Harmonic emissions measurements as per EN 61000-3-2

Abstract

Summary form only given, as follows. Distribution lines present a finite impedance to harmonic currents. They are transformed into harmonic voltages that can be resonant at some frequency. Harmonic voltages render the following adverse effects: (i) insulation impairment; (ii) thermal (long-term) effects as conductor losses, losses in the iron of magnetic circuits and dielectric losses; all of which are caused by the circulation of harmonic currents; (iii) charge disruption, which is a phenomenon that can be defined as abnormal operation or failure, caused by voltage distortion (for example, relays and zero crossing synchronised devices); (iv) and consumption of harmonic reactive power that cannot be compensated. This paper describes limits and methods of harmonic emissions measurement as per EN 61000-3-2 specification which is mandatory as per the EMC Directive.