Compact drives, frequency converters, variable speed drives
Danfoss D-Frame VLT Drives can leverage back channel cooling and can be fitted optionally with semiconductor fuses. Smaller size reduces installation costs and increases flexibility.
Danfoss D-Frame VLT Drives are available in a power range from 125-450 hp (90-315 kW) and up to 68% smaller than previous generation D-Frame drives. This reduces installation costs and increases installation flexibility. These drives also leverage back channel cooling to remove 90% of the heat generated by the drive, reducing up front and ongoing costs and making them an ideal panel building solution, the company said.
The new drives are available with IP20, IP21 (NEMA 1) or IP 54 (NEMA 12) enclosure protection ratings. They also come standard with conformal coated printed circuit boards, which together with the optional heat sink access panel, help to extend drive lifetime and reliability. The new units can be factory-fitted with optional semiconductor fuses to further reduce installation costs. Additional factory-fitted basic input options -- such as mains disconnect, contactor, and circuit breaker -- eliminate the need to install these basic options externally.
D-Frame drives also use 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 dramatically reduced, according to the company.
- Edited by Chris Vavra, Control Engineering, www.controleng.com
Annual Salary Survey
After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.
The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.