How is the Accumulated Power Consumption (APH) calculated on the ATV61 and ATV71 drives?
Altivar ATV61 and ATV71
Accumulated Power Consumption (APH)
The APH is calculated regarding motor electrical consumption measured by the drive to supply the motor ( motor current, motor voltage) so it includes mechanical losses.
The drive does not measure reactive power making the precision of the APH about 10%. The losses of the VSD are insignificant regarding this accuracy.
Please note it is not recommended to use the consumption power measurement APH for electrical billing for instance.