Electric Arcs in Photovoltaic Systems: A Comparative Analysis of IEC 63027, UL 1699B, and GB-t 39750 Standards

Arc faults have become a critical safety concern in photovoltaic systems. To address the need for arc fault protection and testing procedures to certify protective equipment, various standards have been developed worldwide. This paper presents a comprehensive analysis of three regulatory standards: IEC 63027, UL1699B, and GB-t 39750, which establish requirements and testing procedures for arc-fault detection and protection equipment in photovoltaic systems. By highlighting similarities and differences between these standards, this comparison helps understand the regulatory approaches adopted by each standard and provides valuable insights for manufacturers, regulators, and other professionals in the photovoltaic industry. Additionally, this analysis can provide groundwork for the formulation of a Brazilian standard for arc-fault protection in solar power generation plants as well as DC microgrids.