Machine Design

Compact enclosures

Compact enclosures house variable-frequency drives for machine and process control.

house variable-frequency drives for machine and process control. They accommodate VLT Series drives in the 125 through 350-hp range at 460 V and 90 through 250-kW range at 380 V. Two enclosure heights are available: one for less than 200 hp and one for 250, 300, and 350 hp. The units are designed for wall mounting with bottom conduit mounting, and an optional pedestal base allows floor mounting that raises the unit approximately 8 in. Features include fused/disconnect panel and bypass panel configurations, fire mode and run permissive mode, two and three contactor bypass, common start/stop functionality, undervoltage relay, dual motor selection, various fuse an disconnect options, control switches, indicator lights, NEMA-1 and 12 configurations, a dv/dt filter, and 3% reactor.

Danfoss North American Motion Controls, 4401 N. Bell School Rd., Loves Park, IL 61111, (800) 432-6367,

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