This guide provides a detailed technical description, calculations, design considerations, and best practices for designing busbar systems in substations. As we know it is impractical to connect multiple conductors at one point. Hence we use bus bars, where these connections can be done spaciously and. 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. Those substations which change the voltage level of electric supply are called transformer substations. These substations receive power at some voltage and deliver it at some other voltage. They are designed in various shapes—rectangular, round, solid, hollow, or flexible—making them versatile enough to meet the needs of diverse applications. In essence, busbars are junction points. A busbar is essentially a metallic strip or bar, typically made of copper or aluminum, that serves as a central point for collecting and distributing electrical current.