The transmission line comprises a live conductor (122) and a return conductor, and the live conductor (122) is terminated by a direct connection to the return conductor.

Three damping circuits (8) are connected between the return conductor (10) and the reference conductor.

Three damping circuits (8) are connected between the return conductor (10) and the reference conductor (7).

An alternating current traction power supply system comprises a supply conductor (C), a return conductor (O), a positive feeder conductor (P) and a negative feeder conductor (N).

The cable core can advantageously be a concentric configuration of a forward conductor and return conductor.

Application to butt-joining of the outer return wire of telecommunication submarine cables.

The electrical supply line (102) has at least one forward-feed conductor (14, 14') and at least one return conductor (26, 26').

A first cross-sectional area of the first conductor (C) is less than a second cross-sectional area of the return and shielding conductor (R, G).

The return conductor, positive feeder conductor and negative feeder conductor are all connected to a winding of each of a plurality of autotransformers (1) provided at intervals along said conductors.

In particular, the thus freely selectable distance of the current return conductor from the glass tube allows a flexible arrangement of the current return conductor and a reflector, for example.

A current return conductor extends between an end terminal connector and the power supply.

The core does not form a magnetic path loop around the ground return conductor.

The core does not form a magnetic path loop around the ground return conductor.

One return conductor (13) is connected to the ground terminal (12) of the control circuit (3).

The metallic structure must not be used as a current carrying conductor.