POWERFORM Electric Controls has announced the extension of its variable speed drives for single phase fan motors to provide a range of 5 amp, 8 amp and 10 amp units.
Each VSD will accept either 0-10 volts or 4-20 milliamps as control inputs. The fan speed response range and the maximum and minimum fan speeds are adjustable.
All VSDs have a minimum fan speed over-ride feature and auto shut-down in the event of control signal failure. The control circuit is electrically isolated from the power circuits.
The VSDs are designed and manufactured in Australia. They comply with EMC regulations and are intended to complement Building Management Systems.