Pump Operation With Mp; Industrial Pumps; Submersible Pumps; Wastewater Pumps - Grundfos MP 204 Instrucciones De Instalación Y Funcionamiento

12. Pump operation with MP 204

DANGER
Cause of fire
Death or serious personal injury
- The product must not be supplied with
pump voltage that exceeds the rating on
the nameplate.

12.1 Industrial pumps

Industrial pumps may incorporate a PTC/thermal
switch to be connected direct to MP 204.
Industrial pumps mainly apply IEC trip classes 20 to
30, depending on the liquid viscosity.
L
1
L
2
L
3
Fig. 19 Submersible pump installation with Tempcon

12.3 Wastewater pumps

Wastewater pumps may incorporate a PTC/thermal
switch to be connected direct to MP 204.
Wastewater pumps may also be connected to a
Pt100/Pt1000 sensor. The sensor can also be
connected direct to MP 204.

12.2 Submersible pumps

Submersible pumps normally have a short startup
time. Trip class "P" can therefore be applied with
advantage for these pumps. It is possible to set very
short times down to for example 900 ms, used for
certain specific applications.
To prevent the Tempcon signal from one submersible
pump from interfering with the signal from another,
cabling must be carefully made to allow
measurements to be made of both pumps at the
same time. The motor cables must be kept apart and
not installed in the same cable tray. To avoid
interference, it may be necessary to fit a filter on the
power cables. See fig. 19.
Fuses
Filter
MP 204
Cables are installed in separate
conduits and cable trays
Tempcon circuit
The Pt100/Pt1000 can be activated with Grundfos
GO Remote. See PC Tool Water Utility.
A high IEC trip class is to be applied for wastewater
pumps, especially grinder-type pumps. Classes 25 to
35 are the optimum choice. Apply IEC trip class 45
for pumping liquids of extremely high viscosity or
liquids containing many solid particles.
MP 204
21