Impactos na proteção elétrica devido à circulação de corrente de terceira ordem por condutor de proteção (PE) durante transientes de manobra em data center

The article presents research and discussions on the untimely action of ground leakage protection (GS) during the occurrence of voltage and current transients during the transition of synchronized power supplies from supply systems to data center. The sources are composed by the utility company and generators of the consumer in medium voltage - MT. The sources feed systems composed by Trafos MT/BT that feed the UPS's that are equipped with rectifiers built with IGBTs. The article presents discussions on the fundamentals of electrical projects associated with research and measurements carried out in the field with the objective of identifying the causes of the performance of electrical protection during the transition and recommending corrective actions for the case and analogous topologies of feeding critical mission loads.