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Chapter 4 FRU Removal Preparation 4-25
FIGURE 4-1 Internal Connection of Power Supply (Single-Phase Power Feed)
FIGURE 4-2 Internal Connection of Power Supply (Three-Phase Power Feed)
To use three-phase power feed, you need the three-phase power feed option and the
power cabinet for mounting the power supply.
In case of three-phase power feed, AC section is not located in the SPARC Enterprise
server cabinet. The AC section for the three-phase power feed is located in the power
cabinet.
Two types of options are available for three-phase power feed, the star connection
and the delta connection: the star connection option has two sorts of connections,
connection for the neutral line and connections for phases, and the delta connection
option has connections for phases. For details, see the SPARC Enterprise
M8000/M9000 Servers Site Planning Guide.
ACS
AC
PSU
PSU
PSU
(ON/OFF)(ON/OFF)
Main line switch Power supply unit
Distribution panel
ACS ACS_D
ACS_D
ACS_D
ACS_D
AC
PSU
PSU
PSU
PSU
(ON/OFF)(ON/OFF) (ON/OFF)
Main line switch Power supply unit
Distribution panel
Switch