{"id":742,"date":"2025-08-28T14:47:02","date_gmt":"2025-08-28T14:47:02","guid":{"rendered":"https:\/\/cnkuangya.com\/?page_id=742"},"modified":"2025-09-17T08:57:32","modified_gmt":"2025-09-17T08:57:32","slug":"ac-circuit-breaker","status":"publish","type":"page","link":"https:\/\/cnkuangya.com\/ar\/ac-circuit-breaker\/","title":{"rendered":"\u0642\u0627\u0637\u0639 \u062f\u0627\u0626\u0631\u0629 \u062a\u064a\u0627\u0631 \u0645\u062a\u0631\u062f\u062f"},"content":{"rendered":"<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-88a751d\" data-block-id=\"88a751d\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-88a751d-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-0ea088d\" data-v=\"4\" data-block-id=\"0ea088d\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-0ea088d-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-0ea088d-inner-blocks\">\n<!-- ============= \/ac-circuit-breakers\/ \u2014 AC CIRCUIT BREAKER HUB (Kuangya) ============= -->\n<section id=\"ky-ac-hub\" class=\"kb-wrap\" aria-label=\"AC Circuit Breakers Hub\">\n  <style>\n    :root{\n      --brand:#B5220E; 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AFDD<\/h1>\n      <p class=\"kb-sub\">Overview of four protection layers for AC distribution: <strong>overcurrent (MCB)<\/strong>, <strong>residual current (RCCB)<\/strong>, the <strong>combined RCBO<\/strong>, \u0648 <strong>\u0643\u0634\u0641 \u0623\u0639\u0637\u0627\u0644 \u0627\u0644\u0642\u0648\u0633 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a (AFDD)<\/strong>. Use the cards below to jump to the right category page.<\/p>\n      <div class=\"kb-cta\">\n        <a class=\"kb-btn primary\" href=\"#kb-categories\">See Categories<\/a>\n        <a class=\"kb-btn\" href=\"#kb-compare\">\u0645\u0642\u0627\u0631\u0646\u0629 \u0633\u0631\u064a\u0639\u0629<\/a>\n      <\/div>\n      <nav class=\"kb-bc\" aria-label=\"Breadcrumb\">\n        <a href=\"\/ar\/\">\u0627\u0644\u0635\u0641\u062d\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/a> \/ <span>\u0642\u0648\u0627\u0637\u0639 \u062f\u0648\u0627\u0626\u0631 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u062a\u0631\u062f\u062f<\/span>\n      <\/nav>\n    <\/div>\n  <\/div>\n\n  <!-- ===== SEC2 \u2014 CATEGORY CARDS ===== -->\n  <div id=\"kb-categories\" class=\"kb-cards\">\n    <div class=\"kb-container\">\n      <div class=\"kb-grid\">\n        <!-- MCB (AC) -->\n        <article class=\"kb-card\">\n          <span class=\"kb-chip\">Overcurrent \u2022 AC<\/span>\n          <h3>MCB \u2014 Miniature Circuit Breaker<\/h3>\n          <p>Protects against overloads and short circuits (thermal-magnetic). Choose poles, rated current, and trip curve (B\/C\/D).<\/p>\n          <a class=\"go\" href=\"\/ar\/MCB\/\" aria-label=\"Go to MCB category\">See Category \u2192<\/a>\n        <\/article>\n        <!-- RCCB (AC) -->\n        <article class=\"kb-card\">\n          <span class=\"kb-chip\">Residual Current \u2022 AC<\/span>\n          <h3>RCCB \u2014 Residual Current Circuit Breaker<\/h3>\n          <p>Leakage protection only (no overcurrent). Requires upstream MCB\/MCCB. Select type (AC\/A\/F\/B\/B+), sensitivity (I\u0394n), and poles.<\/p>\n          <a class=\"go\" href=\"\/ar\/RCCB\/\" aria-label=\"Go to RCCB category\">Selection Guide \u2192<\/a>\n        <\/article>\n        <!-- RCBO (AC) -->\n        <article class=\"kb-card\">\n          <span class=\"kb-chip\">Residual + Overcurrent \u2022 AC<\/span>\n          <h3>RCBO \u2014 Combined Protection<\/h3>\n          <p>Integrates MCB + RCD in one device. Ideal for terminal circuits that need both fault-current and overload\/short-circuit protection.<\/p>\n          <a class=\"go\" href=\"\/ar\/RCBO\/\" aria-label=\"Go to RCBO category\">See Category \u2192<\/a>\n        <\/article>\n        <!-- AFDD (AC) -->\n        <article class=\"kb-card\">\n          <span class=\"kb-chip\">Arc Fault \u2022 AC<\/span>\n          <h3>AFDD \u2014 Arc Fault Detection Device<\/h3>\n          <p>Detects series\/parallel arcing patterns to reduce fire risk. Often coordinated with RCBO\/MCB in bedrooms and other sensitive areas.<\/p>\n          <a class=\"go\" href=\"\/ar\/AFDD\/\" aria-label=\"Go to AFDD category\">Learn More \u2192<\/a>\n        <\/article>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- ===== SEC3 \u2014 QUICK COMPARISON (AC) ===== -->\n  <div id=\"kb-compare\" class=\"kb-sec\">\n    <div class=\"kb-container\">\n      <h2>Quick Comparison (AC 50\/60 Hz)<\/h2>\n      <p class=\"lead\">Core functions, pole options, and typical use. Detailed specs live on the category pages.<\/p>\n      <div class=\"kb-table-wrap\">\n        <table class=\"kb-table\" aria-label=\"AC breaker type comparison\">\n          <thead>\n            <tr>\n              <th>\u0627\u0644\u0646\u0648\u0639<\/th>\n              <th>\u064a\u062d\u0645\u064a \u0645\u0646<\/th>\n              <th>Typical Poles<\/th>\n              <th>Common Settings<\/th>\n              <th>Typical Use (AC)<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td><a href=\"\/ar\/MCB\/\" class=\"kb-badge\">MCB<\/a><\/td>\n              <td>Overload &#038; short-circuit (thermal-magnetic)<\/td>\n              <td>1\u0635 \/ 1\u0635 \/ 2\u0635 \/ 3\u0635 \/ 4\u0635<\/td>\n              <td>In (e.g., 6\u2013125A), Trip curve B\/C\/D<\/td>\n              <td>Feeders &#038; branch circuits; coordinate with RCCB\/RCBO\/AFDD<\/td>\n            <\/tr>\n            <tr>\n              <td><a href=\"\/ar\/RCCB\/\" class=\"kb-badge\">RCCB<\/a><\/td>\n              <td>Residual (earth) current only<\/td>\n              <td>2 \u0641-2\/\u0641-4<\/td>\n              <td>I\u0394n 10\/30\/100\/300 mA; Type AC\/A\/F\/B\/B+; S (selective)<\/td>\n              <td>Personnel protection; needs upstream MCB\/MCCB<\/td>\n            <\/tr>\n            <tr>\n              <td><a href=\"\/ar\/RCBO\/\" class=\"kb-badge\">RCBO<\/a><\/td>\n              <td>Residual + overcurrent (combined)<\/td>\n              <td>1P+N \/ 2P \/ 3P+N \/ 4P<\/td>\n              <td>In, I\u0394n 10\/30\/100\/300 mA; Type AC\/A\/F\/B<\/td>\n              <td>Terminal circuits needing both protections in one<\/td>\n            <\/tr>\n            <tr>\n              <td><a href=\"\/ar\/AFDD\/\" class=\"kb-badge\">AFDDD<\/a><\/td>\n              <td>Arc-fault (series\/parallel) pattern detection<\/td>\n              <td>1P+N \/ 2P (by series)<\/td>\n              <td>Coordination with RCBO\/MCB; installation guidelines<\/td>\n              <td>Bedrooms, aging wiring, combustible storage, IT rooms<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- ===== SEC4 \u2014 CHOOSE BY APPLICATION (AC) ===== -->\n  <div class=\"kb-sec\">\n    <div class=\"kb-container\">\n      <h2>Choose by AC Application<\/h2>\n      <p class=\"lead\">Jump to the most relevant category selector.<\/p>\n      <div class=\"kb-use\">\n        <a href=\"\/ar\/RCBO\/#selector\" aria-label=\"Residential and terminal circuits\">Residential \/ terminal circuits \u2192 RCBO<\/a>\n        <a href=\"\/ar\/RCCB\/#selection\" aria-label=\"Industrial personnel protection\">Industrial personnel protection \u2192 RCCB<\/a>\n        <a href=\"\/ar\/MCB\/#selection\" aria-label=\"Feeders and branch circuits\">Feeders &#038; branch circuits \u2192 MCB<\/a>\n        <a href=\"\/ar\/AFDD\/#guide\" aria-label=\"High fire-risk areas\">High fire-risk areas \u2192 AFDD<\/a>\n        <a href=\"\/ar\/RCBO\/#type-b\" aria-label=\"EV\/VFD\/DC leakage scenarios\">EV\/VFD\/DC leakage \u2192 RCBO Type B\/F<\/a>\n        <a href=\"\/ar\/RCCB\/#selective\" aria-label=\"Selective coordination\">Selective coordination \u2192 RCCB S<\/a>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- ===== SEC5 \u2014 PROTECTION STACK \/ RELATED PAGES (AC) ===== -->\n  <div class=\"kb-sec\">\n    <div class=\"kb-container\">\n      <h2>Protection Stack &#038; Coordination (AC)<\/h2>\n      <p class=\"lead\">Layer fault and surge protection for robust AC systems.<\/p>\n      <div class=\"kb-chips\">\n        <a class=\"kb-chip brand\" href=\"\/ar\/AC-SPD\/\">AC SPD<\/a>\n        <a class=\"kb-chip\" href=\"\/ar\/MCB\/\">MCB<\/a>\n        <a class=\"kb-chip\" href=\"\/ar\/RCCB\/\">RCCB<\/a>\n        <a class=\"kb-chip\" href=\"\/ar\/RCBO\/\">RCBO<\/a>\n        <a class=\"kb-chip\" href=\"\/ar\/AFDD\/\">AFDDD<\/a>\n        <a class=\"kb-chip\" href=\"\/ar\/automatic-transfer-switch\/\">\u0627\u0644\u0645\u0646\u0634\u0637\u0627\u062a \u0627\u0644\u0623\u0645\u0641\u064a\u062a\u0627\u0645\u064a\u0646\u064a\u0629<\/a>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- ===== SEC6 \u2014 RESOURCES ===== -->\n  <div class=\"kb-sec\">\n    <div class=\"kb-container\">\n      <h2>Resources<\/h2>\n      <div class=\"kb-list\" role=\"list\">\n        <a href=\"\/ar\/MCB\/#faq\"><span>Trip Curves B\/C\/D \u2014 how to choose<\/span><strong>MCB FAQ<\/strong><\/a>\n        <a href=\"\/ar\/RCCB\/#types\"><span>AC \/ A \/ F \/ B \/ B+ waveform types<\/span><strong>RCCB Types<\/strong><\/a>\n        <a href=\"\/ar\/RCBO\/#selector\"><span>Pole options &#038; sensitivities<\/span><strong>RCBO Selector<\/strong><\/a>\n        <a href=\"\/ar\/AFDD\/#guide\"><span>AFDD coordination with RCBO\/MCB<\/span><strong>AFDD Guide<\/strong><\/a>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- ===== SEC7 \u2014 FAQ (AC Hub) ===== -->\n  <div class=\"kb-sec\" id=\"faq\">\n    <div class=\"kb-container\">\n      <h2>FAQs<\/h2>\n      <details>\n        <summary>What\u2019s the difference between MCB, RCCB, RCBO and AFDD?<\/summary>\n        <div>MCB handles overcurrent; RCCB handles residual current only; RCBO combines both; AFDD detects arc faults. Use the category pages to select models.<\/div>\n      <\/details>\n      <details>\n        <summary>For AC terminal circuits, should I use RCCB or RCBO?<\/summary>\n        <div>RCBO is often preferred because it integrates overcurrent and residual-current protection. RCCB requires an upstream MCB\/MCCB.<\/div>\n      <\/details>\n      <details>\n        <summary>When is AFDD recommended?<\/summary>\n        <div>Where arc faults pose higher fire risks\u2014e.g., bedrooms, aging wiring, combustible storage, or sensitive IT rooms. Coordinate with RCBO\/MCB.<\/div>\n      <\/details>\n    <\/div>\n  <\/div>\n<\/section>\n<!-- ================== END \u2014 AC HUB ================== -->\n\n<\/div><\/div><\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Kuangya \u2022 Low-Voltage AC Protection (50\/60 Hz) AC Circuit Breakers \u2014 MCB, RCCB, RCBO &#038; AFDD Overview of four protection layers for AC distribution: overcurrent (MCB), residual current (RCCB), the combined RCBO, and arc-fault detection (AFDD). Use the cards below to jump to the right category page. See Categories Quick Compare Home \/ AC Circuit [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-742","page","type-page","status-publish","hentry"],"blocksy_meta":{"has_hero_section":"disabled","styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"_links":{"self":[{"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/pages\/742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/comments?post=742"}],"version-history":[{"count":3,"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/pages\/742\/revisions"}],"predecessor-version":[{"id":1602,"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/pages\/742\/revisions\/1602"}],"wp:attachment":[{"href":"https:\/\/cnkuangya.com\/ar\/wp-json\/wp\/v2\/media?parent=742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}