Safe travels
Danfoss AC drives work with the complex HVAC systems in underground subway and train services as well as road tunnels. Providing reliable operation of cooling, ventilation and safety systems, our solutions ensure pollution-free and safe environments for millions of passengers the world over.
- Ensures continued operation of smoke extraction fans in the event of a fire
- Multi-zone feature allows for independent speed controls and airflow directions
- Secure uptime with condition-based monitoring
- Continuous control of motor cable connection to motor even in standby
- State-of-the-art EMC performance even with long motor cables
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Dedicated functionality that improves flow control and saves energy in industrial pump and fan applications.

Every AC drive application is different. DrivePro® Services is a collection of tailor-made products designed around your needs.
From optimized spare part packages to condition-monitoring solutions, customize our products to support your business through the different lifecycle stages of your AC drive.
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In air flow and indoor air quality-related applications, condition monitoring functionality improves system uptime and competitiveness by preventing issues before they occur.

Get more out of your air handling units, using fan control that gives you easy air filter monitoring and built-in fire safety features.

With user-friendly interfaces, distributed intelligence and reduced power consumption, Danfoss AC drives optimize the performance of fans.

Variable speed fan control reduces costs by trimming energy consumption, and improves comfort levels by avoiding noise-generating frequencies.
Case stories

FRANCE: Powerful VACON® NXP drives power the Tunnel Boring Machine (TBM) used in construction of a new hydroelectric power plant in the Alpe d’Huez region. The Italian contractor Cogeis operates this TBM to dig a tunnel with a 22% gradient. It’s part of an innovative project which will deliver 100% renewable energy to the grid.

Tailored for HVAC, flexible, modular and adaptable applications, the frequency control has played a key role in the ventilation system. It was the perfect fit, both in terms of EMC requirements, safety, harmonics, long cable lengths and dimensions, as well as its ability to function in temperatures of up to 50°C without loss of power.

Cityringen brings a new, completely automated underground line to the center of the Danish capital.

800 m of unscreened motor cable, interference free? Micheville Tunnel used VLT® HVAC Drive to achieve a high-efficiency, low-harmonic solution featuring exactly this. They even reduced costs by eliminating a voltage booster transformer.






