Need advice with electrical supply to building 480 to 208

[tcastagna06]

Im opening my second salon and need some advice badly. The building currently has a 480/277v 3 phase panel to a step down transformer to 208/120 125a panel. Only thing on the 480 panel is ac and secondary panel.

Im running 10 beds in this salon with 6 of them low beds 30amp 3 of them 50 and one at 90amp. Only the one 50amp and the 90amp bed are set up for 3 phase. All other beds are single phase.

So what should I do??? Obviously the main panel is of no use but to run the ac and supply a useful panel right?

Do I have to buy a bigger transformer at 112.5 kva or more to support a bigger 208 panel.

Any help would be greatly appreciated.....

[sun2go]

Look into a 480/240v Delta transformer for bed power only. You should be able to run all beds at 240v without the need for buck/boost transformers.

[tcastagna06]

I was thinking about that but 240v as far as I know comes in at 230v+- and that would be too much for the low beds so I would have to buck the power on those. Either way it seems I would need buckboosters????

[Robert K]

Probably not. Most beds should run 230-240V.

[tcastagna06]

Originally Posted by Robert K

Probably not. Most beds should run 230-240V.

That what I think as well but my low beds do say on the bak do not run over 230v. Ive always been one to ignore maunfactors warning as most are always ultra conservative for liability reasons. That was until I opened a tanning salon....

Do you think I still should run them that hot. I would love to have 240 coming into the building for my beds!

[Brian Oshman]

I wouldn't. I would run a 208 transformer and boost beds accordingly. A delta transformer will probably run more like 245v in reality. The red leg restricts options too.

Run a WYE 208 and boost beds as needed.