Maximum peak voltage and dU/dt for Grundfos submersible motors
Motor series
MS 402
MS 4000
MS6 / MS 6000C
MMS6 / MMS 6000
MMS 8000
MMS 10000
379 V or
greater
incoming
power
Fig. 13
Location of the sine-wave filter in the system
For further details, contact your VFD supplier or
Grundfos.
18
Maximum U
voltage
peak
650 V phase-phase
850 V phase-phase
850 V phase-phase
850 V phase-ground
850 V phase-ground
850 V phase-ground
Sine-wave
VFD
Cable length from VFD to motor
0 to 1500 ft (0 to 457 m)
Maximum dU/dt
2000 V/micro s.
2000 V/micro s.
2000 V/micro s.
500 V/micro s.
500 V/micro s.
500 V/micro s.
Motor
filter