{"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\/ro\/clause-3-how-to-understand-the-definition-of-class-iii-appliance\/","title":{"rendered":"Clauza 3 \u2013 Cum s\u0103 \u00een\u021belege\u021bi defini\u021bia \u201eaparatului de clasa III\u201d"},"content":{"rendered":"aparat de clasa a III-a: aparat \u00een care protec\u021bia \u00eempotriva \u0219ocurilor electrice se bazeaz\u0103 pe alimentarea la tensiune foarte joas\u0103 de siguran\u021b\u0103 \u0219i \u00een care nu se genereaz\u0103 tensiuni mai mari dec\u00e2t cele de tensiune foarte sc\u0103zut\u0103 de siguran\u021b\u0103.
NOT\u0102 Poate fi necesar\u0103 izola\u021bia de baz\u0103 \u00een plus fa\u021b\u0103 de alimentarea la SELV. Consulta\u021bi 8.1.4.<\/em>
\nPentru a \u00een\u021belege acest lucru, trebuie s\u0103 \u00een\u021belege\u021bi mai \u00eent\u00e2i ce este tensiunea foarte joas\u0103 de siguran\u021b\u0103 (SELV). V\u0103 rug\u0103m s\u0103 consulta\u021bi defini\u021bia \u0219i explica\u021bia SELV. Acest tip de produs este alimentat \u00een general de un adaptor, USB sau o surs\u0103 de alimentare de joas\u0103 tensiune \u00eentr-o ma\u0219in\u0103. C\u00e2nd acest tip de produs este v\u00e2ndut, acesta nu va fi echipat cu un dispozitiv care converte\u0219te puterea de 100-240V AC \u00een tensiunea sc\u0103zut\u0103 necesar\u0103, deoarece dac\u0103 este echipat cu un astfel de dispozitiv de conversie, cum ar fi un adaptor, atunci adaptorul \u0219i aparatul formeaz\u0103 un \u00eentreg, iar nivelul de protec\u021bie al \u00eentregului este determinat de adaptor. Adaptorul este de obicei o construc\u021bie de clasa a II-a, astfel \u00eenc\u00e2t adaptorul \u0219i aparatul sunt definite ca un aparat de clasa a II-a. Deoarece tensiunea de alimentare a acestui tip de aparat este relativ sc\u0103zut\u0103, uneori duce la incapacitatea de a finaliza unele func\u021bii electrice specifice, de aceea este necesar\u0103 utilizarea unui circuit de amplificare pentru a cre\u0219te tensiunea pentru a realiza unele func\u021bii speciale ale aparatului. De exemplu, func\u021bia unui generator de ioni negativi necesit\u0103 o opera\u021bie de amplificare. Acest tip de aparat cu un generator de ioni negativi similar sau o func\u021bionare de amplificare (valoarea tensiunii mai mare dec\u00e2t SELV) nu poate fi determinat ca un aparat de Clasa III.
\n
\nCuv\u00e2ntul \u201esiguran\u021b\u0103\u201d este inclus \u00een cele patru cuvinte \u201etensiune foarte joas\u0103 de siguran\u021b\u0103\u201d, dar acest lucru nu \u00eenseamn\u0103 c\u0103 SELV este sigur \u0219i nu este neap\u0103rat sigur s\u0103 atinge\u021bi direct. Numai circuitele de siguran\u021b\u0103 de foarte joas\u0103 tensiune care \u00eendeplinesc cerin\u021bele standardului 8.1.4 pot fi atinse direct. Vom analiza \u0219i explica \u00een mod specific acest lucru atunci c\u00e2nd analiz\u0103m clauza 8.1.4.
\n
\nVentilatorul prezentat \u00een figura de mai jos poate fi definit ca un aparat de clasa III. Cu toate acestea, acest ventilator are dou\u0103 urechi, ceea ce \u00eel face s\u0103 nu respecte clauza 22.44. Vom explica detaliile mai t\u00e2rziu.
\n

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

aparat de clasa a III-a: aparat \u00een care protec\u021bia \u00eempotriva \u0219ocurilor electrice se bazeaz\u0103 pe alimentarea la tensiune foarte joas\u0103 de siguran\u021b\u0103 \u0219i \u00een care nu se genereaz\u0103 tensiuni mai mari dec\u00e2t cele de tensiune foarte sc\u0103zut\u0103 de siguran\u021b\u0103.NOT\u0102 Poate fi necesar\u0103 izola\u021bia de baz\u0103 \u00een plus fa\u021b\u0103 de alimentarea la SELV. Consulta\u021bi 8.1.4. Pentru…<\/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":"ro","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\/ro\/wp-json\/wp\/v2\/posts\/577","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/comments?post=577"}],"version-history":[{"count":30,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/posts\/577\/revisions"}],"predecessor-version":[{"id":1994,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/posts\/577\/revisions\/1994"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/media?parent=577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/categories?post=577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/tags?post=577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}