Powerware 9315 - Manual (Page 36)

30 Powerware 9315 Parallel Redundant System I & O
164202013, Rev. D 041599
Looking Inside the Parallel Redundant System
The parallel redundant system supports the normal operation of the PowerwareÒ
9315 UPS system by offering parallel redundant capability. The UPS system
continues to maintain power to the critical loads during commercial electrical power
brownout, blackout, overvoltage, undervoltage, and out-of-tolerance frequency
conditions. The parallel redundant system ties two UPS modules together, in
parallel, in order for continuous power to flow even when one module becomes
disabled. Refer to Figure 13 in Appendix A of this manual for the detailed
relationship of the parallel cabinet and the UPS modules.
If utility power is interrupted or falls outside the parameters specified in the
PowerwareÒ 9315 Operation manual, the UPS system uses a backup battery
supply to sustain power to the critical load for a specified period of time or until the
utility power returns. For extended power outages, the backup battery supply
allows you to either transfer to an alternate power system (such as a generator) or
shut down the critical load in an orderly manner. Refer to the PowerwareÒ 9315
Operation manual provided with the UPS system for operation of the UPS.