substation

Definitions

Construction

  • An assembly of equipment, including switches, circuit breakers, buses, and transformers, for switching power from one voltage or system to another.

Electronics

  • A station which is a part of a larger station, which supplements a larger station, or which is located between larger stations or between a larger station and another location. For example, a station between a power station and a group of homes. Also spelled sub-station.
http://www.dictionarycentral.com/definition/substation.html