What is the accuracy of the energy consumption parameter (APH) for Altivar 71 drive.
The APH is calculated regarding motor electrical consumption measured by the drive to supply the motor (motor current and motor voltage). so it includes
mechanical losses. In all the cases the drive doesn't measures reactive power.
The precision of APH is about 10%. The losses of VSD are insignificant regarding this accuracy.
Note: It is not recommended to use the consumption measurement APH for electrical billing for instance.
This value has to be considered just like information.
If, you want to know with precision of the energy consumption of the drive, it is necessary to put a real measurement tool like PowerLogic ION8650.