UPS Operation
51
Powerware
®
Prestige Series Installation and Operator’s Manual for IBM Applications (6000 VA)
Uncontrolled Copy
Using the PPDM
The PPDM provides continuous online power for your equipment. With
the PPDM, you can replace or upgrade the PPU without losing power to
your equipment. Figure 18 shows the operation of the UPS with the
PPDM.
PPU
In
Out
Battery
Battery
Utility
Power
PPDM
UPS Load
Figure 18. UPS and PPDM Block Diagram
Disconnecting the UPS
Use the following procedure to transfer the critical load to Maintenance
Bypass (AC Line operation) and remove the PPU:
1.
Turn the Bypass switch on the PPDM to the BYPASS position
(see Figure 19). The PPDM is now powering your equipment
from utility power.
2.
Press and hold the Output
Off button until the long beep
ceases (approximately three seconds). The
indicator
remains lit.
3.
Switch the PPU input breaker to the OFF (O) position.
The UPS enters Battery mode for several seconds. The
indicator turns off and the UPS shuts down.
