{"id":170,"date":"2022-09-14T08:44:00","date_gmt":"2022-09-14T08:44:00","guid":{"rendered":"https:\/\/www.voltage-tester.com\/?p=170"},"modified":"2025-04-24T02:16:22","modified_gmt":"2025-04-24T02:16:22","slug":"what-is-a-vlf-electrical-test","status":"publish","type":"post","link":"https:\/\/www.voltage-tester.com\/fr\/what-is-a-vlf-electrical-test-article\/","title":{"rendered":"Qu'est-ce qu'un test \u00e9lectrique VLF ?"},"content":{"rendered":"

Tr\u00e8s basse fr\u00e9quence (VLF)<\/strong>\u00a0Le test de diagnostic est l'application d'une forme d'onde sinuso\u00efdale en courant alternatif, g\u00e9n\u00e9ralement appliqu\u00e9e \u00e0 0,1 Hz ou moins, pour \u00e9valuer la qualit\u00e9 de l'isolation \u00e9lectrique dans les charges capacitives \u00e9lev\u00e9es, telles que les c\u00e2bles.
L'essai \u00e0 tr\u00e8s basse fr\u00e9quence pour les c\u00e2bles \u00e0 moyenne et haute tension est une m\u00e9thode permettant de v\u00e9rifier l'int\u00e9grit\u00e9 de l'isolation du c\u00e2ble. Le test VLF est un test de r\u00e9sistance g\u00e9n\u00e9ralement effectu\u00e9 \u00e0 une fr\u00e9quence comprise entre 0,1 Hz et 0,01 Hz plut\u00f4t qu'\u00e0 une fr\u00e9quence de 50\/60 Hz.<\/p>\n\n\n\n

\"Qu'est-ce<\/figure>\n\n\n\n
\"Qu'est-ce<\/figure>","protected":false},"excerpt":{"rendered":"

Very low frequency (VLF)\u00a0diagnostic testing is the application of an AC sinusoidal waveform, generally applied at 0.1 Hz or lower, to assess the quality of electrical insulation in high capacitive loads, such as cables.Very Low Frequency testing for Medium Voltage and High Voltage cables is a method for verifying the integrity of the cable insulation. 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