13.Observe the following messages appear sequentially on the PPU status line:

WAITING FOR INPUT DC STARTING INVERTER STARTING SYNCING

ONLINE

The inverter turns on. When the inverter reaches full voltage, UPS output contactor K3 closes supplying power to the critical load in Normal mode. It takes less than 1 minute for the UPS to achieve Normal mode.

14.The UPS is now operating in the Battery mode and the BATTERY status indicator is illuminated.

9.6Transfer from Normal to Bypass Mode

To transfer the critical load to bypass mode, perform the following procedure:

WARNING:

In Bypass Mode, the critical load is not protected from commercial power interruptions and abnormalities.

1.Press the System Control pushbutton. The System Control screen appears.

2.Select BYPASS from the System Control menu.

Bypass Mode Requested appears on the screen.

The UPS switches to Bypass mode and the critical load is immediately supplied by the bypass source. If the bypass source is not available, the power processor remains on and an alarm sounds.

3.The UPS is now operating in the bypass mode and the BYPASS status indicator is illuminated.

The PPU status indicates READY. System is now on bypass and UPS power processor remains on.

WARNING:

Power is present inside the UPS and Options cabinets.

Powerware 9330 (10 kVA--40 kVA) Installation and Operation

9--5

164201300 REV. G 061502

 

Page 119
Image 119
Powerware 9330 operation manual Transfer from Normal to Bypass Mode