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Figure 5. Path of current through the UPS in the Energy saver System mode
A Static
switch
1 Bypass in-
put
Main power flow
B Rectifier
2 Rectifier in-
put
Energized
C Inverter
3 Output
De-energized
D Battery con-
verter
4 Battery
breaker
Trickle current
E Battery
Closed
Open
In the ESS mode, the UPS safely provides mains current directly to the load
when the input is within the acceptable limits by its voltage and frequency. The
UPS status indicated on the display is
Unit Online ESS
, and the UPM status
is
Active
. Surge protection and some filtering is also provided, making sure
that clean power is delivered to the load equipment. In case any disturbances
are detected in the incoming power, the UPS switches to the double conversion
mode and continues to supply the critical load through its inverter. In case of a
complete utility outage or if the input power is outside the tolerances of the
system, the UPS transfers to the battery mode and continues to supply
conditioned, clean power to the critical load.
When operating in the ESS mode, the UPS's superior detection and control
algorithms continuously monitor the incoming power quality and allow fast
Eaton 93PS UPS 8–40 kW
User's and installation guide
©
Eaton Corporation plc 2016. All rights reserved.
Revision: 003
Document ID: P-164000493
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