In double busbar wiring
Double busbar wiring is a substation configuration where two busbars (conductive bars that serve as common connection points for multiple circuits) are used to distribute electrical power. Here, we provide an overview of common substation busbar configurations—Single Bus, Main and Transfer, Double Breaker/Double Bus, Ring Bus/Ring Main, and Breaker and a Half. Designing a substation involves not only the visible equipment and ratings but also the less apparent factors—operational. In double bus bar system two identical bus bars are used in such a way that any outgoing or incoming feeder can be taken from any of the bus. Actually every feeder is connected to both of the buses in parallel through individual isolator as shown in the figure. These setups are designed to enhance system reliability, flexibility, and fault tolerance.
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