斷路器、接觸器、中間繼電器、熱繼電器、按鈕、指示燈、萬能轉換開關和行程開關是大連配電箱電氣控(kong)制(zhi)回路中最常見的(de)八種元件。

    低壓斷路器又(you)稱(cheng)為自動(dong)(dong)空氣開關，可手動(dong)(dong)開關，又(you)能(neng)用來(lai)分配電(dian)(dian)能(neng)、不頻繁啟(qi)動(dong)(dong)異步(bu)電(dian)(dian)機，對電(dian)(dian)源線、電(dian)(dian)機等實(shi)行(xing)保護，當它(ta)們發(fa)生嚴重過載、短路或欠壓等故障時能(neng)自動(dong)(dong)切斷電(dian)(dian)路。

    大連(lian)配電(dian)(dian)(dian)箱中(zhong)間繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)的(de)(de)原理是將一個輸入信(xin)號變成多(duo)(duo)個輸出信(xin)號或將信(xin)號放大(即增(zeng)大繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)觸(chu)(chu)頭容(rong)量(liang)(liang)(liang))的(de)(de)繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)。其實(shi)(shi)質是電(dian)(dian)(dian)壓繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)，但它的(de)(de)觸(chu)(chu)頭較多(duo)(duo)(可多(duo)(duo)達8對(dui))、觸(chu)(chu)頭容(rong)量(liang)(liang)(liang)可達5-10A、動作靈敏。當其他電(dian)(dian)(dian)器(qi)(qi)的(de)(de)觸(chu)(chu)頭對(dui)數(shu)不(bu)夠時，可借(jie)助中(zhong)間繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)來(lai)擴(kuo)展他們的(de)(de)觸(chu)(chu)頭對(dui)數(shu)，也有通過中(zhong)間繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)實(shi)(shi)現觸(chu)(chu)電(dian)(dian)(dian)通電(dian)(dian)(dian)容(rong)量(liang)(liang)(liang)的(de)(de)擴(kuo)展。

    大(da)連配電箱內的漏(lou)(lou)(lou)電保護器額(e)(e)定(ding)(ding)漏(lou)(lou)(lou)電動作(zuo)電流(liu)不(bu)得大(da)于30mA，額(e)(e)定(ding)(ding)漏(lou)(lou)(lou)電動作(zuo)時(shi)間應小(xiao)于0.1s。使用于潮濕(shi)場所(suo)時(shi)，其額(e)(e)定(ding)(ding)漏(lou)(lou)(lou)電動作(zuo)電流(liu)不(bu)得大(da)于15mA，額(e)(e)定(ding)(ding)漏(lou)(lou)(lou)電動作(zuo)時(shi)間應小(xiao)于0.1s。