Compensated Longitudinal Chain:A lo

Compensated Longitudinal Chain:A longitudinal chain design in which the longitudinal wire and the overhead line are retracted Tensioning can be done with a common tensioner or is separatelySpecial operating condition:condition caused by one of the insulation breaks in the double suspension insulation of the overhead power line.Bypass:A power supply line connecting an open-ended overhead line network that bridges the station circuits and feeds the station circuits through junctions.Overhead contact line:part of the overhead contact line directly to the pantograph of the electric traction unit.Nominal Illumination:The illumination value required to provide a particular lighting installation.Normal operating state:Power line overhead condition compliant with installation conditions.Emergency lighting:lighting for personal and property protection.Disconnector:A switching device that is designed to connect or disconnect overhead lines in an unloaded state.Section insulator:An insulator with mechanical guide rails built into the overhead contact line, which electrically separates two circuits, but allows unimpeded passage of the electric traction current collector.Bracket:a structure made up of tubes, insulators and other elements for the unique support of the overhead longitudinal chain mounted on the support column.Power line:line to reduce the impedance of the overhead contact line system of a single track electromagnetic line.Spatial uniformity:ratio of minimum to average illumination and average to maximum illumination in a given area(e 1, e 2).Operational Lighting:Artificial lighting designed to provide rated illumination value in case of insufficient natural lighting.Operational Safety Level of Electricity Supply:The railway power supply can be of "A", "B" or "C" level(where "A" is the most stringent, "C" is the lighter).Electric overhead contact line:transmits electrical power for high-speed traction to electric traction unit axles.All the bases, columns, wires and other related equipment.Line Sectioning:A line of two tensioning sections(1500m)on the line, constructed in such a way that the two longitudinal chains are mechanically separated but resilient by electrical connection and metallic connection.Railway signaling and safety installationsAutomated marshalling yard(from an interlocking point of view):control of all track brakes and setting of rolling track is automated, window-free train assembly on directional tracks solved with additional equipment besides target braking.Reception and departure tracks(groups of tracks)equipped with interlocking device.If one of the conditions is not met, the marshalling yard is partiall