Table 15. IBM System Storage DS4800 AC power requirements (continued)
Low Range High Range
a.
Typical voltage: 120 V AC, 60 Hz, assumes 75% power-supply efficiency and 0.99 power
factor
b.
Typical voltage: 240 V AC, 60 Hz, assumes 75% power-supply efficiency and 0.99 power
factor
Site wiring and power
The storage subsystem uses wide-ranging redundant power supplies that
automatically accommodate voltages to the AC power source. The power supplies
operate within the range of 90 VAC to 264 VAC, at a minimum frequency of 50 Hz
and a maximum frequency of 60 Hz. The power supplies meet standard voltage
requirements for both domestic (inside USA) and international (outside USA)
operation. They use standard industrial wiring with line-to-neutral or line-to-line
power connections.
The agency ratings for the DS4800 Storage Subsystem are 5 amps at 100 VAC
and 2.25 amps at 240 VAC. These are the overall maximum currents for this
system.
AC power recovery
After normal power is restored after a total AC power failure, the DS4800 Storage
Subsystem performs power-up recovery procedures automatically without operator
intervention.
Power cords and receptacles
The DS4800 ships with the line jumper cords used to connect the DS4800 to rack
power distribution units (PDUs). If you need the AC power cords to connect the
DS4800 to wall receptacle outlets, you must purchase the appropriate power cords
for your country or region as described in Appendix D, “Power cords,” on page 193.
26 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide
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