Plant Power Requirements
Plant Power Requirements
(OP)
I have a conveyor system that I am installing. I only have available 30amps @ 480 VAC. How should I size an additional buck/boost transformer? If I add up all the motor FLA's I am at about 50 amps, however they may not all run at the same time. With all the motors running will I draw the theoritical 50 amps? What is a realistic number that I need to provide? I am trying to prevent costly upgrades and materials.





RE: Plant Power Requirements
RE: Plant Power Requirements
if not continuous article 430.22(e)
I have been in mhe industry for >10 years, I have always rated the panel with multiple motors*1.25. I do not think you can not get away with a 60 amp feed. You stated above motors maybe on continously.
RE: Plant Power Requirements
I will say that I have seen the most absurdly sized motors on conveyors, both under and over sized. I guess it is due to the inability to either calculate the friction or allow for lack of maintenance.
RE: Plant Power Requirements
Sorry for the confusion. I have 230 VAC available. The transformer gets me to the required 480 VAC. My current transformer is only a 30 kva transformer and I do not think this will be sufficient for this system. As far as the motor sizing I agree with you however in this case I believe the motors are sized appropiately. Thanks.
RE: Plant Power Requirements
RE: Plant Power Requirements
RE: Plant Power Requirements
yes and customers always want to load up or overload product on conveyors.
worst I saw was pallet conveyor where they were always putting 2000# pallets on all the time. it had these air bag accumulation conveyor next to a tcar. the programming fixes I had to put just to make rate. makes my teeth grind remembering that experience.