The performance meter measures current and voltage values by means of the attached current converters and measuring leads. The active, apparent and reactive power is determined from this and transmitted via WLAN to a terminal every second. There, the data is stored historically and can then be evaluated in tabular or graphical form. Furthermore, it is also possible to export the measurement results to a terminal. The measurement with the power measuring device is done via Rogowski coils or folding current transformer. If there is no Internet connection available, the data can be recorded in the integrated 32 GB large SD memory card in the form of a CSV file, so that they can be processed further later. Even with capturing every second the recording time is more than one year. It is also possible to send the CSV files periodically via e-mail, upload them to a server using FTP or transfer them to the measurement platform after the measurement has been completed. The interaction with the power meter is primarily performed via WLAN and web browser or via APP (BLE).The power supply and measurement is carried out via magnetic measuring tips or connection terminals. The power meter can be connected to any main or sub-distribution as well as in devices and plants - the power supply must not be interrupted. Through the magnetic back of the housing the power meter can be attached to any metallic surface. Power management is a top priority. Without measuring consumption and recording the instrument values such as current, voltage, frequency and power, an improvement in efficiency is hardly possible. The energy meter enables the monitoring of the entire power consumption and helps to reduce energy costs.This text is machine translated.