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\n\u1ede \u0111\u00e2y c\u1ea7n n\u00f3i th\u00eam r\u1eb1ng SELV c\u00f3 quy \u0111\u1ecbnh v\u1ec1 gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p. \u0110i\u1ec7n \u00e1p quy \u0111\u1ecbnh \u1edf \u0111\u00e2y l\u00e0 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a \u0111i\u1ec7n \u00e1p. Th\u00f4ng th\u01b0\u1eddng, gi\u00e1 tr\u1ecb \u0111\u1ec9nh c\u1ee7a \u0111i\u1ec7n \u00e1p cao h\u01a1n gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng v\u00e0 gi\u1edbi h\u1ea1n \u0111i\u1ec7n \u00e1p quy \u0111\u1ecbnh t\u1ea1i kho\u1ea3n 8.1.4 l\u00e0 y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi gi\u00e1 tr\u1ecb \u0111\u1ec9nh. Ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft c\u00e1c y\u00eau c\u1ea7u ki\u1ec3m tra c\u1ee7a n\u00f3 trong \u0111i\u1ec1u 8.1.4. L\u01b0u \u00fd 2 c\u1ee7a \u0111o\u1ea1n \u0111\u1ea7u ti\u00ean trong \u0110i\u1ec1u 3 \u0111\u01b0a ra c\u00e2u “L\u01afU \u00dd 2 Khi s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef \u201c\u0111i\u1ec7n \u00e1p\u201d v\u00e0 \u201cd\u00f2ng \u0111i\u1ec7n\u201d, ch\u00fang l\u00e0 gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng, tr\u1eeb khi c\u00f3 quy \u0111\u1ecbnh kh\u00e1c.”
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\nNh\u01b0 h\u00ecnh b\u00ean d\u01b0\u1edbi, m\u00e1y bi\u1ebfn \u00e1p c\u00f3 ba gi\u00e1 \u0111\u1ee1 nh\u1ef1a \u0111\u1eb7t th\u1eb3ng \u0111\u1ee9ng v\u00e0o \u0111\u0129a \u0111\u1ec3 ng\u0103n c\u00e1ch cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p (cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c qu\u1ea5n b\u1eb1ng b\u0103ng nh\u1ef1a m\u00e0u xanh \u1edf b\u00ean ngo\u00e0i), c\u00f2n cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c b\u1ecb c\u00f4 l\u1eadp v\u1ec1 m\u1eb7t v\u1eadt l\u00fd.
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![\"\"](\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/09\/transformer1.png\"){kind=spacer}
\n<\/figure>
\nNh\u01b0 th\u1ec3 hi\u1ec7n trong h\u00ecnh b\u00ean d\u01b0\u1edbi, m\u00e1y bi\u1ebfn \u00e1p c\u00f3 b\u0103ng m\u00e0u v\u00e0ng qu\u1ea5n quanh cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p \u1edf gi\u1eefa. Ch\u00fang ta c\u1ea7n \u0111\u1eb7c bi\u1ec7t ch\u00fa \u00fd \u0111\u1ebfn kho\u1ea3ng c\u00e1ch r\u00f2 r\u1ec9 c\u1ee7a gi\u00e1 \u0111\u1ee1 m\u00e0u \u0111en gi\u1eefa hai cu\u1ed9n d\u00e2y \u0111\u1ec3 xem li\u1ec7u n\u00f3 c\u00f3 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u v\u1ec1 kho\u1ea3ng c\u00e1ch r\u00f2 r\u1ec9 \u0111\u1ed1i v\u1edbi c\u00e1ch \u0111i\u1ec7n t\u0103ng c\u01b0\u1eddng hay kh\u00f4ng. N\u1ebfu kh\u00f4ng th\u00ec m\u00e1y bi\u1ebfn \u00e1p kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 m\u00e1y bi\u1ebfn \u00e1p c\u00e1ch ly an to\u00e0n.
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![\"\"](\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/09\/transformer.png\"){kind=spacer}
\n<\/figure>
\nCh\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 c\u1ea5u t\u1ea1o c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p c\u00e1ch ly an to\u00e0n \u1edf b\u00e0i sau.
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\u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n: \u0111i\u1ec7n \u00e1p kh\u00f4ng qu\u00e1 42 V gi\u1eefa d\u00e2y d\u1eabn v\u00e0 gi\u1eefa d\u00e2y d\u1eabn v\u1edbi \u0111\u1ea5t, \u0111i\u1ec7n \u00e1p kh\u00f4ng t\u1ea3i kh\u00f4ng qu\u00e1 50 V Khi l\u1ea5y \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n t\u1eeb ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi th\u00ec ph\u1ea3i th\u00f4ng qua c\u00e1ch ly an to\u00e0n m\u00e1y bi\u1ebfn \u00e1p ho\u1eb7c b\u1ed9 chuy\u1ec3n…<\/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":[167,74,76,89,77,90,91,163,75],"class_list":["post-2282","post","type-post","status-publish","format-standard","hentry","category-terms-and-definitions","tag-8-1-4","tag-insulation-applied-to-live-parts-to-provide-basic-protection-against-electric-shock","tag-insulation-system-comprising-both-basic-insulation-and-supplementary-insulation","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","tag-single-insulation-applied-to-live-parts-that-provides-a-degree-of-protection-against-electric-shock-equivalent-to-double-insulation-under-the-conditions-specified-in-this-standard","tag-voltage-not-exceeding-42-v-between-conductors-and-between-conductors-and-earth-or-functional-earth-the-no-load-voltage-not-exceeding-50-v","tag-transformer-the-input-winding-of-which-is-electrically-separated-from-the-output-winding-by-an-insulation-at-least-equivalent-to-double-insulation-or-reinforced-insulation-that-is-intended-to-supply","tag-selv","tag-independent-insulation-applied-in-addition-to-basic-insulation-in-order-to-provide-protection-against-electric-shock-in-the-event-of-a-failure-of-basic-insulation"],"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":false,"content":false,"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":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/2282","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=2282"}],"version-history":[{"count":20,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/2282\/revisions"}],"predecessor-version":[{"id":2355,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/2282\/revisions\/2355"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/media?parent=2282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/categories?post=2282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/tags?post=2282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}