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B-28 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
FIGURE B-24 AC Section (ACSTPH_C)
■ The ACSTPH_D is a unit that receives three-phase (star) power for the SPARC
Enterprise M9000 server three-phase dual power feed cabinet and switches
between three-phase and single-phase. This unit uses two power cables to receive
power, switch from three-phase to single-phase current internally, and distribute
AC power to 30 PSUs.
FIGURE B-25 AC Section (ACSTPH_D)