For restricted spaces, Sprint Electric supplies space-saving controllers for dc motors. The non-isolated single-quadrant variable speed dc drives of the 340, 680 and 1220 series clip onto a DIN rail. With a footprint of only 35 x 105mm, they are equally suited for installation in existing control cabinets as in new designs in which mounting space is at a premium.
The controllers' design saves space and allows placement adjacent to other control panel components. Easy access to drive adjustments, plug-on screw terminals and the DIN-rail-mounting package mean that these controllers clip into place without needing further engineering. The dc controllers are designed to control permanent-magnet or shunt wound dc motors. Power ratings range from 0.55 to 1.8kW at 180V dc armature voltage. Despite their small size, the controllers impress with features such as a dual voltage supply and selectable AVF or tacho feedback.
DC drives from Sprint Electric are being used in many different applications including the metal processing industry, the pulp and paper industry, rubber and plastic processing, lifting equipment, food processing, pharmaceutical and chemical manufacturing. DC drives from Sprint Electric cover a power range from 0.37 to 265KW. Over fifty models are available - analogue or fully digital - covering both single phase and three phase, regenerative and non-regenerative applications; from low voltage servo performance controllers to highly sophisticated fully digital three phase dc variable speed drives of many hundreds of amps.