Covering 60–85 MVA power range at voltages from 3–15 kV, 1400 frame size 4-pole synchronous generators enable high unit powers and economical genset designs. Operation below critical vibration speed area promotes reliability in start-stop mode. Size, weight, efficiency, inertia, and facilitated maintenance enable OEMs to use 4-pole technology in higher power gensets as well as increase power in hot environments where de-rating is needed.