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Chapter 1
Introduction
The Eaton
transformerless, double-conversion, solid-state, three-phase system, providing conditioned and uninterruptible
AC power to protect the customer's load from power failures.
The Eaton 93PM 20–50 kW, Four Wire online power protection system is used to prevent loss of valuable
electronic information, minimize equipment downtime, and minimize the adverse effect on production
equipment due to unexpected power problems.
The Eaton 93PM 20–50 kW, Four Wire UPS continually monitors incoming electrical power and removes the
surges, spikes, sags, and other irregularities that are inherent in commercial utility power. Working with a
building's electrical system, the UPS system supplies clean, consistent power that sensitive electronic
equipment requires for reliable operation. During brownouts, blackouts, and other power interruptions,
batteries provide emergency power to safeguard operation.
The Eaton 93PM 20–50 kW, Four Wire UPS is available with one or two Uninterruptible Power Modules (UPMs)
integrated in one cabinet. Each UPM is rated for a maximum of 50 kW. The system maximum rating is 50 kW.
To deliver greater reliability, UPS with two UPMs can provide N+1 redundancy up to a maximum of 50 kW.
Should one UPM become unavailable or require servicing, the remaining UPM supplies the load instead of
transferring to bypass.
The UPS is housed in a single free-standing cabinet, with safety shields behind the door for hazardous voltage
protection. Power wiring is installed through the bottom of the cabinet with an optional sidecar available for top
entry wiring. Figure 1-1 shows the Eaton 93PM 20–50 kW, Four Wire UPS and Figure 1-2 shows the Eaton
93PM 20–50 kW, Four Wire UPS with a left or right mounted sidecar.
1.1
UPS Standard Features
The UPS has many standard features that provide cost-effective and consistently reliable power protection. The
descriptions in this section provide a brief overview of the UPS standard features.
1.1.1
Installation Features
Line-up-and-match or standalone configurations
l
Power wiring can be routed through the bottom of the cabinet
l
External battery wiring can be run internally through the left or right sides of the UPS cabinet in
l
line-up-and-match configurations
Easily accessible mechanical terminals located at the bottom front of the cabinet reduce installation time
l
Control wiring can be routed through the top or bottom of the UPS cabinet, or through the left or right sides
l
of the UPS cabinet in line-up-and-match configurations
Built-in casters for easy cabinet placement
l
Cabinet bolt holes are provided for permanently mounting the UPS using optional front and back or left and
l
right side floor mounting bracket kits
Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4
®
93PM 20–50 kW, Four Wire uninterruptible power supply (UPS) is a true online, continuous-duty,
NOTE
Startup and operational checks must be performed by an authorized Eaton
Customer Service Engineer, or the warranty terms specified on page W-1 become
void. This service is offered as part of the sales contract for the UPS. Contact an
Eaton service representative in advance (a minimum two-week notice is required) to
reserve a preferred startup date.
www.eaton.com/powerquality
1-1
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