Division 2.3.1 Ability to operate on available traction supply systems
United Kingdom
As national railways are equipped with various electrification systems, electric trains shall be able to use the available voltage and frequency, and have the correct pantograph to handle the catenary geometry.
These requirements for traction supply are defined in the energy subsystem TSI.
Pantograph: despite being installed on rolling stock, the pantographs are considered to be a part of the Energy subsystem as an important device the proper current-collection function of which is directly linked to the characteristics of the overhead line. The interface characteristics of the pantographs are specified and described in the energy TSI.