Bus

The distribution bus – or simply “bus” – is the electrical structure to which all lines and transformers are connected [1].  Typically, the bus consists of an array of switches and wires used to route power out of a substation or from a transformer.  That is, electricity flows from the transformer to the distribution bus, which then distributes power to separate sets of distribution lines at different voltages [2].  There are two main types of buses: open air and enclosed.  Enclosed busses are typically used when substations are located in buildings or outdoors where space is at a premium [1].

References

1. Casazza, J. and F. Delea, Understanding Electric Power Systems. 2003, Hoboken, NJ: The Institute of Electrical and Electronics Engineers.

2. Brain, M. How Power Grids Work: Distribution Bus.  2007  [cited 2007 9 April].