I have a phase converter that ranges from 3 - 7.5 hp. It is currently running a 3 hp jointer. I am in the process of acquiring a 5 hp 3 phase bandsaw. I have a one man shop and do not intend to ever have more than 1 machine on at a time. But for the sake of eliminating any chance of ever having both machines on at the same time and overwhelming the converter, I want to run out of the converter and into a switch that "redirects" the circuit to either machine. This would prevent both machines from being able to turn on at the same time. The switch would not necessarily need an "off" position.
After trying to find such a switch, I came across 3 phase rotary changeover switches, but I am not sure if they will accomplish what I am after.
Does such a switch exist, and what are they called?