Output Filters - Grundfos CUE Series Product Manual

Accessories

Output filters

Grundfos offers two types of output filter as accessories
for the CUE:
• dU/dt filters
• sine-wave filters.
The filters are in IP20/NEMA1 enclosure.
Fig. 62 Wall-mounted sine-wave filters
Use of output filters
The table below explains in which cases an output filter
is required. From the table, it can be seen if a filter is
needed and which type to use.
Typical shaft
Pump type
Up to 7.5 kW
SP, BM, BMB with
380 V motor and up
11 kW and up
Up to 7.5 kW
Other pumps, noise
reduction
11 kW and up
Up to 7.5 kW
Other pumps, higher
noise reduction
11 kW and up
Pumps with 690 V
motor
The lengths stated apply to the motor cable.
For information about installation, see page 34.
56
Sine-wave
dU/dt filter
power P2 filter
0-984 ft
–
(0-300 m)
0-492 ft 492-984 ft
(0-150 m) (150-300 m)
0-984 ft
–
(0-300 m)
0-492 ft 492-984 ft
(0-150 m) (150-300 m)
0-984 ft
–
(0-300 m)
0-984 ft
–
(0-300 m)
0-492 ft 492-984 ft
All
(0-150 m) (150-300 m)
Grundfos CUE