Eaton 9395XC, Installation And Operation Manual

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Eaton 9395XC UPS 1200kW/1200kVA, 1350kW/1350kVA or 1500kW/1500kVA 164001079—Rev 01 83
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The Eaton Power Xpert 9395XC 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 output
and 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 45 shows the main elements
of the UPS system.
If utility power is interrupted or falls outside the parameters specified in Chapter 10 Product Specifications the
UPS uses a backup battery supply to maintain power to the critical load for a specified period of time or until the
utility power returns. For extended power outages, the UPS system allows you to either transfer to an
alternative power system (such as a generator) or shut down your critical load in an orderly manner.
Figure 45. Main Elements of the UPS System
Battery
Battery
Breaker
Battery
Converter
Input
Contactor
K1
AC Input to
Rectifier/
Charger
AC Input to
Bypass
Power Module
Inverter Rectifier
Digital
Metering
Static
Switch
AC Output
to Critical
Load
UPS Cabinet
Battery System
The emergency bypass consists of a continuous static switch. The bypass breaker (if installed) is located in
parallel with the static switch. The static switch is armed and ready during normal operation.
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A single UPS operates independently to support an applied load from the inverter, providing conditioned and
uninterruptible AC power to the critical load from the output of the module. During an outage, the inverter
continues to operate, supporting power to the load from the battery supply. If the unit requires service, applied
loads are transferred to the internal bypass either automatically or manually. With the exception of a battery