Abstract: The present invention relates to a method for testing a conductor element (20) applicable to locating a continuity defect of the conductor element, the conductor element having, relative to a reference conductor, an insulation resistance and a leak capacitance. According to the present invention, the method comprises a step of injecting into the conductor element at least two currents (i1, i2) of different frequencies by means of a current or voltage generator (23), one terminal of which is connected to the reference conductor, at least one step of measuring the amplitudes of currents at one measuring point (Pi) chosen along the conductor element, and a step of calculating the imaginary part of currents and/or calculating the leak capacitance of the conductor element downstream from the measuring point (P1).

Abstract: Method for locating an insulation fault (Rd) in the screen (SCR) of a cable relative to the ground, the screen being electrically accessible at least at one point of origin (Po) and at one terminal point (Pe). A current is injected between the point of origin (Po) and the terminal point (Pe) of the screen (SCR), by a current or voltage generator (21) that is insulated from the ground, a first electric voltage (U1) is measured at the point of origin (Po), in reference to the ground, and a second electric voltage (U, U2) is measured at the terminal point (Pe). The ratio between the first (U1) and the second (U, U2) voltages measured is representative of the relative position (Pdr) of the insulation fault between the point of origin (Po) and the terminal point (Pe).

Abstract: The present invention relates to a method for measuring the electrical characteristics of a telecommunication cable (10) comprising a bundle of electric wires (11) conveying a service voltage (U) delivered by equipment (15) referenced to ground, arranged in an insulating sheath comprising a conductive screen (12). According to the present invention, the method comprises one step of measuring the insulation resistance (Riso) of the screen (12) relative to the ground, one step of measuring the electric potential (Pe) of the screen (12) relative to the ground, and one step of determining a global insulation resistance (Ri) of the bundle of electric wires (11) relative to the conductive screen (12), using the result of the measurements of the insulation resistance (Riso) and of the electric potential (Pe) of the screen. Application to characterising or to maintaining telecommunication cables.

Abstract: The present invention relates to a method for testing a conductor element (20) applicable to locating, a continuity defect of the conductor element, the conductor element having, relative to a reference conductor, an insulation resistance and a leak capacitance. According to the present invention, the method comprises a step of injecting into the conductor element at least two currents (i1, i2) of different frequencies by means of a current or voltage generator (23), one terminal of which is connected to the reference conductor, at least one step of measuring the amplitudes of currents at one measuring point (Pi) chosen along the conductor element, and a step of calculating the imaginary part of currents and/or calculating the leak capacitance of the conductor element downstream from the measuring point (P1).

Abstract: The present invention relates to a method for locating an insulation fault (Rd) in a conductor element (SCR) relative to the ground, the conductor element being electrically accessible at least at one point of origin (Po) and at one terminal point (Pe). According to the present invention, a current is injected between the point of origin (Po) and the terminal point (Pe) of the conductor element (SCR), by means of a current or voltage generator (21) that is insulated from the ground, a first electric voltage (U1) is measured at the point of origin (Po), in reference to the ground, and a second electric voltage (U, U2) is measured at the terminal point (Pe). The ratio between the first (U1) and the second (U, U2) voltages measured is representative of the relative position (Pdr) of the insulation fault between the point of origin (Po) and the terminal point (Po). Application in the maintenance of telecommunication cables in particular.

Abstract: Device for verifying the tightness of a network of cables with metal sheathing or metal part. This device comprises a central measurement unit (UC) connected to rack units (UBo1, UB2) controlling the assemblies of cables of the network (C1, C2) to which they are connected via terminal boards. The assemblies are disconnected from ground at the head of the network of the assembly of cables (C1, C2) and the insulation resistance with respect to ground of this assembly of cables is measured. The resistance is compared with an adjustable standard resistance. The electrochemical couple generated by a lack of tightness, which is associated with an alarm is also measured. The rack unit (UBo1) at the head of the network is associated with at least one rack unit (UBe1) located at the end of the cable or assembly of cables (C1) in which signals are detected and analyzed.