ENGLISH EDITION Universal SPD coordination towards an effective surge protection of power supply networks

Abstract. The paper describes the principles of effective surge-protection devices (SPDs) coordination for both standard test impulses. Since the SPD coordination is strongly affected by the overvoltage protection components and SPD topology, laboratory measurements for different SPD types and topologies were conducted. The found results are given in the paper. The impact of the test surge impulse shape is recognized as important