This leaflet contains requirements and recommendations to ensure reliable interaction between pantograph and a.c. overhead equipment at speeds of over 200 km/h. The recommendations contained in the leaflet are in line with the state of the art and reflect the experience gained by the railways in high-speed Rail transport whilst ensuring reliability and cost-effectiveness. Account has been taken of the stipulations laid down for international traffic in the Technical Specifications for Interoperability (TSI). Pantographs with a bow profile corresponding to that defined in UIC Leaflet 794 can be used in conjunction with the overhead contact systems defined in this leaflet.