{"id":33387,"date":"2019-10-31T21:52:18","date_gmt":"2019-10-31T18:52:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu\/"},"modified":"2019-10-31T21:52:18","modified_gmt":"2019-10-31T18:52:18","slug":"sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu","title":{"rendered":"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/07bfb9a07736ce2f9f9d17ef429b1d67.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNa compreens\u00e3o cl\u00e1ssica, a prote\u00e7\u00e3o contra arcos na R\u00fassia \u00e9 uma prote\u00e7\u00e3o r\u00e1pida contra curtos-circuitos, baseada na detec\u00e7\u00e3o do espectro de luz de um arco el\u00e9trico aberto em instala\u00e7\u00f5es el\u00e9tricas, sendo o m\u00e9todo mais comum de detec\u00e7\u00e3o atrav\u00e9s de sensores de fibra \u00f3tica. Este m\u00e9todo \u00e9 aplicado principalmente no setor industrial, mas com o surgimento de novos produtos na \u00e1rea de prote\u00e7\u00e3o contra arcos no setor residencial, como os AFDD modulares que operam com sinal de corrente, permitindo a instala\u00e7\u00e3o de prote\u00e7\u00e3o contra arcos em linhas de sa\u00edda, incluindo caixas de distribui\u00e7\u00e3o, cabos, conex\u00f5es, tomadas, etc., o interesse pelo tema tem aumentado.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/f35ab8d139903844857910e809d4c981.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNo entanto, os fabricantes n\u00e3o costumam compartilhar informa\u00e7\u00f5es detalhadas sobre a estrutura dos produtos modulares (se algu\u00e9m tiver esse tipo de informa\u00e7\u00e3o, ficaria feliz em receber links sobre fontes dessa informa\u00e7\u00e3o). O mesmo n\u00e3o ocorre com os sistemas de prote\u00e7\u00e3o contra arcos para o setor industrial, que possuem um manual do usu\u00e1rio detalhad\u00edssimo com 122 p\u00e1ginas, onde o princ\u00edpio de funcionamento \u00e9 exposto minuciosamente.<\/p>\n<p>Vamos considerar como exemplo o sistema de prote\u00e7\u00e3o contra arcos VAMP 321 da Schneider Electric, que inclui todas as fun\u00e7\u00f5es de prote\u00e7\u00e3o contra arcos, como sobrecarga de corrente e controle da presen\u00e7a de arcos.<\/p>\n<p><img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/1f41efdf7c3b6db7c38b4901a2954927.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Funcionalidade<\/h3>\n<p><\/p>\n<ul>\n<li>Monitoramento de corrente em tr\u00eas fases.<\/li>\n<li>Corrente de sequ\u00eancia zero.<\/li>\n<li>Registros de eventos, grava\u00e7\u00e3o de modos de emerg\u00eancia.<\/li>\n<li>Acionamento simult\u00e2neo por corrente e luz, ou apenas por luz, ou apenas por corrente.<\/li>\n<li>O tempo de acionamento da sa\u00edda com rel\u00e9 mec\u00e2nico \u00e9 inferior a 7 ms; com a op\u00e7\u00e3o da placa IGBT, o tempo de acionamento \u00e9 reduzido a 1 ms.<\/li>\n<li>Zonas de acionamento configur\u00e1veis.<\/li>\n<li>Sistema cont\u00ednuo de autoprote\u00e7\u00e3o.<\/li>\n<li>O dispositivo pode ser utilizado em v\u00e1rios sistemas de prote\u00e7\u00e3o contra arcos em redes de distribui\u00e7\u00e3o de baixa e m\u00e9dia tens\u00e3o.<\/li>\n<li>O sistema de detec\u00e7\u00e3o de arcos e prote\u00e7\u00e3o contra arcos mede a corrente de curto-circuito e sinaliza atrav\u00e9s dos canais do sensor de arco e, em caso de curto-circuito, minimiza o tempo de queima desligando rapidamente a corrente que alimenta o arco.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Princ\u00edpio de correla\u00e7\u00e3o de matrizes<\/h3>\n<p>\nAo definir as condi\u00e7\u00f5es de ativa\u00e7\u00e3o de um determinado n\u00edvel de prote\u00e7\u00e3o contra arcos, aplica-se a soma l\u00f3gica \u00e0s sa\u00eddas das matrizes de luz e corrente.<\/p>\n<p>Se a etapa de prote\u00e7\u00e3o for selecionada apenas em uma matriz, ela funcionar\u00e1 com base em condi\u00e7\u00f5es de corrente ou luminosidade, permitindo que o sistema seja configurado para operar apenas com o sinal de corrente.<\/p>\n<h3>Sinais dispon\u00edveis para monitoramento ao programar etapas de prote\u00e7\u00e3o:<\/h3>\n<p><\/p>\n<ul>\n<li>Correntes nas fases.<\/li>\n<li>Corrente de sequ\u00eancia zero.<\/li>\n<li>Tens\u00f5es lineares.<\/li>\n<li>Tens\u00f5es de fase.<\/li>\n<li>Tens\u00e3o da sequ\u00eancia zero.<\/li>\n<li>Frequ\u00eancia.<\/li>\n<li>Soma das correntes de fase.<\/li>\n<li>Corrente da sequ\u00eancia direta.<\/li>\n<li>Corrente da sequ\u00eancia inversa.<\/li>\n<li>Valor relativo da corrente da sequ\u00eancia inversa.<\/li>\n<li>Rela\u00e7\u00e3o entre as correntes das sequ\u00eancias inversa e zero.<\/li>\n<li>Tens\u00e3o da sequ\u00eancia direta.<\/li>\n<li>Tens\u00e3o da sequ\u00eancia inversa.<\/li>\n<li>Valor relativo da tens\u00e3o da sequ\u00eancia inversa.<\/li>\n<li>Valor m\u00e9dio da corrente nas fases (IL1 + IL2 + IL3) \/ 3.<\/li>\n<li>Valor m\u00e9dio da tens\u00e3o UL1, UL2, UL3.<\/li>\n<li>Valor m\u00e9dio da tens\u00e3o U12, U23, U32.<\/li>\n<li>Fator de distor\u00e7\u00e3o n\u00e3o linear IL1.<\/li>\n<li>Fator de distor\u00e7\u00e3o n\u00e3o linear IL2.<\/li>\n<li>Fator de distor\u00e7\u00e3o n\u00e3o linear IL3.<\/li>\n<li>Fator de distor\u00e7\u00e3o n\u00e3o linear Ua.<\/li>\n<li>Valor quadr\u00e1tico m\u00e9dio IL1.<\/li>\n<li>Valor quadr\u00e1tico m\u00e9dio IL2.<\/li>\n<li>Valor quadr\u00e1tico m\u00e9dio IL3.<\/li>\n<li>Valor m\u00ednimo IL1, IL2, IL3.<\/li>\n<li>Valor m\u00e1ximo IL1, IL2, IL3.<\/li>\n<li>Valor m\u00ednimo U12, U23, U32.<\/li>\n<li>Valor m\u00e1ximo U12, U23, U32.<\/li>\n<li>Valor m\u00ednimo UL1, UL2, UL3.<\/li>\n<li>Valor m\u00e1ximo UL1, UL2, UL3.<\/li>\n<li>Valor de refer\u00eancia Uo.<\/li>\n<li>Valor quadr\u00e1tico m\u00e9dio I\u043e.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Registro de modos de falha<\/h3>\n<p>\nO registro de modos de falha pode ser usado para armazenar todos os sinais de medi\u00e7\u00e3o (correntes, tens\u00f5es, informa\u00e7\u00f5es sobre estados de entradas e sa\u00eddas digitais). As entradas digitais tamb\u00e9m incluem sinais de prote\u00e7\u00e3o contra arco.<\/p>\n<h3>Iniciar grava\u00e7\u00e3o<\/h3>\n<p>\nA grava\u00e7\u00e3o pode ser iniciada acionando ou disparando qualquer etapa de prote\u00e7\u00e3o ou qualquer entrada digital. O sinal de in\u00edcio \u00e9 selecionado na matriz de sinais de sa\u00edda (sinal vertical DR). A grava\u00e7\u00e3o tamb\u00e9m pode ser iniciada manualmente.<\/p>\n<h3>Autoteste<\/h3>\n<p>\nA mem\u00f3ria n\u00e3o vol\u00e1til do dispositivo \u00e9 implementada usando um capacitor de alta capacidade e mem\u00f3ria de baixo consumo.<\/p>\n<p>Quando a fonte de alimenta\u00e7\u00e3o adicional est\u00e1 ligada, o condensador e a mem\u00f3ria RAM s\u00e3o alimentados pela fonte interna. Quando a fonte de alimenta\u00e7\u00e3o est\u00e1 desligada, a mem\u00f3ria RAM come\u00e7a a ser alimentada pelo condensador. Ela manter\u00e1 as informa\u00e7\u00f5es enquanto o condensador puder suportar a tens\u00e3o permitida. Para um ambiente com temperatura de +25\u00b0C, o tempo de opera\u00e7\u00e3o ser\u00e1 de 7 dias (umidade alta reduz esse par\u00e2metro).<\/p>\n<p>A mem\u00f3ria RAM n\u00e3o vol\u00e1til serve para armazenar registros sobre modos de emerg\u00eancia e o registro de eventos.<\/p>\n<p>As fun\u00e7\u00f5es do microcontrolador e a integridade dos fios relacionados, junto com a integridade do software, s\u00e3o controladas por uma rede de autoconhecimento separado. Al\u00e9m do controle, esta rede tenta reiniciar o microcontrolador em caso de falha. Se a reinicializa\u00e7\u00e3o falhar, o dispositivo de autoconhecimento emite um sinal para iniciar a indica\u00e7\u00e3o de um dano interno permanente.<\/p>\n<p>Caso o dispositivo de autoconhecimento detecte danos permanentes, ele bloqueia outros rel\u00e9s de sa\u00edda (exceto o rel\u00e9 de sa\u00edda da fun\u00e7\u00e3o de autoconhecimento e rel\u00e9s de sa\u00edda utilizados pela prote\u00e7\u00e3o contra arco el\u00e9trico).<\/p>\n<p>A fonte de alimenta\u00e7\u00e3o interna tamb\u00e9m \u00e9 monitorada. Em caso de falta de alimenta\u00e7\u00e3o adicional, um sinal de alarme \u00e9 enviado automaticamente. Isso significa que o rel\u00e9 de sa\u00edda de dano interno est\u00e1 energizado se a fonte de alimenta\u00e7\u00e3o adicional estiver ligada e nenhum dano interno for detectado.<\/p>\n<p>\u00c9 feito o controle da unidade central, dos dispositivos de entrada\/sa\u00edda e dos sensores.<\/p>\n<h3>Medi\u00e7\u00f5es utilizadas pela fun\u00e7\u00e3o de prote\u00e7\u00e3o contra arco el\u00e9trico.<\/h3>\n<p>\nAs medi\u00e7\u00f5es de corrente nas tr\u00eas fases e a corrente de falha para a prote\u00e7\u00e3o contra arco el\u00e9trico s\u00e3o realizadas pela eletr\u00f4nica. A eletr\u00f4nica compara os n\u00edveis de corrente com os valores dos limites de acionamento e emite sinais bin\u00e1rios 'I&gt;&gt;' ou 'Io&gt;&gt;' para a fun\u00e7\u00e3o de prote\u00e7\u00e3o contra arco el\u00e9trico em caso de ultrapassagem do limite. Todos os componentes das correntes s\u00e3o considerados.<\/p>\n<p>Os sinais 'I&gt;&gt;' e 'Io&gt;&gt;' est\u00e3o relacionados ao chip FPGA, que executa a fun\u00e7\u00e3o de prote\u00e7\u00e3o contra arco el\u00e9trico. A precis\u00e3o da medi\u00e7\u00e3o para prote\u00e7\u00e3o contra arco el\u00e9trico \u00e9 de \u00b1 15% a 50Hz.<\/p>\n<p><img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/c1f12088f2d6f4f00acaadac09a254cb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Harm\u00f4nicos e total de n\u00e3o sinusoidalidade (THD)<\/h3>\n<p>\nO dispositivo calcula o THD como uma porcentagem das correntes e tens\u00f5es na frequ\u00eancia fundamental.<\/p>\n<p>Harm\u00f4nicos da 2\u00aa \u00e0 15\u00aa s\u00e3o considerados para correntes e tens\u00f5es de fase. (O 17\u00ba harm\u00f4nico ser\u00e1 parcialmente considerado no valor do 15\u00ba harm\u00f4nico. Isso ocorre devido aos princ\u00edpios de medi\u00e7\u00e3o digital.)<\/p>\n<h3>Modos de medi\u00e7\u00e3o de tens\u00e3o<\/h3>\n<p>\nDependendo do tipo de aplica\u00e7\u00e3o e dos transformadores de corrente dispon\u00edveis, o dispositivo pode ser conectado a uma tens\u00e3o de sequ\u00eancia zero, tens\u00e3o linear ou tens\u00e3o de fase. O par\u00e2metro configur\u00e1vel \u201cModo de medi\u00e7\u00e3o de tens\u00e3o\u201d deve ser definido de acordo com a conex\u00e3o utilizada.<\/p>\n<h3>Modos dispon\u00edveis:<\/h3>\n<p><\/p>\n<h3>\u201cU0\u201d<\/h3>\n<p>\nO dispositivo est\u00e1 conectado \u00e0 tens\u00e3o de sequ\u00eancia zero. Prote\u00e7\u00e3o direcional contra falhas \u00e0 terra est\u00e1 dispon\u00edvel. Medi\u00e7\u00e3o de tens\u00e3o linear, medi\u00e7\u00e3o de energia e prote\u00e7\u00f5es por aumento e diminui\u00e7\u00e3o de tens\u00e3o n\u00e3o est\u00e3o dispon\u00edveis.<\/p>\n<p><img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/d28c23a5da99f011260962f9d5f22124.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>\u201c1LL\u201d<\/h3>\n<p>\nO dispositivo est\u00e1 conectado \u00e0 tens\u00e3o linear. Medi\u00e7\u00e3o de tens\u00e3o em uma fase e prote\u00e7\u00f5es por diminui\u00e7\u00e3o e aumento de tens\u00e3o est\u00e3o dispon\u00edveis. Prote\u00e7\u00e3o direcional contra falhas \u00e0 terra n\u00e3o est\u00e1 dispon\u00edvel.<\/p>\n<p><img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/ef85c9390c7ffe9b21367cceca125f0c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>\u201c1LN\u201d<\/h3>\n<p>\nO dispositivo est\u00e1 conectado a uma tens\u00e3o de fase. Medi\u00e7\u00e3o de tens\u00e3o em uma fase est\u00e1 dispon\u00edvel. Em redes com neutro aterrado e compensado, prote\u00e7\u00e3o por diminui\u00e7\u00e3o e aumento de tens\u00e3o est\u00e1 dispon\u00edvel. Prote\u00e7\u00e3o direcional contra falhas \u00e0 terra n\u00e3o est\u00e1 dispon\u00edvel.<\/p>\n<p><img decoding=\"async\" alt=\"Sistema de prote\u00e7\u00e3o por arco com acionamento por sinal de corrente\" src=\"\/wp-content\/uploads\/2019\/05\/5cb78a2fa82bd50a825f13fad995e134.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Componentes sim\u00e9tricos<\/h3>\n<p>\nEm um sistema trif\u00e1sico, tens\u00f5es e correntes podem ser decompostas em componentes sim\u00e9tricos, conforme Fortescue.<\/p>\n<h3>Os componentes sim\u00e9tricos s\u00e3o:<\/h3>\n<p><\/p>\n<ul>\n<li>Sequ\u00eancia direta.<\/li>\n<li>Sequ\u00eancia inversa.<\/li>\n<li>Sequ\u00eancia zero.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Objetos controlados<\/h3>\n<p>\nEste dispositivo permite monitorar at\u00e9 seis objetos, como interruptores, seccionadores ou l\u00e2minas de aterramento. O controle pode ser realizado com base no princ\u00edpio de \u201cselecionar-agir\u201d ou \u201ccontrole direto\u201d.<\/p>\n<h3>Fun\u00e7\u00f5es l\u00f3gicas<\/h3>\n<p>\nO dispositivo suporta l\u00f3gica program\u00e1vel do usu\u00e1rio para express\u00f5es l\u00f3gicas de sinais.<\/p>\n<h3>As fun\u00e7\u00f5es dispon\u00edveis s\u00e3o:<\/h3>\n<p><\/p>\n<ul>\n<li>E.<\/li>\n<li>OU.<\/li>\n<li>OU exclusivo.<\/li>\n<li>N\u00c3O.<\/li>\n<li>CONTADORES.<\/li>\n<li>Flip-flops RS &amp; D.<\/li>\n<\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/451212\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u043f\u043e\u043d\u0438\u043c\u0430\u043d\u0438\u0438 \u0434\u0443\u0433\u043e\u0432\u0430\u044f \u0437\u0430\u0449\u0438\u0442\u0430 \u0432 \u0420\u043e\u0441\u0441\u0438\u0438 \u2013 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