HIGH VOLTAGE SWIVEL

The invention relates to a high voltage swivel, comprising an annular oute r element defining a cylindrical chamber around a longitudinal axis and an inn er cylindrical element coaxial with the outer element and rotatable relative to said outer element around said longitudinal axis. The inner and outer elements each comprise at least two axially spaced electrical conductors which conductors are rotatabl e with the inner and outer elements, the conductors forming at least two pairs placed with contact surfaces in mutual electrical contact. One conductor in each pair is provide d at the inner element, the other at the outer element and being connected to a respective voltage line which extends to an input terminal and to an output terminal respectively, t he conductors being surrounded by an insulating material. The invention is characterised in that the electrical conductors, of the outer element are provided in a recess in an annular solid outer insulating ring, the electrical conductors of the inner element are provided in a recess in an annular solid inner insulating ring, coaxial, wit h the outer ring, the inner and outer insulating faces of the rings being placed in clos e proximity, the electrical conductors being placed with their contact surfaces at or nea r the boundary surface.