Eaton Power Xpert 9395C Installation And Operation Manual

Eaton Power Xpert 9395C UPS Installation and Operation Manual 164000821—Rev 06 87CChhaapptteerr 66 UUnnddeerrssttaannddiinngg UUPPSS OOppeerraattiioonn66..11 UUPPSS SSyysstteemm OOvveerrvviieewwThe Eaton Power Xpert 9395C-1100 UPS is a continuous-duty, solid-state, transformerless (at 480 Vac), three-phase, true online system that provides conditioned and uninterruptible AC power to the UPS system's outputand critical load.The basic system consists of a rectifier, battery converter, inverter, monitoring/operation control panel,integrated communication server, and digital signal processor (DSP) logic. Figure 53 shows the main elementsof the UPS system.If utility power is interrupted or falls outside the parameters specified in Chapter 10 Product Specifications theUPS uses a backup battery supply to maintain power to the critical load for a specified period of time or until theutility power returns. For extended power outages, the UPS system allows you to either transfer to analternative power system (such as a generator) or shut down your critical load in an orderly manner.Figure 53. Main Elements of the UPS SystemBatteryBatteryBreakerBatteryConverterInputContactorK1AC Input toRectifier/ChargerAC Input toBypassPower ModuleInverterRectifierDigitalMeteringStaticSwitchAC Outputto CriticalLoadUPS CabinetBattery SystemThe emergency bypass consists of a continuous static switch. The bypass breaker (if installed) is located inparallel with the static switch. The static switch is armed and ready during normal operation.66..22 SSiinnggllee UUPPSSA single UPS operates independently to support an applied load from the inverter, providing conditioned anduninterruptible AC power to the critical load from the output of the module. During an outage, the invertercontinues to operate, supporting power to the load from the battery supply. If the unit requires service, appliedloads are transferred to the internal bypass either automatically or manually. With the exception of a battery