{"id":77380,"date":"2026-07-08T11:45:17","date_gmt":"2026-07-08T09:45:17","guid":{"rendered":"https:\/\/circutor.com\/?p=77380"},"modified":"2026-07-13T13:48:41","modified_gmt":"2026-07-13T11:48:41","slug":"quando-instalar-protecao-diferencial-tipo-b","status":"publish","type":"post","link":"https:\/\/circutor.com\/pt-pt\/artigos\/quando-instalar-protecao-diferencial-tipo-b\/","title":{"rendered":"Quando instalar prote\u00e7\u00e3o diferencial tipo B"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=”.vc_custom_1783942298986{margin-top: 20px !important;margin-bottom: 20px !important;}”]<\/p>\n

A incorpora\u00e7\u00e3o de sistemas de controlo eletr\u00f3nico veio otimizar a gest\u00e3o energ\u00e9tica e a automatiza\u00e7\u00e3o dos processos produtivos. Estas tecnologias, baseadas na convers\u00e3o de corrente alternada em corrente cont\u00ednua, requerem uma prote\u00e7\u00e3o adequada que garanta a seguran\u00e7a das pessoas e das instala\u00e7\u00f5es perante eventuais falhas em ambas as partes do sistema.<\/h4>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”10″ equal_height=”yes”][vc_column width=”1\/2″][vc_column_text css=”.vc_custom_1783942324278{margin-top: 20px !important;margin-bottom: 20px !important;}”]Isto afeta equipamentos comuns, como variadores de velocidade, inversores, sistemas de alimenta\u00e7\u00e3o ininterrupta (UPS), pontos de carregamento de ve\u00edculos el\u00e9tricos, equipamentos inform\u00e1ticos ou sistemas LED<\/strong>, presentes tanto em aplica\u00e7\u00f5es industriais como na utiliza\u00e7\u00e3o quotidiana.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_column_text css=”.vc_custom_1783942359090{margin-top: 20px !important;margin-bottom: 20px !important;}”]No que diz respeito \u00e0 prote\u00e7\u00e3o das pessoas e da pr\u00f3pria instala\u00e7\u00e3o<\/strong> contra eventuais falhas ou correntes de fuga em corrente cont\u00ednua, os dispositivos de prote\u00e7\u00e3o diferencial dos tipos A, CA ou F<\/strong> n\u00e3o detetam fugas de corrente cont\u00ednua. Esta limita\u00e7\u00e3o pode comprometer a continuidade do servi\u00e7o, provocar inc\u00eandios ou at\u00e9 colocar em risco a vida das pessoas.[\/vc_column_text][\/vc_column][\/vc_row][vc_row full_width=”stretch_row” css=”.vc_custom_1783082102930{background: #92CDE0 url(https:\/\/circutor.com\/wp-content\/uploads\/2026\/07\/art-protect-B-fons-blau.jpg?id=76819) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}”][vc_column][vc_column_text css=”.vc_custom_1783942378488{margin-top: 20px !important;margin-bottom: 20px !important;padding-top: 20px !important;padding-bottom: 20px !important;}”]<\/p>\n

Por este motivo, \u00e9 fundamental utilizar prote\u00e7\u00e3o diferencial do tipo B em instala\u00e7\u00f5es onde possam ocorrer fugas de corrente alternada, corrente pulsante, alta frequ\u00eancia ou corrente cont\u00ednua.<\/span><\/em><\/h4>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_1783070047350{margin-top: 20px !important;}”][vc_column][vc_column_text css=”.vc_custom_1783942426085{margin-top: 20px !important;margin-bottom: 20px !important;}”]<\/p>\n

Que crit\u00e9rios utilizar na instala\u00e7\u00e3o de diferenciais em s\u00e9rie<\/h2>\n

Quando se instalam diferenciais em s\u00e9rie, a montante da carga, a sele\u00e7\u00e3o correta do dispositivo n\u00e3o deve considerar apenas o tipo de carga. \u00c9 igualmente necess\u00e1rio ter em conta outros aspetos que assegurem uma coordena\u00e7\u00e3o adequada do sistema de prote\u00e7\u00e3o.<\/p>\n

Para garantir a seletividade vertical<\/strong>, devem ser sempre cumpridas tr\u00eas condi\u00e7\u00f5es: amperim\u00e9trica, cronom\u00e9trica e de tipo<\/strong>.[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=”10″ equal_height=”yes”][vc_column width=”1\/3″ css=”.vc_custom_1783332114232{background-color: #FFEAEA !important;border-radius: 15px !important;}”][vc_column_text css=”.vc_custom_1783942492834{margin-bottom: 20px !important;padding-top: 20px !important;padding-right: 20px !important;padding-bottom: 20px !important;padding-left: 20px !important;}”]\"Selectividad<\/p>\n

Seletividade amperim\u00e9trica<\/h3>\n

A sensibilidade de um interruptor diferencial<\/strong> deve ser sempre superior \u00e0 do dispositivo instalado a jusante. Desta forma, caso ocorra uma fuga, atuar\u00e1 primeiro o dispositivo mais pr\u00f3ximo do ponto afetado da instala\u00e7\u00e3o, evitando a desconex\u00e3o de toda a linha.<\/p>\n

Para garantir esta seletividade, recomenda-se ajustar a sensibilidade<\/strong> para um valor aproximadamente tr\u00eas vezes superior<\/strong> ao do diferencial instalado a jusante.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″ css=”.vc_custom_1783332148572{background-color: #FFEAEA !important;border-radius: 15px !important;}”][vc_column_text css=”.vc_custom_1783942552322{margin-bottom: 20px !important;padding-top: 20px !important;padding-right: 20px !important;padding-bottom: 20px !important;padding-left: 20px !important;}”]\"Selectividad<\/p>\n

Seletividade cronom\u00e9trica<\/h3>\n

Tal como acontece com a sensibilidade, os tempos de disparo<\/strong> dos interruptores diferenciais tamb\u00e9m devem ser superiores<\/strong> no dispositivo instalado a montante.<\/p>\n

Isto garante que, perante uma fuga, atua primeiro o diferencial mais pr\u00f3ximo do ponto de falha. Para manter a seletividade cronom\u00e9trica<\/strong>, recomenda-se configurar o tempo de atraso para um valor aproximadamente duas vezes superior<\/strong> ao definido no diferencial instalado a jusante.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″ css=”.vc_custom_1783332159043{background-color: #FFEAEA !important;border-radius: 15px !important;}”][vc_column_text css=”.vc_custom_1783942613905{margin-bottom: 20px !important;padding-top: 20px !important;padding-right: 20px !important;padding-bottom: 20px !important;padding-left: 20px !important;}”]\"Selectividad<\/p>\n

Seletividade pelo tipo de prote\u00e7\u00e3o diferencial<\/h3>\n

Outro aspeto importante \u00e9 a sele\u00e7\u00e3o correta do tipo de prote\u00e7\u00e3o diferencial<\/strong>. Este deve ser sempre do mesmo tipo ou de um tipo superior ao instalado a jusante.<\/p>\n

Desta forma, assegura-se a continuidade do servi\u00e7o e evitam-se disparos intempestivos que possam afetar toda a instala\u00e7\u00e3o.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”76753″ img_size=”large” alignment=”center” css=”.vc_custom_1783330363629{margin-top: 40px !important;margin-bottom: 40px !important;padding-right: 40px !important;padding-left: 40px !important;}”][\/vc_column][\/vc_row][vc_row css=”.vc_custom_1783068982335{padding-top: 20px !important;padding-right: 20px !important;padding-bottom: 20px !important;padding-left: 20px !important;background-color: #F3F4F5 !important;border-radius: 15px !important;}”][vc_column][vc_column_text css=”.vc_custom_1783942654994{margin-top: 20px !important;margin-bottom: 40px !important;}”]\"Soluciones<\/p>\n

Solu\u00e7\u00f5es Circutor de prote\u00e7\u00e3o diferencial tipo B<\/h2>\n

Face \u00e0 crescente necessidade de proteger este tipo de cargas, a Circutor<\/strong> disp\u00f5e de uma vasta gama de solu\u00e7\u00f5es de prote\u00e7\u00e3o diferencial tipo B<\/strong>.[\/vc_column_text][vc_row_inner content_placement=”middle” css=”.vc_custom_1783330479125{margin-top: 20px !important;border-top-width: 3px !important;border-top-color: #FFFFFF !important;border-top-style: solid !important;}”][vc_column_inner][vc_column_text css=”.vc_custom_1783942797598{margin-top: 20px !important;margin-bottom: 20px !important;}”]<\/p>\n

RGU-100B<\/h3>\n

O RGU-100B<\/strong><\/a> \u00e9 um rel\u00e9 diferencial associado a transformadores da gama WGB<\/strong><\/a> e equipado com comunica\u00e7\u00f5es RS-485 atrav\u00e9s de Modbus RTU, com di\u00e2metros interiores at\u00e9 140 mm, permitindo proteger cargas at\u00e9 630 A.<\/p>\n

\"RGU-100B\"\"WGB\"<\/p>\n

O equipamento \u00e9 configur\u00e1vel com sensibilidades a partir de 30 mA e disp\u00f5e de disparo instant\u00e2neo ou temporizado. Al\u00e9m disso, apresenta no visor o n\u00edvel de fuga no momento do disparo, facilitando o ajuste preciso da sensibilidade de acordo com as necessidades da instala\u00e7\u00e3o.<\/p>\n

Adicionalmente, regista o n\u00edvel de fuga em CA, em CC ou o total combinado CA+CC, permitindo identificar facilmente a origem da anomalia.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=”middle” css=”.vc_custom_1783330489293{margin-top: 20px !important;border-top-width: 3px !important;border-top-color: #FFFFFF !important;border-top-style: solid !important;}”][vc_column_inner][vc_column_text css=”.vc_custom_1783943046230{margin-top: 20px !important;margin-bottom: 20px !important;}”]<\/p>\n

RGU-110B<\/h3>\n

O RGU-110B<\/strong><\/a> \u00e9 um rel\u00e9 eletr\u00f3nico de prote\u00e7\u00e3o diferencial tipo B concebido para detetar e gerir correntes de fuga em instala\u00e7\u00f5es el\u00e9tricas modernas.<\/p>\n

\"RGU-110B\"\"WB\"<\/p>\n

Em conjunto com os transformadores WB<\/strong><\/a>, protege e monitoriza todas as instala\u00e7\u00f5es el\u00e9tricas onde, devido ao tipo de carga, \u00e0 legisla\u00e7\u00e3o em vigor ou \u00e0s especifica\u00e7\u00f5es do fabricante, seja necess\u00e1ria a instala\u00e7\u00e3o de prote\u00e7\u00e3o diferencial tipo B.<\/p>\n

A s\u00e9rie RGU-110B<\/strong><\/a> disp\u00f5e de transformadores para proteger cargas at\u00e9 4000 A, permitindo uma correta coordena\u00e7\u00e3o do tipo de prote\u00e7\u00e3o em quadros parciais ou quadros gerais, bem como a prote\u00e7\u00e3o de grandes cargas, como variadores de velocidade.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=”middle” css=”.vc_custom_1783330501285{margin-top: 20px !important;border-top-width: 3px !important;border-top-color: #FFFFFF !important;border-top-style: solid !important;}”][vc_column_inner][vc_column_text css=”.vc_custom_1783943202982{margin-top: 20px !important;margin-bottom: 20px !important;}”]<\/p>\n

CBS-400B<\/h3>\n

O CBS-400B<\/strong><\/a> \u00e9 um rel\u00e9 diferencial associado a transformadores da gama WGB<\/strong><\/a> e equipado com comunica\u00e7\u00f5es RS-485 atrav\u00e9s de Modbus RTU, com di\u00e2metros interiores at\u00e9 140 mm, permitindo proteger cargas at\u00e9 630 A.<\/p>\n

\"CBS-400B\"\"WGB\"<\/p>\n

O equipamento \u00e9 configur\u00e1vel com sensibilidades a partir de 30 mA e disp\u00f5e de quatro canais para proteger quatro circuitos totalmente independentes em apenas tr\u00eas m\u00f3dulos DIN. Disp\u00f5e igualmente de disparo instant\u00e2neo ou temporizado.<\/p>\n

Tal como o RGU-100B<\/strong><\/a>, permite visualizar no visor o n\u00edvel de fuga em CA, em CC ou o total combinado CA+CC.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row css=”.vc_custom_1782997223423{margin-top: 40px !important;margin-bottom: 40px !important;}”][vc_column][vc_column_text css=””]\"Revisa<\/p>\n

Consulte sempre os manuais dos equipamentos<\/h2>\n

Recomenda-se a consulta adequada dos manuais de equipamentos como variadores trif\u00e1sicos, inversores, pontos de carregamento ou sistemas de alimenta\u00e7\u00e3o ininterrupta.<\/p>\n

Os fabricantes deste tipo de equipamentos com convers\u00e3o CA\/CC especificam que a \u00fanica forma de garantir uma prote\u00e7\u00e3o adequada consiste na utiliza\u00e7\u00e3o de diferenciais tipo B<\/strong><\/a>.<\/p>\n

Desta forma, garante-se o correto funcionamento do sistema, previnem-se poss\u00edveis acidentes e assegura-se a continuidade do fornecimento de energia el\u00e9trica.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column][vc_column_text css=”.vc_custom_1783942298986{margin-top: 20px !important;margin-bottom: 20px !important;}”] A incorpora\u00e7\u00e3o de sistemas de controlo eletr\u00f3nico veio otimizar a gest\u00e3o energ\u00e9tica e a automatiza\u00e7\u00e3o dos processos produtivos. Estas tecnologias, baseadas na convers\u00e3o de corrente alternada em corrente cont\u00ednua, requerem uma prote\u00e7\u00e3o adequada que garanta a seguran\u00e7a das pessoas e das instala\u00e7\u00f5es perante eventuais falhas em ambas as partes […]<\/p>\n","protected":false},"author":7,"featured_media":76769,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[3525],"tags":[3827,3649,3609],"class_list":["post-77380","post","type-post","status-publish","format-standard","hentry","category-artigos","tag-eficiencia-energetica-pt-pt","tag-protecao-eletrica","tag-qualidade-de-rede"],"acf":[],"yoast_head":"\nQuando instalar prote\u00e7\u00e3o diferencial tipo B - CIRCUTOR<\/title>\n<meta name=\"description\" content=\"Quando instalar prote\u00e7\u00e3o diferencial tipo B\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/circutor.com\/pt-pt\/artigos\/quando-instalar-protecao-diferencial-tipo-b\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quando instalar prote\u00e7\u00e3o diferencial tipo B - 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