The system has one bulk power regulator (BPR) per BPA, with its Phase A and Phase B Line Currents
determined by Power/Vline, and a Phase C Line Current of 0.
Note:
Power is calculated from “Total System Power Consumption” on page 103. Vline is line-to-line
nominal input voltage.
Balancing Power Panel Loads:
The system requires three-phase power. Two of three phases will carry
an equal amount of current, with no current drawn on the third phase. The following figure is an example
of feeding several loads of this type from two power panels in a way that balances the load among the
three phases.
The method illustrated in the preceding figure requires that the connection from the three poles of each
breaker to the three phase pins of a connector be varied. Some electricians may prefer to maintain a
consistent wiring sequence from the breakers to the connectors. The following figure shows a way to
balance the load without changing the wiring on the output of any breakers. The three-pole breakers are
alternated with single-pole breakers, so that the three-pole breakers do not all begin on Phase A.
Chapter 1. Reference Information
95
Summary of Contents for pSeries 670
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Page 973: ...Power and SCSI Cables to the Media Subsystem 1 2 3 5 4 6 Chapter 10 Parts Information 953...
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