Such a system consists of two bus-bars, a “main bus-bar and a “spare” bus-bar (see Fig. 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. Busbars are conductive metal bars, strips, or assemblies that collect and distribute electrical current inside power equipment. They are used where a circuit needs a compact, reliable, high-current connection point, such as switchgear, panelboards, substations, busway, battery systems, and. The arrangement and connection of incoming and outgoing feeders in grid stations and substations and the number of busbars have a significant influence on the supply reliability of the power system. Grid stations and substations, and the topology of the power systems must be designed in a similar. In Simple words, a bus-bar is a common connection point or a node for multiple incoming and outgoing circuits such as power lines or feeders. As we know it is impractical to connect multiple conductors at one point. Bus-bars are copper rods or thin walled tubes and operate at constant voltage. In this article, we shall discuss some important. Various electrical bus system schemes exist, and selecting the right one depends on system voltage, position of substation in electrical power system, required flexibility, and cost. Easy maintenance of different equipments.