Product Manual

SP introduction
SQ, SQE, CU 331, and SP
12
61
Grundfos submersible motors
A complete motor range
Grundfos offers a complete submersible motor range
in different voltages. For an overview of motor types,
sizes and voltages, see page 131.
• MS 402 is designed for the domestic ground water
market and covers outputs.
• The MS 4000 and MS 6000C series are designed
for use in a variety of applications in water supply.
When equipped with features like oversized motor,
temperature measurement, cooling jacket, and
SiC/SiC mechanical shaft seals, these motors are
suitable for heavy-duty industrial applications such
as dewatering operations.
As a standard, all external surfaces of the Grundfos
MS motors in contact with water are made of AISI 304
stainless steel. For aggressive water, such as
seawater or brackish water, R versions made of AISI
904L are available.
Grundfos rewindable MMS motor range
Grundfos MMS motors are suitable for any
submersible installation, including heavy-duty
industrial applications and dewatering operations
(when equipped with temperature control, oversized
motor, cooling jacket, and SiC/SiC mechanical shaft
seals).
As standard the MMS motors are supplied with black
cast-iron end-bells. Optionally, the range is available in
all-stainless steel AISI 316 or AISI 904L versions.
The 2-pole Grundfos MMS submersible motors are all
easy to rewind. The windings of the stator are made of
a special waterproof wire of pure electrolytic copper
sheathed with special non-hydroscopic thermoplastic
material. The fine dielectric properties of this material
allow direct contact between the windings and the
liquid for efficient cooling of the windings.
Fig. 57 Grundfos MS motors
Fig. 58 Grundfos MMS motors
Industrial submersible motors and MS 6000C T60
versions
For heavy-duty applications Grundfos offers a
complete motor range of industrial motors with up to 5
% higher efficiency than that of Grundfos' standard
motors.
The cooling of the motor is very efficient due to the
large motor surface. The efficient cooling makes it
possible to increase the liquid temperature to 140 °F
(60 °C) at a minimum flow of 0.49 fps (0.15 m/s) past
the motor.
The industrial motors are for customers who value low
operating costs and long life higher than price.
Grundfos industrial motors are developed for difficult
operating conditions. These motors will stand a higher
thermal load than standard motors and thus have a
longer life when subjected to high load. This applies
whether the high load is caused by bad power supply,
hot water, bad cooling conditions, high pump load etc.
Please note that heavy duty motors are longer than
motors for standard conditions.
TM00 7305 1096 - GrA4011 - GrA4013
TM03 3478 0406