Installation guide

UPS 40 – 160 kVA, 400V 50/60 Hz output
User’s and Installation Guide
1023294
Revision C
41
7 Operating instructions
The following procedures provide instructions for operating the UPS system.
7.1 Starting the UPS in Normal Mode
To start the UPS system, perform the following procedure:
1. Close the UPS input feeder circuit breaker.
2. Close UPS Bypass input feeder circuit breaker.
3. Observe UPS Control Panel display screen becoming active as an indication of logic
power.
4. Press the CONTROLSpushbutton on the Main menu bar. The System Controls screen
appears.
5. On the System Controls screen, the Power Module (PM) status should indicate
SHUTDOWN.
6. Press the NORMALpushbutton on the System Controls menu bar.
If Auto Bypass is enabled, 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.
7. Observe the following messages appear sequentially on the Power Module (PM) status
line:
DC STARTING
INVERTER STARTING
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.
8. Close battery breaker any time after INVERTER SYNCING or CLOSE BATTERY appears
on the display screen.
9. The UPS is now operating in the Normal mode and the NORMALstatus indicator is
illuminated.
7.2 Starting the UPS in Bypass Mode
If the Inverter Output of the UPS is not available and the critical load needs to be energised,
perform the following procedure:
1. Close the UPS input feeder circuit breaker.