Powerware 9395 UPS and Plus 1 UPS 650825 kVA - Manual (Page 162)

UPS OPERATING INSTRUCTIONS
EATON Powerware ® 9395 UPS (650–825 kVA) Installation and Operation Manual S 164201725 Rev 2 www.powerware.com 7−20
7.4 Multiple UPS Distributed Bypass Operation
7.4.1 Starting the Distributed Bypass System in Normal Mode
To start the distributed bypass system:
1. If the UPSs contain input breakers (CB1), verify that all input breakers are open.
2. Close all Module Output Breakers (MOBs).
3. Close all UPS input feeder circuit breakers.
4. Close all UPS Bypass input feeder circuit breakers.
5. Observe the UPS control panel displays becoming active, indicating logic power.
6. On any UPS, press the CONTROLS pushbutton on the main menu bar. The System
Status screen is displayed.
7. On the System Status screen, verify the UPS status is SHUTDOWN and the UPM
status is OFFLINE.
8. Close all battery breakers.
9. If the UPSs contain input breakers (CB1), close all input breakers.
10. On the System Status screen, select the UPS command.
11. Press the CONTROLS pushbutton on the System Status menu bar. The UPS
Control Command screen is displayed.
12. On the UPS Control Command screen, select GO TO NORMAL .
13. Press the SELECT pushbutton on the UPS Command menu bar.
If Auto Bypass is enabled (factory default), the critical load is immediately
supplied by the bypass source in Bypass mode from all UPSs, until the inverter
turns on and the UPSs transfer to Normal mode. The status indicator on the UPS
control panel indicates the UPS is in Bypass mode. If Auto Bypass is not enabled,
the UPS outputs remain off until the UPSs transfer to Normal mode.
14. Verify the following messages display sequentially on the UPS status line:
DC STARTING, CHARGER OFF
INVERTER STARTING
INVERTER SYNCING
ONLINE, CHARGING
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 Normal
mode from all UPSs. It takes approximately one minute for the UPSs to achieve
Normal mode.
The NORMAL status indicator is illuminated. The UPS status indicates ONLINE.
The UPM status indicates ONLINE, CHARGING.