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Motors for Bolivian cement mill at 4000 m above sea level

Menzel Elektromotoren from Berlin, Germany recently delivered two motors for a cement mill and a classifier to a cement plant in Bolivia. The mill, which manufactures high-strength cement with 5000 Blaine, is not only the country's first vertical roller mill for cement grinding. At 4000 meters above sea level it is also the highest installed elevation of an OK mill in the entire Americas. Therefore, very particular technical attention had to be paid to the motors' durability and ruggedness. Menzel modified their maintenance-friendly standard motors designed for the cement industry even further so they would withstand the special operating conditions.

During the planning phase, the drive engineers and the customer closely cooperated in determining the most efficient and economical application design for the drive solutions, eventually deciding on a change of voltage levels, construction of a foundation plate and the installation of a vibration monitoring system for integration into the control as requested by the customer. The German motor manufacturer's flexibility and speed were once more decisive for this customer's placement of an order. After commissioning in September 2016, more than ten motors from Menzel will be powering machines in the Bolivian cement plant.

Technical characteristics squirrel cage motor: 

  • Type: MEBKSL710-06
  • Rated Power: 3,200 kW
  • Voltage: 4,160 V
  • Frequency: 50 Hz
  • Poles: 6
  • Rated Speed: 993 min-1
  • Mounting: IM B3
  • Protection: IP 55
  • Cooling: IC 611
  • Weight: 13,500 kg

Technical characteristics slip ring motor:

  • Type: MEBSSL710-06
  • Rated Power: 3,750 kW
  • Voltage: 6,600 V
  • Frequency: 50 Hz
  • Poles: 6
  • Rated Speed: 991 min-1
  • Mounting: IM B3
  • Protection: IP 55
  • Cooling: IC 611
  • Weight: 17,800 kg
Loading of a MENZEL MEBSSEL710-06 Slip ring motor for Bolivia