{"id":868,"date":"2023-12-12T15:39:17","date_gmt":"2023-12-12T07:39:17","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&p=868"},"modified":"2024-09-05T16:41:11","modified_gmt":"2024-09-05T08:41:11","slug":"how-to-choose-an-spd","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/da\/blog\/how-to-choose-an-spd\/","title":{"rendered":"S\u00e5dan v\u00e6lger du en SPD"},"content":{"rendered":"Hvorfor k\u00f8be en Surge Protective Device (SPD)?<\/strong>\r\n\r\nEn Surge Protective Device (SPD) er designet til at reducere oversp\u00e6ndingssp\u00e6ndingen, hvilket beskytter udstyr og reducerer reparations- og udskiftningsomkostninger. Hver SPD reducerer oversp\u00e6ndingen til udstyr under en oversp\u00e6nding til et sp\u00e6ndingstestet niveau kendt som Let-Through-Voltage.\r\n\r\nTyper af beskyttelse<\/strong>\r\n\r\nN\u00e5r man diskuterer forskellige typer oversp\u00e6ndingsbeskyttelse, er der tre hovedtyper:\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Type<\/td>\r\nHvad den g\u00f8r<\/td>\r\nHvor skal man bruge det<\/td>\r\n<\/tr>\r\n
Type 1<\/td>\r\nBeskyttelse mod direkte lynnedslag<\/td>\r\nVed str\u00f8mforsyningen til enhver elektrisk installation, hvor ekstern lynbeskyttelse er installeret eller forsynes af luftledninger.<\/td>\r\n<\/tr>\r\n
Type 2<\/td>\r\nOversp\u00e6ndingsbeskyttelse<\/td>\r\nVed str\u00f8mforsyningen til enhver bygning, der ikke har brug for lynbeskyttelse, og til brug p\u00e5 alle undertavler mere end 10-15 meter fra hovedpanelet.<\/td>\r\n<\/tr>\r\n
Type 3<\/td>\r\nSlutudstyrsbeskyttelse<\/td>\r\nP\u00e5 ethvert udstyr, hvor der er behov for en lav gennemgangssp\u00e6nding.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\nHvad er den korrekte m\u00e5de at bestemme, hvilken st\u00f8rrelse SPD der skal bruges i et system?<\/strong>\r\n\r\nSPDs are not one-size-fits-all devices, nor do the sizes of their kA rating (the surge rating) go hand-in-hand with the size of the panel. In other words, do not select an SPD with a maximum kA rating just because the panel is large.\r\n\r\nTo determine which SPD should be used for the system, you must know the reference to the ground as well as the type of voltage that is present. Therefore, a panel designer should first determine the type of electrical system in use, and then calculate the voltage reference to ground. The formula to determine this will depend on the type of system.\r\n\r\nFor example, for a single-phase system (also called a split-phase system), the line-to-line voltage is divided by two. The result is the optimal amount of volts that the SPD should have for that system.\r\n\r\nS\u00e5dan v\u00e6lger du en enhed<\/strong>\r\n
    \r\n \t
  • Er enheden egnet til dit jordingsarrangement?<\/li>\r\n<\/ul>\r\nDette er et af de mest almindelige problemer med SPD-installation. Den vigtigste overvejelse er for TT-systemer, hvor enheden skal v\u00e6re egnet.\r\n
      \r\n \t
    • Beskytter enheden b\u00e5de str\u00f8mf\u00f8rende og neutrale poler?<\/li>\r\n<\/ul>\r\nDer er nogle f\u00e5 enheder p\u00e5 markedet, som kan virke billige sammenlignet med andre enheder, men hvis enheden ikke beskytter b\u00e5de str\u00f8mf\u00f8rende og neutral, kan oversp\u00e6ndinger komme ind i din ejendom og omg\u00e5 SPD'en.\r\n
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      • Hvilken garanti giver producenten?<\/li>\r\n<\/ul>\r\nDette er generelt en n\u00f8gleindikator for kvaliteten af \u200b\u200bde komponenter, der anvendes i SPD'et.\r\n\r\nK\u00f8b af den rigtige oversp\u00e6ndingsbeskyttelsesanordning (SPD).<\/strong>\r\n\r\nMens enhver SPD vil reducere oversp\u00e6ndingsniveauet, der passerer til elektrisk udstyr under en oversp\u00e6ndingsh\u00e6ndelse, har nogle en let-through-voltage, der er for h\u00f8j til at forhindre skade, hvilket er n\u00e6sten det samme som at have ingen beskyttelse overhovedet. BRITEC tilbyder et komplet udvalg af oversp\u00e6ndingsbeskyttelsesanordninger til beskyttelse af elektrisk udstyr. BRITEC Surge Protective Devices er det rigtige valg til alle virksomheder og hjem.","protected":false},"featured_media":870,"parent":0,"menu_order":143,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-868","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"A Surge Protective Device (SPD) is designed to reduce surge voltage, which protects equipment and reduces repair and replacement costs. Every SPD reduces the surge voltage to equipment during a surge to a voltage tested level known as Let-Through-Voltage.","txt":"Why Purchase a Surge Protective Device (SPD)?<\/strong>\r\n\r\nA Surge Protective Device (SPD) is designed to reduce surge voltage, which protects equipment and reduces repair and replacement costs. Every SPD reduces the surge voltage to equipment during a surge to a voltage tested level known as Let-Through-Voltage.\r\n\r\nTypes of Protection<\/strong>\r\n\r\nWhen discussing di\ufb00erent types of surge protection, there are three main types:\r\n\r\n\r\n\r\n\r\n\r\n\r\n
        Type<\/td>\r\nWhat it does<\/td>\r\nWhere to use it<\/td>\r\n<\/tr>\r\n
        Type 1<\/td>\r\nProtection against direct Lightning strikes<\/td>\r\nAt the mains incomer of any electrical installation where external Lightning Protection is installed, or is fed by overhead lines.<\/td>\r\n<\/tr>\r\n
        Type 2<\/td>\r\nSurge Protection<\/td>\r\nAt the mains incomer of any building that doesn\u2019t need any lightning protection, and for use on any sub boards more than 10-15 meters from the main panel.<\/td>\r\n<\/tr>\r\n
        Type 3<\/td>\r\nEnd equipment protection<\/td>\r\nOn any piece of equipment where a low let through voltage is needed.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\nWhat is the correct way to determine which size of SPD to use in a system?<\/strong>\r\n\r\nSPDs are not one-size-fits-all devices, nor do the sizes of their kA rating (the surge rating) go hand-in-hand with the size of the panel. In other words, do not select an SPD with a maximum kA rating just because the panel is large.\r\n\r\nTo determine which SPD should be used for the system, you must know the reference to the ground as well as the type of voltage that is present. Therefore, a panel designer should first determine the type of electrical system in use, and then calculate the voltage reference to ground. The formula to determine this will depend on the type of system.\r\n\r\nFor example, for a single-phase system (also called a split-phase system), the line-to-line voltage is divided by two. The result is the optimal amount of volts that the SPD should have for that system.\r\n\r\nHow to choose a device<\/strong>\r\n
          \r\n \t
        • Is the device suitable for your earthing arrangement?<\/li>\r\n<\/ul>\r\nThis is one of the most common issues with SPD installation. The most important consideration is for TT systems, where the device needs to be suitable.\r\n
            \r\n \t
          • Is the device protecting both the live & neutral poles?<\/li>\r\n<\/ul>\r\nThere are a few devices on the market with may seem inexpensive compared to other devices, but if the device is not protecting both live & neutral, surges may enter your property and bypass the SPD.\r\n
              \r\n \t
            • What warranty does the manufacturer provide?<\/li>\r\n<\/ul>\r\nThis is generally a key indicator of the quality of the components used in the SPD.\r\n\r\nPurchasing the Right Surge Protective Device (SPD).<\/strong>\r\n\r\nWhile any SPD will reduce the surge voltage level passing to electrical equipment during a surge event, some have a Let-Through-Voltage that is too high to prevent damage, which is almost the same as having no protection at all. BRITEC offers a complete range of surge protective devices to protect electrical equipment. BRITEC Surge Protective Devices are the right choice for all businesses and homes."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/blog\/868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/media\/870"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/media?parent=868"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/blog_category?post=868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}