{"id":525,"date":"2024-08-17T11:25:36","date_gmt":"2024-08-17T09:25:36","guid":{"rendered":"https:\/\/gezhi-tech.com\/?p=525"},"modified":"2025-09-27T17:50:23","modified_gmt":"2025-09-27T15:50:23","slug":"clause-3-how-to-understand-the-definition-of-class-ii-appliance","status":"publish","type":"post","link":"https:\/\/gezhi-tech.com\/vi\/clause-3-how-to-understand-the-definition-of-class-ii-appliance\/","title":{"rendered":"Kho\u1ea3n 3 \u2013 C\u00e1ch hi\u1ec3u \u0111\u1ecbnh ngh\u0129a \u201cthi\u1ebft b\u1ecb lo\u1ea1i II\u201d"},"content":{"rendered":"thi\u1ebft b\u1ecb c\u1ea5p II: thi\u1ebft b\u1ecb kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt c\u00e1ch nhi\u1ec7t c\u01a1 b\u1ea3n <\/strong>ch\u1ec9 nh\u01b0ng trong \u0111\u00f3 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba an to\u00e0n b\u1ed5 sung \u0111\u01b0\u1ee3c cung c\u1ea5p, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1ch nhi\u1ec7t k\u00e9p <\/strong>ho\u1eb7c c\u00e1ch nhi\u1ec7t t\u0103ng c\u01b0\u1eddng<\/strong>, kh\u00f4ng c\u00f3 quy \u0111\u1ecbnh n\u00e0o v\u1ec1 n\u1ed1i \u0111\u1ea5t b\u1ea3o v\u1ec7 ho\u1eb7c ph\u1ee5 thu\u1ed9c v\u00e0o \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t.
L\u01afU \u00dd 1 Thi\u1ebft b\u1ecb nh\u01b0 v\u1eady c\u00f3 th\u1ec3 thu\u1ed9c m\u1ed9t trong c\u00e1c lo\u1ea1i sau:
\u2013 m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 v\u1ecf b\u1ecdc b\u1ec1n v\u00e0 li\u00ean t\u1ee5c b\u1eb1ng v\u1eadt li\u1ec7u c\u00e1ch \u0111i\u1ec7n, bao b\u1ecdc t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn kim lo\u1ea1i, ngo\u1ea1i tr\u1eeb c\u00e1c b\u1ed9 ph\u1eadn, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ea3ng t\u00ean, \u1ed1c v\u00edt v\u00e0 \u0111inh t\u00e1n, \u0111\u01b0\u1ee3c c\u00e1ch ly v\u1edbi b\u1ed9 ph\u1eadn s\u1ed1ng <\/strong>b\u1eb1ng c\u00e1ch \u0111i\u1ec7n \u00edt nh\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1ch nhi\u1ec7t t\u0103ng c\u01b0\u1eddng<\/strong>; thi\u1ebft b\u1ecb nh\u01b0 v\u1eady \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 thi\u1ebft b\u1ecb c\u00e1ch nhi\u1ec7t thi\u1ebft b\u1ecb lo\u1ea1i II<\/strong>;
\u2013 m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 v\u1ecf kim lo\u1ea1i g\u1ea7n nh\u01b0 li\u00ean t\u1ee5c, trong \u0111\u00f3 c\u00e1ch nhi\u1ec7t k\u00e9p <\/strong>ho\u1eb7c c\u00e1ch nhi\u1ec7t t\u0103ng c\u01b0\u1eddng <\/strong>\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng xuy\u00ean su\u1ed1t; thi\u1ebft b\u1ecb nh\u01b0 v\u1eady \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 v\u1ecf b\u1ecdc kim lo\u1ea1i thi\u1ebft b\u1ecb lo\u1ea1i II<\/strong>;
\u2013 m\u1ed9t thi\u1ebft b\u1ecb l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a v\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n thi\u1ebft b\u1ecb lo\u1ea1i II <\/strong>v\u00e0 m\u1ed9t v\u1ecf kim lo\u1ea1i thi\u1ebft b\u1ecb lo\u1ea1i II<\/strong>.
CH\u00da TH\u00cdCH 2 V\u1ecf b\u1ecdc c\u00e1ch \u0111i\u1ec7n thi\u1ebft b\u1ecb lo\u1ea1i II <\/strong>c\u00f3 th\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t ph\u1ea7n ho\u1eb7c to\u00e0n b\u1ed9 c\u00e1ch nhi\u1ec7t b\u1ed5 sung <\/strong>ho\u1eb7c c\u1ee7a c\u00e1ch nhi\u1ec7t t\u0103ng c\u01b0\u1eddng<\/strong>.<\/em>
\n\u1ede \u0111\u00e2y ch\u00fang t\u00f4i ngh\u0129 t\u1eeb g\u00f3c \u0111\u1ed9 ph\u00f2ng ng\u1eeba k\u00e9p. Ngo\u00e0i l\u1edbp c\u00e1ch nhi\u1ec7t c\u01a1 b\u1ea3n, s\u1ea3n ph\u1ea9m c\u00f2n c\u1ea7n th\u00eam m\u1ed9t l\u1edbp c\u00e1ch nhi\u1ec7t n\u1eefa, \u0111\u00f3 l\u00e0 bi\u1ec7n ph\u00e1p c\u00e1ch nhi\u1ec7t k\u00e9p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u1ebfu l\u1edbp c\u00e1ch nhi\u1ec7t n\u00e0o b\u1ecb h\u1ecfng th\u00ec v\u1eabn c\u00f2n m\u1ed9t l\u1edbp c\u00e1ch nhi\u1ec7t kh\u00e1c v\u1eabn gi\u1eef vai tr\u00f2 b\u1ea3o v\u1ec7. Hi\u1ec7u qu\u1ea3 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt c\u1ee7a c\u00e1ch \u0111i\u1ec7n t\u0103ng c\u01b0\u1eddng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1ch \u0111i\u1ec7n k\u00e9p trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, v\u00ec v\u1eady n\u00f3 c\u0169ng \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t c\u00e1ch ph\u00f2ng ng\u1eeba k\u00e9p hi\u1ec7u qu\u1ea3. Thi\u1ebft b\u1ecb lo\u1ea1i II \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo ti\u00eau chu\u1ea9n ch\u1ee7 y\u1ebfu nh\u1ea5n m\u1ea1nh r\u1eb1ng thi\u1ebft b\u1ecb \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 c\u00e1ch \u0111i\u1ec7n k\u00e9p th\u00f4ng qua v\u1ecf, d\u00e2y c\u00e1ch \u0111i\u1ec7n v\u00e0 v\u1ecf b\u1ecdc c\u1ee7a d\u00e2y c\u00e1ch \u0111i\u1ec7n. Thi\u1ebft b\u1ecb c\u00f3 bi\u1ec7n ph\u00e1p n\u1ed1i \u0111\u1ea5t l\u00e0 thi\u1ebft b\u1ecb C\u1ea5p I n\u00ean thi\u1ebft b\u1ecb C\u1ea5p II kh\u00f4ng c\u00f3 n\u1ed1i \u0111\u1ea5t b\u1ea3o v\u1ec7.

Ngo\u1ea1i tr\u1eeb c\u00e1c thi\u1ebft b\u1ecb Lo\u1ea1i 0, t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb c\u00f3 v\u1ecf b\u1eb1ng nh\u1ef1a ho\u1eb7c c\u00e1ch \u0111i\u1ec7n c\u00f3 di\u1ec7n t\u00edch l\u1edbn th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf l\u00e0 thi\u1ebft b\u1ecb Lo\u1ea1i II. Tuy nhi\u00ean, c\u0169ng c\u00f3 m\u1ed9t s\u1ed1 \u0111\u1ed9ng c\u01a1 c\u00f3 v\u1ecf b\u1eb1ng kim lo\u1ea1i, m\u1eb7c d\u00f9 s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb Lo\u1ea1i II nh\u01b0ng v\u1eabn c\u00f3 bi\u1ec7n ph\u00e1p n\u1ed1i \u0111\u1ea5t b\u1ea3o v\u1ec7 tr\u00ean \u0111\u1ed9ng c\u01a1. Thi\u1ebft b\u1ecb n\u00e0y \u0111\u01b0\u1ee3c coi l\u00e0 thi\u1ebft b\u1ecb Lo\u1ea1i I. C\u00e1c ch\u00fa th\u00edch \u1edf \u0111i\u1ec1u n\u00e0y gi\u1edbi thi\u1ec7u c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb C\u1ea5p II c\u00f3 th\u1ec3 c\u00f3.
\n

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\n<\/figure>
\nH\u00ecnh 11 \u2013 V\u00ed d\u1ee5 v\u1ec1 c\u00e1c kho\u1ea3ng tr\u1ed1ng trong ti\u00eau chu\u1ea9n IEC 60335-1 \u0111\u01b0a ra m\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n. D\u1ef1a v\u00e0o h\u00ecnh n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 ngh\u0129 v\u1ec1 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u01a1 b\u1ea3n c\u1ee7a thi\u1ebft b\u1ecb c\u1ea5p II, c\u00f4ng tr\u00ecnh c\u1ea5p II, thi\u1ebft b\u1ecb c\u1ea5p I v\u00e0 c\u00f4ng tr\u00ecnh c\u1ea5p I.
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thi\u1ebft b\u1ecb c\u1ea5p II: thi\u1ebft b\u1ecb kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt c\u00e1ch nhi\u1ec7t c\u01a1 b\u1ea3n ch\u1ec9 nh\u01b0ng trong \u0111\u00f3 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba an to\u00e0n b\u1ed5 sung \u0111\u01b0\u1ee3c cung c\u1ea5p, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1ch nhi\u1ec7t k\u00e9p ho\u1eb7c c\u00e1ch nhi\u1ec7t t\u0103ng c\u01b0\u1eddng, kh\u00f4ng c\u00f3 quy \u0111\u1ecbnh n\u00e0o v\u1ec1 n\u1ed1i…<\/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":[74,80,82,83,84,162,159,105,147,161,77,75],"class_list":["post-525","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-relies-upon-basic-insulation-only-there-being-no-means-for-the-connection-of-conductive-accessible-parts-if-any-to-the-protective-conductor-in-t","tag-appliance-in-which-protection-against-electric-shock-does-not-rely-on-basic-insulation-only-but-which-includes-an-additional-safety-precaution-in-that-conductive-accessible-parts-are-connected-to-the","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-double-precaution","tag-earthing","tag-conductor-or-conductive-part-intended-to-be-energized-in-normal-use-including-a-neutral-conductor-but-by-convention-not-a-pen-conductor","tag-protection-against-electric-shock","tag-protective-earthing-conductor","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-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":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\/525","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=525"}],"version-history":[{"count":60,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/525\/revisions"}],"predecessor-version":[{"id":2836,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/posts\/525\/revisions\/2836"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/media?parent=525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/categories?post=525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/vi\/wp-json\/wp\/v2\/tags?post=525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}