{"id":801,"date":"2023-12-19T16:44:04","date_gmt":"2023-12-19T08:44:04","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=801"},"modified":"2024-09-05T16:34:00","modified_gmt":"2024-09-05T08:34:00","slug":"the-difference-between-lightning-protection-and-surge-protection","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/pt\/blog\/the-difference-between-lightning-protection-and-surge-protection\/","title":{"rendered":"A diferen\u00e7a entre prote\u00e7\u00e3o contra raios e prote\u00e7\u00e3o contra surtos"},"content":{"rendered":"Lightning and surge protection are two elements of an effective electrical protection system.\r\n\r\nLightning is known to be the most significant source of surges\u2014bolts have been recorded to have a million to a billion volts and between 10,000 to 200,000 amps. However, lightning only makes up a portion of all transient events in a facility.\r\n\r\nBecause transients can originate from both external sources (like lightning) and internal sources, facilities ought to have both a lightning protection system and surge protection installed.\r\n\r\n<strong>Sistema de prote\u00e7\u00e3o contra raios<\/strong>\r\n\r\nA lightning protection system protects a structure from a direct lightning strike.\r\n\r\nTo do this, an air terminal (or system of air terminals) is placed in the most probable position to capture the direct strike, based on the structure\u2019s architectural design and roof equipment. The rest of the system is designed to safely convey that electrical energy from the lighting strike to ground as efficiently and safely as possible.\r\n\r\nTo intercept the strike and conduct the high current energy of a lightning strike into the earth, system components include the:\r\n\r\nAir terminal, which is used to intercept the lightning strike.\r\n\r\nDown conductors, providing the most direct path possible to move the electrical energy towards the ground.\r\n\r\nGrounding system, which provides a path for the current to dissipate into the ground and out of harm\u2019s way.\r\n\r\nBonding, meant to reduce the possibility of voltage differences that are a safety risk.\r\n\r\nLightning protection standards ensure how to properly place air terminals, run cable, ground and bond in order to ensure maximum safety in this energy transfer and dissipation.\r\n\r\n<strong>Dispositivo de prote\u00e7\u00e3o contra surtos (SPD)<\/strong>\r\n\r\nUm dispositivo de prote\u00e7\u00e3o contra surtos (SPD) \u00e9 projetado para proteger sistemas e equipamentos el\u00e9tricos contra surtos e eventos transit\u00f3rios, limitando tens\u00f5es transit\u00f3rias e desviando correntes de surto.\r\n\r\n<strong>O que causa transientes e surtos?<\/strong>\r\n\r\nLightning is the most spectacular form of an externally generated surge, however, it is estimated that 65% of all transients are generated internally within the facility by the switching of electrical loads such as:\r\n\r\nLightnings\r\n\r\nHeating systems\r\n\r\nMotors\r\n\r\nOther Inductive loads\r\n\r\n<strong>Como funciona um SPD?<\/strong>\r\n\r\nExiste pelo menos um componente n\u00e3o linear do SPD, que sob diferentes condi\u00e7\u00f5es, transita entre um estado de alta e baixa imped\u00e2ncia. Em tens\u00f5es normais de opera\u00e7\u00e3o, os SPDs est\u00e3o em estado de alta imped\u00e2ncia e n\u00e3o afetam o sistema. Quando ocorre uma tens\u00e3o transit\u00f3ria no circuito, o SPD passa para um estado de condu\u00e7\u00e3o (ou baixa imped\u00e2ncia) e desvia a energia transit\u00f3ria e a corrente de volta para sua fonte ou terra. Isso limita ou limita a amplitude da tens\u00e3o a um n\u00edvel mais seguro. Depois dotransit\u00f3rio for desviado, o SPD retornar\u00e1 automaticamente ao seu estado de alta imped\u00e2ncia.\r\n\r\n<strong>O que diferencia os dois sistemas?<\/strong>\r\n\r\nOn a basic level, the lightning protection system protects the facility and structure from direct strikes, while SPDs protect electrical equipment and systems against surges or transients.\r\n\r\nHow the two operate, and the components involved, also vary. Lightning protection system components are always in place and ready to function, while SPDs monitor internal system voltages and spring into action if a transient voltage occurs on the circuit.","protected":false},"featured_media":802,"parent":0,"menu_order":174,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-801","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"Lightning and surge protection are two elements of an effective electrical protection system.","txt":"Lightning and surge protection are two elements of an effective electrical protection system.\r\n\r\nLightning is known to be the most significant source of surges\u2014bolts have been recorded to have a million to a billion volts and between 10,000 to 200,000 amps. However, lightning only makes up a portion of all transient events in a facility.\r\n\r\nBecause transients can originate from both external sources (like lightning) and internal sources, facilities ought to have both a lightning protection system and surge protection installed.\r\n\r\n<strong>Lightning Protection System<\/strong>\r\n\r\nA lightning protection system protects a structure from a direct lightning strike.\r\n\r\nTo do this, an air terminal (or system of air terminals) is placed in the most probable position to capture the direct strike, based on the structure\u2019s architectural design and roof equipment. The rest of the system is designed to safely convey that electrical energy from the lighting strike to ground as efficiently and safely as possible.\r\n\r\nTo intercept the strike and conduct the high current energy of a lightning strike into the earth, system components include the:\r\n\r\nAir terminal, which is used to intercept the lightning strike.\r\n\r\nDown conductors, providing the most direct path possible to move the electrical energy towards the ground.\r\n\r\nGrounding system, which provides a path for the current to dissipate into the ground and out of harm\u2019s way.\r\n\r\nBonding, meant to reduce the possibility of voltage differences that are a safety risk.\r\n\r\nLightning protection standards ensure how to properly place air terminals, run cable, ground and bond in order to ensure maximum safety in this energy transfer and dissipation.\r\n\r\n<strong>Surge Protective Device (SPD)<\/strong>\r\n\r\nA surge protective device (SPD) is designed to protect electrical systems and equipment from surge and transient events by limiting transient voltages and diverting surge currents.\r\n\r\n<strong>What causes transients and surges?<\/strong>\r\n\r\nLightning is the most spectacular form of an externally generated surge, however, it is estimated that 65% of all transients are generated internally within the facility by the switching of electrical loads such as:\r\n\r\nLightnings\r\n\r\nHeating systems\r\n\r\nMotors\r\n\r\nOther Inductive loads\r\n\r\n<strong>How does a SPD work?<\/strong>\r\n\r\nThere is at least one non-linear component of the SPD, which under different conditions, transitions between a high and low impedance state. At normal operating voltages, the SPDs are in a high impedance state and do not affect the system. When a transient voltage occurs on the circuit, the SPD moves into a state of conduction (or low impedance) and diverts the transient energy and current back to its source or ground. This limits or clamps the voltage amplitude to a safer level. After the transient is diverted, the SPD automatically resets back to its high impedance state.\r\n\r\n<strong>What Sets the Two Systems Apart?<\/strong>\r\n\r\nOn a basic level, the lightning protection system protects the facility and structure from direct strikes, while SPDs protect electrical equipment and systems against surges or transients.\r\n\r\nHow the two operate, and the components involved, also vary. Lightning protection system components are always in place and ready to function, while SPDs monitor internal system voltages and spring into action if a transient voltage occurs on the circuit."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog\/801","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\/802"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/media?parent=801"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog_category?post=801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}