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MX Series

Subteck submersible motor is a three-phase asynchronous motor with a short circuit rotor. It is designed as a wet-running motor with a watertight insulated winding. All motors are rewindable. 8’’ motor connection is according to NEMA standard.

The bearings are lubricated by the motor filling. That is a mixture of glycerine and water. Glycerine is biodegradable and secures the anti freeze protection up to -25 °C. If necessary, it can be changed with pure drinking water.

Axial down thrusts is absorbed by the axial thrust bearing with individual tilting pads. Motors are encapsulated by a high quality mechanical seal. A reliable balance system grants the pressure compensation between motor and its environment.

The motors are completed with pressure-water tide cable. They are inside-earthed. Construction complies with VDE-regulations and the motors are conform to the EC declaration of conformity as defined by machinery directive 2006/42/EEC.

Motors are usable in horizontal and diagonal position depending of the nominal power, they are working electrical clock- and anticlockwise.

A high efficiency guarantees lowest operating costs.

For all the motors Subteck holds a detailed supply of control and monitoring equipment.

  • Power132 kW
  • Voltage1000 V
  • Currency3 Phase
  • Frequency60 Hz
  • Speed3460 rpm


Operating data

  • Nominal power: up to 132 kW
  • Voltage: up to 1000 V
  • Kind of currency: 3 ~
  • Frequency: 50 Hz and 60 Hz
  • Degree of protection: IP 68
  • Ambient temperature: up to 30°C (50°C with XLPE/PA-wire, higher temperatures on request)
  • Switching frequency: max. 20/h
  • Nominal speed: 2850 rpm and 3460 rpm

Special design (on request)

  • Higher temperatures
  • Other quality of pumped liquid, for example sea water use
  • Chemically polluted liquids
  • Other materials
  • Suction jacket
  • Temperature monitoring with PTC / PT100 including reporting device
  • Microprocessor controlled motor monitoring

Frequency transformer operation

Every Subteck motor is usable for frequency transformer operations. Following recommendations should be considered:

  • The frequency transformer must be conform to the nominal currency of the submersible motor;
  • The maximal working range from 30 Hz up to 60 Hz, corresponding speed from 1.740 up to 3.460 1/min;
  • The using of a sine-wave generator protects against high voltage peaks;
  • The minimum rate of flow must be 10% of the nominal rate of flow of the pump.

Soft starter operation

Soft starters are very qualified to start a submersible motor. They grant:

  • reducing of starting current;
  • avoidance of water hammer while starting causing switch-off of the pump.



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