Destructive states in the area defined as a no-damage region in the ITIC / SEMI F47 curve

The spreading application of robotised systems and the technological development of converter systems that cause a number of disturbances of electric power quality give rise to the question whether their impact on the lifetime of electric receivers and their peripheries is not in excess of normative standards. The authors, in cooperation with some authorised after-sales service providers for industrial robot suppliers, have observed a rising number of after-sales complaints that remain unsolved, where the cause of robot stoppage or damage is not diagnosed. The authors believe this situation is directly caused by the fact supply voltage sags and returns to its default value are not registered (a lack of sag records) and relations are not analysed between voltage sags, current, and anomalous states of industrial robots’ automatic systems. In search for evidence of the destructive effects of voltage sags, the authors have undertaken some research and identified states destructive to electric receivers (in this case, industrial robots) in the region the ITIC / SEMI F47 curve defines as no-damage.