Welding assembly for welding two rails of a track

A welding assembly for welding two rails of a track, comprising:

• two rail clamping units;
• a plurality of displacement drives, wherein said two rail clamping units are movable towards one another in the assembly in a longitudinal direction by means of said displacement drives,
• a drive,
• a power line;
• a power rail configured to transport electrical energy;
• a power supply;
• a plurality of clamping jaws, wherein each rail clamping unit has clamping jaws designed to be applied to a corresponding rail in pairs by means of said drive, wherein the clamping jaws provided for power transmission are connected—with regard to one of the two rail clamping units—by said power line to power rail contacts which are designed to be applied to said power rail by means of a fixing drive and is displaceable relative thereto,
• comprising the following features:
• a) the power rail is configured as an assembly guide, extending in the assembly longitudinal direction, which is spaced from the displacement drives and connects said two rail clamping units to one another,
• b) the power rail is displaceable in the assembly longitudinal direction relative to at least one rail clamping unit of said two rail clamping units which is equipped with the power conductor rail contacts;
• the power rail is powered by the power supply, wherein the power supply is coupled to the power rail;
• wherein two of the power rail contacts are arranged on a common contact carriage and designed to be applied to the power rail by means of the xxx fixing drive.