{"id":577,"date":"2024-08-17T17:18:28","date_gmt":"2024-08-17T15:18:28","guid":{"rendered":"https:\/\/gezhi-tech.com\/?p=577"},"modified":"2025-09-27T17:50:23","modified_gmt":"2025-09-27T15:50:23","slug":"clause-3-how-to-understand-the-definition-of-class-iii-appliance","status":"publish","type":"post","link":"https:\/\/gezhi-tech.com\/vi\/clause-3-how-to-understand-the-definition-of-class-iii-appliance\/","title":{"rendered":"Kho\u1ea3n 3 \u2013 C\u00e1ch hi\u1ec3u \u0111\u1ecbnh ngh\u0129a \u201cthi\u1ebft b\u1ecb lo\u1ea1i III\u201d"},"content":{"rendered":"thi\u1ebft b\u1ecb c\u1ea5p III: thi\u1ebft b\u1ecb trong \u0111\u00f3 vi\u1ec7c b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt d\u1ef1a v\u00e0o ngu\u1ed3n \u0111i\u1ec7n \u1edf \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n v\u00e0 trong \u0111\u00f3 kh\u00f4ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p cao h\u01a1n \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n.
L\u01afU \u00dd C\u00e1ch \u0111i\u1ec7n c\u01a1 b\u1ea3n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u b\u1ed5 sung cho ngu\u1ed3n \u0111i\u1ec7n \u1edf SELV. Tham kh\u1ea3o 8.1.4.<\/em>
\n\u0110\u1ec3 hi\u1ec3u \u0111i\u1ec1u n\u00e0y, tr\u01b0\u1edbc ti\u00ean b\u1ea1n c\u1ea7n hi\u1ec3u \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n (SELV) l\u00e0 g\u00ec. Vui l\u00f2ng tham kh\u1ea3o \u0111\u1ecbnh ngh\u0129a v\u00e0 gi\u1ea3i th\u00edch v\u1ec1 SELV. Lo\u1ea1i s\u1ea3n ph\u1ea9m n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n b\u1eb1ng b\u1ed9 chuy\u1ec3n \u0111\u1ed5i, USB ho\u1eb7c ngu\u1ed3n \u0111i\u1ec7n \u00e1p th\u1ea5p trong \u00f4 t\u00f4. Lo\u1ea1i s\u1ea3n ph\u1ea9m n\u00e0y khi b\u00e1n ra s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c trang b\u1ecb thi\u1ebft b\u1ecb chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u 100-240V th\u00e0nh \u0111i\u1ec7n \u00e1p th\u1ea5p c\u1ea7n thi\u1ebft, v\u00ec n\u1ebfu \u0111\u01b0\u1ee3c trang b\u1ecb thi\u1ebft b\u1ecb chuy\u1ec3n \u0111\u1ed5i nh\u01b0 v\u1eady, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i th\u00ec b\u1ed9 chuy\u1ec3n \u0111\u1ed5i v\u00e0 thi\u1ebft b\u1ecb t\u1ea1o th\u00e0nh m\u1ed9t t\u1ed5ng th\u1ec3 v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7 c\u1ee7a to\u00e0n b\u1ed9 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi b\u1ed9 chuy\u1ec3n \u0111\u1ed5i. B\u1ed9 chuy\u1ec3n \u0111\u1ed5i th\u01b0\u1eddng c\u00f3 c\u1ea5u tr\u00fac c\u1ea5p II, v\u00ec v\u1eady b\u1ed9 chuy\u1ec3n \u0111\u1ed5i v\u00e0 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 thi\u1ebft b\u1ecb c\u1ea5p II. Do \u0111i\u1ec7n \u00e1p ngu\u1ed3n c\u1ee7a lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p n\u00ean \u0111\u00f4i khi d\u1eabn \u0111\u1ebfn kh\u00f4ng th\u1ec3 ho\u00e0n th\u00e0nh m\u1ed9t s\u1ed1 ch\u1ee9c n\u0103ng \u0111i\u1ec7n c\u1ee5 th\u1ec3 n\u00ean c\u1ea7n s\u1eed d\u1ee5ng m\u1ea1ch t\u0103ng \u00e1p \u0111\u1ec3 t\u0103ng \u0111i\u1ec7n \u00e1p nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 ch\u1ee9c n\u0103ng \u0111\u1eb7c bi\u1ec7t c\u1ee7a thi\u1ebft b\u1ecb. V\u00ed d\u1ee5, ch\u1ee9c n\u0103ng c\u1ee7a m\u00e1y t\u1ea1o ion \u00e2m y\u00eau c\u1ea7u ho\u1ea1t \u0111\u1ed9ng t\u0103ng c\u01b0\u1eddng. Lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y c\u00f3 b\u1ed9 t\u1ea1o ion \u00e2m t\u01b0\u01a1ng t\u1ef1 ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng t\u0103ng c\u01b0\u1eddng (gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p cao h\u01a1n SELV) kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 thi\u1ebft b\u1ecb Lo\u1ea1i III.
\n
\nT\u1eeb “an to\u00e0n” \u0111\u01b0\u1ee3c bao g\u1ed3m trong b\u1ed1n t\u1eeb “\u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n”, nh\u01b0ng \u0111i\u1ec1u n\u00e0y kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 SELV an to\u00e0n v\u00e0 kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i an to\u00e0n khi ch\u1ea1m tr\u1ef1c ti\u1ebfp. Ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ea1m tr\u1ef1c ti\u1ebfp v\u00e0o c\u00e1c m\u1ea1ch \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n 8.1.4. Ch\u00fang t\u00f4i s\u1ebd ph\u00e2n t\u00edch v\u00e0 gi\u1ea3i th\u00edch c\u1ee5 th\u1ec3 \u0111i\u1ec1u n\u00e0y khi ph\u00e2n t\u00edch kho\u1ea3n 8.1.4.
\n
\nQu\u1ea1t th\u1ec3 hi\u1ec7n trong h\u00ecnh b\u00ean d\u01b0\u1edbi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 thi\u1ebft b\u1ecb c\u1ea5p III. Tuy nhi\u00ean, chi\u1ebfc qu\u1ea1t n\u00e0y c\u00f3 hai tai n\u00ean n\u00f3 kh\u00f4ng tu\u00e2n th\u1ee7 \u0111i\u1ec1u 22.44. Ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft sau.
\n

\n\"\"
\n<\/figure>","protected":false},"excerpt":{"rendered":"

thi\u1ebft b\u1ecb c\u1ea5p III: thi\u1ebft b\u1ecb trong \u0111\u00f3 vi\u1ec7c b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt d\u1ef1a v\u00e0o ngu\u1ed3n \u0111i\u1ec7n \u1edf \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n v\u00e0 trong \u0111\u00f3 kh\u00f4ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p cao h\u01a1n \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n.L\u01afU \u00dd C\u00e1ch \u0111i\u1ec7n c\u01a1 b\u1ea3n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u b\u1ed5 sung cho ngu\u1ed3n…<\/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":[74,83,84,85,147,90,163],"class_list":["post-577","post","type-post","status-publish","format-standard","hentry","category-terms-and-definitions","tag-insulation-applied-to-live-parts-to-provide-basic-protection-against-electric-shock","tag-appliance-in-which-protection-against-electric-shock-does-not-rely-on-basic-insulation-only-but-in-which-additional-safety-precautions-are-provided-such-as-double-insulation-or-reinforced-insulation","tag-part-of-an-appliance-for-which-protection-against-electric-shock-relies-upon-double-insulation-or-reinforced-insulation","tag-appliance-in-which-protection-against-electric-shock-relies-on-supply-at-safety-extra-low-voltage-and-in-which-voltages-higher-than-those-of-safety-extra-low-voltage-are-not-generated","tag-protection-against-electric-shock","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-selv"],"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\/577","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=577"}],"version-history":[{"count":30,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/577\/revisions"}],"predecessor-version":[{"id":1994,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/577\/revisions\/1994"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/media?parent=577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/categories?post=577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/tags?post=577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}