SFAK 31-101
High speed servo drive system

The SFAK series of liquid resistance starters covers a power range from 1,500 to 20,000 kW of engine output. They are usually used as liquid resistance starters for metal shredding drive systems due to their highly dynamic control and positioning characteristics. The smooth, spindleless and wear-resistant electrode adjustment enables a high level of positioning accuracy. Due to their wide dynamic range and control precision they are also employed in turbine and compressor test rigs, steel works, in Ilgner converters, or to start and
synchronise the water pumps in hydroelectric energy storage.
The SFAK series is also offered with a slip ring motor, medium voltage switch gear and re-cooling system as part of a complete solution. It goes without saying that the latest motor management system and PLC control via a Profibus or Ethernet interface are included.

  • Automatic / manual operation
  • Level monitoring
  • Rmax und Rmin monitoring
  • Frequency converter
  • Hand crank
  • Gear box limit switch
  • Short-circuit contactor
  • Heater
  • Thermostat for cut-off and control
  • Liquid resistance starters compliant with IP54
  • Control panel at least compliant with IP54
  • Automation through Profibus or Ethernet interface
  • brush lifting
  • Brush fire monitoring
  • Integrated cooling system with a nominal output of up to 1,200 kW
  • Analog electrode position sensor 4-20 mA


Our full service solution for your drive system

We supply the components for your drive system – liquid starters, switchgear and slip resistors, which we tailor to your needs.

1. All from one Hand

From quoting through project planning to delivery, our customers are supported by a contact person who takes over the coordination and execution of the entire project.

2. Individual + specific

With our know-how and our experience, we face all challenges, however special they may be, and always find the ideal solution for your company.

3. Own production

Our liquid starters and medium voltage switchgears are designed, built and tested by our qualified MKS employees in-house in Germany.

4. Best components

All materials and equipment comply with IEC and VDE standards. Other standards can be implemented at the project level.

Cement and Minerals

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