At our school they are going to start a machine shop. There is going to be around 15 pieces of equipment. It looks like the largest motors are 3 hp and are 230/460 volt three phase. The motors draw 8 amps at 230 volts. The voltage available is 208 three phase. I know that motors are typically designed to run off of plus or minus 10%. I am wondering if several of these pieces of equipment are running at the same time if you think that it would cause a significant amount of voltage drop to cause issues with the equipment. I am not worried about the length of the conductors. I can guess as well as anyone so I prefer comments from people that may have experience with this and whether it will cause any issues.
Machine Shop
- Thread starter CONDUIT
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- Location
- Massachusetts
If the circuits, feeders and service are all up to at least NEC requirements there should be no issue at all.
cadpoint
Senior Member
- Location
- Durham, NC
- Occupation
- Electrician - but not by NC Law.
Won't this little machine voltage rate difference effect calculated material removal rates?
Fulthrotl
~Autocorrect is My Worst Enema.~
- Occupation
- E
shouldn't. it'll draw some more current obviously, but the synchronous speed should be the same, yes?
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
Synchronous speed, yes.
It might also affect the slip versus torque curve, but not enough to even be noticeable. A second order effect at worst.
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