Jollygrn74
Plastic
- Joined
- Nov 1, 2017
So a friend gave me a project that is pushing the limits of my personal experience, leaving me somewhat unsure of best solution. I was give a diagram including 3 motors and later one including showing a possible 6. I believe that the fellow sending these document is somewhat confused. Now the two main ones are 1- designated Main Motor @7.5kW 400V and another being labelled Hydraulic pump @5.5kW with a servo motor, cooling motor, a conveyor motor and another "forming" motor on an encoder. Only the two show sizing on these schematics. The unit itself is is to bend up roofing metal into preset panels. He wishes to setup this unit in his personal garage that has a 100A 120V/240V household panel.
It may confuse with so many things but I am going to start with the initial 2 sized motors with the premise that the other motor well not be significant as was essentially told to me to start.
In sizing a RFC I boil it down to requiring a 15HP sized unit as no loads would start at the same time and the loading is assumed to be medium. In looking for possible used units I found one that doesn't look bad only in local area but it is a 20HP system which I know if it can work is in a way better as less wouldn't be working it as hard as a smaller. The issue is that there is only a 100A service supply (which will just do a 15HP system) and the 20HP is showing 134A input. First, can I soft start the phase converter to reduce initial loading? Now if I am only using a the shown load that will not cause a large draw, is it ok to use it on the undersized service? Obviously I would size disconnect to prevent overload to main.
Thanks
It may confuse with so many things but I am going to start with the initial 2 sized motors with the premise that the other motor well not be significant as was essentially told to me to start.
In sizing a RFC I boil it down to requiring a 15HP sized unit as no loads would start at the same time and the loading is assumed to be medium. In looking for possible used units I found one that doesn't look bad only in local area but it is a 20HP system which I know if it can work is in a way better as less wouldn't be working it as hard as a smaller. The issue is that there is only a 100A service supply (which will just do a 15HP system) and the 20HP is showing 134A input. First, can I soft start the phase converter to reduce initial loading? Now if I am only using a the shown load that will not cause a large draw, is it ok to use it on the undersized service? Obviously I would size disconnect to prevent overload to main.
Thanks