Quando um ACB (disjuntor de ar) detecta uma falha, ele corta rapidamente o fluxo de corrente no circuito e extingue o arco elétrico usando ar de alta pressão.
Como resultado, eles também são adequados para aplicação em uma ampla gama de aplicações comerciais e residenciais.
Continue lendo para saber mais sobre como o ACB funciona em detalhes, incluindo benefícios, solução de problemas e muito mais.
O ACB possui vários componentes que contribuem para seu princípio de funcionamento, como:
Quando surge um problema, os contatos primário e de arco se separam. Essa separação é ativada pela unidade de disparo, que consiste em relés térmicos ou de sobrecorrente, quando a corrente ultrapassa o limite devido a uma sobrecarga ou curto-circuito.
No entanto, essa separação cria um arco elétrico. Portanto, as válvulas de explosão abrem, permitindo que o ar de alta pressão flua através dos contatos do arco e da calha. Isso ajuda a resfriá-lo e torna o arco elétrico menor, garantindo que o fluxo elétrico seja interrompido com segurança. Isso vídeo pode ajudar você a entender melhor e visualizar o processo do ACB.
| Tipo | Operação | Aplicativo |
| Quebra Simples ACB | O tipo mais comum, que apresentava dois contatos que se desconectavam um do outro para impedir o fluxo de corrente. Eles usam simplesmente o ar e as calhas de arco para extinguir o arco elétrico. | Comumente usado para baixa tensão (abaixo de 450v) e aplicativos que não exigem recursos avançados. |
| Sopro Magnético ACB | Possui bobinas blowout que criam um campo magnético, o que cria uma Força de Lorentz. Isso puxa rapidamente o arco elétrico para mais perto da calha do arco, onde ele é extinto de forma mais eficaz pelo ar interno. | Preferível para aplicações que envolvem alto fluxo elétrico porque fornece proteção e extinção superiores contra curtos-circuitos ou sobrecargas. |
| Extração ACB | Seu mecanismo de disparo é comparável ao Plain Break ACB. No entanto, este design torna simples removê-los do gabinete para manutenção ou substituição. | Adequado para ambientes industriais que necessitam de modificações e manutenções frequentes e necessárias. |
Eles são um dispositivo que protege sistemas elétricos contra vários erros, incluindo sobrecargas e curtos-circuitos. Além disso, eles podem lidar com grandes quantidades de eletricidade e frequentemente têm configurações de disparo ajustáveis. Isso os torna adequados para muitas aplicações industriais.
Por fim, eles são considerados mais seguros e ecológicos, pois usam ar em vez de óleo ou produtos químicos para apagar o arco elétrico.
Um dos problemas mais comuns que você pode encontrar ao usar esses dispositivos é “tropeçar em algo incômodo”. Isso pode levar ao bloqueio desnecessário do fluxo de eletricidade, o que interrompe as operações. Portanto, considere ajustar as configurações de disparo ou verificar se elas atualmente têm baixa resistência de isolamento e conexões defeituosas, fazendo com que os sensores forneçam leituras falsas quando não há sobrecorrente ou curto-circuito.
Se o dispositivo não tropeça quando houver uma falha elétrica, como uma sobrecorrente, verifique se as condições ambientais são ideais para eles, pois eles também são sensíveis a calor ou umidade extremos. Além disso, certifique-se de que todos os componentes e linhas de conexão, incluindo sensores como relés térmicos, estejam devidamente apertados, posicionados e não danificados.
Sempre que o problema persistir, consulte o manual do fabricante para obter dicas de solução de problemas ou substitua o ACB, se necessário.
O ACB é conhecido por sua eficiência energética, pois pode interromper rapidamente grandes correntes e reduzir possíveis perdas de eletricidade durante erros do sistema elétrico. No entanto, vários componentes usam energia até que o arco seja dividido e resfriado, causando perdas do ACB durante a operação.
Mas uma das tendências crescentes é que muitos fabricantes estão incorporando práticas ecologicamente corretas ao produzir seus produtos, incluindo ACB, por meio do uso de:
Além disso, alguns fabricantes também estão integrando tecnologias exclusivas em seus disjuntores, como IoT (Internet das Coisas) para melhorar sua facilidade de uso para os clientes. Embora integrar tais tecnologias ainda seja raro hoje em dia.
Se você está procurando um fabricante com ampla experiência em disjuntores, IALLWay pode ser o ideal para você. A iALLWay fornece vários tipos de ACB que podem ser ajustados às suas necessidades específicas, incluindo:
Portanto, não hesite em procurar orientação profissional da iALLWay e peça agora mesmo um orçamento para seu sistema elétrico.
Recursos:
Solução de problemas comuns de ACB
Princípios de funcionamento e benefícios dos disjuntores de ar
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