Up to 67 per cent smaller than their predecessors, the new Danfoss D-Frame drives are optimised for high performance, reliability and compact dimensions in the 90-315 kW power range. In additio
n to the VLT’s energy efficiency, the drive helps to reduce initial panel and switch-room cooling costs with the innovative back-channel cooling concept.
With the increasing demands of improved efficiency and reliability in drive technology, OEMs, panel builders and end users are looking for new technologies that can save energy, reduce costs and complexity in a solution that will provide trouble-free operation for years.
The new D-Frame VLT drives are not only among the smallest in their class, they also include an array of efficiency and safety enhancing options as standard features, enabling customers and end users to reduce both initial and ongoing operating costs.
90-315kW with cost reducing features
Available in a power range from 90-315kW, the new units are factory-fitted with optional semi-conductor fuses. Additional options will also be available, including basic input options such as mains disconnect, contactor and circuit breaker, eliminating the need to install basic options externally.
For robust protection all drives come standard with coated printed circuit boards which, together with the optional heat sink access panel, help to extend drive lifetime and reliability. The new drives are available with IP20, IP21 or IP 54 enclosure protection ratings.
The new D-Frame drives use Danfoss’ unique and innovative back-channel cooling concept to keep electronics safely within optimal operation temperatures. The big advantage of back-channel cooling is that system installation and operating costs can be reduced dramatically.
Using a ducted back-channel, air is allowed to pass over the unit’s heat sink with minimal air passing through the electronics area. This way 90 per cent of the heat generated by the drive is exhausted directly outside of the enclosure, improving reliability and prolonging the lifetime of the unit. An IP54 seal between the back channel cooling duct and the electronics area of the VLT drive helps to significantly reduce temperature rise and contamination of the electronic components.