sizing variable frequency drives

[sparky4barleans]

Can anyone tell me how to size a vfd? I'm getting conflicting information from the wholesale houses. I have a 480 volt 40hp motor. Namplate FLA 44 under constant torque application.

 

[Besoeker]

Can anyone tell me how to size a vfd? I'm getting conflicting information from the wholesale houses. I have a 480 volt 40hp motor. Namplate FLA 44 under constant torque application.

VFD rated at motor current or nearest above.

 

[Jraef]

Can anyone tell me how to size a vfd? I'm getting conflicting information from the wholesale houses. I have a 480 volt 40hp motor. Namplate FLA 44 under constant torque application.

You rrally should not cross post.

http://forums.mikeholt.com/showthread.php?t=153848