Electrical substation
![A 50 Hz electrical substation in Melbourne, Australia. This is showing three of the five 220 kV/66 kV transformers, each with a capacity of 150 MVA. This substation is constructed using steel lattice structures to support strain bus wires and apparatus.[1]](/Images/godic/202501/09/Melbourne_Terminal_Station0240.JPG")
![A 115 kV to 41.6/12.47 kV 5 MVA 60 Hz substation with circuit switcher, regulators, reclosers and control building at Warren, Minnesota. This substation shows elements of low-profile construction; apparatus is mounted on individual columns.](/Images/godic/202501/09/Electrical_Substation0241.JPG")
![A distribution substation in Scarborough, Ontario disguised as a house, complete with a driveway, front walk and a mown lawn and shrubs in the front yard. A warning notice can be clearly seen on the](/Images/godic/202501/09/SubstationHouseScarborough0241.jpg")
![Switchyard at Grand Coulee Dam, USA, 2006](/Images/godic/202501/09/Grand_Coulee_Dam_electrical_switchyward0241.jpg")
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels.