G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/02 (2006.01) G01N 17/02 (2006.01)
Patent
CA 2058473
METHOD AND APPARATUS FOR CHECKING THE STATE OF ELECTRICAL INSULATION OF AN ELECTRICALLY CONDUCTING WORK ABSTRACT The invention relates to the checking of the state of electrical insulation of a conducting work (1) placed in an electrolytic medium (3) and connected to a reference electrode (11) in contact with this same medium. The proposed apparatus comprises means (15) of measuring the voltage between the work and the electrode, a generator (7) for establishing a DC current between the work and the anode piece, a clock (9) for interrupting and reestablishing the circulation of the said current and triggering measurements of this current and of the said voltage, processing means for calculating, for each current intensity, the potential difference between the said voltages measured without and with current circula- tion, and for calculating the ratio between this poten- tial difference and the corresponding measured intensity of the said current, and means of displaying the calcu- lated ratio. The invention applies to the field of the catho- dic protection of buried works.
Antony Philippe
Dauzat Dominique
Jouan Patrick
Lemarchand Jean-Yves
Adams Patent & Trademark Agency
Gaz de France
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