Baden Engineering And Manufacturing Pty Pack 22-TA

With a rated output of 22 kilowatts, the motor is among the stronger series types, of the kind driving larger centrifugal pumps, screw compressors or belt conveyors. Output of this order typically calls for a frame size around 180 millimetres shaft centre height and correspondingly sturdy foundations. The starting current for motors of this class runs well above the rated current, which is why star-delta starting is common.

Under IEC 60072 the frame size sets the shaft centre height and therefore the foot and flange dimensions, so that motors of the same frame size from different makers stay mechanically interchangeable. The squirrel-cage rotor is standard in industrial motors of this kind, while slip-ring rotors are reserved for high starting torque. Protection ratings follow IEC 60529, mounting arrangements IEC 60034-7, for example IM B3, IM B5 or a vertical V1 version. Running it from a frequency inverter raises the demands on winding insulation.

Before buying, check the rating plate and whether voltage and frequency match the intended supply. Turned by hand, the shaft should run freely and quietly; rattling or catching points to worn bearings. The terminal box and cabling deserve a look for corrosion or cracked insulation, which an insulation test clarifies. For inverter duty the winding must be rated accordingly, otherwise premature insulation failure can follow.