M Series High Voltage Motors

M-Series: A new range of high voltage, high efficiency TEFC cage induction motors. The range covers 125kW to 1500kW, 50Hz (200 to 1800kW, 60Hz) in frame sizes 355,400, 450 and 500 and supply voltages 3.3kV to 13.8kV, 50 or 60Hz. Available with standard designs for 2 to 8 pole, the M-Series in either horizontal or vertical mounting configurations with standard IP code of IP56.

The robust construction includes cast iron frames and endshields with form-wound stator coils and copper or copper alloy rotor cage providing a design life of 20 years.

Use of Laurence Scott & Electromotors NORFAST insulation system, providing high thermal conductivity combined with low loss shaft mounted external fan and a novel back of core internal air circuit delivering high effective cooling, prolonging in-service running hours.

Lead-time for machines has been reduced through a deliberate rationalisation of production methods and component procurement, while still retaining the flexibility to offer application-specific motors.

  Standard Option
Type Cage Induction
Frame Sizes 355 to 500
Output 125 - 1500kW @ 4-pole speed  
Voltage 3300, 4160, 6600 Other voltages to 13.8kV
Mounting Horizontal or Vertical
Frequency 50Hz or 60Hz Variable Frequency Supply
Poles 2 to 8 Others, Multiple-pole
Cooling Air Cooled, TEFC, IC4A1A1
Ingress Protection IP56
Mounting (EN 60034-7) IM2001 - Horizontal Foot, IM3011 - Vertical Flange IM2001 - Horz. Foot and Flange, IM3811 - Vertical Skirt
Temperature Rise Class B Class F
Duty S1 Others
Insulation Class F, VPI Class H, VPI
Bearings Grease Lubricated, Rolling Element Bearings Oil - Lubricated Sleeve Bearings (std on 500 2-pole)
Main Terminal Box Air Insulated for fused supplies Phase Insulated, Phase Segregated, BEAMA/CEGB, Elastomeric termination
Ambient Temperature -20OC to +40OC -50OC to +60OC
Starting Design N Design D, Low Starting Current, High Starting Torque
Starting Method DOL Others
Noise Level, Mean Sound Pressure Level, @ 1m, No Load 2-pole: 81 dB(A) , 4-pole and up: 80 dB(A), (60Hz +3dB) Refer to manufacturer for lower noise level.
Vibrations Grade R to EN60034.14 API 541 Ed 3
Standards EN60034-1, IEC 72: Pt 2 NEMA MG1, Customer Specific
Area Classification Safe Area EEx n to EN50014/21, EEx e to EN50014/19, EEx p to En50014/16