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Level 04a, June 21, 2004
Appendix D. Dual Power Installation
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Figure D-1. Dual Power Installation - Redundant Panel and Switch
© Copyright IBM Corp. 2002, 2004
The zSeries 800 models are designed with a fully redundant power system. Each
computer has two line cords attached to two power input ports which, in turn, power
a fully redundant power distribution system within the computer. To take full
advantage of the redundancy/reliability that is built into the computer system, the
system is intended to be powered from two distribution panels.
I M P O R T A N T
Each power cord is intended to be supplied by a different source.
Since the zSeries 800 operates on single-phase power, power redundancy is
realized only if the source to each line cord is different. Failure to provide separate
power sources will lead to system failure in the event of a power outage.
Here we will present three examples of redundancy.
Example 1 (redundant distribution panel and switch gear)
In this example, the computer receives power from two separate power distribution
panels. Each distribution panel receives power from a separate piece of building
switch gear. This level of redundancy is not available in most facilities.
Switch Gear
Switch Gear
Distribution
Panel
Distribution
Panel
D-1
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