For a detailed substation model a TopologicalNode is a set of connectivity nodes that, in the current network state, are connected together through any type of closed switches, including  jumpers. Topological nodes changes as the current network state changes (i.e., switches, breakers, etc. change state).<br /></p><p>For a planning model switch statuses are not used to form TopologicalNodes. Instead they are manually created or deleted in a model builder tool. TopologialNodes maintained this way are also called "busses".<br /></p>