HP Insight Control Power Management 7.0 User Guide

3-phase Delta, and 3-phase Wye PDUs made up of 1-phase sub-circuits assuming the usage of the
device is balanced.
If you know the input (line) voltage of the device, the output (phase) voltage of each sub-circuit is
defined as:
1-phase - The input (line) voltage
3-phase Delta - The input (line) voltage
3-phase Wye - The input (line) voltage / sqrt(3)
If you know the output (phase) voltage for the sub-circuits, the input (line) voltage of the device is
defined as:
1-phase - The output (phase) voltage
3-phase Delta - The output (phase) voltage
3-phase Wye - The output (phase) voltage * sqrt(3)
Power delivery device total capacity calculations
If you know the line current (lineCurrent), line voltage (lineVoltage), and type of phase for the
device, the total capacity of a power delivery device can be calculated using the following formulas:
For 3-phase Wye:
phaseVoltage = lineVoltage / sqrt(3)
phaseAmps = lineCurrent
phaseWatts = phaseVoltage * phaseAmps
TotalCapacity = 3 * phaseWatts
For 3-phase Delta:
phaseVoltage = lineVoltage
phaseAmps = lineCurrent / sqrt(3)
phaseWatts = phaseVoltage * phaseAmps
TotalCapacity = 3 * phaseWatts
For 1-phase:
TotalCapacity = lineCurrent * lineVoltage
Converting Watts to Amperes
If you know the Watts value (watts), Voltage value (volts), and type of phase for the device, the
watts can be converted to amperes using the following formulas:
For 3-phase Wye or Delta:
amps = (watts / volts) / sqrt(3)
For 1-phase:
amps = watts / volts
Converting Amperes to Watts
If you know the Amperes value (amps), Voltage value (volts), and type of phase for the device, the
amperes can be converted to watts using the following formulas:
For 3-phase Wye or Delta:
watts = amps * volts * sqrt(3)
For 1-phase:
watts = amps * volts
Data Center Power Control
HP Insight Control power management provides you the Data Center Power Control facility to
control power and cooling for the systems in the data centers. Usually, data centers have the
10 Key concepts