與保(bao)險絲其實都是(shi)(shi)(shi)(shi)作用都是(shi)(shi)(shi)(shi)一樣(yang)的，你這(zhe)個(ge)常燒(shao)電(dian)機(ji)(ji)不行，這(zhe)個(ge)是(shi)(shi)(shi)(shi)開關(guan)和熱(re)(re)(re)繼(ji)電(dian)器(qi)定值不對，如(ru)果定值對是(shi)(shi)(shi)(shi)不可能燒(shao)電(dian)機(ji)(ji)的。用電(dian)流(liu)表測好你用的那臺(tai)(tai)電(dian)機(ji)(ji)的運行電(dian)流(liu)，熱(re)(re)(re)繼(ji)電(dian)器(qi)定值為(wei)(wei)這(zhe)臺(tai)(tai)電(dian)機(ji)(ji)電(dian)流(liu)0.95－1.05倍，就(jiu)不會(hui)燒(shao)電(dian)機(ji)(ji)，開關(guan)也接這(zhe)個(ge)選作后備(bei)，如(ru)果這(zhe)臺(tai)(tai)熱(re)(re)(re)繼(ji)電(dian)器(qi)失(shi)靈了(le)，那么開關(guan)就(jiu)會(hui)跳閘。如(ru)5.5KW電(dian)機(ji)(ji)，額定電(dian)流(liu)為(wei)(wei)11A，那么熱(re)(re)(re)繼(ji)電(dian)器(qi)調整(zheng)**電(dian)流(liu)為(wei)(wei)11.55A。開關(guan)選25－32A定值為(wei)(wei)16A。b保(bao)護(hu)電(dian)動機(ji)(ji)的斷路器(qi)是(shi)(shi)(shi)(shi)設(she)備(bei)用斷路器(qi)，標準是(shi)(shi)(shi)(shi)GB17701，而(er)一般保(bao)護(hu)用的是(shi)(shi)(shi)(shi)接觸器(qi)與熱(re)(re)(re)繼(ji)電(dian)器(qi)的組(zu)合(he)。
按照一(yi)臺(tai)(tai)電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)額(e)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)整(zheng)定(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)(de)過(guo)負荷保護(hu)(hu)，如果(guo)(guo)多臺(tai)(tai)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)都接(jie)在(zai)一(yi)個斷(duan)路(lu)(lu)器(qi)(qi)上，這(zhe)(zhe)幾臺(tai)(tai)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)一(yi)起啟(qi)動時，其啟(qi)動電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)就(jiu)(jiu)大于一(yi)臺(tai)(tai)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)過(guo)負荷電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，就(jiu)(jiu)會將電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)正常啟(qi)動當(dang)做過(guo)負荷而切(qie)斷(duan)。所(suo)以不(bu)(bu)能用一(yi)臺(tai)(tai)斷(duan)路(lu)(lu)器(qi)(qi)保護(hu)(hu)多臺(tai)(tai)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)，起不(bu)(bu)到(dao)保護(hu)(hu)的(de)(de)(de)(de)(de)(de)(de)(de)作用。因為電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)斷(duan)路(lu)(lu)器(qi)(qi)一(yi)般(ban)都具(ju)有I2T延(yan)時跳斷(duan)功能，而配(pei)(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)型(xing)(xing)(xing)斷(duan)路(lu)(lu)器(qi)(qi)是(shi)(shi)沒(mei)有的(de)(de)(de)(de)(de)(de)(de)(de)，最直接(jie)的(de)(de)(de)(de)(de)(de)(de)(de)后(hou)果(guo)(guo)就(jiu)(jiu)是(shi)(shi)，你(ni)用同樣容量的(de)(de)(de)(de)(de)(de)(de)(de)配(pei)(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)型(xing)(xing)(xing)空開代替電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)保護(hu)(hu)型(xing)(xing)(xing)的(de)(de)(de)(de)(de)(de)(de)(de)，可能一(yi)開機(ji)(ji)就(jiu)(jiu)跳停(ting)了，它避不(bu)(bu)了電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)啟(qi)動時大電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)(de)(de)沖擊。不(bu)(bu)可以的(de)(de)(de)(de)(de)(de)(de)(de)，一(yi)般(ban)配(pei)(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)型(xing)(xing)(xing)斷(duan)路(lu)(lu)器(qi)(qi)其短(duan)路(lu)(lu)保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)設定(ding)(ding)10倍(bei)額(e)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)及以下，而電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)（馬(ma)(ma)達(da)）其起動電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)就(jiu)(jiu)達(da)到(dao)10額(e)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)或者更高，所(suo)以電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)保護(hu)(hu)斷(duan)路(lu)(lu)器(qi)(qi)一(yi)般(ban)出廠時短(duan)路(lu)(lu)保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)都是(shi)(shi)設定(ding)(ding)12倍(bei)額(e)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，如果(guo)(guo)你(ni)現在(zai)采(cai)用配(pei)(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)用斷(duan)路(lu)(lu)器(qi)(qi)，你(ni)的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)是(shi)(shi)開不(bu)(bu)起來的(de)(de)(de)(de)(de)(de)(de)(de)所(suo)謂的(de)(de)(de)(de)(de)(de)(de)(de)配(pei)(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)型(xing)(xing)(xing)的(de)(de)(de)(de)(de)(de)(de)(de)一(yi)般(ban)沒(mei)有熱過(guo)載(zai)保護(hu)(hu)功能。有這(zhe)(zhe)個功能的(de)(de)(de)(de)(de)(de)(de)(de)，價格比馬(ma)(ma)達(da)開關(guan)貴(gui)無(wu)數倍(bei)。 （馬(ma)(ma)達(da)開關(guan)是(shi)(shi)一(yi)種(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)啟(qi)動裝置，并(bing)不(bu)(bu)是(shi)(shi)普通的(de)(de)(de)(de)(de)(de)(de)(de)含有電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)保護(hu)(hu)功能的(de)(de)(de)(de)(de)(de)(de)(de)塑殼斷(duan)路(lu)(lu)器(qi)(qi)）