Varible frequency Drive on Wet rotor Pump
Varible frequency Drive on Wet rotor Pump
(OP)
Hi Everyone
Does anybody have any experience using a VFD Drive on a wet rotor pump like a Grundfos UPS-50-240.Any insight on this would be appreciated.
Does anybody have any experience using a VFD Drive on a wet rotor pump like a Grundfos UPS-50-240.Any insight on this would be appreciated.





RE: Varible frequency Drive on Wet rotor Pump
RE: Varible frequency Drive on Wet rotor Pump
RE: Varible frequency Drive on Wet rotor Pump
Be careful if you are going to fit a VFD onto the Grundfos pump. The insulation class of the motors are typically not suitable for fitting a VFD directly onto the motor without fitting some type of sinusoidal filter between VFD and motor. Basic dv/dt filters are often not always suitable as the voltage stresses still impact the GF pump motor and I think therefore that GF will actually recommend a sinusoidal filter to ensure as close as possible a voltage sinewave.
RE: Varible frequency Drive on Wet rotor Pump
RE: Varible frequency Drive on Wet rotor Pump
The ups 50-240 is a wet rotor pump capable of doing 75 gpm @
45 ft head.