{"id":2831,"date":"2024-11-21T17:02:32","date_gmt":"2024-11-21T09:02:32","guid":{"rendered":"https:\/\/yr.junj.cc\/?post_type=blog&#038;p=2831"},"modified":"2025-02-25T11:47:30","modified_gmt":"2025-02-25T03:47:30","slug":"what-is-a-fire-safety-switch","status":"publish","type":"blog","link":"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch","title":{"rendered":"C\u00f4ng t\u1eafc an to\u00e0n ch\u00e1y n\u1ed5 l\u00e0 g\u00ec?"},"content":{"rendered":"<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span><span>In daily life and industrial production, fire safety is always an important issue that we cannot ignore. As an important part of the fire protection system, fire safety switches play a crucial role in case of fire. However, with the popularization of photovoltaic(solar) power generation, system safety has gradually received more attention, especially in emergency situations, how to ensure the safety of personnel<\/span><\/span><\/span><span style=\"font-size:10.5000pt\"><span><span>,<\/span><\/span><\/span><span style=\"font-size:10.5000pt\"><span>\u00a0<span>and avoid hidden dangers such as electrical fires has become an urgent problem to be solved.<\/span><\/span><\/span><\/span><\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 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\">M\u1ee5c l\u1ee5c<\/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=\"Chuy\u1ec3n \u0111\u1ed5i m\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/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=\"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch\/#i\" >\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch\/#What_Is_a_Fire_Safety_Switch\" >C\u00f4ng t\u1eafc an to\u00e0n ch\u00e1y n\u1ed5 l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch\/#i-2\" >\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch\/#What_is_the_Connection_Between_a_Fire_Safety_Switch_and_a_Solar_Rapid_Shutdown%EF%BC%9F\" >What is the Connection Between a Fire Safety Switch and a Solar Rapid Shutdown\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch\/#What_Are_the_Requirements_for_Solar_Rapid_Shutdown\" >What Are the Requirements for Solar Rapid Shutdown?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.yroele.com\/vi\/news\/what-is-a-fire-safety-switch\/#What_Are_the_NEC_Rapid_Shutdown_Requirements\" >What Are the NEC Rapid Shutdown Requirements?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 style=\"text-align:justify\"><span class=\"ez-toc-section\" id=\"i\"><\/span>\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h2 style=\"text-align:justify\"><span class=\"ez-toc-section\" id=\"What_Is_a_Fire_Safety_Switch\"><\/span><span style=\"font-size:16pt\"><span style=\"font-family:Arial\"><strong><span style=\"font-size:16.0000pt\"><span style=\"font-family:Arial\">C\u00f4ng t\u1eafc an to\u00e0n ch\u00e1y n\u1ed5 l\u00e0 g\u00ec?<\/span><\/span><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span><span>Fire safety switches, as the name implies, are manual or automatic control switches used in a fire protection system<\/span><\/span><\/span><span style=\"font-size:12.0000pt\"><span><span>,<\/span><\/span><\/span><span style=\"font-size:12.0000pt\"><span>\u00a0<span>to turn on or off the main equipment of the fire protection system, such as sprinklers, pumps, and alarm devices.<\/span><\/span><\/span><span style=\"font-size:12.0000pt\"><span>These switches are typically located at <\/span><\/span><span>emergency exits<\/span><span style=\"font-size:12.0000pt\"><span>, <\/span><\/span><span>fire control rooms<\/span><span style=\"font-size:12.0000pt\"><span>,<\/span><\/span><span style=\"font-size:12.0000pt\"><span>\u00a0or in easily accessible, visible locations, allowing for quick activation of fire<\/span><\/span>\u00a0<span style=\"font-size:12.0000pt\"><span>fighting equipment in the event of a fire. Their purpose is to control the spread of the fire and provide valuable time for personnel evacuation.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>The main functions of a <\/span><\/span><span>fire safety switch<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0include:<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span><span>1<\/span><span>\u3001<\/span><\/span><strong><span>Manual control<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>: Allows personnel to manually activate fire<\/span><\/span>\u00a0<span style=\"font-size:10.5000pt\"><span>fighting equipment, such as water pumps and sprinklers, to extinguish the initial stage of a fire.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span><span>2<\/span><span>\u3001<\/span><\/span><strong><span>Automatic control<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>: Connected to the fire alarm system, automatically triggering fire<\/span><\/span>\u00a0<span style=\"font-size:10.5000pt\"><span>fighting equipment when fire detectors detect a fire source.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span><span>3<\/span><span>\u3001<\/span><\/span><strong><span>Emergency <\/span><\/strong><strong><span><span>cut<\/span><\/span><\/strong><strong>\u00a0<\/strong><strong><span><span>off<\/span><\/span><\/strong><span style=\"font-size:10.5000pt\"><span>: In specific situations, such as when the fire has spread beyond control, it cuts off non<\/span><\/span>\u00a0<span style=\"font-size:10.5000pt\"><span>essential power sources to prevent the fire from spreading further.<\/span><\/span><\/span><\/span><\/p>\n<h2 style=\"text-align:justify\"><span class=\"ez-toc-section\" id=\"i-2\"><\/span>\u00a0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h2 style=\"text-align:justify\"><span class=\"ez-toc-section\" id=\"What_is_the_Connection_Between_a_Fire_Safety_Switch_and_a_Solar_Rapid_Shutdown%EF%BC%9F\"><\/span><span style=\"font-size:16pt\"><span style=\"font-family:Arial\"><strong><span style=\"font-size:16.0000pt\"><span style=\"font-family:\u9ed1\u4f53\"><span style=\"font-family:Arial,Helvetica,sans-serif\">What is the Connection Between a Fire Safety Switch and a Solar Rapid Shutdown<\/span><span style=\"font-family:\u9ed1\u4f53\">\uff1f<\/span><\/span><\/span><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>Although <\/span><\/span><span>fire safety switches<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0V\u00e0 <\/span><\/span><strong><span>solar rapid shutdown systems<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0differ in application scenarios and technical features, they share a common goal of ensuring safety. A <\/span><\/span><strong><span>solar rapid shutdown system<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>, as an essential part of photovoltaic (PV) system safety, is designed to quickly disconnect PV modules in emergencies, reducing system voltage to a safe level. This helps protect personnel from <\/span><\/span><span>electric shock<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0and minimizes fire hazards.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>The functionalities of <\/span><\/span><strong><span>solar rapid shutdown systems<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0are similar to <\/span><\/span><strong><span>fire safety switches<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0in several ways, such as:<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span><span>1<\/span><span>\u3001<\/span><\/span><strong><span>Current disconnection<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>: Both systems respond quickly in emergencies, reducing system voltage or disconnecting current to prevent accidents from escalating and mitigate risks.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span><span>2<\/span><span>\u3001<\/span><\/span><strong><span>Safety protection<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>: A <\/span><\/span><strong><span><span>PV<\/span><\/span><\/strong><strong><span>\u00a0rapid shutdown system<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0protects personnel from <\/span><\/span><span>electric shock<\/span><span style=\"font-size:10.5000pt\"><span>\u00a0by disconnecting connections between PV modules, while a <\/span><\/span><strong><span>fire safety switch<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0activates fire<\/span><\/span>\u00a0<span style=\"font-size:10.5000pt\"><span>fighting equipment to extinguish fires, ensuring the safety of both people and property.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>However, there are distinct differences between the two. A <\/span><\/span><strong><span>solar rapid shutdown system<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0is primarily used in PV systems, while <\/span><\/span><strong><span>fire safety switches<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0are more broadly applied to electrical system protection, particularly for automatic power disconnection in fire and other emergency scenarios beyond the PV field.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>Additionally, <\/span><\/span><strong><span>solar rapid shutdown systems<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0must comply with specific industry standards, such as the <\/span><\/span><strong><span>National Electrical Code (NEC)<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0requirements for rapid shutdown in PV systems. In contrast, <\/span><\/span><strong><span>fire safety switches<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0follow national or local fire safety standards and regulations.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\">\u00a0<\/p>\n<p style=\"text-align:center\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span><img decoding=\"async\" alt=\"\" src=\"\/wp-content\/uploads\/newsimg\/1 What Is a Fire Safety Switch.jpg\" style=\"height:500px;width:500px\" \/><\/span><\/span><\/span><\/span><\/p>\n<h2 style=\"text-align:justify\"><span class=\"ez-toc-section\" id=\"What_Are_the_Requirements_for_Solar_Rapid_Shutdown\"><\/span><span style=\"font-size:16pt\"><span style=\"font-family:Arial\"><strong><span style=\"font-size:16.0000pt\"><span style=\"font-family:Arial\">What Are the Requirements for Solar Rapid Shutdown?<\/span><\/span><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>c\u00e1c <\/span><\/span><span>requirements of solar fast shutdown<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0mainly include the following points:<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>1<\/span><span>\u3001<\/span><\/span><strong><span>Time requirements<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>: A <\/span><\/span><strong><span>thi\u1ebft b\u1ecb t\u1eaft m\u00e1y nhanh<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0must typically activate and, in emergency situations, cut off the current of the <\/span><\/span><span>photovoltaic system<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0within 10 seconds, reducing the voltage to a safe range. This prevents current flow during a fire and avoids electrical sparks from worsening the situation.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span>c\u00e1c <\/span><\/span><strong><span>10<\/span><\/strong><strong>\u00a0<\/strong><strong><span>second time limit<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0is a widely accepted standard based on international guidelines and industry best practices, not just the <\/span><\/span><strong><span>NEC<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>. It ensures fire hazards are addressed promptly, protecting equipment, personnel, firefighters, and other rescue workers.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\">\u00a0<\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span><span>2<\/span><span>\u3001<\/span><\/span><strong><span>Safety requirements<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>: A <\/span><\/span><strong><span>thi\u1ebft b\u1ecb t\u1eaft m\u00e1y nhanh<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0is usually installed outdoors, requiring excellent <\/span><\/span><span>flame retardan<\/span><strong><span>t<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0properties and protective features.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span>The protection level must be at least <\/span><\/span><strong><span>IP65<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>, and the casing material should meet flame retardant standards such as <\/span><\/span><strong><span>UL94V<\/span><\/strong><strong>\u00a0<\/strong><strong><span>0<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>, ensuring durability in harsh environments.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\">\u00a0<\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>3<\/span><span>\u3001<\/span><\/span><strong><span>Equipment compatibility<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>: The <\/span><\/span><strong><span>fast shutdown device<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0must be compatible with other components of the <\/span><\/span><span>photovoltaic system<\/span><span style=\"font-size:12.0000pt\"><span>, including <\/span><\/span><span>inverters<\/span>\u00a0<span style=\"font-size:12.0000pt\"><span>V\u00e0 <\/span><\/span><span>PV modules<\/span><span style=\"font-size:12.0000pt\"><span>.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span>V\u00ec <\/span><\/span><strong><span>centralized inverters<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0V\u00e0 <\/span><\/span><span>string inverters<\/span><span style=\"font-size:10.5000pt\"><span>\u00a0without module<\/span><\/span>\u00a0<span style=\"font-size:10.5000pt\"><span>level shutdown functions, specific devices are required to achieve <\/span><\/span><span>m\u00f4-\u0111un<\/span>\u00a0<span>level fast shutdown<\/span><span style=\"font-size:10.5000pt\"><span>\u00a0capability.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\">\u00a0<\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>4<\/span><span>\u3001<\/span><\/span><strong><span>Signal transmission and reception<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>: The <\/span><\/span><span>fast shutdown function<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0relies on coordination between a <\/span><\/span><span>signal transmitter<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0and a <\/span><\/span><span>receiver<\/span><span style=\"font-size:12.0000pt\"><span>.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span>The transmitter sends the <\/span><\/span><strong><span>rapid shutdown signal<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>\u00a0to DC conductors connecting the <\/span><\/span><span>PV module array<\/span><span style=\"font-size:10.5000pt\"><span>\u00a0and the inverter. The receiver detects these signals and reduces the <\/span><\/span><span>PV module array voltage<\/span><span style=\"font-size:10.5000pt\"><span>\u00a0to below the standard limit within a defined period.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\">\u00a0<\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>5<\/span><span>\u3001<\/span><\/span><strong><span>Certification requirements<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>: Equipment designed for <\/span><\/span><span>m\u00f4-\u0111un<\/span>\u00a0<span>level fast shutdown<\/span><span style=\"font-size:12.0000pt\"><span>\u00a0must comply with relevant certifications to ensure reliability and safety.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span>Examples include <\/span><\/span><span>SunSpec certification<\/span><span style=\"font-size:10.5000pt\"><span>, <\/span><\/span><span>NEC 2017 &#038; 2020 (690.12<\/span><strong><span>)<\/span><\/strong><span style=\"font-size:10.5000pt\"><span>, and other international standards. These certifications validate the functionality and safety of the devices in critical applications.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:center\"><span style=\"font-size:10.5pt\"><span><span style=\"font-size:10.5000pt\"><span><img decoding=\"async\" alt=\"\" src=\"\/wp-content\/uploads\/newsimg\/2 What Are the Requirements for Solar Rapid Shutdown.jpg\" style=\"height:500px;width:500px\" \/><\/span><\/span><\/span><\/span><\/p>\n<h2 style=\"text-align:justify\"><span class=\"ez-toc-section\" id=\"What_Are_the_NEC_Rapid_Shutdown_Requirements\"><\/span><span style=\"font-size:16pt\"><span style=\"font-family:Arial\"><strong><span style=\"font-size:16.0000pt\"><span style=\"font-family:Arial\">What Are the NEC Rapid Shutdown Requirements?<\/span><\/span><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>trong <\/span><\/span><strong><span>National Electrical Code (NEC)<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>, the requirements for <\/span><\/span><strong><span>t\u1eaft m\u00e1y nhanh ch\u00f3ng<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0of photovoltaic (PV) systems are primarily outlined in <\/span><\/span><a href=\"https:\/\/codes.iccsafe.org\/s\/ISEP2018\/national-electrical-code-nec-solar-provisions\/ISEP2018-NEC-Sec690.12\" target=\"_blank\" rel=\"noopener\"><strong><span>Section 690.12<\/span><\/strong><\/a><span style=\"font-size:12.0000pt\"><span><a href=\"https:\/\/codes.iccsafe.org\/s\/ISEP2018\/national-electrical-code-nec-solar-provisions\/ISEP2018-NEC-Sec690.12\" target=\"_blank\" rel=\"noopener\">, <\/a>focusing on the safety of <\/span><\/span><strong><span>DC power<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0in PV systems.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>\u2013 <\/span><\/span><strong><span>2014 NEC 690.12<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>:<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>This was the first time <\/span><\/span><strong><span>rapid shutdown requirements<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0were introduced for PV systems. It mandated that all PV systems installed on buildings must include a <\/span><\/span><strong><span>rapid shutdown switch<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0to enhance safety during emergencies.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>\u2013 <\/span><\/span><strong><span>2017 NEC 690.12<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>:<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>The requirements became stricter, specifying voltage limits within defined boundaries. Within <\/span><\/span><strong><span>1 foot of the PV array boundary<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>, the <\/span><\/span><strong><span>thi\u1ebft b\u1ecb t\u1eaft m\u00e1y nhanh<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0must reduce the voltage to <\/span><\/span><strong><span>80V or less<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0within <\/span><\/span><strong><span>30 seconds<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0after activation. For areas outside this boundary, the voltage must drop to <\/span><\/span><strong><span>30V or less<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>. This introduced the need for <\/span><\/span><strong><span>m\u00f4-\u0111un<\/span><\/strong><strong>\u00a0<\/strong><strong><span>level rapid shutdown<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>, significantly improving safety standards.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span><span>\u2013 <\/span><\/span><strong><span>2020 NEC<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>: <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>The terminology was expanded, introducing the concept of <\/span><\/span><strong><span>PV hazard control systems<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>. These systems aim to ensure that PV systems can be brought into a <\/span><\/span><strong><span>controlled state<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0during emergencies, effectively safeguarding personnel and equipment.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:left\"><span style=\"font-size:12pt\"><span><span style=\"font-size:12.0000pt\"><span>This evolution of <\/span><\/span><strong><span>NEC rapid shutdown standards<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0reflects growing attention to <\/span><\/span><strong><span>firefighter safety<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>, <\/span><\/span><strong><span>emergency response protocols<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>, and the need to reduce risks associated with <\/span><\/span><strong><span>PV systems<\/span><\/strong><span style=\"font-size:12.0000pt\"><span>\u00a0in critical situations.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify\">\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>In daily life and industrial production, fire safety is always an important issue that we cannot ignore. As an important part of the fire protection system, fire safety switches play a crucial role in case of fire. However, with the popularization of photovoltaic(solar) power generation, system safety has gradually received more attention, especially in emergency situations, how to ensure the safety of personnel,\u00a0and avoid hidden dangers such as electrical fires has become an urgent problem to be solved.<\/p>","protected":false},"featured_media":3063,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[19],"class_list":["post-2831","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog\/2831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/types\/blog"}],"version-history":[{"count":4,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog\/2831\/revisions"}],"predecessor-version":[{"id":3652,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog\/2831\/revisions\/3652"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/media\/3063"}],"wp:attachment":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/media?parent=2831"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog_category?post=2831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}