{"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\/ro\/clause-3-how-to-understand-the-definition-of-extra-low-voltage\/","title":{"rendered":"Clauza 3 \u2013 Cum s\u0103 \u00een\u021belege\u021bi defini\u021bia \u201etensiunii foarte joase\u201d"},"content":{"rendered":"tensiune foarte joas\u0103: tensiune furnizat\u0103 de la o surs\u0103 din interiorul aparatului care nu dep\u0103\u0219e\u0219te 50 V \u00eentre conductori \u0219i \u00eentre conductori \u0219i p\u0103m\u00e2nt atunci c\u00e2nd aparatul este alimentat la tensiunea nominal\u0103<br>\n<br>\nConform defini\u021biei Directivei UE de joas\u0103 tensiune, tensiunea joas\u0103 variaz\u0103 de la 50-1000V pentru AC \u0219i 75-1500V pentru DC. Apropo, majoritatea \u021b\u0103rilor \u00eempart tensiunile \u00eenalte \u0219i joase \u00een func\u021bie de aceast\u0103 valoare a tensiunii. Prin urmare, tensiunile peste limita superioar\u0103 a intervalului sunt tensiuni \u00eenalte, iar tensiunile sub limita inferioar\u0103 a intervalului sunt tensiuni foarte joase. Defini\u021bia de aici din standard nu face distinc\u021bie \u00eentre DC \u0219i AC. V\u0103 rug\u0103m s\u0103 re\u021bine\u021bi c\u0103 aici este definit doar un nume de tensiune \u00een func\u021bie de valoarea tensiunii \u0219i nu define\u0219te o anumit\u0103 parte a circuitului de joas\u0103 tensiune. Deoarece tensiunea este relativ\u0103, atunci c\u00e2nd se m\u0103soar\u0103 tensiunea, tensiunea trebuie m\u0103surat\u0103 \u00eentre cele dou\u0103 capete, adic\u0103 tensiunea trebuie s\u0103 aib\u0103 un punct de referin\u021b\u0103, a\u0219a c\u0103 standardul men\u021bioneaz\u0103 tensiunea dintre fire \u0219i dintre fire \u0219i p\u0103m\u00e2nt.<br>\n<br>\nTensiunea de ie\u0219ire a bateriilor alcaline obi\u0219nuite de uz casnic, tensiunea de lucru a circuitului de joas\u0103 tensiune dup\u0103 transformator sau circuitul descendente RC de pe placa de circuite de control a aparatelor de uz casnic obi\u0219nuite, toate put\u00e2nd fi definite ca tensiune foarte joas\u0103 .<br>\n<br>\nA\u0219a cum se arat\u0103 \u00een figura de mai jos, R1 \u0219i C1 completeaz\u0103 o func\u021bie de reducere a tensiunii, astfel \u00eenc\u00e2t circuitul care urmeaz\u0103 R1 \u0219i C1 poate fi definit ca un circuit de tensiune foarte joas\u0103.<br>\n<figure class=\"wp-block-image size-full\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"688\" height=\"226\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/09\/RC-step-down-circuit-ELV.jpg\" alt=\"\" class=\"wp-image-2261\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/09\/RC-step-down-circuit-ELV.jpg 688w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/09\/RC-step-down-circuit-ELV-300x99.jpg 300w\" sizes=\"auto, (max-width: 688px) 100vw, 688px\" \/><br>\n<\/figure>","protected":false},"excerpt":{"rendered":"<p>tensiune foarte joas\u0103: tensiune furnizat\u0103 de la o surs\u0103 din interiorul aparatului care nu dep\u0103\u0219e\u0219te 50 V \u00eentre conductori \u0219i \u00eentre conductori \u0219i p\u0103m\u00e2nt atunci c\u00e2nd aparatul este alimentat la tensiunea nominal\u0103 Conform defini\u021biei Directivei UE de joas\u0103 tensiune, tensiunea joas\u0103 variaz\u0103 de la 50-1000V pentru AC \u0219i 75-1500V pentru DC. Apropo, majoritatea \u021b\u0103rilor \u00eempart&#8230;<\/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":"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\/2257","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=2257"}],"version-history":[{"count":20,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/posts\/2257\/revisions"}],"predecessor-version":[{"id":2280,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/posts\/2257\/revisions\/2280"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/media?parent=2257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/categories?post=2257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/ro\/wp-json\/wp\/v2\/tags?post=2257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}