Measurement method, program and device for measuring power or energy of an electric motor

A device for measuring an active power and/or a mechanical power and/or an active energy and/or a mechanical energy of a motor being electric, the device comprising:

• at least one measurement sensor for measuring a real current of the motor,
• wherein the device further comprises a calculator comprising at least one interface for inputting at least a nominal power datum of the motor, a nominal speed datum of the motor, a nominal current datum of the motor, a nominal voltage datum of the motor, a power factor datum of the motor and the real current of the motor,
• the calculator being configured to calculate a no-load current of the motor according to first recorded functions depending at least on the nominal power datum of the motor, on the nominal current datum of the motor, on the nominal voltage datum of the motor and on the power factor datum of the motor,
• the calculator being configured to calculate the active power and/or the mechanical power and/or the active energy and/or the mechanical energy according to at least one second recorded function depending at least on the nominal power datum of the motor, the nominal current datum of the motor, the real current and the no-load current having been calculated, the calculator comprising an output interface for providing the active power and/or the mechanical power and/or the active energy and/or the mechanical energy, having been calculated.