What is double busbar arrangement?

Double bus bar is related to power control center (PCC). PCC is the main LT power distribution in any industrial establishment or large residential complex too. It basically an electrical panel with required number of incomer feeders and outgoing feeders. Power source like state power or captive power provide the incomers and outgoing feeders cater to the down stream power panels for further distribution( to MCC). Any PCC has one or more incomer and one or more outgoing feeder and bus isolators depending on the requirement. This PCC needs to have a bus bar to which the incomer gets connected and feeds the power to the bus and the outgoing feeders are connected to the bus bar to deliver the power down stream. This bus bar can be single bus bar system or double bus bar system. In a double bus bar system the two different power sources are connected to two different bus. Say one bus is for DG set power another bus is for SEB power. Both the buses can be charged simultaneously and can feed any outgoing feeders. The out going feeder have flexibility of getting the power either of the buses, but not simultaneously from both the buses. Double bus bar is more expensive compared to single bus bar system but more flexible, reliable.