So-called high voltage method for testing components with elimination of the leakage currents and device suitable therefor

摘要

High tension integrity testing of an electrical insulator includes making a controlled discharge between a high voltage electrode (9) and a second electrode (11) at a variable voltage on opposite sides of a test zone of the insulator. Auxiliary electrode(s) (15) at the zone periphery are shaped and charged to produce escape currents at the zone periphery with minimal effect on the charge in the test zone An Independent claim is included for an apparatus to perform the above test. Preferred Features: The shape of the main electrodes (9,11) are changed depending on the item under test. To test the integrity of a hollow cylindrical insulator, the high voltage electrode has a point, the second electrode is beneath the insulator and the auxiliary electrode is annular with a flat lower edge (17). This edge is wider than the corresponding edge of the insulator.