Varible frequency Drive on Wet rotor Pump

[reymen]

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.

 

[Artisi]

Contact Grundfos - who better to advise you but the manufacturer

 

[thewellguy]

I'm familar with that model number, however I know that Grundfos is putting out their own VFD. Check their web site

http://www.us.grundfos.com

 

[ozmosis]

reymen
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.

 

[thewellguy]

Just courious, I looked in the catalogs that i have and couldn't find that model. What is a UPS-5-_240 used for?

 

[reymen]

Thanks for all the replys. Great Forum.

The ups 50-240 is a wet rotor pump capable of doing 75 gpm @
45 ft head.