在发生电路故障或异常情况下,随着电流的增加,电上升可能损坏电路中的一些重要器件,也可能烧毁电路甚至引起火灾。如果电路安装准确,熔断器将异常升高到一定的高度和热量时,熔断器切断电流,从而保护电路的安全运行。
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