Product Overview

Product description
SEG
8
18
Operating conditions
The pumps are designed for intermittent operation
(S3). When completely submerged, the pumps can
also operate continuously (S1).
Fig. 9 Operation levels
• S3, intermittent operation:
S3 operation is a series of identical duty cycles (TC)
each with a constant load for a period, followed by a
rest period. Thermal equilibrium is not reached
during the cycle. See fig. 10.
Fig. 10 S3 operation
• S1, continuous operation:
In this operating mode, the pump can operate
continuously without having to be stopped for
cooling. See fig. 11. Being completely submerged,
the pump is sufficiently cooled by the surrounding
liquid. See fig. 9.
Fig. 11 S1 operation
Pumped liquids
pH value: 4-10.
Liquid temperature: 32-104 °F (0-40 °C).
When pumping liquids with a density and/or a
kinematic viscosity higher than that of water, use
motors with correspondingly higher outputs.
For short periods (maximum 3 minutes), temperatures
up to 140 °F (60 °C) are permissible (non-Ex versions
only).
Sound pressure level
The sound pressure level of the pump is lower than the
limiting values stated in the EC Machinery Directive
(2006/42/EC).
Motor range
Variable frequency drive operation
In principle, all three-phase pumps can be connected
to a variable frequency drive.
However, variable frequency drive operation will often
expose the motor insulation system to a heavier load
and cause the motor to be more noisy than usual due
to eddy currents caused by voltage peaks.
In addition, large motors driven via a variable
frequency drive will be loaded by bearing currents.
For more information, see the installation and
operating instructions for the relevant variable
frequency drive at www.grundfos.com (Grundfos
Product Center).
TM06 5749 0116TM04 4527 1509
TM04 5228 1509
S1
S3
Operation
Stop
TC
P
t
Output power
[hp (kW)]
Number of poles
2.0 (1.5) 2
3.0 (2.6) 2
4.0 (3.1) 2
5.5 (4.0) 2