Voltage
[V]
Typical shaft power
P2
[kW (hp)]
RFI filter type
1 x 200-240
1.1 - 7.5
(1.5 - 10)
C1
3 x 200-240
0.75 - 45
(1 - 60)
C1
3 x 380-500
0.55 - 90
(0.75 - 125)
C1
3 x 380-500
110 - 250
(150 - 350)
C3
3 x 525-600
0.75 - 90
(1 - 125)
C3
3 x 525-690
11 - 250
(15 - 350)
C3
*
Single-phase input - three-phase output.
Description of RFI filter types
C1:
For use in domestic areas.
C3:
For use in industrial areas with own low-voltage
transformer.
RFI filter types are according to EN 61800-3.
Equipment of category C3
•
This type of power drive system (PDS) is not intended to be
used on a low-voltage public network which supplies domestic
premises.
Radio frequency interference is expected if used on such a network.
Related information
6.3.1 Output filters
Output filters are used for reducing the voltage stress on the motor
windings and the stress on the motor insulation system as well as
for decreasing acoustic noise from the frequency-converter-driven
motor.
Two types of output filters are available as accessories for CUE:
•
dU/dt filters
•
sine-wave filters.
Use of output filters
The table below shows when we recommend an output filter and
the type to use. The selection depends on the following:
•
pump type
•
motor cable length
•
the required reduction of the acoustic noise from the motor.
Pump type
dU/dt filter
Sine-wave filter
SP, BM, BMB with
motor voltage from
380 V and up
-
0-300 m
Pumps with
Grundfos motor
MG71 and MG80 up
to and including 1.5
kW (2 hp)
-
0-300 m
Applications with
desired reduction of
dU/dt and noise
emission, low
reduction
0-150 m
-
Applications with
desired reduction of
dU/dt, voltage peaks
and noise emission,
high reduction
-
0-300 m
Pump type
dU/dt filter
Sine-wave filter
Applications with
motors of 500 V and
up
-
0-300 m
*
The lengths stated apply to the motor cable.
6.4 Motor cable
To meet the requirements of EN 61800-3, the motor cable
must always be a screened cable whether an output filter
is installed or not.
The mains cable does not need to be a screened cable.
See the figures below.
1
4
TM044289
Example of installation without filter
1
2
4
TM044290
Example of installation with filter. The cable between CUE
and filter must be short.
1
2
5
TM044291
Submersible pump without connection box. Frequency converter
and filter installed close to the well.
1
3
2
5
TM044292
Submersible pump with connection box and screened cable.
Frequency converter and filter installed far away from the
well, and connection box installed close to the well.
Symbol Designation
1
CUE
2
Filter
3
Connection box
4
Standard motor
5
Submersible motor
One line Unscreened cable
Double
line
Screened cable
6.5 Mains and motor connection
Check that the mains voltage and frequency correspond
to the values on the nameplate of CUE and the motor.
The motor cable must be screened for CUE to meet EMC
requirements.
The supply voltage and frequency are marked on the CUE
nameplate. Make sure that CUE is suitable for the power supply of
the installation site.
10
English (GB)
