{"id":37879,"date":"2022-04-21T09:36:34","date_gmt":"2022-04-21T07:36:34","guid":{"rendered":"https:\/\/toscano.es\/2022\/04\/21\/how-long-does-a-transient-surge-protector-last\/"},"modified":"2022-04-21T09:36:39","modified_gmt":"2022-04-21T07:36:39","slug":"how-long-does-a-transient-surge-protector-last","status":"publish","type":"post","link":"https:\/\/toscano.es\/en\/2022\/04\/21\/how-long-does-a-transient-surge-protector-last\/","title":{"rendered":"How long does a transient surge protector last?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The estimated lifetime or life expectancy of transient surge protective devices is <strong>determined by the maximum discharge current <sub>Imax<\/sub><\/strong>, which indicates the durability of the transient surge arrester. <\/p>\n\n<p class=\"wp-block-paragraph\">It should be taken into account that the surge absorption capacity of the surge arrester is cumulative, <strong>so it is not necessary to change it after<\/strong> each discharge as if it were a fuse. The protector gradually &#8220;wears out&#8221; as it receives these discharges.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"450\" src=\"https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-torres.webp\" alt=\"\" class=\"wp-image-37700\" title=\"\" srcset=\"https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-torres.webp 900w, https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-torres-300x150.webp 300w, https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-torres-768x384.webp 768w, https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-torres-600x300.webp 600w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure>\n\n<div style=\"height:56px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">How do I calculate the life expectancy of a transient surge arrester?<\/h2>\n\n<p class=\"wp-block-paragraph\">The estimated life expectancy of transient surge arresters is determined by the formula:<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Life expectancy = I<sub>max<\/sub>\/ (A<sub>m<\/sub> \u00d7 N<sub>g<\/sub>)<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Where:<\/p>\n\n<ul class=\"wp-block-list\"><li>A<sub>m<\/sub> = area of lightning incidence on buildings<\/li><li>N<sub>g<\/sub> = lightning density per km<sup>2<\/sup> per year<\/li><\/ul>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"wp-block-paragraph\">Let us take, for example, an isolated building in C\u00e1ceres for which we assume an area of lightning incidence on buildings (A<sub>m<\/sub>) equal to 1 (see table below), and a lightning density per km<sup>2<\/sup> per year (N<sub>g<\/sub>), obtained from the map below, equal to 1.5.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Incidence of lightning strikes on A<sub>m<\/sub><\/strong><\/p>\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Close to other buildings or trees in the<br\/>same height or higher<\/td><td class=\"has-text-align-center\" data-align=\"center\">  0,5<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Surrounded by lower buildings<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,75<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Isolated<\/td><td class=\"has-text-align-center\" data-align=\"center\">1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Isolated on a hill or promontory<\/td><td class=\"has-text-align-center\" data-align=\"center\">2<\/td><\/tr><\/tbody><\/table><figcaption>Source: Technical Building Code (CTE) &#8211; SU8 (Safety against lightning)<\/figcaption><\/figure>\n\n<div style=\"height:56px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"900\" height=\"450\" src=\"https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-mapa2.webp\" alt=\"\" class=\"wp-image-37702\" title=\"\" srcset=\"https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-mapa2.webp 900w, https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-mapa2-300x150.webp 300w, https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-mapa2-768x384.webp 768w, https:\/\/toscano.es\/wp-content\/uploads\/2022\/04\/cuanto-dura-un-protector-de-sobretensiones-mapa2-600x300.webp 600w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption>Illustration: Map of impact density on terrain N <br\/>Source: Technical Building Code (CTE) SU8 (Lightning Safety)<\/figcaption><\/figure>\n\n<div style=\"height:56px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Practical example of transient surge arrester lifetime calculation<\/h2>\n\n<p class=\"wp-block-paragraph\">If the Vigivolt <a href=\"https:\/\/toscano.es\/en\/producto\/v2t-15-2\/\">V2T-15<\/a> equipment is installed, with an Imax of 15kA and adding the above data, we use all the variables to perform the following calculation.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Life expectancy<\/strong> =<strong>I<sub>max<\/sub> \/ (A<sub>m<\/sub> \u00d7 N<sub>g<\/sub>) = 15\/(1 \u00d7 1.5) = 10 years<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">In other words, an Imax 15kA surge protector installed in a building of these characteristics in this area will be capable of receiving impacts for approximately 10 years.<\/p>\n\n<p class=\"wp-block-paragraph\">Obviously this is an <strong>approximate calculation<\/strong>, since the density of lightning per km<sup>2<\/sup> per year is not fixed, but varies according to the year. We make the calculation with the map provided in the Technical Building Code (CTE) SU8.<\/p>\n\n<p class=\"wp-block-paragraph\">If you need another type of transient surge protector, you can consult more equipment in OUR <strong><a href=\"https:\/\/toscano.es\/en\/categoria-producto\/vigivolt-en\/transitory\/\">TRANSITORY SURGE PROTECTORS CATALOGUE<\/a><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The estimated lifetime or life expectancy of transient surge protective devices is determined by the maximum discharge current Imax, which indicates the durability of the transient surge arrester. It should be taken into account that the surge absorption capacity of the surge arrester is cumulative, so it is not necessary to change it after each [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":37697,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_angie_page":false,"_mo_disable_npp":"","page_builder":"","footnotes":""},"categories":[242,252,255],"tags":[],"class_list":["post-37879","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured","category-news","category-surge"],"_links":{"self":[{"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/posts\/37879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/comments?post=37879"}],"version-history":[{"count":0,"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/posts\/37879\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/media\/37697"}],"wp:attachment":[{"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/media?parent=37879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/categories?post=37879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/toscano.es\/en\/wp-json\/wp\/v2\/tags?post=37879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}