3.3 UPS features
The Eaton UPS has many features that provide cost-effective and consistently
reliable power protection. The feature descriptions provide a brief overview of
the UPS standard features.
3.3.1
Advanced Battery Management
The Advanced Battery Management technology uses sophisticated sensing
circuitry and a three-stage charging technique that extends the useful service
life of UPS batteries while optimizing the battery recharge time. ABM also
protects batteries from damage caused by high current charging and inverter
ripple currents. Charging at high currents can overheat and damage batteries.
In the
charge mode
, the batteries are recharged. Charging lasts only as long as
it takes to bring the battery system up to a predetermined float level. Once this
level is reached, the UPS battery charger enters the
float stage
and the charger
operates in the constant voltage mode.
The
rest mode
begins at the end of the charge mode; that is, after 96 hours of
float charging (user-adjustable). In the rest mode, the battery charger is
completely turned off. The battery system receives no charge current during this
rest period of approximately 28 days (adjustable). During the rest mode, the
open circuit battery voltage is monitored constantly, and battery charging is
resumed when necessary.
3.3.2
Powerware Hot Sync
The Eaton Powerware Hot Sync technology is an algorithm that eliminates the
single point of failure in a parallel system and therefore enhances system
reliability. The Hot Sync technology is incorporated in all Eaton 91PS/93PS
UPSs, and it is utilized in both multi-module internal parallel and external parallel
systems.
The Hot Sync technology enables all UPMs to operate independently in a
parallel system, even without inter-module communications. The power modules
utilizing the Hot Sync technology are completely autonomous; each module
monitors its own output independently to remain in complete synchronization
with the other modules. The UPM power modules share the load perfectly even
in changing capacity or load conditions.
The Powerware Hot Sync technology combines digital signal processing and an
advanced control algorithm to provide automatic load sharing and selective
tripping in a parallel UPS system. The load share control algorithms maintain
synchronization and load balance by constantly making minute adjustments to
variations in the output power requirements. The modules conform to demand
and are not in conflict with each other for the load. The Powerware Hot Sync
systems are capable of paralleling for both redundancy and capacity.
Eaton 91PS/93PS UPS 8–40 kW
User's and installation guide
©
Eaton Corporation plc 2018. All rights reserved.
Revision: 005
Document ID: P-164000493
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