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Public-images-osm logo.svg substation
Specifies substation type
Group: Power
Used on these elements
may be used on nodesshould not be used on waysmay be used on areasshould not be used on relations
Useful combination
Status: ApprovedPage for proposal

Tag substation=* is used in two contexts shown below.

Electrical substations

Electrical substations as part of power transmission and distribution network. Use it with power=substation tag.

Key Value Comment
substation transmission A transmission substation is a substation whose main function is to connect and switch transmission lines transmitting power between areas. It is suggested to use this value for substations handling voltages above 100 kV since transmission grids in most parts of the world have a voltage of 110 kV or higher. A transmission substation may also feed a medium voltage distribution grid (typically having a voltage of less than 100 kV). Substations collecting power from one or more generators of a power plant should also be considered to be of this type.
distribution A distribution substation is a substation coupled to a medium voltage distribution grid mostly having a voltage between 25 kV and 90 kV and that typically feeds a lower voltage distribution network (e.g. 10 kV) of an area. A distribution substation may be fed from the transmission grid via a transformer (see above) but provides no switching of transmission power lines (otherwise use substation=transmission). Unless fed from the transmission grid the highest voltage level will typically be 90 kV or lower. The lowest voltage is typically higher than 2.4 kV. A distribution substation does not directly supply households (see minor_distribution substation below).
minor_distribution This is a small substation at the lowest level of transforming in the distribution grid. This kind of substation directly supplies households and small businesses with low voltage power (e.g. 400V/230V in Europe). It is fed from the medium voltage distribution grid normally having a voltage between 3 kV and 30 kV. The substation is normally of the indoor type located in a small masonary building or prefabricated kiosk.
converter A converter substation ([1]) comprises an HVDC converter plant. It usually also performs the functions of a normal transmission substation.
compensation A compensation substation is used only for compensation of reactive power of a power line or underground cable. It usually does not comprise transformers or switchgear except possibly switches for disconnecting the compensation components such as reactors or series capacitors.
transition A transition station sometimes referred to as transition yard. This is not a real substation but a fenced-off area with cable terminals where an underground cable connects to an overhead power line. It comprises no active components such as switches or transformers. If the cable terminals are located in the tower itself (no fenced area on the ground) don't tag this as a substation. Use the attribute location:transition=yes on the tower instead.
traction A traction substation (605-01-06) is a substation whose main function is to supply a traction system (railways, trams and/or trolleybuses). They are often located near a railway.
industrial Electrical substations may be found inside large industrial plants such as refineries and steel mills.

Pipeline substations

Pipeline substation is various pipeline facilities for distribution, compression, flow control (valves) etc. Use it with pipeline=substation tag.

Key Value Note
substation compression A substation which main purpose is to increase the pressure of the medium inside the pipeline.
distribution A substation whose main purpose is to distribute the medium from one pipeline to other (minor) pipelines (or vice versa). Sometimes heat pipeline distribution substation process heat transfer from one medium to another (usually from special solution to water). Use pipeline:heat_transfer=yes to attribute that.
measurement A substation whose main purpose is the gathering of various measurements of a pipeline.
valve (Usually) A building where the flow of the medium in major (big) pipelines can be stopped by usage of one ore more big valves. Also used to divide a long pipeline into shorter segments. For a single valve on a pipeline, use pipeline=valve on the appropriate node on the pipeline.
valve_group An area on the ground containing a number of valves. For a building, use substation=distribution or substation=valve
inspection_gauge An area on the ground whose only feature is a sender/receiver for a pipeline inspection gauge. If a substation of a different kind also features an inspection gauge, use pipeline:inspection_gauge=yes
field_gathering A facility on an oil/gas field that receives the medium via smaller pipelines directly from the well. The purpose of this substation is to concentrate many smaller feeds into a single, larger one.