Deltas are common for industrial and or for services with mostly motor loads, I don't believe you will get a 230 volt as that is not a common supply voltage, as it is a NEMA motor rating for a 240 volt supply similar to a 200 volt rated motor for a 208 volt supply, or a 460 motor for a 480 volt supply.
Many services I use for lift stations are an ungrounded delta (240v/480v) with monitoring so that two faults to ground have to happen before any OCPD opens, this is to keep the equipment running until a safe shut down can be done to repair the fault, when one phase goes to ground it only creates a corner grounded delta so it is still safe as there is no reference to ground until this happens.
There is also a 4 wire delta that Augie mentioned, that many call a high leg delta with a center tap between A and C phase that gives you a limited source for 120 volt loads off a delta, these have been discontinued in most areas and are no longer offered because it will give you 208 volts from B phase to the neutral but A and C to the neutral will give you 120 volts, most utilities don't like them because they are so unbalanced.
I think Bob (Iwire) has a NEMA chart he has posted in the past, that shows motor voltage ratings versus supply voltages that might help you understand the difference, I'll see if I can find it.
Supply voltage are listed in the left Coulomb and Motor ratings are in the motor Coulomb
