Product Details

W21 – Cast Iron Frame – IE2

Three phase asynchronous motor, with lower acquisition cost and high technology. Easy to adapt to the most application types, allowing to your company agility during installation, easy operation and low maintenance cost. The project is according to IEC34 standards, which guarantees higher energy savings. The following types of W21 motors are available Standard Efficiency (EFF2), Premium Efficiency (EFF1) and Top Premium Efficiency (Exceeds EFF1) and suitable for the use with Frequency Inverters.


Motor Features

  • Output: 0.12 up to 330 kW
  • Frames: 63 up to 355M/L
  • Voltage: 220-240/380-415V (up to 100L) / 380-415/660V (from 112M and up)
  • Class “F” insulation (ΔT = 80K)
  • Continuous duty: S1
  • Design N
  • Ambient temperature: 40 °C, at 1000 m.a.s.l
  • Squirrel cage rotor/Aluminium die cast
  • V’Ring on both endshields
  • Stainless steel nameplate AISI 316
  • Dimensions according to IEC-72
  • Performance characteristics according to IEC 34
  • Regreasing nipple from frame 225S/M and above
  • Metric threaded cable entries on the terminal box
  • Thermistors (1 per phase) fitted in frame 160M and above
  • Suitable for inverter duty applications
  • Color: RAL 5009



Pumps, fans, crusher, conveyors, machine tools, milling machines, centrifugal machines, presses, elevators, looms, grinders, woodworking, cooling, packaging equipment, other severe duty application.


Optional Available

  • Degree of Protection: IP56, IP65 or IP66
  • Bearing seals:
    • Lip seal
    • Oil seal
    • Labyrinth taconite seal and W3seal for frames 90S and above
  • Thermal protection:
  • Thermistors: frame 132M and below
    • Thermostats
    • RTD-PT 100
    • Space heaters
  • Design H
  • Class “H” insulation
  • Roller bearings for frame 160M and above