LOHER Motors

The LOHER VARIO Ex d(e) series has a welded steel enclosure for the highest degree of variability and versatility. Flange rings at the ends of the enclosure increase the torsional stiffness and ensure a vibration-proof mechanical design. The steel version allows various bearing concepts, dimensions can be adapted and a wide range of instruments can be mounted.

The surface cooling using flat ribs combined with a defined inner cooling circuit with shaft-mounted fan inside the motor ensure optimum motor utilization. The copper bar rotors used as standard allow starting and operating parameters to be optimized for each and every application. With power ratings up to 3150 kW, these motors are mainly used for conveying, transporting and compressing. The rugged version allows safe, reliable and straightforward operation in Zone 1 both for line and converter operation.

Customer benefits

  • Complies with almost all of the user requirements and specifications (no deviation philosophy)
  • Engineered based on international standards (ATEX, NEPSI, GOST-R, CCOE certified)
  • High level of acceptance in the various sectors. For instance, Shell and DOW recommend these motors
  • Complete project documentation guarantees minimum planning costs
  • High degree of cost effectiveness and low operating costs as a result of the optimum electrical and mechanical values
  • High degree of variability and versatility using a welded steel enclosure (to adapt the dimensions, mounted components)
Name LOHER Motors
Models DH.. / MLFB: 1PS4, 1PS5
Shaft heights 355, 400, 450, 500, 560, 630
Power range 80 kW - 3150 kW
Number of poles 2 - 16 poles, higher pole numbers on request
Voltage range 3000 V - 11000 V
Rated voltage 3.3 kV / 4.16 kV / 6 kV / 6.6 kV / 10 kV / 11 kV
Degree of protection IP55, IP56, IP65, IP67, IP68
Cooling type AIR - WATER
Type of construction IM B3, IM B35, IM V1
Enclosure Welded steel
Bearings Roller bearings, sleeve bearings (only for gas group IIB)
Standards IEC, EN, DIN, VDE
Explosion protection II2G Ex d(e) IIB T4, II2G Ex d(e) IIC T4
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