UPS OPERATING INSTRUCTIONS
7.4Multiple UPS Distributed Bypass Operation
7.4.1Starting 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.
7−20 | EATON Powerware® 9395 UPS |
