{"id":142,"date":"2024-11-21T07:18:00","date_gmt":"2024-11-21T07:18:00","guid":{"rendered":"http:\/\/43.135.160.122\/?p=142"},"modified":"2025-04-24T02:16:06","modified_gmt":"2025-04-24T02:16:06","slug":"difference-between-vlf-tester-and-dc-hipot-tester","status":"publish","type":"post","link":"https:\/\/www.voltage-tester.com\/vi\/difference-between-vlf-tester-and-dc-hipot-tester-article\/","title":{"rendered":"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u00e1y ki\u1ec3m tra VLF v\u00e0 m\u00e1y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p cao DC"},"content":{"rendered":"

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u00e1y ki\u1ec3m tra VLF v\u00e0 m\u00e1y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p cao DC:<\/strong><\/p>\n\n\n\n

C\u1ea3 hai M\u00e1y ki\u1ec3m tra VLF<\/strong> v\u00e0 M\u00e1y th\u1eed \u0111i\u1ec7n \u00e1p cao DC<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a l\u1edbp c\u00e1ch \u0111i\u1ec7n tr\u00ean c\u00e1p v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec7n, nh\u01b0ng ch\u00fang ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean l\u00fd kh\u00e1c nhau v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa hai lo\u1ea1i n\u00e0y:<\/p>\n\n\n\n

1. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng:<\/strong><\/p>\n\n\n\n

M\u00e1y ki\u1ec3m tra t\u1ea7n s\u1ed1 c\u1ef1c th\u1ea5p (VLF):<\/strong><\/p>\n\n\n\n

1. M\u00e1y ki\u1ec3m tra VLF \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u t\u1ea7n s\u1ed1 th\u1ea5p (th\u01b0\u1eddng trong kho\u1ea3ng t\u1eeb 0,1 Hz \u0111\u1ebfn 0,1 kHz) v\u00e0o c\u00e1p ho\u1eb7c thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

2. D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u t\u1ea7n s\u1ed1 th\u1ea5p m\u00f4 ph\u1ecfng \u0111i\u1ec1u ki\u1ec7n \u0111i\u1ec7n \u00e1p t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111i\u1ec1u ki\u1ec7n m\u00e0 c\u00e1p s\u1ebd g\u1eb7p ph\u1ea3i trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, nh\u01b0ng \u1edf t\u1ea7n s\u1ed1 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ti\u00eau chu\u1ea9n (50\/60 Hz).
3. \u01afu \u0111i\u1ec3m c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng VLF l\u00e0 cho ph\u00e9p ki\u1ec3m tra c\u00e1c \u0111o\u1ea1n c\u00e1p d\u00e0i v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng quy m\u00f4 l\u1edbn v\u1edbi m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 hi\u1ec7u \u1ee9ng sinh nhi\u1ec7t th\u1ea5p h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra t\u1ea7n s\u1ed1 cao ho\u1eb7c ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.<\/p>\n\n\n\n

M\u00e1y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p cao DC (High Potential Tester):<\/strong><\/p>\n\n\n\n

1. M\u00e1y th\u1eed HiPot d\u00f2ng m\u1ed9t chi\u1ec1u (DC) \u00e1p d\u1ee5ng m\u1ed9t \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u cao (th\u01b0\u1eddng trong kho\u1ea3ng t\u1eeb 5 kV \u0111\u1ebfn 100 kV ho\u1eb7c cao h\u01a1n) l\u00ean c\u00e1p ho\u1eb7c thi\u1ebft b\u1ecb.
2. Th\u1eed nghi\u1ec7m n\u00e0y t\u1ea1o \u00e1p l\u1ef1c l\u00ean l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u cao, nh\u1eb1m m\u00f4 ph\u1ecfng t\u00ecnh hu\u1ed1ng x\u1ea5u nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m y\u1ebfu ho\u1eb7c s\u1ef1 c\u1ed1 c\u1ee7a l\u1edbp c\u00e1ch \u0111i\u1ec7n trong \u0111i\u1ec1u ki\u1ec7n \u0111i\u1ec7n \u00e1p cao.
3. Th\u1eed nghi\u1ec7m d\u00f2ng m\u1ed9t chi\u1ec1u th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c s\u1ef1 c\u1ed1 c\u00e1ch \u0111i\u1ec7n c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c khi ch\u1ecbu \u00e1p l\u1ef1c \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u li\u00ean t\u1ee5c.<\/p>\n\n\n\n

2. Th\u1eddi l\u01b0\u1ee3ng v\u00e0 ph\u1ea1m vi \u00e1p d\u1ee5ng c\u1ee7a b\u00e0i ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n

M\u00e1y ki\u1ec3m tra VLF:<\/strong><\/p>\n\n\n\n

1. Th\u1eed nghi\u1ec7m VLF th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c th\u1eed nghi\u1ec7m li\u00ean t\u1ee5c, k\u00e9o d\u00e0i. C\u00e1c th\u1eed nghi\u1ec7m n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong v\u00e0i ph\u00fat (\u0111\u00f4i khi t\u1eeb 15 ph\u00fat \u0111\u1ebfn 1 gi\u1edd) v\u00e0 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ecnh tr\u1ea1ng chung c\u1ee7a c\u00e1c lo\u1ea1i c\u00e1p trung v\u00e0 cao \u00e1p, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1p ng\u1ea7m.
2. Ki\u1ec3m tra VLF \u00edt x\u00e2m l\u1ea5n h\u01a1n so v\u1edbi ki\u1ec3m tra DC, v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 ho\u1eb7c b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c \u0111\u1ecba.<\/p>\n\n\n\n

 M\u00e1y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p cao DC:<\/strong><\/p>\n\n\n\n

1. Th\u1eed nghi\u1ec7m Hipot d\u00f2ng m\u1ed9t chi\u1ec1u (DC) th\u01b0\u1eddng l\u00e0 m\u1ed9t th\u1eed nghi\u1ec7m c\u00f3 th\u1eddi gian ng\u1eafn (th\u01b0\u1eddng t\u1eeb 1 \u0111\u1ebfn 5 ph\u00fat). Th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o t\u1ea3i l\u00ean h\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n v\u00e0 \u0111\u00e1nh gi\u00e1 xem c\u00f3 b\u1ea5t k\u1ef3 \u0111i\u1ec3m y\u1ebfu n\u00e0o c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 hay kh\u00f4ng.<\/p>\n\n\n\n

2. C\u00e1c th\u1eed nghi\u1ec7m d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) th\u01b0\u1eddng g\u00e2y \u00e1p l\u1ef1c l\u1edbn h\u01a1n l\u00ean l\u1edbp c\u00e1ch \u0111i\u1ec7n so v\u1edbi th\u1eed nghi\u1ec7m t\u1ea7n s\u1ed1 r\u1ea5t th\u1ea5p (VLF), v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c m\u1ee5c \u0111\u00edch th\u1eed nghi\u1ec7m lo\u1ea1i, \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng ho\u1eb7c ki\u1ec3m tra ng\u1eabu nhi\u00ean \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m y\u1ebfu trong l\u1edbp c\u00e1ch \u0111i\u1ec7n. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m vi\u1ec7c th\u1eed nghi\u1ec7m c\u00e1p, m\u00e1y bi\u1ebfn \u00e1p, \u0111\u1ed9ng c\u01a1 v\u00e0 c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n kh\u00e1c.<\/p>\n\n\n\n

 \u01afu \u0111i\u1ec3m c\u1ee7a m\u00e1y ki\u1ec3m tra VLF:<\/strong><\/p>\n\n\n\n

1. Ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng \u00edt h\u01a1n so v\u1edbi th\u1eed nghi\u1ec7m d\u00f2ng m\u1ed9t chi\u1ec1u.
2. Ph\u00f9 h\u1ee3p h\u01a1n \u0111\u1ec3 ki\u1ec3m tra c\u00e1c \u0111o\u1ea1n c\u00e1p d\u00e0i do y\u00eau c\u1ea7u c\u00f4ng su\u1ea5t th\u1ea5p h\u01a1n.
3. C\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed.<\/p>\n\n\n\n

\u01afu \u0111i\u1ec3m c\u1ee7a m\u00e1y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p cao DC:<\/strong><\/p>\n\n\n\n

1. G\u00e2y \u00e1p l\u1ef1c l\u1edbn h\u01a1n l\u00ean l\u1edbp c\u00e1ch nhi\u1ec7t, t\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 b\u1ed9c l\u1ed9 nh\u1eefng \u0111i\u1ec3m y\u1ebfu m\u00e0 trong \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng c\u00f3 th\u1ec3 kh\u00f4ng xu\u1ea5t hi\u1ec7n.
2. Ki\u1ec3m tra b\u1eb1ng \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t h\u01a1n, th\u01b0\u1eddng gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng c\u00e1ch \u0111i\u1ec7n.<\/p>","protected":false},"excerpt":{"rendered":"

the difference between VLF tester and dc hipot tester: Both VLF testers and DC HiPot testers are used to assess the insulation integrity of electrical cables and equipment, but they operate using different principles and are suited for different applications. Here’s a breakdown of the key differences between the two: 1. Operating Principle: VLF Tester (Very Low Frequency Tester): […]<\/p>","protected":false},"author":1,"featured_media":143,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[772],"tags":[],"class_list":["post-142","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"\nDifference between VLF tester and DC hipot tester - Run Test<\/title>\n<meta name=\"description\" content=\"China transformer test supplier, we provide Relay Protection Test, Resistance test, Circuit Breaker Test, and Partial Discharge Test for you with good price.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.voltage-tester.com\/vi\/difference-between-vlf-tester-and-dc-hipot-tester-article\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Difference between VLF tester and DC hipot tester - 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