{"id":27034,"date":"2024-12-31T18:40:26","date_gmt":"2024-12-31T10:40:26","guid":{"rendered":"https:\/\/cnspd.com\/?p=27034"},"modified":"2026-04-13T13:06:49","modified_gmt":"2026-04-13T05:06:49","slug":"3-phase-surge-protector","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/","title":{"rendered":"Protecteur de surtension triphas\u00e9 : Le livre blanc d\u00e9finitif sur la s\u00e9curit\u00e9 \u00e9lectrique dans l'industrie et le commerce | LEEYEE Electrics"},"content":{"rendered":"<h1 data-start=\"523\" data-end=\"621\">3 Phase Surge Protector: The Definitive Whitepaper for Industrial &amp; Commercial Electrical Safety<\/h1>\n<p data-start=\"623\" data-end=\"786\">In industrial and commercial electrical systems, the <strong data-start=\"676\" data-end=\"709\">3 Phase Surge Protector (SPD)<\/strong> plays a critical role in preventing damage caused by transient overvoltages.<\/p>\n<p data-start=\"788\" data-end=\"1012\">With the rise of Industry 4.0, automation systems, PLCs, VFDs, and data centers have become highly sensitive to voltage disturbances. A single surge event can cause equipment failure, production downtime, and financial loss.<\/p>\n<p data-start=\"1014\" data-end=\"1148\">This whitepaper explains the technical principles, system configurations, and selection criteria for 3-phase surge protection devices.<\/p>\n<hr data-start=\"1150\" data-end=\"1153\" \/>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#part-i-why-3-phase-systems-require-specialized-protection\" >Part I: Why 3-Phase Systems Require Specialized Protection<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#1-complexity-of-3-phase-surges\" >1. Complexity of 3-Phase Surges<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#2-core-protection-technology\" >2. Core Protection Technology<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#part-ii-system-configurations-%e2%80%93-star-wye-vs-delta\" >Part II: System Configurations \u2013 Star (Wye) vs. Delta<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#1-wye-star-systems-%e2%80%93-3pn-4-pole\" >1. Wye (Star) Systems \u2013 3P+N (4-Pole)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#2-delta-systems-%e2%80%93-3-pole\" >2. Delta Systems \u2013 3-Pole<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#part-iii-technical-specifications-%e2%80%93-engineers-checklist\" >Part III: Technical Specifications \u2013 Engineer\u2019s Checklist<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#1-nominal-discharge-current-in\" >1. Nominal Discharge Current (In)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#2-maximum-discharge-current-imax\" >2. Maximum Discharge Current (Imax)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#3-voltage-protection-level-up\" >3. Voltage Protection Level (Up)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#4-mcov-uc\" >4. MCOV (Uc)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#5-response-time-ta\" >5. Response Time (tA)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#part-iv-3-pole-vs-4-pole-comparison\" >Part IV: 3-Pole vs. 4-Pole Comparison<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#part-v-b2b-sourcing-considerations\" >Part V: B2B Sourcing Considerations<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#certification\" >Certification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#manufacturing-quality-control\" >Manufacturing &amp; Quality Control<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#part-vi-procurement-guide-%e2%80%93-5-red-flags\" >Part VI: Procurement Guide \u2013 5 Red Flags<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#frequently-asked-questions-faq\" >Frequently Asked Questions (FAQ)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#do-i-need-an-spd-if-i-already-have-a-lightning-rod\" >Do I need an SPD if I already have a lightning rod?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#what-is-the-difference-between-type-1-and-type-2-3-phase-spds\" >What is the difference between Type 1 and Type 2 3-phase SPDs?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#can-three-single-phase-spds-replace-one-3-phase-unit\" >Can three single-phase SPDs replace one 3-phase unit?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#how-often-should-a-3-phase-spd-be-replaced\" >How often should a 3-phase SPD be replaced?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#what-is-a-31-configuration\" >What is a 3+1 configuration?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#is-oemodm-available-for-3-phase-spds\" >Is OEM\/ODM available for 3-phase SPDs?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/protecteur-de-surtension-triphase\/#conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"1155\" data-end=\"1216\"><span class=\"ez-toc-section\" id=\"part-i-why-3-phase-systems-require-specialized-protection\"><\/span>Part I: Why 3-Phase Systems Require Specialized Protection<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"1218\" data-end=\"1253\"><span class=\"ez-toc-section\" id=\"1-complexity-of-3-phase-surges\"><\/span>1. Complexity of 3-Phase Surges<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1255\" data-end=\"1292\">A typical 3-phase system operates at:<\/p>\n<ul data-start=\"1294\" data-end=\"1338\">\n<li data-start=\"1294\" data-end=\"1315\">\n<p data-start=\"1296\" data-end=\"1315\">400V (Europe, Asia)<\/p>\n<\/li>\n<li data-start=\"1316\" data-end=\"1338\">\n<p data-start=\"1318\" data-end=\"1338\">480V (North America)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1340\" data-end=\"1382\">Surges in these systems can occur between:<\/p>\n<ul data-start=\"1384\" data-end=\"1485\">\n<li data-start=\"1384\" data-end=\"1409\">\n<p data-start=\"1386\" data-end=\"1409\">Line to Neutral (L-N)<\/p>\n<\/li>\n<li data-start=\"1410\" data-end=\"1434\">\n<p data-start=\"1412\" data-end=\"1434\">Line to Earth (L-PE)<\/p>\n<\/li>\n<li data-start=\"1435\" data-end=\"1462\">\n<p data-start=\"1437\" data-end=\"1462\">Neutral to Earth (N-PE)<\/p>\n<\/li>\n<li data-start=\"1463\" data-end=\"1485\">\n<p data-start=\"1465\" data-end=\"1485\">Line to Line (L-L)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1487\" data-end=\"1635\">A dedicated 3-phase SPD must monitor and clamp all phase conductors simultaneously to prevent destructive energy from reaching downstream equipment.<\/p>\n<hr data-start=\"1637\" data-end=\"1640\" \/>\n<h3 data-start=\"1642\" data-end=\"1675\"><span class=\"ez-toc-section\" id=\"2-core-protection-technology\"><\/span>2. Core Protection Technology<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1677\" data-end=\"1735\">Modern 3-phase SPDs use coordinated protection components:<\/p>\n<h4 data-start=\"1737\" data-end=\"1769\">Metal Oxide Varistors (MOV)<\/h4>\n<ul data-start=\"1771\" data-end=\"1889\">\n<li data-start=\"1771\" data-end=\"1799\">\n<p data-start=\"1773\" data-end=\"1799\">Nanosecond response time<\/p>\n<\/li>\n<li data-start=\"1800\" data-end=\"1850\">\n<p data-start=\"1802\" data-end=\"1850\">Clamp voltage to defined protection level (Up)<\/p>\n<\/li>\n<li data-start=\"1851\" data-end=\"1889\">\n<p data-start=\"1853\" data-end=\"1889\">Primary surge absorption component<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"1891\" data-end=\"1921\">Gas Discharge Tubes (GDT)<\/h4>\n<ul data-start=\"1923\" data-end=\"2030\">\n<li data-start=\"1923\" data-end=\"1965\">\n<p data-start=\"1925\" data-end=\"1965\">High surge current handling capability<\/p>\n<\/li>\n<li data-start=\"1966\" data-end=\"1999\">\n<p data-start=\"1968\" data-end=\"1999\">Often used in N-PE protection<\/p>\n<\/li>\n<li data-start=\"2000\" data-end=\"2030\">\n<p data-start=\"2002\" data-end=\"2030\">High insulation resistance<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"2032\" data-end=\"2058\">Thermal Disconnectors<\/h4>\n<ul data-start=\"2060\" data-end=\"2162\">\n<li data-start=\"2060\" data-end=\"2089\">\n<p data-start=\"2062\" data-end=\"2089\">Built-in safety mechanism<\/p>\n<\/li>\n<li data-start=\"2090\" data-end=\"2123\">\n<p data-start=\"2092\" data-end=\"2123\">Disconnect SPD at end-of-life<\/p>\n<\/li>\n<li data-start=\"2124\" data-end=\"2162\">\n<p data-start=\"2126\" data-end=\"2162\">Prevents overheating and fire risk<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2164\" data-end=\"2167\" \/>\n<h2 data-start=\"2169\" data-end=\"2225\"><span class=\"ez-toc-section\" id=\"part-ii-system-configurations-%e2%80%93-star-wye-vs-delta\"><\/span>Part II: System Configurations \u2013 Star (Wye) vs. Delta<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2227\" data-end=\"2282\">Correct SPD selection depends on system grounding type.<\/p>\n<hr data-start=\"2284\" data-end=\"2287\" \/>\n<h3 data-start=\"2289\" data-end=\"2330\"><span class=\"ez-toc-section\" id=\"1-wye-star-systems-%e2%80%93-3pn-4-pole\"><\/span>1. Wye (Star) Systems \u2013 3P+N (4-Pole)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2332\" data-end=\"2342\">Common in:<\/p>\n<ul data-start=\"2344\" data-end=\"2419\">\n<li data-start=\"2344\" data-end=\"2368\">\n<p data-start=\"2346\" data-end=\"2368\">Commercial buildings<\/p>\n<\/li>\n<li data-start=\"2369\" data-end=\"2398\">\n<p data-start=\"2371\" data-end=\"2398\">European industrial sites<\/p>\n<\/li>\n<li data-start=\"2399\" data-end=\"2419\">\n<p data-start=\"2401\" data-end=\"2419\">230\/400V systems<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2421\" data-end=\"2437\">Characteristics:<\/p>\n<ul data-start=\"2439\" data-end=\"2568\">\n<li data-start=\"2439\" data-end=\"2473\">\n<p data-start=\"2441\" data-end=\"2473\">Requires <strong data-start=\"2450\" data-end=\"2467\">4-Pole (3P+N)<\/strong> SPD<\/p>\n<\/li>\n<li data-start=\"2474\" data-end=\"2513\">\n<p data-start=\"2476\" data-end=\"2513\">Protects L1, L2, L3 against Neutral<\/p>\n<\/li>\n<li data-start=\"2514\" data-end=\"2568\">\n<p data-start=\"2516\" data-end=\"2568\">Protects Neutral against Earth (3+1 configuration)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2570\" data-end=\"2586\">Typical systems:<\/p>\n<ul data-start=\"2588\" data-end=\"2614\">\n<li data-start=\"2588\" data-end=\"2596\">\n<p data-start=\"2590\" data-end=\"2596\">TN-S<\/p>\n<\/li>\n<li data-start=\"2597\" data-end=\"2607\">\n<p data-start=\"2599\" data-end=\"2607\">TN-C-S<\/p>\n<\/li>\n<li data-start=\"2608\" data-end=\"2614\">\n<p data-start=\"2610\" data-end=\"2614\">TT<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2616\" data-end=\"2619\" \/>\n<h3 data-start=\"2621\" data-end=\"2650\"><span class=\"ez-toc-section\" id=\"2-delta-systems-%e2%80%93-3-pole\"><\/span>2. Delta Systems \u2013 3-Pole<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2652\" data-end=\"2662\">Common in:<\/p>\n<ul data-start=\"2664\" data-end=\"2714\">\n<li data-start=\"2664\" data-end=\"2691\">\n<p data-start=\"2666\" data-end=\"2691\">Heavy industrial plants<\/p>\n<\/li>\n<li data-start=\"2692\" data-end=\"2714\">\n<p data-start=\"2694\" data-end=\"2714\">480V Delta systems<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2716\" data-end=\"2732\">Characteristics:<\/p>\n<ul data-start=\"2734\" data-end=\"2833\">\n<li data-start=\"2734\" data-end=\"2766\">\n<p data-start=\"2736\" data-end=\"2766\">Requires <strong data-start=\"2745\" data-end=\"2760\">3-Pole (3P)<\/strong> SPD<\/p>\n<\/li>\n<li data-start=\"2767\" data-end=\"2808\">\n<p data-start=\"2769\" data-end=\"2808\">Protects L1, L2, L3 directly to Earth<\/p>\n<\/li>\n<li data-start=\"2809\" data-end=\"2833\">\n<p data-start=\"2811\" data-end=\"2833\">No neutral conductor<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2835\" data-end=\"2855\">Important parameter:<\/p>\n<ul data-start=\"2857\" data-end=\"2941\">\n<li data-start=\"2857\" data-end=\"2896\">\n<p data-start=\"2859\" data-end=\"2896\">MCOV (Uc) must match system voltage<\/p>\n<\/li>\n<li data-start=\"2897\" data-end=\"2941\">\n<p data-start=\"2899\" data-end=\"2941\">480V systems may require MCOV up to 550V<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2943\" data-end=\"2946\" \/>\n<h2 data-start=\"2948\" data-end=\"3008\"><span class=\"ez-toc-section\" id=\"part-iii-technical-specifications-%e2%80%93-engineers-checklist\"><\/span>Part III: Technical Specifications \u2013 Engineer\u2019s Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3010\" data-end=\"3061\">When selecting a 3-phase SPD, verify the following:<\/p>\n<h3 data-start=\"3063\" data-end=\"3100\"><span class=\"ez-toc-section\" id=\"1-nominal-discharge-current-in\"><\/span>1. Nominal Discharge Current (In)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3102\" data-end=\"3193\">\n<li data-start=\"3102\" data-end=\"3144\">\n<p data-start=\"3104\" data-end=\"3144\">Surge current rating (8\/20\u00b5s waveform)<\/p>\n<\/li>\n<li data-start=\"3145\" data-end=\"3175\">\n<p data-start=\"3147\" data-end=\"3175\">Withstands repeated surges<\/p>\n<\/li>\n<li data-start=\"3176\" data-end=\"3193\">\n<p data-start=\"3178\" data-end=\"3193\">Example: 20kA<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3195\" data-end=\"3198\" \/>\n<h3 data-start=\"3200\" data-end=\"3239\"><span class=\"ez-toc-section\" id=\"2-maximum-discharge-current-imax\"><\/span>2. Maximum Discharge Current (Imax)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3241\" data-end=\"3302\">\n<li data-start=\"3241\" data-end=\"3276\">\n<p data-start=\"3243\" data-end=\"3276\">Maximum single surge capability<\/p>\n<\/li>\n<li data-start=\"3277\" data-end=\"3302\">\n<p data-start=\"3279\" data-end=\"3302\">Example: 40kA or 65kA<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3304\" data-end=\"3307\" \/>\n<h3 data-start=\"3309\" data-end=\"3345\"><span class=\"ez-toc-section\" id=\"3-voltage-protection-level-up\"><\/span>3. Voltage Protection Level (Up)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3347\" data-end=\"3455\">\n<li data-start=\"3347\" data-end=\"3367\">\n<p data-start=\"3349\" data-end=\"3367\">Clamping voltage<\/p>\n<\/li>\n<li data-start=\"3368\" data-end=\"3400\">\n<p data-start=\"3370\" data-end=\"3400\">Lower Up = better protection<\/p>\n<\/li>\n<li data-start=\"3401\" data-end=\"3455\">\n<p data-start=\"3403\" data-end=\"3427\">Typical Type 2 values:<\/p>\n<ul data-start=\"3430\" data-end=\"3455\">\n<li data-start=\"3430\" data-end=\"3441\">\n<p data-start=\"3432\" data-end=\"3441\">&lt; 1.5kV<\/p>\n<\/li>\n<li data-start=\"3444\" data-end=\"3455\">\n<p data-start=\"3446\" data-end=\"3455\">&lt; 1.8kV<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr data-start=\"3457\" data-end=\"3460\" \/>\n<h3 data-start=\"3462\" data-end=\"3478\"><span class=\"ez-toc-section\" id=\"4-mcov-uc\"><\/span>4. MCOV (Uc)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3480\" data-end=\"3517\">Maximum Continuous Operating Voltage.<\/p>\n<p data-start=\"3519\" data-end=\"3536\">For 400V systems:<\/p>\n<ul data-start=\"3538\" data-end=\"3562\">\n<li data-start=\"3538\" data-end=\"3562\">\n<p data-start=\"3540\" data-end=\"3562\">275V or 385V typical<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3564\" data-end=\"3606\">Incorrect MCOV leads to premature failure.<\/p>\n<hr data-start=\"3608\" data-end=\"3611\" \/>\n<h3 data-start=\"3613\" data-end=\"3638\"><span class=\"ez-toc-section\" id=\"5-response-time-ta\"><\/span>5. Response Time (tA)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"3640\" data-end=\"3728\">\n<li data-start=\"3640\" data-end=\"3679\">\n<p data-start=\"3642\" data-end=\"3679\">Typically &lt; 25ns for MOV-based SPDs<\/p>\n<\/li>\n<li data-start=\"3680\" data-end=\"3728\">\n<p data-start=\"3682\" data-end=\"3728\">Fast response protects sensitive electronics<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3730\" data-end=\"3733\" \/>\n<h2 data-start=\"3735\" data-end=\"3775\"><span class=\"ez-toc-section\" id=\"part-iv-3-pole-vs-4-pole-comparison\"><\/span>Part IV: 3-Pole vs. 4-Pole Comparison<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3777\" data-end=\"4102\">\n<thead data-start=\"3777\" data-end=\"3821\">\n<tr data-start=\"3777\" data-end=\"3821\">\n<th class=\"\" data-start=\"3777\" data-end=\"3787\" data-col-size=\"sm\">Feature<\/th>\n<th class=\"\" data-start=\"3787\" data-end=\"3800\" data-col-size=\"sm\">3-Pole SPD<\/th>\n<th class=\"\" data-start=\"3800\" data-end=\"3821\" data-col-size=\"sm\">4-Pole (3P+N) SPD<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"3869\" data-end=\"4102\">\n<tr data-start=\"3869\" data-end=\"3921\">\n<td data-start=\"3869\" data-end=\"3883\" data-col-size=\"sm\">System Type<\/td>\n<td data-start=\"3883\" data-end=\"3897\" data-col-size=\"sm\">Delta, TN-C<\/td>\n<td data-start=\"3897\" data-end=\"3921\" data-col-size=\"sm\">Wye (Star), TN-S, TT<\/td>\n<\/tr>\n<tr data-start=\"3922\" data-end=\"3965\">\n<td data-start=\"3922\" data-end=\"3935\" data-col-size=\"sm\">Conductors<\/td>\n<td data-start=\"3935\" data-end=\"3948\" data-col-size=\"sm\">L1, L2, L3<\/td>\n<td data-start=\"3948\" data-end=\"3965\" data-col-size=\"sm\">L1, L2, L3, N<\/td>\n<\/tr>\n<tr data-start=\"3966\" data-end=\"4018\">\n<td data-start=\"3966\" data-end=\"3989\" data-col-size=\"sm\">Grounding Protection<\/td>\n<td data-start=\"3989\" data-end=\"3996\" data-col-size=\"sm\">L-PE<\/td>\n<td data-start=\"3996\" data-end=\"4018\" data-col-size=\"sm\">L-N and N-PE (3+1)<\/td>\n<\/tr>\n<tr data-start=\"4019\" data-end=\"4102\">\n<td data-start=\"4019\" data-end=\"4041\" data-col-size=\"sm\">Typical Application<\/td>\n<td data-start=\"4041\" data-end=\"4064\" data-col-size=\"sm\">Motors, Transformers<\/td>\n<td data-start=\"4064\" data-end=\"4102\" data-col-size=\"sm\">Offices, Data Centers, EV Charging<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"4104\" data-end=\"4218\">In modern European and Australian installations, 4-pole (3P+N) is commonly preferred for comprehensive protection.<\/p>\n<hr data-start=\"4220\" data-end=\"4223\" \/>\n<h2 data-start=\"4225\" data-end=\"4263\"><span class=\"ez-toc-section\" id=\"part-v-b2b-sourcing-considerations\"><\/span>Part V: B2B Sourcing Considerations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4265\" data-end=\"4313\">When sourcing industrial 3-phase SPDs, evaluate:<\/p>\n<h3 data-start=\"4315\" data-end=\"4332\"><span class=\"ez-toc-section\" id=\"certification\"><\/span>Certification<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"4334\" data-end=\"4390\">\n<li data-start=\"4334\" data-end=\"4341\">\n<p data-start=\"4336\" data-end=\"4341\">TUV<\/p>\n<\/li>\n<li data-start=\"4342\" data-end=\"4348\">\n<p data-start=\"4344\" data-end=\"4348\">CB<\/p>\n<\/li>\n<li data-start=\"4349\" data-end=\"4355\">\n<p data-start=\"4351\" data-end=\"4355\">CE<\/p>\n<\/li>\n<li data-start=\"4356\" data-end=\"4363\">\n<p data-start=\"4358\" data-end=\"4363\">SAA<\/p>\n<\/li>\n<li data-start=\"4364\" data-end=\"4390\">\n<p data-start=\"4366\" data-end=\"4390\">ISO9001 quality system<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4392\" data-end=\"4426\">Always verify certificate numbers.<\/p>\n<hr data-start=\"4428\" data-end=\"4431\" \/>\n<h3 data-start=\"4433\" data-end=\"4468\"><span class=\"ez-toc-section\" id=\"manufacturing-quality-control\"><\/span>Manufacturing &amp; Quality Control<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4470\" data-end=\"4482\">Key factors:<\/p>\n<ul data-start=\"4484\" data-end=\"4610\">\n<li data-start=\"4484\" data-end=\"4507\">\n<p data-start=\"4486\" data-end=\"4507\">Production capacity<\/p>\n<\/li>\n<li data-start=\"4508\" data-end=\"4542\">\n<p data-start=\"4510\" data-end=\"4542\">Batch-level quality inspection<\/p>\n<\/li>\n<li data-start=\"4543\" data-end=\"4582\">\n<p data-start=\"4545\" data-end=\"4582\">Specialized surge testing equipment<\/p>\n<\/li>\n<li data-start=\"4583\" data-end=\"4610\">\n<p data-start=\"4585\" data-end=\"4610\">Stable long-term supply<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"4612\" data-end=\"4615\" \/>\n<h2 data-start=\"4617\" data-end=\"4660\"><span class=\"ez-toc-section\" id=\"part-vi-procurement-guide-%e2%80%93-5-red-flags\"><\/span>Part VI: Procurement Guide \u2013 5 Red Flags<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol data-start=\"4662\" data-end=\"4868\">\n<li data-start=\"4662\" data-end=\"4700\">\n<p data-start=\"4665\" data-end=\"4700\">Incorrect MCOV for system voltage<\/p>\n<\/li>\n<li data-start=\"4701\" data-end=\"4741\">\n<p data-start=\"4704\" data-end=\"4741\">No thermal disconnection protection<\/p>\n<\/li>\n<li data-start=\"4742\" data-end=\"4787\">\n<p data-start=\"4745\" data-end=\"4787\">Unverified kA ratings (20kA \/ 40kA etc.)<\/p>\n<\/li>\n<li data-start=\"4788\" data-end=\"4833\">\n<p data-start=\"4791\" data-end=\"4833\">Fake or unverifiable certification logos<\/p>\n<\/li>\n<li data-start=\"4834\" data-end=\"4868\">\n<p data-start=\"4837\" data-end=\"4868\">No product liability coverage<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"4870\" data-end=\"4873\" \/>\n<h2 data-start=\"4875\" data-end=\"4910\"><span class=\"ez-toc-section\" id=\"frequently-asked-questions-faq\"><\/span>Frequently Asked Questions (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"4912\" data-end=\"4967\"><span class=\"ez-toc-section\" id=\"do-i-need-an-spd-if-i-already-have-a-lightning-rod\"><\/span>Do I need an SPD if I already have a lightning rod?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4969\" data-end=\"5143\">Yes.<br data-start=\"4973\" data-end=\"4976\" \/>A lightning protection system protects the structure from direct strikes.<br data-start=\"5049\" data-end=\"5052\" \/>An SPD protects internal electrical equipment from induced surges and switching transients.<\/p>\n<hr data-start=\"5145\" data-end=\"5148\" \/>\n<h3 data-start=\"5150\" data-end=\"5216\"><span class=\"ez-toc-section\" id=\"what-is-the-difference-between-type-1-and-type-2-3-phase-spds\"><\/span>What is the difference between Type 1 and Type 2 3-phase SPDs?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"5218\" data-end=\"5383\">\n<li data-start=\"5218\" data-end=\"5268\">\n<p data-start=\"5220\" data-end=\"5268\"><strong data-start=\"5220\" data-end=\"5230\">Type 1<\/strong>: Installed at main service entrance<\/p>\n<\/li>\n<li data-start=\"5269\" data-end=\"5317\">\n<p data-start=\"5271\" data-end=\"5317\"><strong data-start=\"5271\" data-end=\"5281\">Type 2<\/strong>: Installed at distribution boards<\/p>\n<\/li>\n<li data-start=\"5318\" data-end=\"5383\">\n<p data-start=\"5320\" data-end=\"5383\">Combined Type 1+2 units are available for enhanced protection<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"5385\" data-end=\"5388\" \/>\n<h3 data-start=\"5390\" data-end=\"5447\"><span class=\"ez-toc-section\" id=\"can-three-single-phase-spds-replace-one-3-phase-unit\"><\/span>Can three single-phase SPDs replace one 3-phase unit?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5449\" data-end=\"5572\">Technically possible, but not recommended.<br data-start=\"5491\" data-end=\"5494\" \/>A dedicated 3-phase SPD ensures coordinated protection and unified monitoring.<\/p>\n<hr data-start=\"5574\" data-end=\"5577\" \/>\n<h3 data-start=\"5579\" data-end=\"5626\"><span class=\"ez-toc-section\" id=\"how-often-should-a-3-phase-spd-be-replaced\"><\/span>How often should a 3-phase SPD be replaced?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"5628\" data-end=\"5756\">\n<li data-start=\"5628\" data-end=\"5648\">\n<p data-start=\"5630\" data-end=\"5648\">Inspect annually<\/p>\n<\/li>\n<li data-start=\"5649\" data-end=\"5703\">\n<p data-start=\"5651\" data-end=\"5703\">Check status indicator (Green = OK, Red = Replace)<\/p>\n<\/li>\n<li data-start=\"5704\" data-end=\"5756\">\n<p data-start=\"5706\" data-end=\"5756\">Replace after major lightning event if necessary<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5758\" data-end=\"5807\">Modular SPDs allow individual module replacement.<\/p>\n<hr data-start=\"5809\" data-end=\"5812\" \/>\n<h3 data-start=\"5814\" data-end=\"5846\"><span class=\"ez-toc-section\" id=\"what-is-a-31-configuration\"><\/span>What is a 3+1 configuration?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5848\" data-end=\"5864\">In a 4-pole SPD:<\/p>\n<ul data-start=\"5866\" data-end=\"5972\">\n<li data-start=\"5866\" data-end=\"5915\">\n<p data-start=\"5868\" data-end=\"5915\">Three MOVs protect L1, L2, L3 against Neutral<\/p>\n<\/li>\n<li data-start=\"5916\" data-end=\"5972\">\n<p data-start=\"5918\" data-end=\"5972\">One high-capacity GDT protects Neutral against Earth<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5974\" data-end=\"6004\">Common in TN-S and TT systems.<\/p>\n<hr data-start=\"6006\" data-end=\"6009\" \/>\n<h3 data-start=\"6011\" data-end=\"6053\"><span class=\"ez-toc-section\" id=\"is-oemodm-available-for-3-phase-spds\"><\/span>Is OEM\/ODM available for 3-phase SPDs?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6055\" data-end=\"6151\">Private labeling and customized branding options are commonly available from many manufacturers.<\/p>\n<hr data-start=\"6153\" data-end=\"6156\" \/>\n<h2 data-start=\"6158\" data-end=\"6171\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6173\" data-end=\"6271\">A <strong data-start=\"6175\" data-end=\"6202\">3 Phase Surge Protector<\/strong> is a critical component in industrial electrical protection systems.<\/p>\n<p data-start=\"6273\" data-end=\"6431\">Correct selection based on system type, MCOV, discharge capacity, and installation configuration ensures reliable surge protection and operational continuity.<\/p>\n<p data-start=\"6433\" data-end=\"6532\">For wholesale inquiries and technical consultation, contact the LEEYEE team for further assistance.<\/p>\n<p><a href=\"https:\/\/cnspd.com\/download-category\/all\/\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-26994 size-full\" src=\"https:\/\/cnspd.com\/wp-content\/uploads\/2024\/12\/BookCover-3.jpg\" alt=\"SPD catalog\" width=\"600\" height=\"408\" srcset=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2024\/12\/BookCover-3.jpg 600w, https:\/\/www.cnspd.com\/wp-content\/uploads\/2024\/12\/BookCover-3-150x102.jpg 150w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need a 3-phase SPD if I already have a lightning rod?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. A lightning rod (LPS) protects the building structure from direct strikes. An SPD protects the internal electrical equipment from the massive surges induced by those strikes or from grid switching events.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between Type 1 and Type 2 3-phase SPDs?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Type 1 is for the main service entrance (handling direct lightning energy). Type 2 is for distribution boards (handling indirect surges and switching transients). LEEYEE offers Type 1+2 combined units for maximum protection in a single device.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use three single-phase SPDs instead of one 3-phase unit?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"While technically possible, it is not recommended. A dedicated 3-phase unit ensures coordinated protection and often includes a common signaling contact for remote monitoring of all three phases.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How often should I replace a 3-phase SPD?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Most SPDs have a visual indicator (Green = OK, Red = Replace). They should be inspected annually or after any major lightning event. LEEYEE's modular design allows you to replace just the failed module without rewiring the entire base.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the '3+1' configuration?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"In a 4-pole SPD, the 3+1 configuration means three MOVs protect L1, L2, and L3 against Neutral, and one high-capacity GDT protects Neutral against Earth. This is the safest configuration for TT and TN-S systems.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does LEEYEE support OEM\/ODM for 3-phase SPDs?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. We offer Free Custom Design for your logo, color appearance, and packaging, allowing you to build your own premium brand with our TUV-certified technology.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Parafoudre triphas\u00e9 : Le livre blanc d\u00e9finitif pour la s\u00e9curit\u00e9 \u00e9lectrique industrielle et commerciale Dans les syst\u00e8mes \u00e9lectriques industriels et commerciaux, le parasurtenseur triphas\u00e9 (SPD) joue un r\u00f4le essentiel dans la pr\u00e9vention des dommages caus\u00e9s par les surtensions transitoires. Avec l'essor de l'industrie 4.0, les syst\u00e8mes d'automatisation, les automates programmables, les variateurs de fr\u00e9quence et les centres de donn\u00e9es sont devenus tr\u00e8s sensibles \u00e0 la tension....<\/p>","protected":false},"author":18,"featured_media":26002,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,488,422],"tags":[],"class_list":["post-27034","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-surge-protection","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>3 Phase Surge Protector: The Definitive Whitepaper for Industrial &amp; Commercial Electrical Safety | LEEYEE Electrics<\/title>\n<meta name=\"description\" content=\"What is a 3 Phase Surge Protector? This in-depth whitepaper explains 3-phase SPD working principles, Star vs. Delta systems, 3-pole vs. 4-pole wiring configurations, and industrial surge protection selection criteria.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cnspd.com\/fr\/protector-contra-sobretensiones-trifasico\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"3 Phase Surge Protector: The Definitive Whitepaper for Industrial &amp; Commercial Electrical Safety | LEEYEE Electrics\" \/>\n<meta property=\"og:description\" content=\"What is a 3 Phase Surge Protector? 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