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配電箱的保護環節

來源：boonu.cn 發布時間：2023年11月11日

在(zai)配電箱的(de)設計中，考慮了我(wo)(wo)國許(xu)多企業對外部環境因素的(de)分析和影響。為確保其正常(chang)工(gong)作，避免損失，實際控制電路中的(de)保護(hu)環節(jie)至關重要。掌握和學(xue)習這(zhe)些信息(xi)保護(hu)系(xi)統電路的(de)技術原理對我(wo)(wo)們非常(chang)有益。接(jie)下來我(wo)(wo)們來看看配電箱的(de)保護(hu)。
除分配電(dian)箱電(dian)路除了兩(liang)個(ge)或兩(liang)個(ge)以上的(de)文化保護環(huan)節外，還有缺相保護(即(ji)三相電(dian)源(yuan)異(yi)相時，電(dian)路被切斷)、欠壓保護、過流保護等(deng)環(huan)節。
一、電路(lu)短路(lu)保(bao)護電路(lu)。
配電(dian)(dian)箱(xiang)短(duan)路(lu)保護(hu)是指當故(gu)(gu)障電(dian)(dian)路(lu)短(duan)路(lu)時，可以切斷(duan)其電(dian)(dian)源的保護(hu)環節。故(gu)(gu)障保險絲(si)(si)通(tong)常用于短(duan)路(lu)保護(hu)。保險絲(si)(si)盒1FU和2FU都(dou)是短(duan)路(lu)保護(hu)環節。在實際電(dian)(dian)路(lu)中(zhong)，一(yi)些保險絲(si)(si)與閘(zha)刀開關集成(cheng)在一(yi)起。畫(hua)電(dian)(dian)路(lu)圖(tu)時，熔斷(duan)器畫(hua)在刀閘(zha)上，短(duan)路(lu)保護(hu)熔斷(duan)器全部設置在近電(dian)(dian)位(wei)置，即被保護(hu)電(dian)(dian)路(lu)的電(dian)(dian)源引(yin)入位(wei)置。
二、電(dian)氣(qi)過載(zai)控制鏈路。
在(zai)過(guo)載(zai)環境下，配(pei)電(dian)(dian)箱的(de)(de)護(hu)(hu)工保護(hu)(hu)是電(dian)(dian)力(li)傳動(dong)系統(tong)的(de)(de)重要保護(hu)(hu)和管理環節。過(guo)載(zai)能力(li)保護(hu)(hu)是指電(dian)(dian)機過(guo)載(zai)時能自動(dong)切斷電(dian)(dian)機的(de)(de)保護(hu)(hu)。熱繼(ji)電(dian)(dian)器可以(yi)實現過(guo)載(zai)保護(hu)(hu)。通過(guo)電(dian)(dian)路(lu)(lu)(lu)比原電(dian)(dian)路(lu)(lu)(lu)簡單得多(duo)，原電(dian)(dian)路(lu)(lu)(lu)是熱繼(ji)電(dian)(dian)器FR。在(zai)三(san)相異步電(dian)(dian)機的(de)(de)定子繞組發生電(dian)(dian)路(lu)(lu)(lu)中，熱繼(ji)電(dian)(dian)器的(de)(de)常閉觸點與控制信息回路(lu)(lu)(lu)的(de)(de)交(jiao)流接觸器的(de)(de)KM線圈(quan)下端串聯。
QK關閉刀閘，按下按鈕開關SB，操作芯線切換接(jie)觸器KM，關閉KM主觸點(dian)，電(dian)(dian)機(ji)(ji)(ji)(ji)M開始(shi)運行。配(pei)電(dian)(dian)箱(xiang)電(dian)(dian)機(ji)(ji)(ji)(ji)過載時，電(dian)(dian)機(ji)(ji)(ji)(ji)定子繞組電(dian)(dian)流過大，通過熱繼電(dian)(dian)器的熱元(yuan)件過大。在熱運行中，熱電(dian)(dian)觸點(dian)常開常閉，使(shi)輔助電(dian)(dian)路(lu)的交流線圈(quan)與KM接(jie)觸，KM的主觸點(dian)斷開，激勵(li)電(dian)(dian)機(ji)(ji)(ji)(ji)，從(cong)而保護電(dian)(dian)機(ji)(ji)(ji)(ji)。
三、電路過流保(bao)護(hu)和欠壓保(bao)護(hu)。
配電(dian)(dian)(dian)(dian)箱電(dian)(dian)(dian)(dian)路過流保(bao)護電(dian)(dian)(dian)(dian)流繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)和電(dian)(dian)(dian)(dian)路欠壓(ya)(ya)(ya)保(bao)護電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)。這兩種繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)具有特(te)殊的(de)動(dong)作，可以(yi)保(bao)護電(dian)(dian)(dian)(dian)路免(mian)受過流和欠壓(ya)(ya)(ya)。通(tong)過電(dian)(dian)(dian)(dian)流繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)線(xian)圈的(de)電(dian)(dian)(dian)(dian)流等于(yu)(yu)或(huo)大(da)于(yu)(yu)設(she)定(ding)電(dian)(dian)(dian)(dian)流。它可以(yi)工作，線(xian)圈的(de)電(dian)(dian)(dian)(dian)流小于(yu)(yu)設(she)定(ding)的(de)電(dian)(dian)(dian)(dian)流。它不是作用電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)，而是線(xian)圈電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)和設(she)定(ding)值。
如果配電(dian)(dian)(dian)(dian)(dian)箱的線(xian)圈電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值低于(yu)設(she)定的電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值，電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)繼(ji)電(dian)(dian)(dian)(dian)(dian)器將立即恢(hui)復到原始(shi)狀態(tai)(打開(kai)常(chang)開(kai)觸點，關閉常(chang)閉觸點)。電(dian)(dian)(dian)(dian)(dian)流繼(ji)電(dian)(dian)(dian)(dian)(dian)器和電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)繼(ji)電(dian)(dian)(dian)(dian)(dian)器用作電(dian)(dian)(dian)(dian)(dian)路過流和欠壓(ya)(ya)保護(hu)電(dian)(dian)(dian)(dian)(dian)路。
上上是(shi)配(pei)電箱保護環節的介紹。該設(she)備體積小(xiao)，安裝簡單(dan)，技術性能特殊，位置固定，配(pei)置功能獨(du)特，不受場地(di)限制，應用廣泛，運行穩定可靠，空間利用率高，占地(di)面積小(xiao)，環保效果好。

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