Im working on a Gelato Shop where the owner provided me with some cutsheets for the equipment and had a rep from the manufacturer convert the loads to Amps @ 208/3/60htz. The equipment is Italian.
According to the cutsheet, this particular piece of equipment is 4.5 kW @ 400v/3/50 htz (no amps listed). Someone from the manufacturer marked on the PDF that this machine uses 29 Amps @ 208/3 which is about 11 kW . Does this make any sense? What would you use for your load calcs? 4.5 kW, or 11kW? The company is located in Italy so I doubt that I can get very far with a phone call.
I would upload the cutsheet but I dont there is an option to on here.
You can take a screen shot of the cutsheet, save it as an image (like a .jpeg) and post the image.
I just love (sarcastically) these people who insist that American companies can't make anything as good as EU companies for some of this stuff, then leave it to electricians here to try to figure out all of the electrical incompatibility issues...
4.5kW is roughly 6HP and IEC motors match up fairly closely to NEMA motor sizes, so I doubt that is a single motor. Most likely on a gelato machine the load is a refrigeration compressor and another motor for stirring or something. I'd venture to guess it's a 3.7kW (5HP) compressor and a .75kW (1HP) stirring motor, those are both standard IEC motor sizes, then there is likely some control circuit load to add up to 4.5kW.
29A would cross over to a little less than 10HP (7.5kW) at 208V, I don't know how you got to 11kW. The thing is, when you start off with a 50Hz motor and run it at 60Hz, the kW value actually increases by 6/5 because of the speed difference (assuming no VFDs). That still doesn't account for the whole amount, but there may be other factors involved too, especially if the compressor they are using is centrifugal, because the extra speed will equate to a lot more load.
You should not be left to guess at anything in regards to the electrical connections, because ultimately you are responsible for it. I think you need to have them certify that this machine can operate on US 60Hz power and tell them to give you the REQUIRED information on what it needs to be connected here. Maybe if more people held these EU equipment dealer's feet to the fire they would start to think about it in advance.
