{"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\/pt\/what-is-a-vlf-electrical-test-article\/","title":{"rendered":"O que \u00e9 um teste el\u00e9trico VLF?"},"content":{"rendered":"

Frequ\u00eancia muito baixa (VLF)<\/strong>\u00a0O ensaio de diagn\u00f3stico \u00e9 a aplica\u00e7\u00e3o de uma forma de onda sinusoidal CA, geralmente aplicada a 0,1 Hz ou menos, para avaliar a qualidade do isolamento el\u00e9trico em cargas altamente capacitivas, como os cabos.
O ensaio de muito baixa frequ\u00eancia para cabos de m\u00e9dia tens\u00e3o e alta tens\u00e3o \u00e9 um m\u00e9todo para verificar a integridade do isolamento do cabo. O ensaio VLF \u00e9 um ensaio de resist\u00eancia normalmente efectuado a uma frequ\u00eancia entre 0,1 Hz e 0,01 Hz, em vez de 50\/60 Hz.<\/p>\n\n\n\n

\"O<\/figure>\n\n\n\n
\"O<\/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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