下面电子显示屏厂家就LED显示屏频繁跳闸(zha)做(zuo)一个(ge)简单(dan)的(de)分(fen)析(xi)。希望(wang)能解决您LED显示屏跳闸(zha)的(de)问题。

　　1、漏电保(bao)护器布局不合理

　　由(you)于(yu)LED显示屏安装(zhuang)现场所具(ju)有(you)的(de)特殊性，如接线错误、线路破损、开(kai)关箱内漏(lou)电(dian)(dian)(dian)(dian)保(bao)(bao)护器损坏、部分(fen)用电(dian)(dian)(dian)(dian)器具(ju)没有(you)经过开(kai)关箱等原因，以(yi)及漏(lou)电(dian)(dian)(dian)(dian)保(bao)(bao)护器本身不可(ke)避免的(de)误动和拒(ju)动，再(zai)加(jia)上没有(you)按照实际用电(dian)(dian)(dian)(dian)情(qing)况对(dui)漏(lou)电(dian)(dian)(dian)(dian)保(bao)(bao)护器进行布置，造成了总漏(lou)电(dian)(dian)(dian)(dian)保(bao)(bao)护器频繁跳(tiao)闸。

　　对于(yu)这种情况除(chu)了加强管理外，还需要从技术的(de)角度，根据实际情况对漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)器(qi)进行合理布置(zhi)。进线总(zong)(zong)电(dian)源上(shang)的(de)漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)器(qi)，可主(zhu)要做为防止电(dian)气火灾隐患和(he)电(dian)气短路的(de)总(zong)(zong)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)，兼做每个(ge)小的(de)漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)范围的(de)后备保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)，它的(de)额定漏(lou)(lou)(lou)电(dian)动作(zuo)电(dian)流(liu)可在200～500mA之(zhi)间(jian)选(xuan)择(ze)(ze)，额定漏(lou)(lou)(lou)电(dian)动作(zuo)时间(jian)可选(xuan)择(ze)(ze)0.2~0.3s。这样，可极大(da)地(di)减少浪涌电(dian)压(ya)、浪涌电(dian)流(liu)、电(dian)磁干(gan)扰对总(zong)(zong)漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)器(qi)的(de)影(ying)响，提高(gao)总(zong)(zong)漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)器(qi)动作(zuo)的(de)选(xuan)择(ze)(ze)性和(he)可靠(kao)性。如果能(neng)使(shi)每个(ge)漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)范围内(nei)的(de)二(er)级漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)处于(yu)有效保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)状(zhuang)态，就可以大(da)大(da)地(di)减少工地(di)总(zong)(zong)漏(lou)(lou)(lou)电(dian)保(bao)(bao)护(hu)(hu)(hu)(hu)(hu)器(qi)的(de)频繁跳闸(zha)机率。

　　2、在保(bao)护范(fan)围内没有(you)形成有(you)效的二级或三(san)级漏电保(bao)护

　　开(kai)关(guan)箱内(nei)的(de)末级漏(lou)(lou)电保(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)是用电设备的(de)主保(bao)(bao)护(hu)(hu)，如果(guo)末级漏(lou)(lou)电保(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)不装、损坏(huai)或选型不当，将(jiang)可(ke)能(neng)(neng)导(dao)致上级漏(lou)(lou)电保(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)频繁(fan)跳闸。由于LED显示(shi)屏(ping)内(nei)金属导(dao)体很多(duo)，电线接头(tou)较多(duo)，如果(guo)导(dao)线绝缘不是很好，就会导(dao)致经常漏(lou)(lou)电的(de)状况;有(you)(you)的(de)还加了一些插(cha)座，在(zai)很多(duo)时(shi)候都不装漏(lou)(lou)电保(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)，经常造(zao)成漏(lou)(lou)电。只有(you)(you)在(zai)每个保(bao)(bao)护(hu)(hu)范围内(nei)形(xing)成有(you)(you)效(xiao)的(de)二级或三(san)级漏(lou)(lou)电保(bao)(bao)护(hu)(hu)模式，才能(neng)(neng)有(you)(you)效(xiao)地减少漏(lou)(lou)电保(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)的(de)频繁(fan)跳闸。

　　3、漏电保护(hu)器本(ben)身有一(yi)定的局限(xian)性

　　(1)目(mu)前(qian)的(de)(de)漏(lou)电(dian)(dian)保(bao)护(hu)(hu)器，不(bu)论是电(dian)(dian)磁(ci)(ci)型(xing)还是电(dian)(dian)子型(xing)均(jun)采用磁(ci)(ci)感应电(dian)(dian)压互感器拾取用电(dian)(dian)设备(bei)主回路中的(de)(de)漏(lou)电(dian)(dian)流(liu)(liu)，三相(xiang)(xiang)(xiang)或三相(xiang)(xiang)(xiang)四线在磁(ci)(ci)环中不(bu)可(ke)能(neng)布置完全均(jun)衡。LED显(xian)示屏的(de)(de)三相(xiang)(xiang)(xiang)用电(dian)(dian)负荷也不(bu)可(ke)能(neng)完全平衡，在大(da)电(dian)(dian)流(liu)(liu)下或较(jiao)高(gao)的(de)(de)过电(dian)(dian)压下，会在有很(hen)高(gao)导(dao)(dao)磁(ci)(ci)率(lv)的(de)(de)磁(ci)(ci)环中感应出一(yi)定(ding)(ding)的(de)(de)电(dian)(dian)动势，这个电(dian)(dian)动势大(da)到一(yi)定(ding)(ding)程度，就会导(dao)(dao)致(zhi)漏(lou)电(dian)(dian)保(bao)护(hu)(hu)器跳闸。由于(yu)额(e)定(ding)(ding)电(dian)(dian)流(liu)(liu)越大(da)的(de)(de)漏(lou)电(dian)(dian)保(bao)护(hu)(hu)器采用相(xiang)(xiang)(xiang)对较(jiao)大(da)的(de)(de)磁(ci)(ci)环，产生(sheng)的(de)(de)漏(lou)磁(ci)(ci)通(tong)也相(xiang)(xiang)(xiang)对较(jiao)大(da)，且漏(lou)电(dian)(dian)流(liu)(liu)要克服磁(ci)(ci)环本身的(de)(de)磁(ci)(ci)化力(li)，导(dao)(dao)致(zhi)实际(ji)使用的(de)(de)漏(lou)电(dian)(dian)保(bao)护(hu)(hu)器额(e)定(ding)(ding)电(dian)(dian)流(liu)(liu)越大(da)，灵敏度越低，拒动率(lv)也越大(da)。

　　(2)漏(lou)电(dian)(dian)保(bao)护器(qi)(qi)在额定(ding)漏(lou)电(dian)(dian)动(dong)作电(dian)(dian)流和(he)额定(ding)漏(lou)电(dian)(dian)不动(dong)作电(dian)(dian)流之间有一段动(dong)作不确定(ding)区域，漏(lou)电(dian)(dian)保(bao)护器(qi)(qi)的漏(lou)电(dian)(dian)流在此(ci)区域内(nei)波动(dong)时，可能导致漏(lou)电(dian)(dian)保(bao)护器(qi)(qi)无(wu)规律跳闸(zha)。

　　4、漏电保(bao)护器选型不合理(li)

　　(1)开关箱(xiang)内使用(yong)的额(e)(e)定(ding)漏(lou)(lou)电(dian)(dian)动(dong)(dong)作电(dian)(dian)流超过了(le)30mA或者是(shi)(shi)超过用(yong)电(dian)(dian)设备额(e)(e)定(ding)电(dian)(dian)流两(liang)倍(bei)以上(shang)的漏(lou)(lou)电(dian)(dian)保护器(qi)，或是(shi)(shi)选用(yong)了(le)带延时型(xing)的漏(lou)(lou)电(dian)(dian)保护器(qi)，由于额(e)(e)定(ding)漏(lou)(lou)电(dian)(dian)动(dong)(dong)作电(dian)(dian)流的提高(gao)或保护灵敏(min)度(du)的下降，发生漏(lou)(lou)电(dian)(dian)故(gu)障时，末级漏(lou)(lou)电(dian)(dian)保护器(qi)没有动(dong)(dong)作，上(shang)级漏(lou)(lou)电(dian)(dian)保护器(qi)就可(ke)能动(dong)(dong)作。

　　(2)给(ji)LED显示屏通电(dian)(dian)(dian)时(shi)的(de)启动(dong)电(dian)(dian)(dian)流(liu)往往都(dou)比较大，此大电(dian)(dian)(dian)流(liu)可能会使漏(lou)电(dian)(dian)(dian)保(bao)(bao)护器(qi)跳闸。因此，应(ying)尽可能分批次地给(ji)显示屏的(de)箱体上电(dian)(dian)(dian)。另外，一般应(ying)选用对浪涌过电(dian)(dian)(dian)压、过电(dian)(dian)(dian)流(liu)不太敏感的(de)电(dian)(dian)(dian)磁型漏(lou)电(dian)(dian)(dian)保(bao)(bao)护器(qi);或选用比额定电(dian)(dian)(dian)流(liu)大1.5~2倍(bei)的(de)电(dian)(dian)(dian)子式漏(lou)电(dian)(dian)(dian)保(bao)(bao)护器(qi)，但(dan)作为末(mo)级漏(lou)电(dian)(dian)(dian)保(bao)(bao)护，额定漏(lou)电(dian)(dian)(dian)动(dong)作电(dian)(dian)(dian)流(liu)不应(ying)大于30mA。

　　总之(zhi)，漏电(dian)保(bao)(bao)(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)(qi)频繁(fan)跳闸是各种(zhong)因素综(zong)合作(zuo)(zuo)用的(de)(de)结(jie)果，最主要(yao)的(de)(de)是要(yao)合理布置(zhi)漏电(dian)保(bao)(bao)(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)(qi)，缩小二(er)或(huo)三级漏电(dian)保(bao)(bao)(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)(qi)的(de)(de)保(bao)(bao)(bao)(bao)护(hu)(hu)范围，正确选(xuan)择漏电(dian)保(bao)(bao)(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)(qi)和接(jie)线，使(shi)每个范围内的(de)(de)二(er)或(huo)三级漏电(dian)保(bao)(bao)(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)(qi)处于有(you)效保(bao)(bao)(bao)(bao)护(hu)(hu)状(zhuang)态;另一方面就是加强用电(dian)管(guan)理和通过(guo)培训(xun)提高用电(dian)人员的(de)(de)自身素质，杜绝非电(dian)工接(jie)线，这样(yang)就可以既提高用电(dian)的(de)(de)安全性，又可以减少漏电(dian)保(bao)(bao)(bao)(bao)护(hu)(hu)器(qi)(qi)(qi)(qi)的(de)(de)频繁(fan)跳闸，给LED显示屏的(de)(de)正常的(de)(de)工作(zuo)(zuo)创造(zao)较好(hao)的(de)(de)供电(dian)条(tiao)件。

以上都是(shi)电子显示屏厂家为大(da)家整理的相关内容(rong)，希望这篇文章可(ke)以帮助到大(da)家！