Starting The Ups In Bypass Mode - Powerware 9390 Installation & Operation Manual

UPS Operating Instructions
7. Observe the following messages appear sequentially on the power module (PM)
8. Close the battery breaker any time after INVERTER SYNCING or CLOSE BATTERY
9. The UPS is now operating in Normal mode and the NORMAL status indicator is

10.1.2 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:
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
1. Close the UPS input feeder circuit breaker.
2. If the UPS is dual feed, close the UPS Bypass input feeder circuit breaker.
3. Observe the UPS control panel becoming active, indicating logic power.
4. Press the CONTROLS pushbutton on the main menu bar. The System Controls
5. On the System Controls screen, the power module (PM) status should indicate
6. Press the BYPASS pushbutton on the System Controls menu bar.
7. The UPS is now operating in Bypass mode and the BYPASS status indicator is
10-2
status line:
DC STARTING
INVERTER STARTING
INVERTER SYNCING
READY
ONLINE
The rectifier and inverter turn on. When the inverter reaches full voltage, UPS
output contactor K3 closes and the static switch turns off supplying power to the
critical load in Normal mode. It takes approximately 1 minute for the UPS to
achieve Normal mode.
appears on the display.
illuminated.
screen appears.
SHUTDOWN.
The critical load is immediately supplied by the bypass source, in Bypass mode.
illuminated.
Powerware 9390 UPS (40–80 kVA) Installation and Operation Manual S 164201535 Rev C
®
C A U T I O N