Eaton 93E G2 100/100 User And Installation Manual page 20

Eaton 93E Generation 2 UPS 100-200 kVA
(380/400/415V)
Figure 3. Path of current through the UPS in the double conversion mode
A Static
switch
B Rectifier
C Inverter
D Battery con-
verter
E Battery
The battery converter derives its input from the regulated DC output of the
rectifier and provides regulated DC voltage and 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, or supporting rectifier in the low
input mains (power share) and in the overload situations.
The inverter produces a three-phase AC output to a customer's load without the
use of a transformer. The inverter derives regulated DC from the rectifier, or the
battery converter, and uses IGBT devices and pulse-width modulation (PWM) to
produce a regulated and filtered AC output. The AC output of the inverter is
delivered to the system output through the output contactor.
If the utility AC power is interrupted or is out of specification, the UPS
automatically switches to the stored energy mode to support the critical load
without interruption. When utility power returns, the UPS returns to the double
conversion (normal) mode.
©
Eaton Corporation plc 2019. All rights reserved.
1 Bypass in-
put
2 Rectifier in-
put
3 Output
4 Battery
breaker
Closed
Revision: 002
User's and installation guide
Main power flow
Energized
De-energized
Trickle current
Open
Document ID: P-164000848 20 (118)