3
Introduction to Eaton UPS
3.1
About the Eaton UPS
Figure 1: 15/20 kW C-model frame, 15/20 kW standard frame and 30/40 kW
frame
The Eaton® 91PS/93PS uninterruptible power supply (UPS) is a true online,
continuous-duty, transformerless, double-conversion, solid-state single-phase
(91PS) or three-phase (93PS) system. It supplies conditioned and uninterruptible
AC power to critical load and protects it from power failures.
The UPS 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 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 require for
reliable operation. During brownouts, blackouts, and other power interruptions,
batteries provide emergency power to safeguard operation.
The UPS system is housed in a single, free-standing cabinet with safety shields
behind the door for protection against hazardous voltage. Each UPS cabinet has
a centralized system static bypass. The available static bypass ratings are 15
and 30 kW for 91PS and 20 kW and 40 kW for 93PS. The static bypass size is
chosen according to UPS system power. For example, if a future requirement is
to upgrade the UPS capacity, the UPS bypass rating has to be selected
accordingly. In addition, the bypass ratings of all the UPS cabinets in a parallel
system need to be matched.
Eaton 91PS/93PS output power ratings are based on 15 kW or 20 kW rated
uninterruptible power modules (UPMs).
© Eaton Corporation plc 2020. All rights reserved.
Revision: 006
Document ID: P-164000493
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Eaton 91PS/93PS UPS 8–40 kW
User’s and Installation Guide
