UNDERSTANDING UPS OPERATIONEaton 9395 UPS (450–825 kVA) Installation and Operation Manual 164201725 Rev 4 www.eaton.com/powerquality6-20Input Breaker(CB1)(optional)X-SlotInterfaceE1, E2, E3 E6, E7,E8, E1248V BatteryShunt TripNOTE Callout letters A, B, C, and D map to Table 3‐4 on page 3-14.NOTE If the load requires a neutral, a bypass source neutral must be provided. If the load does not require a neutral and there is no neutral conductorconnected at the bypass input, a neutral to ground bonding jumper must be installed. DO NOT install both a source neutral and a bonding jumper.UPS CABINETBackfeedContactor (K5)AC Outputto CriticalLoadE9,E10,E11,E12StaticSwitchAC Input toUPS Rectifier3 Wire A-B-CRotationAC Input toBypass3 or 4 Wire A-B-CRotationInterface BoardBattery AuxRemote EPOBuilding AlarmsAlarm RelaysFuseService ConnectorBatteryConverterInverterOutputContactor(K3)FuseRectifierInputContactor(K1)Battery Contactor (K2)FuseFuseFuseUPM 1BatteryBreakerE4. E5BatteryConverterInverterOutputContactor(K3)FuseRectifierInputContactor(K1)Battery Contactor (K2)FuseFuseFuseUPM 2(Not supplied with the UPS)BatteryConverterInverterOutputContactor(K3)FuseRectifierInputContactor(K1)Battery Contactor (K2)FuseFuseFuseUPM 4FI-UPM CABINETBATTERY SYSTEMA BCDSingle-feed Kit(Not suppliedwith the UPS)Figure 6‐15. 825/550 UPS System – Three UPM, Common Rectifier Feed, Common Battery, Dual‐Feed Configuration, Continuous Static Switch
