描述
许多时候,引起断路器跳闸的原因就是断路器的选型错误。尤其是在进行电路改造时,一定要注意观察断路器的型号,必要时,应及时更换。
断路器在进行选型时应做如下考虑:
电线线方:断路器的电流,应小于电线的载流量。否则,很可能发生过载不跳闸的情况,起不到保护作用。
总开关电流:支路开关的电流,应小于总开关电流,以免发生越级跳闸的现象。
插座数量:如果该回路插座数量过多,应考虑增加断路器电流和干路电线的线方,以免造成过载。
断路器级数:一般情况下,从经济角度和安全角度考虑,普通五孔插座回路的断路器可以使用单极断路器,而大功率电器所用的三孔插座回路,需要使用二极断路器。
断路器的保护功能:所有插座回路,必须使用带漏电的断路器,电灯回路和主开关不建议使用漏电断路器,以免发生误动作。
常见的漏电断路器选型为1PC16漏电断路器、1PC20漏电断路器和2PC32漏电断路器。Cxx即断路器的额定电流为xx安。
一般来说,家用配电箱支路开关的断路器电流不得大于32A,因为楼道内的电线为6平方,单用户电流过大,容易造成楼道失火。
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