Grundfos Motor Protection and Control

Grundfos SA-SPM Control Boxes

SA-SPM control boxes are used as starting units for single-phase, 3-wire motors, types MS 402B and MS 4000. A control box is required when purchasing a single-phase SP pump.

  • SA-SPM 2 is used for single-phase MS 402B motors with a power input lower than or equal to 0.75 kW
  • SA-SPM 3 is used for single-phase MS 402B and MS 4000 motors with a power input higher than or equal to 1.1 kW. The SA-SPM 3 incorporates a motor-protective circuit breaker and thus protects the motor against over load.
Click here to view Grundfos SA-SPM product range and prices

Grundfos Pressure Manager

The Grundfos PM 1 and PM 2 Pressure Managers are designed for automatic start/stop control of Grundfos pumps and other water supply pumps.

The PM 1 and PM 2 have a user-friendly interface with LED indicators showing:

  • power on
  • pump running
  • alarm indication
  • pressure indication (PM 2)

The PM 1 and PM 2 can be freely positioned in the installation- vertically, horizontally, or at an angle. This makes it easier to install the units in confined spaces and in extensive existing pipework. Due to robust electronics, the PM 1 and PM 2 can be powered by a generator or other alternative power supplies.

Both pressure managers incorporate a number of functions which protect both the pump and the installation.

Protective features:

  • dry-running protection
  • cycling alarm
  • maximum continuous operating time (30 minutes)(PM 2)

The PM 2 has an auto-reset function which can be used to automatically restart the pump.

Click here to view Grundfos PM 1 and PM 2 prices

Grundfos MP204 Motor Protection

A simple yet reliable motor protection unit protects the pump 24 hours a day whilst monitoring energy consumption.

The MP204 protects pump motors against under-voltage, over-voltage and variations in power supply ensuring the pump continues its steady performance. The pump motor will be protected against the overheating which accompanies such variations and reduces pump lifetimes.

Click here to view MP204 price


We are happy to discuss your requirements with you- for expert advice call or email us.

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