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3.3.1.1
Double conversion mode
Figure 5: Path of current through the UPS in the double conversion mode
shows
the path of electrical power through the UPS system when the UPS is operating
in the double conversion mode.
Figure 5: Path of current through the UPS in the double conversion mode
A
Static
switch
1
Bypass input
Main power flow
B
Rectifier
2
Rectifier input
Energized
C
Inverter
3
Output
De-energized
D
DC/DC
converter
4
Battery breaker
Trickle current
E
Battery
Closed
Open
Three-phase AC input power is converted to DC using a multilevel converter with
IGBT devices to produce a regulated DC voltage to the inverter. The UPS status
indicated on the display is
Unit Online
and the UPM status is
Active
.
The DC/DC converter derives its input from the regulated DC output of the
rectifier and provides regulated charge current to the battery. The battery is
always connected to the UPS and ready to support the inverter should the utility
input become unavailable.
© Eaton Corporation plc 2020. All rights reserved.
Revision: 001
Document ID: P-164000956
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Eaton 93PM G2 UPS 50 – 360 kVA
User’s and Installation Guide