Use the Phase imbalance and BPR configuration table to determine the phase imbalance of your server's configuration.
Depending on the number of bulk power regulators (BPRs) in your system, phase imbalance can occur in line currents. All systems are provided with two bulk power assemblies (BPAs), with separate power cords. Phase currents will be divided between two power cords in normal operation. The following table illustrates phase imbalance as a function of BPR configuration. For information about power consumption, see Total system power consumption.
| Number of BPRs per BPA | Phase A line current | Phase B line current | Phase C line current |
|---|---|---|---|
| 1 | Power / Vline | Power / Vline | 0 |
| 2 | 0.5 Power / Vline | 0.866 Power / Vline | 0.5 Power / Vline |
| 3 | 0.577 Power / Vline | 0.577 Power / Vline | 0.577 Power / Vline |
| Note: Power is calculated from Total
system power consumption. Vline is line-to-line nominal input
voltage. Because total system power is divided between two power cords,
divide the power number by 2.
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