Since there are two sections, separated by a circuit breaker, the fault on one section does not interrupt the other section of the bus. Maintenance of the bus section can be done individually, without affecting other. A recent study found that there are roughly 30,000 arc flash incidents in the United States each year, many of which are powerful enough to cause significant injury to workers and costly damage to equipment2. The adoption of busbar power distribution systems on a global scale has accelerated in the. Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 November 2014 Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 Companies involved in the preparation of this Guide Acknowledgements. This is a single bus system, with additional circuit breaker and isolators, making two different sections of bus, hence called a single bus system with bus sectionalizer. This table is now included in the new annex, which formally makes this. 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. We have several busbar arrangements employed in grid stations and substations; they include: This is the simplest arrangement of a substation as illustrated in figure 1 (a). The outgoing feeders are connected to a single busbar and a single transformer is installed. Independently of the number of.