Transients in Low-Voltage Supply Networks

For nearly 28000 transients, appearing at 40 measuring places during a total measuring time of about 3400 h on low-voltage supply networks in industrial and nonindustrial areas, time-domain parameters were determined. Of about one-third of the transient disturbances, a Fourier transform yielded frequency-domain data. After a description of the automated measuring system (AMS), results of measurements are presented. A statistical evaluation of several time-and frequency-domain transient parameters proved to be possible. In additional analyses, parameters are derived which are of interest in electro-magnetic-disturbance calculations and conducted-susceptibility tests.