明(ming)泰(tai)(tai)電(dian)(dian)(dian)(dian)氣(qi)（蘇州）有限公司是正泰(tai)(tai)集(ji)團在(zai)蘇州地區(qu)一家(jia)授權的經(jing)銷企業，連續十年銷量居正泰(tai)(tai)營銷網絡名，公司主要(yao)經(jing)營“正泰(tai)(tai)”牌配(pei)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)器(qi)(qi)、控制(zhi)電(dian)(dian)(dian)(dian)器(qi)(qi)、終(zhong)端(duan)電(dian)(dian)(dian)(dian)器(qi)(qi)、電(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)器(qi)(qi)、電(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)子、儀器(qi)(qi)儀表、建筑(zhu)電(dian)(dian)(dian)(dian)器(qi)(qi)、高壓電(dian)(dian)(dian)(dian)器(qi)(qi)及成套設備。

限(xian)位開(kai)關，斷火(huo)開(kai)關LX-40，指為保(bao)護內(nei)置微動開(kai)關免受外力、水(shui)、油、氣體和(he)(he)塵埃等的(de)(de)損害(hai)，而組裝在(zai)外殼內(nei)的(de)(de)開(kai)關，尤其適(shi)(shi)用于(yu)對機械強度和(he)(he)環境適(shi)(shi)應 性有特殊要(yao)求的(de)(de)地方。　形狀大(da)(da)致(zhi)分為橫(heng)向(xiang)型(xing)、豎向(xiang)型(xing)和(he)(he)復合型(xing)。下圖(tu)表示典(dian)型(xing)的(de)(de)豎向(xiang)型(xing)限(xian)位開(kai)關的(de)(de)構(gou)造。限(xian)位開(kai)關大(da)(da)致(zhi)上是由五個(ge)構(gou)成(cheng)要(yao)素組成(cheng)的(de)(de)。

斷火限(xian)位開(kai)關就是(shi)用以限(xian)定機(ji)械設備的(de)(de)運動(dong)極限(xian)位置的(de)(de)電氣(qi)開(kai)關。這種開(kai)關有接(jie)觸式的(de)(de)和非(fei)接(jie)觸式的(de)(de)。

??接觸式(shi)的比較直觀，機(ji)械設備的運(yun)動部件(jian)上(shang)(shang)(shang)，安(an)裝上(shang)(shang)(shang)限(xian)位開關(guan)，與其相對運(yun)動的固上(shang)(shang)(shang)安(an)裝極限(xian)位置的擋塊，或者是相反安(an)裝位置。當限(xian)位開關(guan)的機(ji)械觸頭碰上(shang)(shang)(shang)擋塊時(shi)，切斷了(le)(或改(gai)變了(le))控制電路，機(ji)械就停止運(yun)行或改(gai)變運(yun)行。

在電氣控(kong)(kong)制系(xi)統中(zhong)，限(xian)位(wei)開關的(de)作用(yong)(yong)是實現順序控(kong)(kong)制、定位(wei)控(kong)(kong)制和位(wei)置狀(zhuang)態的(de)檢測。用(yong)(yong)于控(kong)(kong)制機械設備的(de)行程及限(xian)位(wei)保(bao)護。構造：由操作頭(tou)、觸點系(xi)統和外(wai)殼組成。

限(xian)位(wei)(wei)開關廣(guang)泛用于各類機(ji)床和起重機(ji)械(xie)，用以控(kong)(kong)制(zhi)其(qi)行(xing)程、進(jin)行(xing)終端限(xian)位(wei)(wei)保護(hu)。在電梯的控(kong)(kong)制(zhi)電路(lu)中，還(huan)利用行(xing)程限(xian)位(wei)(wei)開關來(lai)控(kong)(kong)制(zhi)開關轎(jiao)門的速度、自動開關門的限(xian)位(wei)(wei)，轎(jiao)廂的上、下限(xian)位(wei)(wei)保護(hu)。

在洗(xi)衣機的(de)脫(tuo)水（甩干）過程中轉速很高，如果此(ci)時有人(ren)(ren)由于疏忽打(da)開(kai)洗(xi)衣機的(de)門(men)或(huo)蓋后，南(nan)通斷(duan)(duan)火(huo)開(kai)關，再把手伸進去，很容(rong)易對人(ren)(ren)造成傷(shang)害，為(wei)了(le)避免這種事故的(de)發生，斷(duan)(duan)火(huo)開(kai)關廠家(jia)，在洗(xi)衣機的(de)門(men)或(huo)蓋上裝了(le)個(ge)電(dian)接點，一旦有人(ren)(ren)開(kai)啟洗(xi)衣機的(de)門(men)或(huo)蓋時，就(jiu)(jiu)自動(dong)把電(dian)機斷(duan)(duan)電(dian)，甚至還要靠機械(xie)辦(ban)法聯動(dong)，斷(duan)(duan)火(huo)開(kai)關哪家(jia)好(hao)，使門(men)或(huo)蓋一打(da)開(kai)就(jiu)(jiu)立刻“剎(cha)車”，強迫轉動(dong)著的(de)部件停下(xia)來(lai)，免得(de)傷(shang)害人(ren)(ren)身(shen)。

限(xian)位(wei)開(kai)關又稱行(xing)程(cheng)(cheng)(cheng)限(xian)位(wei)開(kai)關，用(yong)于控制機械設備的行(xing)程(cheng)(cheng)(cheng)及(ji)限(xian)位(wei)保護。在實際(ji)生(sheng)產(chan)中，將行(xing)程(cheng)(cheng)(cheng)限(xian)位(wei)開(kai)關安裝在預先(xian)安排的位(wei)置，當裝于生(sheng)產(chan)機械運(yun)動部件(jian)上的模(mo)塊撞(zhuang)擊行(xing)程(cheng)(cheng)(cheng)開(kai)關時，行(xing)程(cheng)(cheng)(cheng)限(xian)位(wei)開(kai)關的觸(chu)點動作，實現電路的切換(huan)