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B-32 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
B.19 Power Cabinet
A dual power feeder (DPF) and a three-phase AC power feeder are mounted on the
power cabinet. All of these are optional.
The dual power feeder receives its power supply from two independent external
power sources, ensuring that, even if a failure occurs in one source, power is
supplied to the system from the other source that in normal state. It supports both
single-phase and three-phase AC.
The three-phase AC power feeder is required when the input power is three-phase
AC.