Eaton 93PM-L 20 – 60 kW (208V) UPS Installation and Operation Manual P-164000711—Rev 03
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The Eaton 93PM-L UPS is a continuous-duty, solid-state, transformerless, 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.
shows the main elements
of the UPS system.
If utility power is interrupted or falls outside the parameters specified in
Chapter 9
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 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. The static switch is armed and ready during
normal operation.
!
IMPORTANT
In case of customer installed bypass breaker, the shunt trip and auxiliary should be connected to the static
switch. The shunt trip voltage provided by the UPS is 48V DC.
This unit is a four-wire device. The loss of a single input phase or the loss of neutral with unbalanced four-wire
loads will be considered a complete loss of input power and discharge the battery to provide power to the load.
Figure 49. Main Elements of the UPS System
Battery
[Internal Battery (if applicable)
and/or External Battery Cabinet]
UPS
Battery
Switchgear
Inverter
Switchgear
Power Module
Rectifier
Switchgear
AC Input to
Rectifier/
Charger
AC Input to
Bypass
AC Output
to Critical
Load
Digital
Metering
Static
Switch
Battery
Converter
Summary of Contents for 93PM-L Series
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