A test procedure for determining models of LV equipment

An automated test technique for determining parameters of low voltage equipment is presented in the paper. The aim of this research is to obtain simple models of household, office and industrial equipment which could be used to predict power quality problems during the design of low voltage installations and networks. For that purpose, several types of equipment were tested in the PQ laboratory and in this phase of the research, the emphasis is on inrush currents and interaction between voltage and currents during voltage changes (magnitude and harmonic content changes)