8.
Wait for the following messages to appear sequentially on the System
controls screen:
STARTING
ONLINE
The rectifier and inverter turn on. The DC voltage continues to ramp up to full
voltage. Once the DC link reaches full voltage and the battery breaker is
closed, the UPS output relay K3 closes and the static switch turns off. Power
is now supplied to the critical load in the double conversion mode.
The UPS system now operates in the double conversion mode. The green status
indicator for normal operation is lit in all the UPSs and UPMs in the system. The
system status is shown as
UNIT ONLINE
. The UPM status is shown as
ACTIVE
.
7.4.2
Start the UPS system in the bypass mode
CAUTION
In the bypass mode, the critical load is not protected from mains power
interruptions and abnormalities.
If the inverter output of the UPS is not available and the critical load needs to be
energized, do this:
1.
Close the UPS input feeder circuit breaker.
2.
Close the UPS bypass input feeder circuit breaker.
3.
Wait for the UPS control panel to become active and indicate logic power.
4.
Repeat steps 1-3 for each single UPS in the system.
5.
In the home screen, press
Controls
.
The System controls screen appears.
6.
In the System Controls screen, make sure that the system status is
SHUTDOWN
.
7.
In the System controls screen, press the
Go to bypass
button.
The critical load is immediately supplied by the bypass source, in the bypass
mode.
The UPS system is now operates in the bypass mode. The yellow bypass status
indicator is lit.
7.4.3
Transfer from the bypass mode to the double conversion mode
To transfer the critical load to the double conversion mode:
1.
In the home screen, press
Controls
.
The System controls screen appears.
© Eaton Corporation plc 2020. All rights reserved.
Revision: 001
Document ID: P-164000956
98 (141)
Eaton 93PM G2 UPS 50 – 360 kVA
User’s and Installation Guide