Project Description

AFA 25-105
Ring electrode system

AFA 25-105 series liquid resistance starters are based on the original 1917 design produced by BEA. Their production and further development was taken up by MKS in 2001. These liquid resistance starters incorporate the classic BEA ring electrode system.
MKS liquid resistance starters stand out for their high current rating and power range. They have a high resistance ratio and a very low final resistance at their minimal electrolyte concentration.
These liquid resistance starters are rated from 2,000 to 20,000kW. The excellent characteristics of these liquid resistance starters for the starting of slip ring motors can be employed in nearly all drive systems where high levels of starting torque are required and/or where poor network conditions are present. They are often used for the starting of mills, ventilators, pumps and crushers but also in more unusual applications, such as in sugar mills.

  • Automatic / manual operation
  • Level monitoring
  • Füllstandsüberwachung elektronisch
  • 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
  • High speed servo controller
  • Brush lifting device
  • Brush arc monitoring
  • Rotor blocking monitoring
  • Torque control
  • Speed control
  • Agitator
  • Circulation pump
  • Integrated cooling system rated up to 1,200 kW
  • Analogue 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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