Single Ups Operation; Starting The Ups In Normal Mode; Starting The Ups In Bypass Mode - Eaton 9395 User And Installation Manual

7.3 Single UPS operation

7.3.1 Starting the UPS in Normal mode

To start the UPS system:
1. If the UPS contains input breaker CB1, verify that input breaker CB1 is open.
2. Close the UPS input feeder circuit breaker.
3. Close the UPS bypass input feeder circuit breaker.
4. Observe the UPS control panel display becoming active, indicating logic power.
5. Press the CONTROLS pushbutton on the main menu bar. The System Status screen appears.
6. On the System Status screen, the UPS status should indicate SHUTDOWN.
7 . Close the battery breaker.
8. If the UPS contains input breaker CB1, close input breaker CB1.
9. Press the GO ONLINE pushbutton on the system controls menu bar.
If Auto Bypass is enabled (factory default), the critical load is immediately supplied by the bypass
source, in Bypass mode, until the inverter turns on and the UPS transfers 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 output remains off until the UPS transfers to normal mode.
10. Observe the following messages appear sequentially on the UPM status line:
DC STARTING
INVERTER STARTING
INVERTER SYNCING
READY
ONLINE
The rectifier and inverter turn on. The inverter continues to ramp up to full voltage.
Once the inverter reaches full voltage, and the battery breaker is closed, the UPS output contactor K3
closes and the static switch turns off. Power is now supplied to the Critical load in Normal mode. It
takes approximately 1 minute for the UPS to achieve Normal mode.
11. The UPS is now operating in Normal mode and the NORMAL status indicator is illuminated.

7.3.2 Starting the UPS in Bypass mode

If the inverter output of the UPS is not available and the critical load needs to be energized, perform the
following procedure:
CAUTION
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
1. If the UPS contains input breaker CB1, verify that input breaker CB1 is open.
2. Close the UPS input feeder circuit breaker.
3. Close the UPS bypass input feeder circuit breaker.
4. Observe the UPS control panel becoming active, indicating logic power.
5. Press the CONTROLS pushbutton on the main menu bar. The System Status screen appears.
6. On the System Status screen, the UPM status should indicate SHUTDOWN.
7 . If the UPS contains input breaker CB1, close input breaker CB1.
8. Press the BYPASS pushbutton on the System Controls menu bar.
The critical load is immediately supplied by the bypass source, in Bypass mode.
9. The UPS is now operating in Bypass mode and the BYPASS status indicator is illuminated.
104 UPS 675-1100 kVA 3..4x(225-275) kVA
User's and Installation Guide
1029052
Revision 008