-core reactor starts with the preparation of the “winding mandrel”—a reusable form that acts as the coil’s skeleton. Our setup specialists manage these preparations between runs, meeting unique specifications for every single unit. At COIL Innovation, every reactor is a bespoke piece of engineering.
In the second stage, aluminum cables are wound with high precision around the mandrel. What sets us apart is our patented winding technology, ensuring maximum efficiency and reliability. The deep technical know-how of our operators ensures a seamless workflow for every custom-built reactor, from start to finish.
Stability meets durability. In this step, the coil is completely coated in epoxy resin and cured at over 100 °C to withstand the harshest conditions. Our specialists monitor this process with precision and expertise, ensuring that every unit meets our rigorous quality standards. At COIL, impregnation is more than just a process—it’s a guarantee of excellence.
Before the air-core reactor is sent to be painted, crucial preparations are carried out during final assembly. Our colleagues perform precise manual work, install key components, and ensure that every detail is perfectly in place. Only when everything has been prepared with the utmost accuracy does the reactor move on to the next stage, ready for its final protective coating.
In the fifth production step, our air-core reactor receives its final protective coating made of high-performance industrial paint. The light grey finish not only provides a clean and precise appearance but also reliably protects the reactor against environmental influences, mechanical stress, and long-term wear.
This ensures that every air-core reactor not only delivers outstanding technical performance but also maintains its durability and resilience over the long term. Quality that extends to the very outer layer.
Comprehensive electrical testing is carried out on every air-core reactor to ensure the highest quality standards. Each reactor undergoes a series of precisely defined test procedures to verify its functionality, safety, and performance.
Only after successfully passing all inspections and tests is the air-core reactor approved for shipment. This rigorous quality assurance process ensures that our customers can rely on maximum reliability and proven performance in every reactor we deliver.
In the final step, the air-core reactor is carefully packaged and prepared for safe transportation. We ensure that it is optimally protected and that our high quality standards are reflected all the way through to delivery.
Once ready, it begins its journey to customers around the globe, carrying with it the reliability, performance, and quality that define every reactor we manufacture.
Dr. Alexander Gaun explains:
“Imagine the small, inconspicuous component inside a water tap that ensures water flows evenly and filters out small particles such as lime or dirt. Without it, the water would spray uncontrollably — everything would run wild and unregulated. Air-core reactors in electrical grids work in a similar way: they limit sudden current changes, bring the flow of electricity to a defined, stable level, and keep the voltage within safe limits. This ensures that the electrical grid remains stable, protected and reliable — even when unexpected fluctuations occur.
Right now, the energy system is undergoing a comprehensive transformation — with the goal of becoming more sustainable, climate-friendly and resilient. This transformation goes hand in hand with a deep expansion and modernization of electrical infrastructure, and reactors play a key role in this process.”
Benefits at COIL Innovation
Become part of our team and benefit from many advantages.
Firmenradl.at
We enable our employees to use and purchase cost-effective bicycles.
Massages
We offer massages to maintain and increase the well-being of our employees.
Fitness Studio
We contribute to the annual membership fees of our employees at the Vitadrom fitness studio.
Flextime
We design the working hours of our employees flexibly
Training & Further Education
We support, promote, and challenge our employees with individual training and further education.
Lunch
We provide you with subsidies for lunch and offer fruit, coffee, and tea for free consumption.
Home Office
We create even more flexibility with an attractive home office option.
Pension Scheme
We increase the future pension entitlement of our employees with additional payments.
Firmenradl.at
We enable our employees to use and purchase cost-effective bicycles.
Massages
We offer massages to maintain and increase the well-being of our employees.
Fitness Studio
We contribute to the annual membership fees of our employees at the Vitadrom fitness studio.
Flextime
We design the working hours of our employees flexibly
Training & Further Education
We support, promote, and challenge our employees with individual training and further education.
Lunch
We provide you with subsidies for lunch and offer fruit, coffee, and tea for free consumption.
Home Office
We create even more flexibility with an attractive home office option.
Pension Scheme
We increase the future pension entitlement of our employees with additional payments.
COIL Innovation’s shunt reactors are used to compensate for capacitive reactive power generated by lightly loaded transmission lines or underground cables. They can be connected to the transformer’s tertiary winding or directly to the high-voltage (HV) bus or transmission line, supporting system voltages up to 550 kV.
Harmonic filter reactors are used in combination with capacitors and resistors to form filter circuits that reduce the harmonic content in power supply systems. Capacitor damping or inrush current limiting reactors are installed in series with the capacitor bank, while discharge reactors are connected to the bypass circuit.
Current limiting reactors are required to restrict short-circuit currents to levels compatible with the capability of other system components. Our product range includes applications for load flow control, load balancing, and bus-tie coupling. These reactors can be installed for the highest system voltages (up to 765 kV AC). COIL Innovation also supplies neutral grounding reactors, which are connected between the transmission grid’s neutral point and earth to limit line-to-ground fault currents.
The application of Flexible AC Transmission Systems (FACTS) involves various types of reactors: Thyristor-Controlled Reactors (TCR), Thyristor-Switched Reactors (TSR), Thyristor-Switched Capacitor Reactors (TSC),
Thyristor-Controlled Series Capacitor Reactors (TCSC), and Mechanically Switched Reactors (MSR).
Power Line Carrier (PLC) technology is a traditional, cost-effective, and reliable method of utilizing power supply systems for communication purposes. Connected in series with the transmission line, Line Traps exhibit low impedance at the power frequency and high impedance at signal transmission frequencies (30 kHz – 500 kHz). The international sales of Line Traps manufactured by COIL Innovation are handled by the Spanish-based company ARTECHE, which holds an exclusive agreement with COIL Innovation for a major part of the international market.
Strategic Partnership between COIL Innovation and PPC Cab
Jul 20, 2026 | News 2026
Eferding. COIL Innovation and PPC Cab are pleased to announce an enhanced capacity agreement. Building on their long-standing collaboration, production capacity for high-quality finished porcelain components will be reserved, creating greater planning reliability for both partners. In a market where production capacity is becoming increasingly limited, securing dedicated capacity in advance is a strategic step … Continued
Built to Power: COIL Innovation Opens Largest Site Expansion in Company History
May 26, 2026 | News 2026
Eferding. On May 22nd, the time had finally come: under the motto “Built to Power”, we celebrated the successful completion of our largest investment to date with over 400 guests. With the grand opening at our Eferding location, we are opening the next major chapter in our company’s history. Among the guests, we had the … Continued