Three-phase conductor

摘要

The invention relates to a three-phase conductor having four metallic and intermediately located tubes, which are located concentrically around one another and consist of insulating material. The three phases and the neutral conductor are connected to the metallic tubes. As a result of its geometric symmetry, the three-phase conductor has no external magnetic field. It is thus preferably laid where no magnetic interference fields may occur. As a consequence of the low current displacement in the conductor tubes, which is likewise a consequence of the rotationally symmetrical structural shape, the three-phase conductor is distinguished by particularly low energy-transmission losses. A magnetic field occurs only inside the conductor cross-section which, in comparison with conventional structures, leads to a considerable reduction in the conductor inductance and hence to a reduction in the voltage drop along the conductor. A coolant for recovering the energy-transmission losses can be passed through the cavity which is surrounded by the inner tube.