I can tell you that in larger installations when a is being VFD being used to convert to three phase service in continuous usage that the recommendation is to double the hp rating of the VFD to the HP of the motor. It’s a safe rule of thumb to go by, but those were also in 20 hp and larger installations.Agreed,
Agreed, when I was ordering a 30HP drive, Danfoss suggested I double the size, not so much because it was undersized but because the load 10 3Hp motors produced on startup would 1.5 times the regular load.
