{"id":852,"date":"2023-12-18T15:19:48","date_gmt":"2023-12-18T07:19:48","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&p=852"},"modified":"2025-05-22T15:55:13","modified_gmt":"2025-05-22T07:55:13","slug":"surge-protection-devices-for-industrial-applications","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/pt\/blog\/surge-protection-devices-for-industrial-applications\/","title":{"rendered":"Dispositivos de prote\u00e7\u00e3o contra surtos para aplica\u00e7\u00f5es industriais"},"content":{"rendered":"

1. Introdu\u00e7\u00e3o<\/strong><\/h2>\r\n

Em ambientes industriais, uma fonte de alimenta\u00e7\u00e3o est\u00e1vel n\u00e3o \u00e9 um luxo \u2013 \u00e9 uma necessidade. F\u00e1bricas, f\u00e1bricas e instala\u00e7\u00f5es de processamento modernas dependem de sistemas automatizados, PLCs, drives de frequ\u00eancia vari\u00e1vel e componentes eletr\u00f4nicos sens\u00edveis para operar 24 horas por dia, 7 dias por semana. Mas com esse avan\u00e7o vem a vulnerabilidade.<\/p>\r\n

Os equipamentos atuais s\u00e3o mais conectados, mais compactos e mais delicados. Mesmo uma pequena tens\u00e3o transit\u00f3ria ou surto el\u00e9trico pode causar grandes interrup\u00e7\u00f5es. Esses eventos de sobretens\u00e3o, muitas vezes causados \u200b\u200bpor raios ou comuta\u00e7\u00e3o interna, podem danificar componentes, retardar opera\u00e7\u00f5es e colocar em risco a seguran\u00e7a.<\/p>\r\n

\u00c9 por isso que os dispositivos de prote\u00e7\u00e3o contra surtos n\u00e3o s\u00e3o mais opcionais. Eles s\u00e3o uma parte cr\u00edtica da seguran\u00e7a el\u00e9trica e da qualidade da energia em ambientes industriais.<\/p>\r\n\r\n

2. Por que Dispositivo de prote\u00e7\u00e3o contra surtos<\/a> \u00e9 essencial na ind\u00fastria<\/strong><\/h2>\r\n\"Dispositivo<\/a>\r\n

Protegendo Sistemas de Automa\u00e7\u00e3o e Controle<\/h3>\r\n

A automa\u00e7\u00e3o industrial funciona em pain\u00e9is de controle, m\u00f3dulos de E\/S e sensores inteligentes \u2013 todos sens\u00edveis a picos de tens\u00e3o. Os dispositivos de prote\u00e7\u00e3o contra surtos protegem esses sistemas contra eventos transit\u00f3rios perigosos que podem se originar tanto de fontes externas (como raios) quanto de eventos internos (como comuta\u00e7\u00e3o de motores ou cargas capacitivas). Com a instala\u00e7\u00e3o adequada do SPD, sua l\u00f3gica de controle permanece intacta e on-line.<\/p>\r\n\r\n

Preven\u00e7\u00e3o de danos ao equipamento e tempo de inatividade<\/h3>\r\n

Um surto pode destruir uma fonte de alimenta\u00e7\u00e3o, superaquecer placas de circuito ou destruir linhas de comunica\u00e7\u00e3o. O custo? Produ\u00e7\u00e3o perdida, produ\u00e7\u00e3o interrompida e reparos urgentes. Os dispositivos de prote\u00e7\u00e3o contra surtos atuam como a primeira linha de defesa, desviando o excesso de tens\u00e3o com seguran\u00e7a para o terra e mantendo os sistemas cr\u00edticos funcionando sem interrup\u00e7\u00e3o.<\/p>\r\n\r\n

Garantindo a seguran\u00e7a do pessoal<\/h3>\r\n

Os surtos el\u00e9tricos n\u00e3o s\u00e3o apenas prejudiciais para as m\u00e1quinas \u2013 eles s\u00e3o perigosos para as pessoas. Falhas de arco el\u00e9trico, inc\u00eandios em equipamentos e condutores expostos podem criar riscos \u00e0 seguran\u00e7a dos trabalhadores. A instala\u00e7\u00e3o de dispositivos de prote\u00e7\u00e3o contra surtos reduz a chance de arcos el\u00e9tricos e explos\u00f5es de equipamentos, proporcionando um ambiente de trabalho mais seguro.<\/p>\r\n\r\n

Estendendo a vida \u00fatil do equipamento e reduzindo custos de manuten\u00e7\u00e3o<\/h3>\r\n

Os surtos degradam lentamente os componentes eletr\u00f4nicos ao longo do tempo, mesmo que o impacto n\u00e3o seja imediatamente vis\u00edvel. Com dispositivos de prote\u00e7\u00e3o contra surtos instalados, os sistemas enfrentam menos falhas relacionadas \u00e0 tens\u00e3o, o que significa menos reparos n\u00e3o programados, menos fadiga do equipamento e uma vida \u00fatil mais longa para seus ativos.<\/p>\r\n\r\n

\r\n

Manter a tens\u00e3o sob controle ajuda a manter os custos sob controle.<\/p>\r\n<\/blockquote>\r\n

Atendendo aos padr\u00f5es de seguran\u00e7a e requisitos regulamentares<\/h3>\r\n

Os dispositivos de prote\u00e7\u00e3o contra surtos ajudam as instala\u00e7\u00f5es a atender aos padr\u00f5es de seguran\u00e7a industrial, como CEI 61643<\/strong>, UL 1449<\/strong>, e NFPA 70 (NEC)<\/strong>. A conformidade n\u00e3o se trata apenas de passar em inspe\u00e7\u00f5es \u2013 trata-se de reduzir a responsabilidade e garantir a resili\u00eancia em ambientes de alto risco.<\/p>\r\n\r\n

3. No\u00e7\u00f5es b\u00e1sicas de prote\u00e7\u00e3o contra surtos<\/strong><\/h2>\r\nUm dispositivo de prote\u00e7\u00e3o contra surtos (SPD), anteriormente conhecido como supressor de surtos de tens\u00e3o transit\u00f3ria (TVSS), \u00e9 projetado para absorver e desviar surtos de alta corrente para o aterramento e desviar seu equipamento. A espinha dorsal de cada SPD \u00e9 o varistor de \u00f3xido met\u00e1lico (ou MOV). O MOV \u00e9 um dispositivo de estado s\u00f3lido que normalmente possui imped\u00e2ncia muito alta. Quando a tens\u00e3o aplicada excede repentinamente a \u201ctens\u00e3o de ruptura\u201d, o MOV atua como uma chave de alt\u00edssima velocidade e desvia a energia para o terra.\r\n

4. Instala\u00e7\u00e3o de dispositivos de prote\u00e7\u00e3o contra surtos<\/strong><\/h2>\r\nSomente a prote\u00e7\u00e3o contra surtos adequadamente dimensionada e aterrada pode ter sucesso na preven\u00e7\u00e3o de danos ao equipamento. Para prote\u00e7\u00e3o m\u00e1xima, os SPDs devem ser instalados o mais pr\u00f3ximo poss\u00edvel do equipamento protegido e os comprimentos dos cabos devem ser t\u00e3o curtos e retos quanto poss\u00edvel para minimizar o caminho resistivo do circuito at\u00e9 o terra. Qualquer coisa abaixo de uma baixa imped\u00e2ncia de aterramento e liga\u00e7\u00e3o far\u00e1 com que a energia de surto seja desviada por toda a instala\u00e7\u00e3o, com efeitos potencialmente perigosos.\r\n

Resumo<\/strong><\/h2>\r\nEmbora os surtos n\u00e3o possam ser eliminados, eles podem ser mitigados atrav\u00e9s de uma solu\u00e7\u00e3o de prote\u00e7\u00e3o contra surtos, reduzindo assim o seu efeito prejudicial. Isso leva a maior confiabilidade e maior produtividade geral. Neste sentido, a prote\u00e7\u00e3o contra sobretens\u00f5es \u00e9 uma forma barata de seguro do sistema el\u00e9trico.","protected":false},"featured_media":853,"parent":0,"menu_order":151,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-852","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"Today\u2019s industrial and professional equipment is dependent upon microprocessors and other sensitive electronic equipment, increasing the world\u2019s need for greater protection from electrical surges.","txt":"

1. Introduction<\/strong><\/h2>\r\n

In industrial settings, a stable power supply isn\u2019t a luxury\u2014it\u2019s a necessity. Modern factories, plants, and processing facilities rely on automated systems, PLCs, variable-frequency drives, and sensitive electronics to operate 24\/7. But with that advancement comes vulnerability.<\/p>\r\n

Today\u2019s equipment is more connected, more compact, and more delicate. Even a small transient voltage or electrical surge can cause major disruptions. These overvoltage events, often caused by lightning or internal switching, can damage components, slow operations, and risk safety.<\/p>\r\n

That\u2019s why surge protection devices are no longer optional. They are a critical part of electrical safety and power quality in industrial environments.<\/p>\r\n\r\n

2. Why Surge Protection Device<\/a> is Essential in Industry<\/strong><\/h2>\r\n\"Surge<\/a>\r\n

Protecting Automation and Control Systems<\/h3>\r\n

Industrial automation runs on control panels, I\/O modules, and smart sensors \u2014 all of which are sensitive to voltage spikes. Surge protection devices shield these systems from dangerous transient events that can originate from both external sources (like lightning) and internal events (such as switching motors or capacitive loads). With proper SPD installation, your control logic stays intact and online.<\/p>\r\n\r\n

Preventing Equipment Damage and Downtime<\/h3>\r\n

One surge can wipe out a power supply, overheat circuit boards, or destroy communication lines. The cost? Lost production, halted output, and urgent repairs. Surge protection devices act as the first line of defense, diverting excess voltage safely to ground and keeping critical systems running without interruption.<\/p>\r\n\r\n

Ensuring Personnel Safety<\/h3>\r\n

Electrical surges aren\u2019t just hard on machines \u2014 they\u2019re dangerous to people. Arcing faults, equipment fires, and exposed conductors can create safety hazards for workers. Installing surge protection devices reduces the chance of arc flashes and equipment explosions, supporting a safer work environment.<\/p>\r\n\r\n

Extending Equipment Lifespan and Cutting Maintenance Costs<\/h3>\r\n

Surges slowly degrade electronic components over time, even if the impact isn\u2019t instantly visible. With surge protection devices in place, systems experience fewer voltage-related failures, meaning fewer unscheduled repairs, less equipment fatigue, and a longer useful life for your assets.<\/p>\r\n\r\n

\r\n

Keeping voltage under control helps keep costs under control.<\/p>\r\n<\/blockquote>\r\n

Meeting Safety Standards and Regulatory Requirements<\/h3>\r\n

Surge protection devices help facilities meet industrial safety standards like IEC 61643<\/strong>, UL 1449<\/strong>, and NFPA 70 (NEC)<\/strong>. Compliance isn\u2019t just about passing inspections \u2014 it\u2019s about reducing liability and ensuring resilience in high-risk environments.<\/p>\r\n\r\n

3. Surge Protection Basics<\/strong><\/h2>\r\nA surge protection device (SPD), previously known as a transient voltage surge suppressor (TVSS), is designed to absorb and divert high-current surges to ground and bypass your equipment. The backbone of every SPD is the metal oxide varistor (or MOV). The MOV is a solid-state device that normally has very high impedance. When the applied voltage suddenly exceeds the \u201cbreakdown voltage,\u201d the MOV acts as a very high-speed switch and diverts the energy to ground.\r\n

4. Installation of Surge Protection Devices<\/strong><\/h2>\r\nOnly surge protection that is properly sized and grounded can be successful in preventing equipment damage. For maximum protection, SPDs should be installed as close to the protected equipment as possible, and cable lengths should be as short and straight as possible to minimize the resistive path of the circuit to ground. Anything less than a low grounding and bonding impedance will cause surge energy to be diverted throughout the facility with potentially hazardous effects.\r\n

Summary<\/strong><\/h2>\r\nAlthough surges cannot be eliminated, they can be mitigated through a surge protection solution, thereby reducing their damaging effect. This leads to greater reliability and overall improved productivity. In this regard, surge protection is an inexpensive form of electrical system insurance."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog\/852","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\/853"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/media?parent=852"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/pt\/wp-json\/wp\/v2\/blog_category?post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}