{"id":35282,"date":"2025-06-18T19:22:50","date_gmt":"2025-06-18T19:22:50","guid":{"rendered":"https:\/\/sunvault.ro\/calculating-conductor-size-for-direct-current-dc\/"},"modified":"2026-02-10T13:14:12","modified_gmt":"2026-02-10T13:14:12","slug":"calculating-conductor-size-for-direct-current-dc","status":"publish","type":"post","link":"https:\/\/sunvault.ro\/en\/calculating-conductor-size-for-direct-current-dc\/","title":{"rendered":"Calculating conductor size for direct current (DC)"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"35282\" class=\"elementor elementor-35282 elementor-34782\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3a09dbe0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3a09dbe0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2b4c7d33\" data-id=\"2b4c7d33\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ea30eda elementor-widget elementor-widget-shortcode\" data-id=\"ea30eda\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\">\n    <style>\n        #dc-wire-calculator {\n            max-width: 500px;\n            margin: 0 auto;\n            font-family: \"Segoe UI\", sans-serif;\n            border: 1px solid #ddd;\n            padding: 20px;\n            border-radius: 8px;\n            box-shadow: 0 0 10px rgba(0,0,0,0.05);\n            background: #fff;\n        }\n        #dc-wire-calculator label {\n            display: block;\n            margin-top: 12px;\n            font-weight: 500;\n        }\n        #dc-wire-calculator input,\n        #dc-wire-calculator select {\n            width: 100%;\n            padding: 8px;\n            margin-top: 5px;\n            border: 1px solid #ccc;\n            border-radius: 4px;\n        }\n        #dc-wire-calculator button {\n            margin-top: 15px;\n            padding: 10px 15px;\n            background: #0073aa;\n            color: #fff;\n            border: none;\n            border-radius: 4px;\n            cursor: pointer;\n        }\n        #dc-wire-calculator button:hover {\n            background: #005a87;\n        }\n        #dc-wire-calculator #result {\n            margin-top: 20px;\n            font-weight: bold;\n            color: #1a1a1a;\n        }\n    <\/style>\n\n    <div id=\"dc-wire-calculator\">\n        <h2>Calculator Dimensiune Cablu DC<\/h2>\n\n        <label for=\"voltage\">Tensiune surs\u0103 (V):<\/label>\n        <input type=\"number\" id=\"voltage\" placeholder=\"ex: 120\" \/>\n\n        <label for=\"current\">Curent (A):<\/label>\n        <input type=\"number\" id=\"current\" placeholder=\"ex: 200\" \/>\n\n        <label for=\"distance\">Distan\u021b\u0103 (m):<\/label>\n        <input type=\"number\" id=\"distance\" placeholder=\"ex: 50\" \/>\n\n        <label for=\"material\">Material conductor:<\/label>\n        <select id=\"material\">\n            <option value=\"copper\">Cupru<\/option>\n            <option value=\"aluminum\">Aluminiu<\/option>\n        <\/select>\n\n        <label for=\"temperature\">Temperatur\u0103 (\u00b0C):<\/label>\n        <input type=\"number\" id=\"temperature\" placeholder=\"ex: 75\" value=\"75\" \/>\n\n        <button id=\"calc-btn\">Calculeaz\u0103<\/button>\n\n        <div id=\"result\"><\/div>\n\n<div id=\"override-section\" style=\"display:none; margin-top:20px;\">\n    <label for=\"manual_mm2\">Optimizeaz\u0103 sec\u021biunea manual (mm\u00b2):<\/label>\n    <input type=\"number\" id=\"manual_mm2\" min=\"1\" step=\"0.5\" \/>\n    <button id=\"recalculate\">Recalculeaz\u0103 c\u0103derea de tensiune<\/button>\n    <div id=\"override-result\" style=\"margin-top:10px;\"><\/div>\n<\/div>\n        \n    <\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45d58daf elementor-widget elementor-widget-text-editor\" data-id=\"45d58daf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h3 data-start=\"324\" data-end=\"390\">Cum alegi corect sec\u021biunea cablului \u00eentr-un sistem electric DC<\/h3>\n<p data-start=\"392\" data-end=\"594\">Pentru a dimensiona corect un conductor \u00eentr-un sistem DC, este important s\u0103 iei \u00een calcul <strong data-start=\"483\" data-end=\"501\">curentul maxim<\/strong>, <strong data-start=\"503\" data-end=\"531\">distan\u021ba p\u00e2n\u0103 la sarcin\u0103<\/strong>, <strong data-start=\"533\" data-end=\"561\">materialul conductorului<\/strong> \u0219i <strong data-start=\"565\" data-end=\"591\">temperatura de operare<\/strong>.<\/p>\n<p data-start=\"596\" data-end=\"776\"><strong data-start=\"596\" data-end=\"720\">Sec\u021biunea conductorului trebuie aleas\u0103 \u00een primul r\u00e2nd pentru a sus\u021bine curentul \u00een condi\u021bii sigure (f\u0103r\u0103 supra\u00eenc\u0103lzire)<\/strong>, apoi optimizat\u0103 pentru a minimiza c\u0103derea de tensiune.<\/p>\n<hr data-start=\"778\" data-end=\"781\" \/>\n<h3 data-start=\"783\" data-end=\"838\">\ud83d\udd10 Criteriu principal: Siguran\u021ba termic\u0103 (ampacity)<\/h3>\n<p data-start=\"840\" data-end=\"1035\">Calculatorul nostru stabile\u0219te automat <strong data-start=\"879\" data-end=\"908\">sec\u021biunea minim\u0103 necesar\u0103<\/strong> pe baza unor valori standardizate de <strong data-start=\"946\" data-end=\"985\">ampacitate (curent maxim admisibil)<\/strong> pentru cupru sau aluminiu, astfel \u00eenc\u00e2t s\u0103 evi\u021bi:<\/p>\n<ul data-start=\"1037\" data-end=\"1119\">\n<li data-start=\"1037\" data-end=\"1063\">\n<p data-start=\"1039\" data-end=\"1063\">supra\u00eenc\u0103lzirea firelor,<\/p>\n<\/li>\n<li data-start=\"1064\" data-end=\"1084\">\n<p data-start=\"1066\" data-end=\"1084\">topirea izola\u021biei,<\/p>\n<\/li>\n<li data-start=\"1085\" data-end=\"1119\">\n<p data-start=\"1087\" data-end=\"1119\">sau incendii \u00een instala\u021biile DC.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1121\" data-end=\"1124\" \/>\n<h3 data-start=\"1126\" data-end=\"1177\">\ud83d\udcc9 C\u0103derea de tensiune \u2013 informativ, nu decisiv<\/h3>\n<p data-start=\"1179\" data-end=\"1458\">Dup\u0103 ce se stabile\u0219te sec\u021biunea de baz\u0103 pentru siguran\u021b\u0103, calculatorul <strong data-start=\"1250\" data-end=\"1283\">\u00ee\u021bi arat\u0103 c\u0103derea de tensiune<\/strong> corespunz\u0103toare configura\u021biei tale (\u00een vol\u021bi \u0219i procente). Dac\u0103 vrei un sistem mai eficient, po\u021bi <strong data-start=\"1382\" data-end=\"1409\">cre\u0219te manual sec\u021biunea<\/strong> pentru a ob\u021bine o pierdere de tensiune mai mic\u0103.<\/p>\n<hr data-start=\"1460\" data-end=\"1463\" \/>\n<h3 data-start=\"1465\" data-end=\"1488\">\u26a1 Exemplu de calcul<\/h3>\n<p data-start=\"1490\" data-end=\"1553\">S\u0103 presupunem un sistem off-grid cu urm\u0103toarele caracteristici:<\/p>\n<ul data-start=\"1555\" data-end=\"1755\">\n<li data-start=\"1555\" data-end=\"1617\">\n<p data-start=\"1557\" data-end=\"1617\">Tensiune nominal\u0103: <strong data-start=\"1576\" data-end=\"1586\">51.2 V<\/strong> (baterie LiFePO\u2084 \u2013 sistem 48V)<\/p>\n<\/li>\n<li data-start=\"1618\" data-end=\"1643\">\n<p data-start=\"1620\" data-end=\"1643\">Curent maxim: <strong data-start=\"1634\" data-end=\"1643\">100 A<\/strong><\/p>\n<\/li>\n<li data-start=\"1644\" data-end=\"1690\">\n<p data-start=\"1646\" data-end=\"1690\">Distan\u021b\u0103 de la baterie la invertor: <strong data-start=\"1682\" data-end=\"1690\">10 m<\/strong><\/p>\n<\/li>\n<li data-start=\"1691\" data-end=\"1713\">\n<p data-start=\"1693\" data-end=\"1713\">Conductor: <strong data-start=\"1704\" data-end=\"1713\">cupru<\/strong><\/p>\n<\/li>\n<li data-start=\"1714\" data-end=\"1755\">\n<p data-start=\"1716\" data-end=\"1755\">Temperatura estimat\u0103 \u00een cablu: <strong data-start=\"1747\" data-end=\"1755\">75\u00b0C<\/strong><\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"1757\" data-end=\"1804\">\u27a4 Etapa 1: calcul automat pentru siguran\u021b\u0103<\/h4>\n<p data-start=\"1806\" data-end=\"1865\">Conform tabelului de ampacitate, pentru 100 A este necesar:<\/p>\n<ul data-start=\"1866\" data-end=\"1884\">\n<li data-start=\"1866\" data-end=\"1884\">\n<p data-start=\"1868\" data-end=\"1884\"><strong data-start=\"1868\" data-end=\"1884\">minim 25 mm\u00b2<\/strong><\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"1886\" data-end=\"1941\">\u27a4 Etapa 2: calcul automat al pierderii de tensiune<\/h4>\n<p data-start=\"1943\" data-end=\"1998\">Calcul\u0103m c\u0103derea de tensiune real\u0103 la aceast\u0103 sec\u021biune<\/p>\n<p><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5cd0516 elementor-widget elementor-widget-image\" data-id=\"5cd0516\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"699\" height=\"118\" src=\"https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune.png\" class=\"attachment-large size-large wp-image-34787\" alt=\"\" srcset=\"https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune.png 699w, https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune-300x51.png 300w, https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune-100x17.png 100w, https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune-60x10.png 60w, https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune-480x81.png 480w, https:\/\/sunvault.ro\/wp-content\/uploads\/2025\/06\/formula-pierdere-tensiune-600x101.png 600w\" sizes=\"(max-width: 699px) 100vw, 699px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db4b7c9 elementor-widget elementor-widget-text-editor\" data-id=\"db4b7c9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p data-start=\"2229\" data-end=\"2411\">\ud83d\udd0e Rezultatul este acceptabil pentru aplica\u021bii normale. Dar dac\u0103 dore\u0219ti o c\u0103dere &lt;2%, po\u021bi optimiza manual sec\u021biunea la, de exemplu, <strong data-start=\"2363\" data-end=\"2373\">50 mm\u00b2<\/strong>, ceea ce reduce pierderea la sub 1 V.<\/p>\n<hr data-start=\"2413\" data-end=\"2416\" \/>\n<h3 data-start=\"2418\" data-end=\"2463\">\ud83d\udee0 Recomand\u0103ri orientative (pentru cupru)<\/h3>\n<div class=\"_tableContainer_16hzy_1\">\n<div class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2465\" data-end=\"2869\">\n<thead data-start=\"2465\" data-end=\"2509\">\n<tr data-start=\"2465\" data-end=\"2509\">\n<th data-start=\"2465\" data-end=\"2478\" data-col-size=\"sm\">Curent (A)<\/th>\n<th data-start=\"2478\" data-end=\"2509\" data-col-size=\"sm\">Sec\u021biune minim\u0103 recomandat\u0103<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2555\" data-end=\"2869\">\n<tr data-start=\"2555\" data-end=\"2599\">\n<td data-start=\"2555\" data-end=\"2568\" data-col-size=\"sm\">25<\/td>\n<td data-col-size=\"sm\" data-start=\"2568\" data-end=\"2599\">6 mm\u00b2<\/td>\n<\/tr>\n<tr data-start=\"2600\" data-end=\"2644\">\n<td data-start=\"2600\" data-end=\"2613\" data-col-size=\"sm\">50<\/td>\n<td data-col-size=\"sm\" data-start=\"2613\" data-end=\"2644\">10 mm\u00b2<\/td>\n<\/tr>\n<tr data-start=\"2645\" data-end=\"2689\">\n<td data-start=\"2645\" data-end=\"2658\" data-col-size=\"sm\">80<\/td>\n<td data-col-size=\"sm\" data-start=\"2658\" data-end=\"2689\">16 mm\u00b2<\/td>\n<\/tr>\n<tr data-start=\"2690\" data-end=\"2734\">\n<td data-start=\"2690\" data-end=\"2703\" data-col-size=\"sm\">100<\/td>\n<td data-col-size=\"sm\" data-start=\"2703\" data-end=\"2734\">25 mm\u00b2<\/td>\n<\/tr>\n<tr data-start=\"2735\" data-end=\"2779\">\n<td data-start=\"2735\" data-end=\"2748\" data-col-size=\"sm\">125<\/td>\n<td data-col-size=\"sm\" data-start=\"2748\" data-end=\"2779\">35 mm\u00b2<\/td>\n<\/tr>\n<tr data-start=\"2780\" data-end=\"2824\">\n<td data-start=\"2780\" data-end=\"2793\" data-col-size=\"sm\">150<\/td>\n<td data-col-size=\"sm\" data-start=\"2793\" data-end=\"2824\">50 mm\u00b2<\/td>\n<\/tr>\n<tr data-start=\"2825\" data-end=\"2869\">\n<td data-start=\"2825\" data-end=\"2838\" data-col-size=\"sm\">200<\/td>\n<td data-col-size=\"sm\" data-start=\"2838\" data-end=\"2869\">70 mm\u00b2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div>\u00a0<\/div>\n<div class=\"sticky end-(--thread-content-margin) h-0 self-end select-none\">\n<div class=\"absolute end-0 flex items-end\">\u00a0<span style=\"font-family: 'Space Grotesk', serif; font-size: 40px; font-weight: bold; background-color: transparent;\">\ud83d\udccc Concluzie<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<ul data-start=\"2894\" data-end=\"3168\">\n<li data-start=\"2894\" data-end=\"2954\">\n<p data-start=\"2896\" data-end=\"2954\"><strong data-start=\"2896\" data-end=\"2954\">Nu calcula sec\u021biunea doar pe baza c\u0103derii de tensiune.<\/strong><\/p>\n<\/li>\n<li data-start=\"2955\" data-end=\"3007\">\n<p data-start=\"2957\" data-end=\"3007\">Prioritizeaz\u0103 \u00eentotdeauna <strong data-start=\"2983\" data-end=\"3006\">siguran\u021ba electric\u0103<\/strong>.<\/p>\n<\/li>\n<li data-start=\"3008\" data-end=\"3168\">\n<p data-start=\"3010\" data-end=\"3168\">Dup\u0103 aceea, dac\u0103 dore\u0219ti un sistem eficient, folose\u0219te func\u021bia de optimizare din calculator pentru a reduce c\u0103derea de tensiune la valori sub 3% sau chiar 1%.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3170\" data-end=\"3173\" \/>\n<p data-start=\"3175\" data-end=\"3308\">\ud83d\udd12 <em data-start=\"3178\" data-end=\"3308\">Aten\u021bie: Valorile prezentate sunt informative. Consult\u0103 un electrician autorizat pentru proiecte critice sau de dimensiuni mari.<\/em><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Cum alegi corect sec\u021biunea cablului \u00eentr-un sistem electric DC Pentru a dimensiona corect un conductor \u00eentr-un sistem DC, este important s\u0103 iei \u00een calcul curentul maxim, distan\u021ba p\u00e2n\u0103 la sarcin\u0103, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[603],"tags":[],"class_list":["post-35282","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/posts\/35282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/comments?post=35282"}],"version-history":[{"count":1,"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/posts\/35282\/revisions"}],"predecessor-version":[{"id":35283,"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/posts\/35282\/revisions\/35283"}],"wp:attachment":[{"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/media?parent=35282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/categories?post=35282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sunvault.ro\/en\/wp-json\/wp\/v2\/tags?post=35282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}