Transfer From Normal To Bypass Mode With Ups Shutdown; Ups And Critical Load Shutdown; Ups Maintenance Bypass Transfer - Powerware 9330 Installation & Operation Manual

10.10Transfer from Normal to Bypass Mode with UPS
Shutdown
1.
Transfer critical load to bypass by performing procedure in paragraph 10.6.
2.
Press the System Control pushbutton. The System Control screen appears.
3.
Toggle PPU OFF from the System Control menu.
The PPU status indicates SHUTDOWN.
open and the PPU is turned off. The bypass source supplies the critical load.
WARNING:
Power is present inside the UPS and Options cabinets

10.11 UPS and Critical Load Shutdown

To perform maintenance or service on the critical load, shut down power to the
load by performing the following procedure:
1.
Turn off all equipment that is being powered by the UPS.
2.
Perform LOAD OFF procedure contained in paragraph 10.15.1
The input, output, battery and bypass backfeed contactors open and the PPU is
turned off.
3.
On the UPS, open Input circuit breaker CB1.
4.
On the UPS, open Battery circuit breaker CB2.
5.
If installed, open the Battery breakers on Battery cabinets.
6.
If Options cabinet is installed, open Options cabinet Bypass, and Output circuit
breakers.
WARNING:
Power is present inside the Options cabinet, until
circuit breaker is opened. Power is present inside the UPS cabinet due
to internal batteries.
7.
Open the UPS input feeder circuit breakers.

10.12UPS Maintenance Bypass Transfer

To transfer the critical load to Maintenance Bypass, perform the following
procedure:
1.
Transfer critical load to bypass by performing procedure in paragraph 10.6.
2.
Manually set the UPS Maintenance Bypass Switch to BYPASS, by turning
slowly through the TEST position to BYPASS.
The input, output, battery and bypass backfeed contactors open and the PPU is
turned off. The maintenance bypass source supplies the critical load.
WARNING:
Power is present inside the UPS and Options cabinets
Powerware 9330 (IBM 9910 20 kVA) Installation and Operation
164201491 REV. B 013004
The input, output, and battery contactors
.
the upstream input feeder
.
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