This process, called “jointing,” may be needed to create a longer busbar from shorter, more manageable pieces; or to create a T-shaped tap-off connection from the main busbar. The result of jointing must simultaneously meet multiple objectives. In line with the discussed scenario, we will look at the design of auto-manual changeover logic between two busbars within a substation in this article. Single Line Diagram The simple layout diagram of a substation is provided below in which two step-down transformers TR1 and. Yes, a double bus system can be configured with a bypass or a bus tie connection and/or multiple switching arrangements. The subsequent circuit breaker also has a three-phase design and. For double busbar with bypass connection, when one vertical fuse switch disconnector is locked out of opening and closing due to other reasons, nhrt40 vertical fuse switch disconnector can be used to operate the other busbars, and an isolating switch can be used in parallel circuit Previous How Do. Whether single or multiple busbars are necessary will depend mainly on how the system is operated and on the need for sectionalizing, to avoid excessive breaking capacities. Account is taken of the need to isolate parts of the installations for purposes of cleaning and maintenance, and also of.