Motor Information

 
Superior protection measures ensure double reliability
The motor of any pump is as vital for operation as the pump itself. This is precisely the reason why Grundfos offers a large range of highly efficient and technically advanced motors. Each motor is perfectly adapted to the individual pump design in order to achieve optimal balance between performance, efficiency, and long-time running costs of the pump.
The table below provides an overview of the motor variants and designs that Grundfos offers for custom-built pumps. The list should not be regarded as complete. A multitude of special designs and motor features can be made available upon request.
If our standard solutions do not meet your needs we can create a customized solution based on your specifications. Please contact your local Grundfos company with full details of your requirements.


 

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VARIANT DESCRIPTION
AVAILABLE FOR MODELS
Different motor brand




 		 If technically possible, Grundfos can fit the pump with a motor of a brand other than the standard. This will normally increase the time of delivery. Alternatively, the pump can be supplied without a motor.
0 -60 HP
Different position of motor

 		 Where possible, the terminal box can be placed on either side of the pump.
0 -60 HP
Explosion-proof motor

 		 For operation in hazardous atmospheres.
1 - 30 HP
4 - Pole motors For areas where a lower noise level is required and applications with poor inlet conditions (low NPSHa)
Different enclosure class





 		 As standard, Grundfos can supply:
  • TEFC: Totally enclosed fan-cooled
    On request,we can supply:
    • Chemical processing/mill and chem duty
    • Washdown duty (Up through 10 hp only)
    • ODP: Open drip-proof
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Anti-condensation heating (space heaters)

 		 Built-in heating unit, especially for humid environments. All heating units are supplied with 1 x 115V,60Hz.
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Integrated variable
speed drive

 		 All Grundfos CR pumps below 15 HP are available as standard with an integrated variable
speed drive (type MLE) motor.
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Special supply voltage

 		 Motors suitable for other voltages are
available upon request.
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Motor insulation class.

 		 Upgrade from Class F to Class H.
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Efficiency class

 
  • EPAct/NRC motor efficiency according to EPAct/NRC standards
  • Premium efficiency
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Efficiency class 1 motor Motors with efficiency classification 1 (according to CEMEP, Eff 1) are available.
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Oversized motor

 		 Ambient temperatures above 104° F or installation at altitudes of more than 3,300 feet above sea level require the use of an oversized motor (i.e. derating).
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Tropicalized windings

 		 Motors recommended or operating in
areas with high humidity.
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Wye/Delta starting

 		 Motor wired or Wye/Delta starting
(6 leads).
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Test sheets Grundfos’ laboratory is authorized to
issue test sheets for motors; for
instance, for insurance companies.
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