Statistical Parameters of the Measured Voltage in the Network

In the article we present a graphical representation of selected statistical parameters long-time measurement of the voltage in the network. The parameters are calculated from samples of 900 measured values (15-minute measurement interval - one measured value per second), measured by UT 803 multimeter. Changes in statistical parameters will allow to detect the dynamics of connecting/disconnecting electrical appliances, long-term too high or too low voltage, or short-time power failure. The reason for some major parameter changes is revealed by a graphical representation of the time courses of the respective measurement section at that day and hour.