{"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\/pt\/blog\/how-to-choose-an-spd\/","title":{"rendered":"Como escolher um SPD"},"content":{"rendered":"Por que comprar um dispositivo de prote\u00e7\u00e3o contra surtos (SPD)?<\/strong>\r\n\r\nUm dispositivo de prote\u00e7\u00e3o contra sobretens\u00e3o (SPD) \u00e9 projetado para reduzir a tens\u00e3o de sobretens\u00e3o, o que protege o equipamento e reduz os custos de reparo e substitui\u00e7\u00e3o. Cada SPD reduz a tens\u00e3o de surto no equipamento durante um surto para um n\u00edvel testado de tens\u00e3o conhecido como Let-Through-Voltage.\r\n\r\nTipos de prote\u00e7\u00e3o<\/strong>\r\n\r\nAo discutir diferentes tipos de prote\u00e7\u00e3o contra surtos, existem tr\u00eas tipos principais:\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Tipo<\/td>\r\nO que isso faz<\/td>\r\nOnde usar<\/td>\r\n<\/tr>\r\n
Tipo 1<\/td>\r\nProte\u00e7\u00e3o contra quedas diretas de raios<\/td>\r\nNa entrada da rede de qualquer instala\u00e7\u00e3o el\u00e9trica onde esteja instalada prote\u00e7\u00e3o externa contra raios ou seja alimentada por linhas a\u00e9reas.<\/td>\r\n<\/tr>\r\n
Tipo 2<\/td>\r\nProte\u00e7\u00e3o contra surtos<\/td>\r\nNa entrada da rede el\u00e9trica de qualquer edif\u00edcio que n\u00e3o necessite de prote\u00e7\u00e3o contra raios e para uso em quaisquer subquadros a mais de 10-15 metros do painel principal.<\/td>\r\n<\/tr>\r\n
Tipo 3<\/td>\r\nProte\u00e7\u00e3o final do equipamento<\/td>\r\nEm qualquer equipamento onde seja necess\u00e1ria uma baixa tens\u00e3o de passagem.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\nQual \u00e9 a maneira correta de determinar qual tamanho de SPD usar em um sistema?<\/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\nComo escolher um dispositivo<\/strong>\r\n
    \r\n \t
  • O dispositivo \u00e9 adequado para o seu arranjo de aterramento?<\/li>\r\n<\/ul>\r\nEste \u00e9 um dos problemas mais comuns com a instala\u00e7\u00e3o do SPD. A considera\u00e7\u00e3o mais importante \u00e9 para sistemas TT, onde o dispositivo precisa ser adequado.\r\n
      \r\n \t
    • O dispositivo est\u00e1 protegendo os p\u00f3los ativo e neutro?<\/li>\r\n<\/ul>\r\nExistem alguns dispositivos no mercado que podem parecer baratos em compara\u00e7\u00e3o com outros dispositivos, mas se o dispositivo n\u00e3o estiver protegendo tanto a tens\u00e3o quanto o neutro, surtos podem entrar em sua propriedade e contornar o SPD.\r\n
        \r\n \t
      • Que garantia o fabricante oferece?<\/li>\r\n<\/ul>\r\nEste \u00e9 geralmente um indicador chave da qualidade dos componentes utilizados no SPD.\r\n\r\nAdquirindo o dispositivo de prote\u00e7\u00e3o contra surtos (SPD) correto.<\/strong>\r\n\r\nEmbora qualquer SPD reduza o n\u00edvel de tens\u00e3o de surto que passa para o equipamento el\u00e9trico durante um evento de surto, alguns t\u00eam uma tens\u00e3o de passagem que \u00e9 muito alta para evitar danos, o que \u00e9 quase o mesmo que n\u00e3o ter nenhuma prote\u00e7\u00e3o. A BRITEC oferece uma linha completa de dispositivos de prote\u00e7\u00e3o contra surtos para proteger equipamentos el\u00e9tricos. Os dispositivos de prote\u00e7\u00e3o contra surtos BRITEC s\u00e3o a escolha certa para todas as empresas e resid\u00eancias.","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\/pt\/wp-json\/wp\/v2\/blog\/868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/media\/870"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/media?parent=868"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog_category?post=868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}