Mute
US29928463521934
O IDR (Interruptor Diferencial Residual) em circuitos trifásicos não atua por desbalanceamento de carga. Sua atuação ocorre exclusivamente quando existe corrente residual, ou seja, corrente de fuga para o terra. O dispositivo funciona medindo a soma vetorial das correntes que atravessam o seu sensor toroidal interno. Todas as fases, e o neutro quando existir, passam pelo mesmo núcleo magnético, sendo verificado continuamente se toda corrente que sai também retorna pelo circuito. Matematicamente...
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