9.4Starting the Power Processing Unit
To start the Power Processing Unit (PPU) without transferring the critical load to normal, perform the following procedure:
1.Ensure the UPS circuit breakers and switches are set as follows:
UPS Input Breaker (CB1) | OPEN |
UPS Battery Breaker (CB2) | OPEN |
UPS Maintenance Bypass Switch | UPS |
Options Cabinet Maintenance Bypass Switch (if installed) | UPS |
2.Close the UPS input feeder circuit breaker.
3.If UPS is dual feed, close UPS Bypass input feeder circuit breaker.
4.If Options cabinet is installed, close Options cabinet Input, Bypass, and Output circuit breakers.
5.Observe UPS monitor screen becoming active as an indication of logic power.
6.Press the System Control pushbutton. The System Control screen appears.
7.On the System Control screen, the PPU status should indicate SHUTDOWN, after approximately 20 seconds
8.On the UPS, close Input breaker CB1.
9.On the UPS, close Battery breaker CB2.
10.If installed, close the Battery breakers on Battery cabinets.
11.Select PPU ON from the System Control menu.
PPU ON Mode Requested appears on the screen.
The critical load is immediately supplied by the bypass source, in Bypass mode. The status indicator on the UPS Control Panel indicates the UPS is in Bypass mode.
12.Observe the following messages appear sequentially on the PPU status line:
WAITING FOR INPUT DC STARTING INVERTER STARTING SYNCING
READY
The rectifier and inverter turn on. When the inverter reaches full voltage,the UPS is ready to transfer to the Normal mode and supply the critical load.
13.The UPS is now operating in the Bypass mode and the BYPASS status indicator is illuminated.
Powerware 9330 (10 | |
164201300 REV. G 061502 |
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