{"id":3456,"date":"2026-05-17T09:00:00","date_gmt":"2026-05-17T01:00:00","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/blog\/thermal-magnetic-circuit-breaker-how-it-works\/"},"modified":"2026-10-15T11:13:22","modified_gmt":"2026-10-15T03:13:22","slug":"thermal-magnetic-circuit-breaker-how-it-works","status":"publish","type":"post","link":"https:\/\/w9-group.com\/ru\/blog\/thermal-magnetic-circuit-breaker-how-it-works\/","title":{"rendered":"What is a Thermal Magnetic Circuit Breaker and How Does It Work?"},"content":{"rendered":"<div class=\"wp-block-wrap\">\n<p>When a maintenance team asks what a thermal magnetic circuit breaker does, it usually needs a practical explanation of overload response, short-circuit response and the limits of each mechanism. <strong>Is decision<\/strong> is a two-part protection method, not a guarantee that every fault will be cleared under every installation condition.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2026-05-20\/90857975757ed9da550235d81d966bb4.jpeg\" alt=\"What is a Thermal Magnetic Circuit Breaker and How Does It Work?\" itemprop=\"image\"><\/figure>\n<p>Quick answer: the thermal element uses heating from current to create a time-delayed overload response, while the magnetic element responds to a high-current event with a much shorter delay. The actual trip curve depends on the device, ambient conditions, current level and installation. Verify the product curve and coordination study before selecting a breaker.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>Thermal Overload Release<\/h2>\n<p>A bimetal or equivalent thermal mechanism responds to heating caused by sustained overcurrent. It normally allows a short overload without an instantaneous trip, then moves the trip mechanism when the thermal condition persists. Ambient temperature, enclosure heat and conductor installation can affect the result. <strong>a decision<\/strong> should be read from the manufacturer curve, not guessed from the handle position. See <a href=\"\/ru\/%d0%bc%d0%ba%d0%ba%d0%b1\/\">MCCB protection category<\/a> \u043f\u043e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0443 \u0438\u043b\u0438 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0443.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>Magnetic Short-Circuit Release<\/h2>\n<p>The magnetic release reacts to a high-current event and is intended to operate quickly when the current reaches its magnetic threshold. Motor starting, transformer inrush and capacitor charging can make instantaneous settings important. A magnetic element is not a substitute for a residual-current device or a complete protection study. See <a href=\"\/ru\/blog\/thermal-magnetic-mccb-selection\/\">thermal-magnetic MCCB selection<\/a> \u043f\u043e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0443 \u0438\u043b\u0438 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0443.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2026-05-20\/d14b117c48fc58db0e0bf1338eb9a4d4.jpeg\" alt=\"What is a Thermal Magnetic Circuit Breaker and How Does It Work?\" itemprop=\"image\"><\/figure>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>Thermal-Magnetic Protection Limits<\/h2>\n<p>A breaker must have a suitable voltage, current, pole arrangement and interrupting rating. The prospective fault current, conductor impedance, enclosure and coordination with other devices determine whether the selected curve fits the installation. <strong>Thermal decision<\/strong> means checking the complete circuit rather than treating the breaker as an isolated component. See <a href=\"\/ru\/blog\/mccb-breaker-selection-guide\/\">MCCB selection guide<\/a> \u043f\u043e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0443 \u0438\u043b\u0438 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0443.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>Standards and test evidence<\/h2>\n<p>IEC 60947-2:2024 publishes the scope for low-voltage circuit-breakers up to the stated AC and DC limits. IEC 60364-4-43:2023 addresses installation overcurrent protection and coordination. A standard reference is not a model certificate; request the exact product documents and keep installation records separate.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>Thermal-Magnetic Breaker Specifications<\/h2>\n<p>Provide load current, conductor data, fault level, inrush profile, voltage, poles, ambient range, enclosure and coordination target. For a W9 thermal-magnetic MCCB, confirm the exact WLM6 series rating and trip information from the product documentation. <strong>Magnetic decision<\/strong> \u0412\u0438\u0436 <a href=\"\/ru\/contact-us\/\">request a thermal-magnetic MCCB review<\/a> \u043f\u043e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0443 \u0438\u043b\u0438 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0443.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>Breaker Selection Records<\/h2>\n<p>\u041d\u0430 \u044d\u0442\u0430\u043f\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0443\u043a\u0430\u0437\u0430\u0442\u044c \u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0443 \u0438 \u043d\u0435\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u0435 \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u0434 \u0432\u044b\u0431\u043e\u0440\u043e\u043c \u043d\u043e\u043c\u0435\u0440\u0430 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430. \u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u0443\u043a\u0430\u0436\u0438\u0442\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b, \u0447\u0430\u0441\u0442\u043e\u0442\u0443, \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u044b\u0439 \u0442\u043e\u043a, \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u043f\u043e\u043b\u044e\u0441\u043e\u0432, \u043f\u0440\u043e\u0433\u043d\u043e\u0437\u043d\u044b\u0439 \u0442\u043e\u043a \u043a\u043e\u0440\u043e\u0442\u043a\u043e\u0433\u043e \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u044f, \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0443 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438, \u0443\u0441\u043b\u043e\u0432\u0438\u044f \u043e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0435\u0439 \u0441\u0440\u0435\u0434\u044b \u0438 \u043a\u043e\u0440\u043f\u0443\u0441 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f. \u042d\u0442\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u0435\u0442 \u0435\u0434\u0438\u043d\u0443\u044e \u043e\u0441\u043d\u043e\u0432\u0443 \u0434\u043b\u044f \u0432\u0441\u0435\u0445 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438 \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0442\u043e, \u0447\u0442\u043e\u0431\u044b \u043e\u0434\u0438\u043d \u043f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a \u043e\u0442\u0432\u0435\u0447\u0430\u043b \u043d\u0430 \u0440\u0430\u0437\u043d\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0440\u0430\u0437\u043d\u044b\u0445 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0439 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f.<\/p>\n<p>\u041d\u0430 \u044d\u0442\u0430\u043f\u0435 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0437\u0430\u044f\u0432\u043a\u0438 \u043f\u0440\u043e\u0441\u0438\u0442\u0435 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u0443\u044e \u0442\u0430\u0431\u043b\u0438\u0446\u0443 \u0441 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0430\u043c\u0438, \u043a\u043e\u0434 \u043c\u043e\u0434\u0435\u043b\u0438, \u044d\u0441\u043a\u0438\u0437\u043d\u0443\u044e \u0441\u0445\u0435\u043c\u0443, \u0440\u0430\u0441\u043f\u043e\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u043b\u043e\u0432, \u0433\u0440\u0430\u0444\u0438\u043a \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442\u0443\u044e\u0449\u0438\u0445 \u0434\u0435\u0442\u0430\u043b\u0435\u0439, \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u0437\u0430\u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432, \u0438\u0441\u043f\u044b\u0442\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0441\u043f\u0435\u043a\u0442\u0440 \u0438 \u043f\u0435\u0440\u0435\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u043d\u0443\u044e \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044e. \u0421\u0440\u0430\u0432\u043d\u0438\u0432\u0430\u0439\u0442\u0435 \u043f\u043e \u0432\u0441\u0435\u043c \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430\u043c: \u0444\u0438\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e, \u0441\u044a\u0435\u043c\u043d\u043e\u0435 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e \u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e \u0441 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u0432\u044f\u0437\u0438 \u2014 \u044d\u0442\u043e \u0440\u0430\u0437\u043d\u044b\u0435 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u044b \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u0434\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u043e\u0431\u0449\u0430\u044f \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0430 \u0442\u043e\u043a\u0430 \u0441\u0445\u043e\u0436\u0430. \u0417\u0430\u043f\u0438\u0441\u044b\u0432\u0430\u0439\u0442\u0435, \u0447\u0442\u043e \u0432\u0445\u043e\u0434\u0438\u0442 \u0432 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442, \u0447\u0442\u043e \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u043f\u0446\u0438\u043e\u043d\u043d\u044b\u043c \u0438 \u0447\u0442\u043e \u0434\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u0442\u044c \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439-\u0438\u0437\u0433\u043e\u0442\u043e\u0432\u0438\u0442\u0435\u043b\u0435\u043c \u043f\u0430\u043d\u0435\u043b\u0435\u0439.<\/p>\n<p>\u041d\u0430 \u044d\u0442\u0430\u043f\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 \u0438 \u0432\u0432\u043e\u0434\u0430 \u0432 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044e \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0434\u0438\u0442\u044c \u0444\u0438\u0437\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0438\u0434\u0435\u043d\u0442\u0438\u0447\u043d\u043e\u0441\u0442\u044c, \u043c\u043e\u043d\u0442\u0430\u0436, \u043f\u0440\u043e\u043a\u043b\u0430\u0434\u043a\u0443 \u043a\u0430\u0431\u0435\u043b\u0435\u0439, \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0443, \u043c\u043e\u043c\u0435\u043d\u0442 \u0437\u0430\u0442\u044f\u0436\u043a\u0438, \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u0438 \u0441 \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u043d\u044b\u043c \u043e\u0442\u0447\u0435\u0442\u043e\u043c. \u0415\u0441\u043b\u0438 \u0437\u0430\u044f\u0432\u043a\u0430 \u0432\u044b\u0445\u043e\u0434\u0438\u0442 \u0437\u0430 \u0440\u0430\u043c\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0430, \u043f\u0440\u0435\u043a\u0440\u0430\u0442\u0438\u0442\u0435 \u0432\u044b\u043f\u0443\u0441\u043a \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u0435 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u0440\u0430\u0437\u044a\u044f\u0441\u043d\u0435\u043d\u0438\u0435. \u042d\u0442\u043e\u0442 \u0434\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0431\u043e\u043b\u0435\u0435 \u0446\u0435\u043d\u043d\u044b\u043c, \u0447\u0435\u043c \u043e\u0431\u0449\u0430\u044f \u201c\u0432\u0435\u0440\u0445\u043d\u044f\u044f\u201d \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0430, \u043f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u043c\u0443 \u0438\u043d\u0436\u0435\u043d\u0435\u0440\u0443 \u043f\u043e\u043d\u044f\u0442\u044c, \u043f\u043e\u0447\u0435\u043c\u0443 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e \u0431\u044b\u043b\u043e \u043f\u0440\u0438\u043d\u044f\u0442\u043e \u043a \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u0443.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u042d\u0442\u0430\u043f \u043f\u0440\u043e\u0435\u043a\u0442\u0430<\/th>\n<th>\u0412\u043e\u043f\u0440\u043e\u0441 \u0434\u043b\u044f \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f<\/th>\n<th>\u0414\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0414\u0438\u0437\u0430\u0439\u043d<\/td>\n<td>\u041a\u0430\u043a\u043e\u0435 \u0434\u043e\u043b\u0436\u043d\u043e\u0441\u0442\u043d\u043e\u0435 \u0438 \u0434\u043e\u043b\u0436\u043d\u043e\u0441\u0442\u043d\u043e\u0435 \u043f\u043e\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0435\u043d\u043e?<\/td>\n<td>\u0420\u0430\u0441\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0437\u0430\u0449\u0438\u0442\u044b<\/td>\n<\/tr>\n<tr>\n<td>\u0426\u0438\u0442\u0430\u0442\u0430<\/td>\n<td>\u041a\u0430\u043a\u043e\u0435 \u0438\u043c\u0435\u043d\u043d\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e \u0438 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442\u0443\u044e\u0449\u0438\u0435 \u0432\u0445\u043e\u0434\u044f\u0442 \u0432 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442?<\/td>\n<td>\u041a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0439 \u043b\u0438\u0441\u0442 \u0438 \u0442\u0430\u0431\u043b\u0438\u0446\u0430 \u0441 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f\u0445<\/td>\n<\/tr>\n<tr>\n<td>\u0421\u0431\u043e\u0440\u043a\u0430<\/td>\n<td>\u041f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u043b\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e \u043f\u043e\u0434 \u043f\u0440\u043e\u0432\u0435\u0440\u0435\u043d\u043d\u0443\u044e \u0441\u0445\u0435\u043c\u0443 \u043c\u043e\u043d\u0442\u0430\u0436\u0430?<\/td>\n<td>\u0421\u043f\u0438\u0441\u043a\u0438 \u0447\u0435\u0440\u0442\u0435\u0436\u0435\u0439, \u043a\u0430\u0431\u0435\u043b\u044c\u043d\u044b\u0445 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439 \u0438 \u0441\u0431\u043e\u0440\u043a\u0438<\/td>\n<\/tr>\n<tr>\n<td>\u0412\u0432\u043e\u0434 \u0432 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044e<\/td>\n<td>\u0421\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0442 \u043b\u0438 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u043d\u043e\u043c\u0443 \u043f\u0440\u043e\u0435\u043a\u0442\u0443?<\/td>\n<td>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0438\u0441\u043f\u044b\u0442\u0430\u043d\u0438\u0439, \u0444\u0430\u0439\u043b \u0441 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u043e \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0435 \u0438 \u0433\u0440\u0430\u0444\u0438\u043a \u0440\u0430\u0431\u043e\u0442 \u043d\u0430 \u043e\u0431\u044a\u0435\u043a\u0442\u0435<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u041e\u0431\u0435\u0441\u043f\u0435\u0447\u044c\u0442\u0435 \u043f\u0438\u0441\u044c\u043c\u0435\u043d\u043d\u0443\u044e \u0433\u0440\u0430\u043d\u0438\u0446\u0443 \u0432\u043e\u043a\u0440\u0443\u0433 \u043a\u0430\u0436\u0434\u043e\u0433\u043e \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f. \u0421\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u0438 \u2014 \u044d\u0442\u043e \u043d\u0435 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438; \u0434\u0438\u0441\u043f\u043b\u0435\u0439 \u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u043e\u0439 \u0441\u0432\u044f\u0437\u0438; \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u044f \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u0438 \u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u043d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0439 \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u0438; \u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0438 \u043f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a\u0430 \u2014 \u044d\u0442\u043e \u043d\u0435 \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0438\u0435 \u043f\u043e \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u043e\u043c\u0443 \u043f\u0440\u043e\u0435\u043a\u0442\u0443. \u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0438\u0439 \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0438\u0442\u0435 \u0434\u0430\u043d\u043d\u043e\u0435 \u0437\u0430\u044f\u0432\u043b\u0435\u043d\u0438\u0435 \u0432 \u0437\u0430\u043f\u0440\u043e\u0441 \u043d\u0430 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442 \u0438\u043b\u0438 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0430\u044e\u0449\u0443\u044e \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044e. \u0422\u0430\u043a\u0430\u044f \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0441\u043a\u043e\u0440\u0438\u0442\u044c \u043f\u0440\u043e\u0446\u0435\u0441\u0441 \u0437\u0430\u043a\u0443\u043f\u043a\u0438, \u043f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 \u043d\u0435\u0437\u0430\u043f\u043e\u043b\u043d\u0435\u043d\u043d\u044b\u0435 \u043f\u043e\u043b\u044f \u0441\u0442\u0430\u043d\u043e\u0432\u044f\u0442\u0441\u044f \u0432\u0438\u0434\u0438\u043c\u044b\u043c\u0438 \u0435\u0449\u0435 \u0434\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u0438\u044f \u0437\u0430\u043a\u0430\u0437\u0430.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<\/h2>\n<h3>Does thermal mean slow?<\/h3>\n<p>It usually describes a time-delayed overload response, but the exact curve depends on current, temperature and the model.<\/p>\n<h3>Does magnetic mean instantaneous in every case?<\/h3>\n<p>It is intended for fast high-current operation, but the threshold and delay are model-specific. Read the curve and settings.<\/p>\n<h3>Can this breaker protect against every electrical hazard?<\/h3>\n<p>No. Other risks may require residual-current, surge, isolation or system-level measures.<\/p>\n<h3>What should I provide for selection?<\/h3>\n<p>Provide load, voltage, poles, fault duty, inrush, conductor data, environment and coordination requirements.<\/p>\n<\/div>\n<div class=\"wp-block-wrap\">\n<h2>\u0421\u0441\u044b\u043b\u043a\u0438 \u0438 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0448\u0430\u0433<\/h2>\n<p>\u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0441\u0444\u0435\u0440\u044b \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0435 \u043e\u0431\u0449\u0435\u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0435 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438, \u0430 \u0437\u0430\u0442\u0435\u043c \u0437\u0430\u043f\u0440\u043e\u0441\u0438\u0442\u0435 \u0442\u043e\u0447\u043d\u044b\u0435 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u044b \u043e \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0435 \u0434\u043b\u044f \u0432\u0430\u0448\u0435\u0433\u043e \u043f\u0440\u043e\u0435\u043a\u0442\u0430:<\/p>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/66277\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60947-2:2024<\/a><\/li>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/28432\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60364-4-43:2023<\/a><\/li>\n<li><a href=\"https:\/\/w9-group.com\/ru\/%d0%bc%d0%ba%d0%ba%d0%b1\/\">W9 MCCB category<\/a><\/li>\n<\/ul>\n<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f W9 Group \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442 \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043f\u043e \u0437\u0430\u0449\u0438\u0442\u0435 \u043d\u0438\u0437\u043a\u043e\u0432\u043e\u043b\u044c\u0442\u043d\u044b\u0445 \u0446\u0435\u043f\u0435\u0439 \u0434\u043b\u044f OEM-\u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432 \u043f\u043e \u043c\u043e\u043d\u0442\u0430\u0436\u0443 \u043f\u0430\u043d\u0435\u043b\u0435\u0439 \u0438 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c; \u043f\u0435\u0440\u0435\u0434 \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u043c \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u0438 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0443\u0442\u043e\u0447\u043d\u0438\u0442\u044c \u043c\u043e\u0434\u0435\u043b\u044c, \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438, \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044e \u0438 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f \u0440\u044b\u043d\u043a\u0430 \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f.<\/p>\n<\/div>\n<div class=\"legacy-media\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2026-05-20\/601aa4881e5f2bec8554319917dd145e.jpg\" alt=\"What is a Thermal Magnetic Circuit Breaker and How Does It Work?\" itemprop=\"image\"><\/figure>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2026-01-08\/afd25b830a62c8f0cc9bec6be5cc05a4.jpeg\" alt=\"Top 10 Benefits of Using Molded Case Breakers for Power Safety?\" itemprop=\"image\"><\/figure>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2025-05-15\/acb342820d5027866c1594a7338107a6.png\" alt=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0445 \u043e\u0442\u043b\u0438\u0447\u0438\u0439 \u043c\u0435\u0436\u0434\u0443 \u043a\u043e\u043c\u043c\u0443\u0442\u0430\u0442\u043e\u0440\u0430\u043c\u0438 Acb \u0438 \u043e\u0431\u044b\u0447\u043d\u044b\u043c\u0438 \u043a\u043e\u043c\u043c\u0443\u0442\u0430\u0442\u043e\u0440\u0430\u043c\u0438\" itemprop=\"image\"><\/figure>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2026-01-25\/26a28c02f1aa3dab0f2beb82a188412e.jpeg\" alt=\"10 \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0445 \u0441\u043e\u0432\u0435\u0442\u043e\u0432 \u043f\u043e \u0432\u044b\u0431\u043e\u0440\u0443 \u0437\u0430\u0437\u0435\u043c\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0432\u044b\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u044f?\" itemprop=\"image\"><\/figure>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2025-12-14\/6c9426605fa8b2820449ad670a9ae759.jpeg\" alt=\"Top Trends in Air Circuit Breaker Factory Production for 2025\" itemprop=\"image\"><\/figure>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2025-12-28\/68e7ebd4d25fffed9e029b2f2194e1df.jpeg\" alt=\"Understanding Thermal Magnetic Release MCCB Benefits and Applications\" itemprop=\"image\"><\/figure>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ecdn6.globalso.com\/public\/img\/2025-12-31\/ae366bb2fb41558bd86b257836d85cc1.jpeg\" alt=\"How to Choose the Right Thermal Magnetic Circuit Breaker?\" itemprop=\"image\"><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A thermal magnetic<\/p>","protected":false},"author":1,"featured_media":3774,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3456","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"_links":{"self":[{"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/posts\/3456","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/comments?post=3456"}],"version-history":[{"count":3,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/posts\/3456\/revisions"}],"predecessor-version":[{"id":4429,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/posts\/3456\/revisions\/4429"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/media\/3774"}],"wp:attachment":[{"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/media?parent=3456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/categories?post=3456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/w9-group.com\/ru\/wp-json\/wp\/v2\/tags?post=3456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}