斷火限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)又稱(cheng)行程(cheng)(cheng)限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)，用(yong)(yong)于(yu)控(kong)制(zhi)機械設(she)備的(de)(de)行程(cheng)(cheng)及限(xian)(xian)(xian)位(wei)保(bao)護(hu)(hu)。在實際生產中，將行程(cheng)(cheng)限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)安裝在預先安排的(de)(de)位(wei)置，當裝于(yu)生產機械運動部件(jian)上的(de)(de)模塊撞擊行程(cheng)(cheng)開(kai)(kai)(kai)關(guan)(guan)時，行程(cheng)(cheng)限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)的(de)(de)觸點動作(zuo)(zuo)，實現電(dian)(dian)路(lu)的(de)(de)切換(huan)。因此(ci)，斷火限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)是一種根據運動部件(jian)的(de)(de)行程(cheng)(cheng)位(wei)置而切換(huan)電(dian)(dian)路(lu)的(de)(de)電(dian)(dian)器，它的(de)(de)作(zuo)(zuo)用(yong)(yong)原理與按鈕(niu)類似。限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)廣(guang)泛用(yong)(yong)于(yu)各類機床和起重機械，用(yong)(yong)以控(kong)制(zhi)其行程(cheng)(cheng)、進行終端限(xian)(xian)(xian)位(wei)保(bao)護(hu)(hu)。在電(dian)(dian)梯(ti)的(de)(de)控(kong)制(zhi)電(dian)(dian)路(lu)中，還利用(yong)(yong)行程(cheng)(cheng)限(xian)(xian)(xian)位(wei)開(kai)(kai)(kai)關(guan)(guan)來控(kong)制(zhi)開(kai)(kai)(kai)關(guan)(guan)轎(jiao)門(men)的(de)(de)速度、自動開(kai)(kai)(kai)關(guan)(guan)門(men)的(de)(de)限(xian)(xian)(xian)位(wei)，轎(jiao)廂的(de)(de)上、下限(xian)(xian)(xian)位(wei)保(bao)護(hu)(hu)。

明泰電(dian)(dian)(dian)(dian)氣（蘇州(zhou)）有限公司是正泰集團在蘇州(zhou)地區一家授權的經(jing)銷企業，連(lian)續十年銷量居正泰營(ying)銷網絡名，公司主要經(jing)營(ying)“正泰”牌配電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)器(qi)(qi)、控制電(dian)(dian)(dian)(dian)器(qi)(qi)、終端電(dian)(dian)(dian)(dian)器(qi)(qi)、電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)器(qi)(qi)、電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)子、儀器(qi)(qi)儀表、建筑電(dian)(dian)(dian)(dian)器(qi)(qi)、高壓電(dian)(dian)(dian)(dian)器(qi)(qi)及成套設備(bei)。

限(xian)位開(kai)(kai)關，指(zhi)為(wei)保護內置微動開(kai)(kai)關免受外(wai)力、水、油、氣體和塵埃等的(de)(de)(de)損害，而組裝在外(wai)殼內的(de)(de)(de)開(kai)(kai)關，尤其適用于對機械強度(du)和環境適應 性有特(te)殊要求的(de)(de)(de)地方。　形狀大(da)(da)致(zhi)分為(wei)橫向型(xing)、豎(shu)向型(xing)和復(fu)合(he)型(xing)。下圖表(biao)示典型(xing)的(de)(de)(de)豎(shu)向型(xing)限(xian)位開(kai)(kai)關的(de)(de)(de)構造。限(xian)位開(kai)(kai)關大(da)(da)致(zhi)上是由五(wu)個構成要素組成的(de)(de)(de)。

在洗衣(yi)機(ji)的(de)脫水（甩(shuai)干）過程中轉速很高，如(ru)果此時(shi)有(you)人(ren)由于疏(shu)忽打開洗衣(yi)機(ji)的(de)門(men)或蓋(gai)(gai)后，腳(jiao)踏(ta)開關報價(jia)，再把手伸進去，很容易對人(ren)造成(cheng)傷(shang)害，腳(jiao)踏(ta)開關價(jia)格，為了避免這種事故(gu)的(de)發(fa)生，在洗衣(yi)機(ji)的(de)門(men)或蓋(gai)(gai)上裝了個電(dian)接點，一(yi)旦有(you)人(ren)開啟洗衣(yi)機(ji)的(de)門(men)或蓋(gai)(gai)時(shi)，就(jiu)自(zi)動(dong)(dong)把電(dian)機(ji)斷電(dian)，甚至還(huan)要靠機(ji)械辦法(fa)聯動(dong)(dong)，腳(jiao)踏(ta)開關廠家(jia)，使門(men)或蓋(gai)(gai)一(yi)打開就(jiu)立刻“剎車”，鹽城腳(jiao)踏(ta)開關，強迫轉動(dong)(dong)著(zhu)的(de)部件停(ting)下來，免得傷(shang)害人(ren)身。

限位(wei)開關(guan)(guan)(guan)(guan)又(you)稱(cheng)行程(cheng)限位(wei)開關(guan)(guan)(guan)(guan)，用于控(kong)制機械(xie)設備的行程(cheng)及限位(wei)保護。在實際生產(chan)中，將(jiang)行程(cheng)限位(wei)開關(guan)(guan)(guan)(guan)安(an)裝在預先安(an)排(pai)的位(wei)置，當裝于生產(chan)機械(xie)運動(dong)(dong)部件上的模塊撞擊行程(cheng)開關(guan)(guan)(guan)(guan)時，行程(cheng)限位(wei)開關(guan)(guan)(guan)(guan)的觸點(dian)動(dong)(dong)作，實現電路的切換