NOVELTY - The cable installation comprises a support structure (2) such as a rod that is hinged to a base structure (3) about a first axis. A rotatable deviating roller (9, 10) is provided at each end of the support structure for a continuous transmitting element such as a cable (6) that is fixed at one end to an area of the base structure while the other end of the continuous element is fixed to an area of the base structure. The continuous element is wound or unwound on a winch (11) between the deviating rollers. The winch comprises a drum comprising a body that tapers towards the ends of the drum.    USE - The cable installation is useful for pivoting a support structure for photovoltaic modules or comparable devices such as solar thermal concentrators or solar panels.    ADVANTAGE - The cable installation is capable of safely pivoting the support structure for the photovoltaic modules in a stable manner thus preventing damage of the modules occurred by forces caused by wind torques, and can be economically and simply manufactured.    DETAILED DESCRIPTION - The cable installation comprises a support structure (2) such as a rod that is hinged to a base structure (3) about a first axis. A rotatable deviating roller (9, 10) is provided at each end of the support structure for a continuous transmitting element such as a cable (6) that is fixed at one end to an area of the base structure while the other end of the continuous element is fixed to an area of the base structure. The continuous element is wound or unwound on a winch (11) between the deviating rollers. The winch comprises a drum comprising a body that tapers towards the ends of the drum and has helicoidal, cable hold ribs. The variable ratio between the winding or unwinding cable to the winch is achieved by the drum, which has the cable hold ribs, where the rib diameter for the cable is adapted according to the formed ratios that occur in every position between the winding and unwinding of the continuous transmitting element. A continuous cable winding, by which the drum winch is executed, pulls away a spring-loaded tensioning roller from the cable drum, where changes in the total length of the cable during the cable ring adjustment is compensated or the entire cable system has specified tension within it. The continuous element consists of two parts, each of which fastens its ends to the drum.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a structure of a photovoltaic module.    Support structure (2)    Cable (6)    Winch (11)    Base structure (3)    Deviating roller. (9, 10)