UPS OPERATING INSTRUCTIONS
Power Xpert
9395 UPS (450–550 kVA) Installation and Operation Manual
164201701 Rev 3
www.eaton.com/powerquality
7-27
17.
Verify the following messages display sequentially on the UPS status line:
DC STARTING, CHARGER OFF
INVERTER STARTING
INVERTER SYNCING
ONLINE, CHARGER ON
The rectifier and inverter turn on. The inverter continues to ramp up to full
voltage.
Once the inverter reaches full voltage, all UPS output contactors (K3) close and
the bypass circuits open. Power is now supplied to the critical load in Online
mode from all UPSs. It takes approximately one minute for the UPSs to achieve
Online mode.
The
Online
status indicator is illuminated. The UPS status indicates
ONLINE
. The
UPM status indicates
ONLINE, CHARGER ON
.
7.4.2
Starting the Distributed Bypass System in Bypass Mode
If the inverter output of the distributed bypass system is not available and the critical
load needs to be energized:
C
A
U
T
I
O
N
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
1.
Unfasten the front door latches and swing the doors open on all of the UPSs (see
Figure 4‐2 on page 4-4).
2.
If the UPSs contain input breakers (CB1), verify that all input breakers are open.
3.
Close all MOBs.
4.
Close all UPS input feeder circuit breakers.
5.
Close all UPS Bypass input feeder circuit breakers.
6.
If the UPSs contain input breakers (CB1), close all input breakers.
7.
Close the doors and secure the latches.
8.
Observe the UPS control panel displays becoming active, indicating logic power.
9.
On any UPS, press the
CONTROLS
pushbutton on the main menu bar. The System
Status screen is displayed.
10.
On the System Status screen, verify the UPS status is
SHUTDOWN
and the UPM
status is
SHUTDOWN
.
11.
On the System Status screen, select the
BYPASS
command.
12.
Press the
CONTROLS
pushbutton on the System Status menu bar. The Bypass
Control Command screen is displayed.
