Understanding Ups Operation; Ups System Overview; Single Ups - Eaton 93E Installation And Operation Manual

6

Understanding UPS operation

6.1
The Eaton 93E UPS is a continuous-duty, solid-state, 3-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 33 and Figure 34 shows
the main elements of the UPS system.
If utility power is interrupted or falls outside the parameters specified in
Chapter 10, 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 allows you to either
transfer to an alternative power system (such as a generator) or shut
down your critical load in an orderly manner.
The emergency bypass consists of a continuous duty static switch and a
backfeed protection contactor. The backfeed protection contactor is
located in series with the static switch. The static switch is armed and
ready during normal operation.
6.2
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 an optional external battery cabinet, no other cabinets or
equipment are required for the single UPS to successfully support its
applied loads.
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Eaton 93E UPS 15-80 kVA (380/400/415 V)

UPS system overview

Single UPS

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Document ID: 614-01975-00
Installation and Operation Manual
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