Hospitals, tunnels and airports

  • Special considerations for hospitals

    Hospital ventilation has strict requirements regarding safety, compliance and efficiency. Danfoss provides AC-drive solutions for fire and smoke safety, heat dissipation, harmonic mitigation, and EMC and seismic compliance.
    Fail safe with no trips
    In hospitals, failure for any reason can jeopardize lives. Drives powering pumps and chillers must be extremely reliable and virtually immune to mains supply disruptions. To achieve this reliability, Danfoss AC drives are designed to ignore voltage sags and even short outages, maintaining full performance at all times.
    Protect applications and operators 
    The VLT® HVAC Drive FC 102 provides the STO (Safe Torque Off) function in compliance with ISO 13849-1 PL d and SIL 2, according to IEC 61508 / IEC 62061. In high demand applications, this can be expanded with the VLT® Safe Option MCB 140, an external module that provides functions such as Safe Stop 1 (SS1), Safely Limited Speed (SLS) and Safe Maximum Speed (SMS), control of external contactors and safety door monitoring and unlocking.
    Reliable harmonic mitigation

    While AC drives increase precision, save energy and extend application lifetime, they also introduce harmonic currents to the hospital grid. If not kept under control, harmonic currents can affect the performance and reliability of generators and other equipment.

    To ensure minimal disturbance, read more about our harmonics application know how, software tools and harmonic mitigation solutions.

    Special considerations for tunnels

    Metro and motorway tunnel operators demand strict ventilation performance for safe operation and optimized cost of ownership. The VLT HVAC Drive offerings, from low to high power, fulfill smoke and fire safety requirements and comply with seismic regulations. All our units offer the same HVAC-dedicated functionalities, standards compliance and compatible soft starters, filter and fieldbus communications options.

    Special considerations for airports

    With hundreds of thousands or even millions of passengers annually, ventilation is a top priority for international airports. To improve traveler comfort and safety, and to combat rising electricity prices, drives are increasingly being used to control and optimize the operation of air-handling units and reduce energy consumption.

    VLT HVAC Drives extend from low- to high-power solutions. They come equipped with HVAC-dedicated functionalities and compatible soft starters and filters for EMC and harmonics mitigation. And the complete range of fieldbus communications options enables effective integration with the building automation system.

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