Analysis on the Behaviour of 36 kV, 10 kA Pre-failed Polymer Surge Arrester at Short-Circuit Current

In order to study the behaviour of metal oxide surge arresters at short-circuit current, this paper presents an experimental study on four pieces of 36 kV, 10 kA surge arresters at different values of short-circuit current. Prior to the experiments, each surge arrester was electrically pre-faulted with a power frequency overvoltage without any physical modification The tests were carried out under severe conditions at rated short-circuit current, the peak value of the first half cycle of the actual arrester current was at least <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\sqrt{2}$</tex> times the RMS value of the rated short-circuit current.