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2.8.3 Three-phase power feed


2.8.3 Three-phase power feed
Three-phase power feed is a method of receiving power feeds from a three-phase power supply rather than a single-phase power supply.
The customer needs to prepare an external power distribution unit for three-phase power feed for the SPARC M10-4S. There are two types of three-phase power feed: three-phase star connection and three-phase delta connection.
An expansion rack can have three-phase power feed according to the selection of the three-phase star type or three-phase delta type. The power distribution units of an expansion rack are mounted inside the rack.

Figure 2-17, Figure 2-18, Figure 2-19 and Figure 2-20 show a power supply system with three-phase power feed.
Figure 2-17  Power supply system with three-phase power feed (star connection)
Figure 2-17  Power supply system with three-phase power feed (star connection)
Figure 2-18  Power supply system with three-phase power feed (delta connection)
Figure 2-18  Power supply system with three-phase power feed (delta connection)
Figure 2-19  Power supply system with three-phase power feed (expansion rack: single power feed)
Figure 2-19  Power supply system with three-phase power feed (expansion rack: single power feed)
*1 For expansion rack 2, use PDU#3.
*2 For expansion rack 2, use PDU#2.
*3 Each PDU outlet is connected to the power cord shown in the figure. The system consumes no power when there is no device connected to the PDU outlets. For the wiring of power cords within the expansion rack, see Figure 2-23.
Figure 2-20  Power supply system with three-phase power feed (expansion rack: dual power feed)
Figure 2-20  Power supply system with three-phase power feed (expansion rack: dual power feed)
*1 For expansion rack 2, use PDU#3.
*2 For expansion rack 2, use PDU#2.
*3 Each PDU outlet is connected to the power cord shown in the figure. The system consumes no power when there is no device connected to the PDU outlets. For the wiring of power cords within the expansion rack, see Figure 2-23.