CAUTION
Do not attempt to restart the system after Load Off until you have
identified and cleared the cause of the shutdown.
7.5
Control a single UPS in a parallel system
7.5.1
Start a single UPS
Make sure that the load level does not exceed the single UPS capacity.
To start the UPS.
1.
Close the UPS input feeder circuit breaker.
2.
Close the UPS bypass input feeder circuit breaker.
3.
Wait for the UPS control panel display to become active and indicate logic
power.
4.
In the home screen, press
Controls
.
5.
Press the UPS controls button.
In the UPS controls screen, the system status is shown as
SHUTDOWN
.
6.
In the UPS controls screen, press the
Go online
button.
If Auto Bypass is enabled (factory default), the critical load is immediately
supplied by the bypass source in the bypass mode, until the inverter turns on
and the UPS transfers to the double conversion mode. The yellow status
indicator on the UPS control panel indicates that the UPS is in the bypass
mode. If auto bypass is not enabled, the UPS output remains off until the
UPS system transfers to the double conversion mode.
7.
In the UPS control screen, press the
Go online
button.
8.
Wait for the following messages to appear sequentially on the UPS status
line:
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. Power is now supplied to the critical
load in the double conversion mode. It takes approximately 20 seconds for
the UPS system to achieve the double conversion mode.
The UPS system is now operating in the double conversion mode and the green
status indicator for normal operation is lit in the UPS and all the UPMs.
© 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
