有(you)部分人总(zong)会(hui)问为(wei)什么LED全(quan)彩显(xian)示屏(ping)配电(dian)(dian)箱频(pin)繁(fan)跳(tiao)闸(zha)？下面LED全(quan)彩显(xian)示屏(ping)就对(dui)LED全(quan)彩显(xian)示屏(ping)频(pin)繁(fan)跳(tiao)闸(zha)做一个(ge)简单(dan)的分析。希望能(neng)解决(jue)您(nin)LED全(quan)彩显(xian)示屏(ping)配电(dian)(dian)箱跳(tiao)闸(zha)的疑惑。

      一般LED全彩显示屏配电(dian)箱(xiang)频(pin)繁跳闸有(you)四点因素：漏(lou)电(dian)保(bao)护(hu)器(qi)***不合(he)理、在保(bao)护(hu)范围内没有(you)形成有(you)效(xiao)的二级或(huo)***漏(lou)电(dian)保(bao)护(hu)、漏(lou)电(dian)保(bao)护(hu)器(qi)本身有(you)一定的局限性(三相电(dian)用电(dian)不平衡)、漏(lou)电(dian)保(bao)护(hu)器(qi)选型不合(he)理等(deng)等(deng)。

1、漏电(dian)保护(hu)器不(bu)合(he)理

      由(you)于LED全彩(cai)显示屏安装现场(chang)所具有的特殊性以及漏(lou)电(dian)(dian)保护(hu)器本身不可避免的误动和拒动，再加上没有按照实际用(yong)电(dian)(dian)情况对漏(lou)电(dian)(dian)保护(hu)器进行布置，造(zao)成了总漏(lou)电(dian)(dian)保护(hu)器频繁跳闸。

LED显示屏解(jie)决方案：这种情况除了加强(qiang)管(guan)理外，还(hai)需(xu)要从技(ji)术的角度(du)，根据实(shi)际情况对漏电保护(hu)器进行(xing)合理布置(zhi)。

2、在保护范围内没有形成有效的二级或漏电保护

      开关箱内的末级漏(lou)电保护器(qi)是用电设备的主(zhu)保护，由于LED全彩显示屏内金属导体(ti)很多(duo)，电线接头较(jiao)多(duo)，如果导线绝缘不是很好，就会导致经(jing)常(chang)(chang)漏(lou)电的状况；有的还加了一些(xie)插座，在很多(duo)时候都不装漏(lou)电保护器(qi)，经(jing)常(chang)(chang)造成漏(lou)电。

LED显示屏解决(jue)方案：只有在(zai)每个保护(hu)(hu)范围内形成有效的二(er)级或***漏电保护(hu)(hu)模式，才能有效地减少漏电保护(hu)(hu)器的频(pin)繁跳闸。

3、漏电(dian)保护器(qi)本身(shen)有一定的(de)局限(xian)性(三相电(dian)用电(dian)不(bu)平衡)

      目前的漏(lou)(lou)电(dian)保(bao)护器(qi)(qi)，不论是电(dian)磁(ci)(ci)(ci)型还是电(dian)子(zi)型均(jun)采用磁(ci)(ci)(ci)感(gan)应电(dian)压互感(gan)器(qi)(qi)拾取用电(dian)设备(bei)主(zhu)回(hui)路中(zhong)的漏(lou)(lou)电(dian)流(liu)，三相或三相四线在(zai)磁(ci)(ci)(ci)环中(zhong)不可能(neng)布置完全均(jun)衡。LED全彩显示屏(ping)的三相用电(dian)负荷也不可能(neng)完全平衡，在(zai)大电(dian)流(liu)下或较高的过电(dian)压下，会在(zai)有很高导磁(ci)(ci)(ci)率(lv)的磁(ci)(ci)(ci)环中(zhong)感(gan)应出一定的电(dian)动势(shi)，这个(ge)电(dian)动势(shi)大到一定程度，就会导致(zhi)漏(lou)(lou)电(dian)保(bao)护器(qi)(qi)跳闸。

4、漏(lou)电保护器选型不合理

      开关(guan)箱内(nei)使用(yong)的(de)额(e)(e)定漏(lou)电(dian)(dian)(dian)动(dong)作电(dian)(dian)(dian)流(liu)超(chao)(chao)过(guo)了30mA或(huo)者是(shi)超(chao)(chao)过(guo)用(yong)电(dian)(dian)(dian)设(she)备额(e)(e)定电(dian)(dian)(dian)流(liu)两倍以上的(de)漏(lou)电(dian)(dian)(dian)保(bao)(bao)(bao)护(hu)器(qi)，或(huo)是(shi)选用(yong)了带延(yan)时型(xing)的(de)漏(lou)电(dian)(dian)(dian)保(bao)(bao)(bao)护(hu)器(qi)，由于(yu)额(e)(e)定漏(lou)电(dian)(dian)(dian)动(dong)作电(dian)(dian)(dian)流(liu)的(de)提高或(huo)保(bao)(bao)(bao)护(hu)灵敏(min)度的(de)下降，发生漏(lou)电(dian)(dian)(dian)故障(zhang)时，末(mo)级漏(lou)电(dian)(dian)(dian)保(bao)(bao)(bao)护(hu)器(qi)没(mei)有(you)动(dong)作，上级漏(lou)电(dian)(dian)(dian)保(bao)(bao)(bao)护(hu)器(qi)就可(ke)能(neng)动(dong)作。

LED显(xian)(xian)示(shi)屏解决方(fang)案：在给下(xia)面(mian)LED全彩显(xian)(xian)示(shi)屏通(tong)电(dian)(dian)(dian)(dian)(dian)时(shi)的(de)(de)启(qi)动电(dian)(dian)(dian)(dian)(dian)流(liu)往往都比较大(da)，此(ci)大(da)电(dian)(dian)(dian)(dian)(dian)流(liu)可能(neng)会使(shi)漏电(dian)(dian)(dian)(dian)(dian)保(bao)护器跳闸。因此(ci)，应(ying)尽可能(neng)分批(pi)次地给显(xian)(xian)示(shi)屏的(de)(de)箱体上电(dian)(dian)(dian)(dian)(dian)。另(ling)外，一般应(ying)选(xuan)用(yong)对(dui)浪涌(yong)过电(dian)(dian)(dian)(dian)(dian)压、过电(dian)(dian)(dian)(dian)(dian)流(liu)不太敏感的(de)(de)电(dian)(dian)(dian)(dian)(dian)磁型漏电(dian)(dian)(dian)(dian)(dian)保(bao)护器；或(huo)选(xuan)用(yong)比额(e)定电(dian)(dian)(dian)(dian)(dian)流(liu)大(da)1.5~2倍的(de)(de)电(dian)(dian)(dian)(dian)(dian)子(zi)式漏电(dian)(dian)(dian)(dian)(dian)保(bao)护器，但作为(wei)末(mo)级漏电(dian)(dian)(dian)(dian)(dian)保(bao)护，额(e)定漏电(dian)(dian)(dian)(dian)(dian)动作电(dian)(dian)(dian)(dian)(dian)流(liu)不应(ying)大(da)于30mA。