Fundamental Aspects of Some Switching Overvoltages on Power Systems

System overvoltages caused by switching are of interest in insulation coordination problems. This paper treats such overvoltages in a graphical fashion, so that a visual concept of overvoltage versus time is provided in both single-and 3-phase cases involving resistive loads, inductive loads, and capacitive loads. As special cases, attention is given to a neutral inversion problem and to a case of coupled circuits.