自动重合闸工作原理
时间: 2022-11-08 08:17:56 浏览次数:170
自动重合闸是解决RCD误动作造成电源中断问题的有效方法。自动重合闸一般用在高压电力系统,而且取得了非常好的效果。但出于安全考虑,现在还没有在低压民用电力系统中推广使用,中国通信系统近几年开始使用,并且制定了标准:YD/T 2346-2011《通信用自动重合闸剩余电流保护器技术条件》,使用效果明显

      自动重合闸是解决RCD误动作造成电源中断问题的有效方法。自动重合闸一般用在高压电力系统,而且取得了非常好的效果。但出于安全考虑,现在还没有在低压民用电力系统中推广使用,中国通信系统近几年开始使用,并且制定了标准:YD/T 2346-2011《通信用自动重合闸剩余电流保护器技术条件》,使用效果明显。当雷击造成RCD误动作使电路断开时,自动重合闸剩余电流保护器会自动合上开关。由于雷击电流是短暂的,雷击过去后I1≈I2,合闸成功,电路恢复供电,通信恢复。


      自动(dong)(dong)(dong)重(zhong)合(he)(he)闸(zha)(zha)是(shi)(shi)(shi)有(you)条件的,必(bi)须考虑安全等因素(su)。自动(dong)(dong)(dong)重(zhong)合(he)(he)有(you)两种(zhong)(zhong)(zhong)方(fang)法,一(yi)种(zhong)(zhong)(zhong)是(shi)(shi)(shi)检(jian)测(ce)漏(lou)电(dian)(dian)(dian)流情况(kuang),决(jue)定是(shi)(shi)(shi)否重(zhong)合(he)(he);另(ling)一(yi)种(zhong)(zhong)(zhong)是(shi)(shi)(shi)不检(jian)测(ce),自动(dong)(dong)(dong)重(zhong)合(he)(he)。自动(dong)(dong)(dong)检(jian)测(ce)L-PE漏(lou)电(dian)(dian)(dian)故障的重(zhong)合(he)(he)装置(以下(xia)简称检(jian)测(ce)重(zhong)合(he)(he)闸(zha)(zha))由电(dian)(dian)(dian)动(dong)(dong)(dong)操作(zuo)机构、控(kong)制(zhi)电(dian)(dian)(dian)路、检(jian)测(ce)电(dian)(dian)(dian)路、输出接口组成(cheng),检(jian)测(ce)电(dian)(dian)(dian)路与重(zhong)合(he)(he)闸(zha)(zha)配合(he)(he)使用(yong),在(zai)重(zhong)合(he)(he)闸(zha)(zha)控(kong)制(zhi)电(dian)(dian)(dian)路操作(zuo)下(xia)完成(cheng)检(jian)测(ce),根据检(jian)测(ce)结果决(jue)定是(shi)(shi)(shi)否重(zhong)合(he)(he)闸(zha)(zha)。


      检(jian)(jian)(jian)测电(dian)路(lu)分别(bie)接在RCD相(xiang)线(xian)(xian)(xian)(xian)、PE线(xian)(xian)(xian)(xian)、接地电(dian)阻(zu)Re1和Re2、变压器中性N线(xian)(xian)(xian)(xian),通过(guo)相(xiang)线(xian)(xian)(xian)(xian)、PE线(xian)(xian)(xian)(xian)、接地电(dian)阻(zu)Re1和Re2、变压器中性N线(xian)(xian)(xian)(xian)、检(jian)(jian)(jian)测电(dian)路(lu)构成(cheng)回路(lu),检(jian)(jian)(jian)测电(dian)路(lu)PE线(xian)(xian)(xian)(xian)无(wu)需连(lian)接设备(bei)外(wai)壳,也(ye)可(ke)(ke)以(yi)通过(guo)相(xiang)线(xian)(xian)(xian)(xian)、设备(bei)外(wai)壳、P E线(xian)(xian)(xian)(xian)构成(cheng)回路(lu),重合闸(zha)检(jian)(jian)(jian)测电(dian)路(lu)P E线(xian)(xian)(xian)(xian)需要连(lian)接设备(bei)外(wai)壳。RCD脱(tuo)扣,重合闸(zha)检(jian)(jian)(jian)漏电(dian)电(dian)路(lu)分别(bie)是(shi)a-P E、b-P E、c-P E。检(jian)(jian)(jian)测电(dian)路(lu)信号(hao)既可(ke)(ke)以(yi)是(shi)直流也(ye)可(ke)(ke)以(yi)是(shi)交流,电(dian)压不超过(guo)24V。

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