Once again into the breech...
Don't install anything yet. Look at EXACTLY what they have first.
It's HIGHLY unlikely that anything from Germany would require 460V, I agree thst it's more likely 400V. But that would be 400V at 50Hz, not 60Hz. We have 60Hz. If you transform down to 400V, the difference in frequency might get you in trouble. AC induction motors that are not run from VFDs will run 20% faster but will produce 20% less running torque and 36% less accelerating torque, resulting in higher slip, more current with less work and a likelihood of burning up. If you just feed them 480V, the V/Hz ratio is exactly the same as 400V / 50Hz and they will deliver full torque, but still run 20% faster. All of that needs to be considered.
In addition, what they would use in Germany is 400Y230V, so any phase to neutral connections, such as might be used in control circuits and aux devices like single phase cooling fans, will be expecting to see 230V, not 277V. So they may need to be separated and fed appropriately.
And then again, if the machine contains power electronics such as VFDs, DC drives, servos and power supplies, they all may not give a rat's butt what you feed them.
So again, investigate fully FIRST. Installing things first and investigating after the smoke escapes is expensive.
