Common methods of protecting busbars include overcurrent-based interlocking schemes, overcurrent-based differential protection, high-impedance differential protection, and percentage differential protection. Whether you're designing a new switchgear assembly or maintaining existing distribution panels, understanding proper connection methods. Busbar protection (BBP): Protection intended to detect and operate to clear faults on a busbar. For such complex buses, busbar protection must be able to protect each bus segment individually, and dynamically keep track of the circuits connected to a specific bus segment. Bus bars are conductive bars that serve as common connectors for multiple circuits within a substation. Over- current protection with.