{"id":2257,"date":"2024-09-04T17:27:41","date_gmt":"2024-09-04T15:27:41","guid":{"rendered":"https:\/\/gezhi-tech.com\/?p=2257"},"modified":"2025-09-27T17:50:23","modified_gmt":"2025-09-27T15:50:23","slug":"clause-3-how-to-understand-the-definition-of-extra-low-voltage","status":"publish","type":"post","link":"https:\/\/gezhi-tech.com\/vi\/clause-3-how-to-understand-the-definition-of-extra-low-voltage\/","title":{"rendered":"Kho\u1ea3n 3 \u2013 C\u00e1ch hi\u1ec3u \u0111\u1ecbnh ngh\u0129a \u201c\u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p\u201d"},"content":{"rendered":"\u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p: \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c cung c\u1ea5p t\u1eeb ngu\u1ed3n b\u00ean trong thi\u1ebft b\u1ecb kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 50 V gi\u1eefa c\u00e1c d\u00e2y d\u1eabn v\u00e0 gi\u1eefa d\u00e2y d\u1eabn v\u1edbi \u0111\u1ea5t khi thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n \u1edf \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh
\n
\nTheo \u0111\u1ecbnh ngh\u0129a c\u1ee7a Ch\u1ec9 th\u1ecb \u0111i\u1ec7n \u00e1p th\u1ea5p c\u1ee7a EU, \u0111i\u1ec7n \u00e1p th\u1ea5p n\u1eb1m trong kho\u1ea3ng t\u1eeb 50-1000V \u0111\u1ed1i v\u1edbi AC v\u00e0 75-1500V \u0111\u1ed1i v\u1edbi DC. Nh\u00e2n ti\u1ec7n, h\u1ea7u h\u1ebft c\u00e1c n\u01b0\u1edbc \u0111\u1ec1u chia \u0111i\u1ec7n \u00e1p cao v\u00e0 th\u1ea5p theo gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p n\u00e0y. Do \u0111\u00f3, \u0111i\u1ec7n \u00e1p tr\u00ean gi\u1edbi h\u1ea1n tr\u00ean c\u1ee7a d\u1ea3i l\u00e0 \u0111i\u1ec7n \u00e1p cao v\u00e0 \u0111i\u1ec7n \u00e1p d\u01b0\u1edbi gi\u1edbi h\u1ea1n d\u01b0\u1edbi c\u1ee7a d\u1ea3i l\u00e0 \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p. \u0110\u1ecbnh ngh\u0129a \u1edf \u0111\u00e2y trong ti\u00eau chu\u1ea9n kh\u00f4ng ph\u00e2n bi\u1ec7t gi\u1eefa DC v\u00e0 AC. Xin l\u01b0u \u00fd r\u1eb1ng \u1edf \u0111\u00e2y ch\u1ec9 c\u00f3 t\u00ean \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p v\u00e0 n\u00f3 kh\u00f4ng x\u00e1c \u0111\u1ecbnh m\u1ed9t ph\u1ea7n nh\u1ea5t \u0111\u1ecbnh c\u1ee7a m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p. V\u00ec \u0111i\u1ec7n \u00e1p c\u00f3 t\u00ednh t\u01b0\u01a1ng \u0111\u1ed1i n\u00ean khi \u0111o \u0111i\u1ec7n \u00e1p ph\u1ea3i \u0111o \u0111i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u, t\u1ee9c l\u00e0 \u0111i\u1ec7n \u00e1p c\u1ea7n c\u00f3 \u0111i\u1ec3m quy chi\u1ebfu n\u00ean ti\u00eau chu\u1ea9n \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111i\u1ec7n \u00e1p gi\u1eefa c\u00e1c d\u00e2y d\u1eabn v\u00e0 gi\u1eefa d\u00e2y d\u1eabn v\u1edbi \u0111\u1ea5t.
\n
\n\u0110i\u1ec7n \u00e1p \u0111\u1ea7u ra c\u1ee7a pin ki\u1ec1m gia d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, \u0111i\u1ec7n \u00e1p l\u00e0m vi\u1ec7c c\u1ee7a m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p sau m\u00e1y bi\u1ebfn \u00e1p ho\u1eb7c m\u1ea1ch gi\u1ea3m \u00e1p RC tr\u00ean b\u1ea3ng m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n c\u1ee7a thi\u1ebft b\u1ecb gia d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p .
\n
\nNh\u01b0 th\u1ec3 hi\u1ec7n trong h\u00ecnh b\u00ean d\u01b0\u1edbi, R1 v\u00e0 C1 ho\u00e0n th\u00e0nh ch\u1ee9c n\u0103ng gi\u1ea3m \u0111i\u1ec7n \u00e1p, do \u0111\u00f3 m\u1ea1ch theo R1 v\u00e0 C1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ea1ch \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p.
\n

\n\"\"
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\u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p: \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c cung c\u1ea5p t\u1eeb ngu\u1ed3n b\u00ean trong thi\u1ebft b\u1ecb kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 50 V gi\u1eefa c\u00e1c d\u00e2y d\u1eabn v\u00e0 gi\u1eefa d\u00e2y d\u1eabn v\u1edbi \u0111\u1ea5t khi thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n \u1edf \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh Theo \u0111\u1ecbnh ngh\u0129a c\u1ee7a Ch\u1ec9 th\u1ecb \u0111i\u1ec7n \u00e1p th\u1ea5p c\u1ee7a EU, \u0111i\u1ec7n \u00e1p th\u1ea5p…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[5],"tags":[159,89],"class_list":["post-2257","post","type-post","status-publish","format-standard","hentry","category-terms-and-definitions","tag-earthing","tag-voltage-supplied-from-a-source-within-the-appliance-that-does-not-exceed-50-v-between-conductors-and-between-conductors-and-earth-or-functional-earth-when-the-appliance-is-supplied-at-rated-voltage"],"translation":{"provider":"WPGlobus","version":"3.0.1","language":"vi","enabled_languages":["en","es","ar","de","ja","fr","ru","th","nl","it","fa","ko","pt","hi","ro","tr","vi","id","zu"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"es":{"title":true,"content":true,"excerpt":false},"ar":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"th":{"title":true,"content":true,"excerpt":false},"nl":{"title":true,"content":true,"excerpt":false},"it":{"title":true,"content":true,"excerpt":false},"fa":{"title":true,"content":true,"excerpt":false},"ko":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"hi":{"title":true,"content":true,"excerpt":false},"ro":{"title":true,"content":true,"excerpt":false},"tr":{"title":true,"content":true,"excerpt":false},"vi":{"title":true,"content":true,"excerpt":false},"id":{"title":true,"content":true,"excerpt":false},"zu":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/2257","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/comments?post=2257"}],"version-history":[{"count":20,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/2257\/revisions"}],"predecessor-version":[{"id":2280,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/2257\/revisions\/2280"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/media?parent=2257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/categories?post=2257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/tags?post=2257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}