Eaton 93PM Series Three Phase Online Tower UPS Model 50/50kW (50kW Frame 1 UPM) Singlel Feed, 4W + Gnd, 50/60Hz 480Y/277V In/Out 4 Internal Strings for 7.9 minute runtime at full load ESS - Energy Saver System PXGMS & EMP Empty Sidecar Top Air Exhaust DC