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B-30 SPARC Enterprise M8000/M9000 Servers Service Manual • October 2012
■ The ACSTPH_A is a unit that receives three-phase (delta) power for the M8000 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 18 PSUs.
FIGURE B-23 AC Section (ACSTPH_A)
■ The ACSTPH_B is a unit that receives three-phase (star) power for the M8000 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 18 PSUs.
FIGURE B-24 AC Section (ACSTPH_B)