The published Haas DM2 power FLA seems low (17 amps @ 220V) for a 15HP machine. I would expect it to be at least double the published specs.
We're running a Haas TM-2p (7.5HP spindle) on single phase on a 50 amp breaker. It's nameplate FLA is 25 when running on 220V 3 phase, never checked actual load on single phase. This machine is rated for either 3 or single phase.
I think a 100 amp service might be a bit low for a 30 HP machine.