有部分人(ren)總(zong)會問為什么全彩(cai)LED顯示(shi)屏(ping)配電箱(xiang)頻繁跳閘(zha)？下面泰安奇(qi)美特廣(guang)告公司針對LED全彩(cai)顯示(shi)屏(ping)頻繁跳閘(zha)做一個(ge)簡單的(de)分析。希(xi)望能解決您(nin)LED全彩(cai)顯示(shi)屏(ping)配電箱(xiang)跳閘(zha)的(de)疑惑。

1、漏電保護器布局不合理

　　由于(yu)LED全彩顯(xian)示屏安裝現(xian)場所具(ju)有的特殊性(xing)，如接線錯誤、線路破損、開(kai)(kai)關(guan)箱內漏(lou)(lou)(lou)電(dian)(dian)保(bao)護器損壞(huai)、部(bu)分用(yong)電(dian)(dian)器具(ju)沒有經(jing)過(guo)開(kai)(kai)關(guan)箱等原因(yin)，以及(ji)漏(lou)(lou)(lou)電(dian)(dian)保(bao)護器本身不可(ke)避免(mian)的誤動和拒動，再加上沒有按(an)照實(shi)際用(yong)電(dian)(dian)情況對漏(lou)(lou)(lou)電(dian)(dian)保(bao)護器進行布置，造成了總漏(lou)(lou)(lou)電(dian)(dian)保(bao)護器頻繁跳閘。

　　對(dui)于這種情況除了加強管理外，還需要從(cong)技術(shu)的(de)(de)(de)角度，根據實(shi)際情況對(dui)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護器(qi)(qi)進行合理布置(zhi)。進線總電(dian)(dian)(dian)(dian)源上(shang)的(de)(de)(de)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護器(qi)(qi)，可(ke)主(zhu)要做為防止電(dian)(dian)(dian)(dian)氣火災隱患和(he)電(dian)(dian)(dian)(dian)氣短路(lu)的(de)(de)(de)總保(bao)(bao)護，兼做每(mei)個(ge)小的(de)(de)(de)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護范圍(wei)的(de)(de)(de)后(hou)備保(bao)(bao)護，它的(de)(de)(de)額定漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)動作電(dian)(dian)(dian)(dian)流可(ke)在200～500mA之間選擇(ze)，額定漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)動作時(shi)間可(ke)選擇(ze)0.2~0.3s。這樣，可(ke)極大地減少浪(lang)涌電(dian)(dian)(dian)(dian)壓、浪(lang)涌電(dian)(dian)(dian)(dian)流、電(dian)(dian)(dian)(dian)磁干擾對(dui)總漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護器(qi)(qi)的(de)(de)(de)影響，提高總漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護器(qi)(qi)動作的(de)(de)(de)選擇(ze)性和(he)可(ke)靠性。如(ru)果(guo)能(neng)使每(mei)個(ge)漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護范圍(wei)內的(de)(de)(de)二(er)級漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護處于有效保(bao)(bao)護狀態，就可(ke)以大大地減少工地總漏(lou)(lou)(lou)電(dian)(dian)(dian)(dian)保(bao)(bao)護器(qi)(qi)的(de)(de)(de)頻繁跳(tiao)閘機(ji)率。

2、在保護范圍內沒有形成有效的二級或三級漏電保護

　　開關箱(xiang)內(nei)的末級漏電保(bao)護(hu)器(qi)(qi)是用(yong)電設備的主保(bao)護(hu)，如果末級漏電保(bao)護(hu)器(qi)(qi)不(bu)裝、損(sun)壞或選型(xing)不(bu)當(dang)，將可能導致(zhi)上(shang)級漏電保(bao)護(hu)器(qi)(qi)頻繁(fan)跳閘。由(you)于(yu)LED全彩顯示屏內(nei)金屬導體很多(duo)，電線接頭較多(duo)，如果導線絕緣不(bu)是很好，就會導致(zhi)經常(chang)(chang)漏電的狀況；有(you)的還加(jia)了一些插座，在很多(duo)時(shi)候都不(bu)裝漏電保(bao)護(hu)器(qi)(qi)，經常(chang)(chang)造成漏電。

3、漏電保護器本身有一定的局限性(三相電用電不平衡)

　　目前的(de)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)器(qi)(qi)，不論是電(dian)(dian)(dian)(dian)(dian)(dian)磁型還是電(dian)(dian)(dian)(dian)(dian)(dian)子型均采(cai)(cai)用磁感(gan)應電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)互感(gan)器(qi)(qi)拾取用電(dian)(dian)(dian)(dian)(dian)(dian)設備主回路中的(de)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流，三(san)相(xiang)或三(san)相(xiang)四(si)線在磁環(huan)(huan)(huan)中不可(ke)(ke)能布置完(wan)全(quan)均衡(heng)。全(quan)彩LED顯示屏(ping)的(de)三(san)相(xiang)用電(dian)(dian)(dian)(dian)(dian)(dian)負荷也(ye)不可(ke)(ke)能完(wan)全(quan)平衡(heng)，在大(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)流下或較(jiao)(jiao)高的(de)過電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下，會在有很高導磁率(lv)的(de)磁環(huan)(huan)(huan)中感(gan)應出(chu)一定(ding)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)勢，這個(ge)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)勢大(da)(da)(da)到一定(ding)程度，就會導致(zhi)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)器(qi)(qi)跳閘。由(you)于(yu)額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流越(yue)大(da)(da)(da)的(de)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)器(qi)(qi)采(cai)(cai)用相(xiang)對(dui)較(jiao)(jiao)大(da)(da)(da)的(de)磁環(huan)(huan)(huan)，產生的(de)漏(lou)磁通(tong)也(ye)相(xiang)對(dui)較(jiao)(jiao)大(da)(da)(da)，且漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流要克服(fu)磁環(huan)(huan)(huan)本身的(de)磁化力，導致(zhi)實際使用的(de)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)器(qi)(qi)額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流越(yue)大(da)(da)(da)，靈敏度越(yue)低，拒動(dong)率(lv)也(ye)越(yue)大(da)(da)(da)。

　　漏(lou)電保護(hu)(hu)(hu)器(qi)在(zai)額定(ding)漏(lou)電動(dong)作(zuo)電流和額定(ding)漏(lou)電不動(dong)作(zuo)電流之(zhi)間有一(yi)段動(dong)作(zuo)不確定(ding)區(qu)域，漏(lou)電保護(hu)(hu)(hu)器(qi)的(de)漏(lou)電流在(zai)此區(qu)域內波動(dong)時(shi)，可能導(dao)致漏(lou)電保護(hu)(hu)(hu)器(qi)無規律跳(tiao)閘。

4、漏電保護器選型不合理

　　開關(guan)箱內(nei)使用(yong)的(de)額定(ding)(ding)漏(lou)(lou)電動(dong)作電流(liu)超(chao)過(guo)了(le)30mA或者是超(chao)過(guo)用(yong)電設備額定(ding)(ding)電流(liu)兩倍以上的(de)漏(lou)(lou)電保(bao)護(hu)器(qi)，或是選用(yong)了(le)帶延(yan)時型的(de)漏(lou)(lou)電保(bao)護(hu)器(qi)，由(you)于額定(ding)(ding)漏(lou)(lou)電動(dong)作電流(liu)的(de)提高或保(bao)護(hu)靈敏度(du)的(de)下降，發生漏(lou)(lou)電故障時，末級漏(lou)(lou)電保(bao)護(hu)器(qi)沒有(you)動(dong)作，上級漏(lou)(lou)電保(bao)護(hu)器(qi)就(jiu)可能動(dong)作。

　　在給(gei)LED大(da)屏(ping)幕通電(dian)(dian)時(shi)的(de)啟動電(dian)(dian)流往(wang)往(wang)都比(bi)較大(da)，此大(da)電(dian)(dian)流可能會使漏(lou)電(dian)(dian)保(bao)(bao)護器跳閘。因此，應盡(jin)可能分批次地給(gei)顯示屏(ping)的(de)箱體上電(dian)(dian)。另外，一般應選用(yong)對浪涌(yong)過電(dian)(dian)壓(ya)、過電(dian)(dian)流不(bu)太敏感的(de)電(dian)(dian)磁(ci)型漏(lou)電(dian)(dian)保(bao)(bao)護器；或選用(yong)比(bi)額(e)定(ding)電(dian)(dian)流大(da)1.5~2倍的(de)電(dian)(dian)子式漏(lou)電(dian)(dian)保(bao)(bao)護器，但(dan)作(zuo)為(wei)末級漏(lou)電(dian)(dian)保(bao)(bao)護，額(e)定(ding)漏(lou)電(dian)(dian)動作(zuo)電(dian)(dian)流不(bu)應大(da)于(yu)30mA。

　　總之，泰安led顯(xian)(xian)示(shi)屏公司已分(fen)析了(le)漏(lou)電(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)(hu)器(qi)頻(pin)繁跳(tiao)閘(zha)是各(ge)種因素(su)綜(zong)合(he)作用(yong)的(de)(de)(de)結(jie)果(guo)，最主(zhu)要的(de)(de)(de)是要合(he)理(li)布置(zhi)漏(lou)電(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)(hu)器(qi)，縮小二(er)或三(san)級漏(lou)電(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)(hu)器(qi)的(de)(de)(de)保(bao)(bao)(bao)護(hu)(hu)范圍，三(san)相用(yong)電(dian)(dian)(dian)分(fen)布盡均勻(yun)，正確選擇(ze)漏(lou)電(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)(hu)器(qi)和接(jie)線，使每個(ge)范圍內的(de)(de)(de)二(er)或三(san)級漏(lou)電(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)(hu)器(qi)處于(yu)有效保(bao)(bao)(bao)護(hu)(hu)狀態；另一(yi)方面(mian)就(jiu)是加(jia)強用(yong)電(dian)(dian)(dian)管理(li)和通過培訓(xun)提高用(yong)電(dian)(dian)(dian)人員的(de)(de)(de)自身素(su)質，杜絕非電(dian)(dian)(dian)工(gong)接(jie)線，這(zhe)樣(yang)就(jiu)可以(yi)既提高用(yong)電(dian)(dian)(dian)的(de)(de)(de)安全(quan)性，又可以(yi)減(jian)少漏(lou)電(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)(hu)器(qi)的(de)(de)(de)頻(pin)繁跳(tiao)閘(zha)，給LED全(quan)彩顯(xian)(xian)示(shi)屏的(de)(de)(de)正常的(de)(de)(de)工(gong)作創造(zao)較好(hao)的(de)(de)(de)供電(dian)(dian)(dian)條(tiao)件。