Welcome to ModelEngineMaker !If you have problems registering or logging in, please use the contact menu option to request assistance.
Time to put the workshop back together. I still have not worked out why the 3HP Colchester takes less current than the 2HP Harrison under no load . Jo
Thanks Tony I was more intregued that the larger motor was in no load condition taking less amps. I also noted that the new 3HP Colchester motor needs a lower boost setting on the 3 phase converter than the old one used to .Jo
Quote from: Jo on November 16, 2013, 03:29:54 PM Time to put the workshop back together. I still have not worked out why the 3HP Colchester takes less current than the 2HP Harrison under no load . JoA motor like that draws the most current when starting. As the motor speeds up it generates back EMF that reduces the apparent current required to run the motor. When the forces hit balance the motor stops accelerating and runs at a steady speed. When you put it under load you will see the current increase.Tony
Don, She is a dual voltage rating so she could be wired in star or delta. I have left it as star as that was the way the original motor was wired and how the Colchester Manual shows.I am very pleased that I have got everything up and running again I just hate to think what that new Colchester motor would have cost if I had not already had a spare (maybe I will give my ex one brownie point for acquiring it ) . Jo