UMA-S: Our high-efficiency submersible motor for submersible borehole pumps

Once installed, submersible borehole pumps are characterised by their durability and wear resistance. Consequentially, energy costs make up 90 % of the entire life cycle costs. This is where huge savings can be made with the UMA-S synchronous motor, thus increasing the overall efficiency of your installation.

The UMA-S synchronous motor – For highest efficiency and low life cycle costs UMA-S submersible motor for submersible borehole pumps in water extraction

Minimising energy costs with UMA-S

With KSB’s UMA-S synchronous submersible motor you not only provide your submersible borehole pump with a powerful and reliable partner for all fluids and operating conditions. You will also be operating your submersible borehole pump more efficiently than ever before – continuously, for decades. Because the submersible motor keeps the energy and operating costs to a minimum and helps achieve top results.

Extremely powerful, highly economical: That’s the UMA-S submersible motor

The submersible motors’ efficiency advantages over common asynchronous motors, even at fixed speed, equal a minimum of twelve percent – at full compatibility. Combined with an integrated speed control system you can even save up to 40 percent in energy costs, thanks to the optimised operating mode.
This graphic shows a comparison between the UMA-S permanent-magnet synchronous motor and a common asynchronous squirrel-cage motor at full speed.

UMA-S submersible motor – Energy efficiency for submersible borehole pumps UMA-S submersible motor – Comparison of efficiency classes


UMA-S is available in several ratings for 6" – 8" submersible borehole pumps. The submersible motor covers the complete range from 4.5 to 150 kW.

Find out how much it can save you.
Start your calculation. 

Operate your submersible borehole pump more efficiently than ever before! With UMA-S.

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Contact your KSB partner!

We will be happy to provide information on our portfolio and answer any questions you may have.

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Water extraction & groundwater management

Well pump measurement by KSB

Submersible borehole pump efficiency is a crucial factor in groundwater pumping: Poor efficiency causes high energy costs. KSB uses special well pump measurements to analyse pump performance.

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