Grundfos E-pumps

Grundfos E-pumps
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1. Introduction to E-pumps
General introduction
This product guide deals with Grundfos pumps fitted
with Grundfos MLE motors, 1/2 to 30 Hp
(0.37 - 22 kW). These motors are standard
asynchronous motors with integrated variable
frequency drive (VFD) and controller. In some cases,
the pumps have a factory-fitted sensor.
These pumps are referred to as E-pumps.
For information about E-pumps with a higher shaft
power output, see our CUE range of VFDs,
30 to 300 Hp (22-250 kW).
In new installations, the E-pumps provide a number of
advantages. The integrated variable frequency drive
has a built-in motor protection function which protects
both motor and electronics against overload. This
means that E-pump installations do not require a motor
starter, but only a normal short-circuit protection for the
cable.
Setpoint
PI
controller Controller
Introduction to E-pumps
Variable Freq.
frequency
conv.
drive
M
Fig. 2
Components of a Grundfos E-pump
TM05 2979 0812
TM03 0431 5104
Fig. 1
Grundfos E-pumps
An E-pump is not just a pump, but a system which is
able to solve application problems or save energy in
a variety of pump installations. All that is required, is
the power supply connection and the fitting of the
E-pump in the pipe system, and the pump is ready for
operation.
The pump has been tested and pre-configured from
the factory. The operator only has to specify the
desired setpoint (pressure) and the system is
operational.
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