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Level 04a, June 21, 2004
Chapter 3. Power Requirements
General Requirements
Power Installation Considerations
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Power Specifications
© Copyright IBM Corp. 2002, 2004
zSeries 800s require a minimum of 2 customer power feeds:
1. Two identical (redundant) feeds for the frame
2. One duplex service outlet positioned within five feet of the machine frame.
The service outlets require standard 100V to 130V or 200V to 240V, 50/60Hz,
single-phase power.
zSeries 800s operate with:
v 50/60Hz AC power
v Voltages ranging from 200V to 240V
v Single-phase wiring
zSeries 800s operate from two fully-redundant single-phase line cords. These
redundant line cords allow the system to survive the loss of customer power to
either line cord. If power is interrupted to one of the line cords, the other line cord
will pick up the entire load and the system will continue to operate without
interruption. Therefore each line cord is intended to be be wired to support the
entire power load of the system.
Important
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. See
Appendix D, "Dual Power Installation," on page D-1 for examples of typical
redundant facilities wiring.
The power supplies at the front end of the system use active resistive load
synthesis. Harmonic distortion of the current waveform is small enough that it need
not be considered in planning the installation. The power factor is typically 0.95.
Table 3-1. Power Supply Ranges and Tolerances
Supply Type
Two redundant single-phase
line cords
Nominal Voltage
Voltage Tolerance
Range (V)
200-240
180-254
Frequency Range
(V)
(Hz)
47-63
3-1
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