防爆變頻電機作為近幾年設備防爆領域的“新寵”，擁有變頻調速的特點在很多設備的使用當中可以達到增大扭矩，恒功率或恒扭矩更廣泛的適用在大型制造設備上使用.
 

  但是提醒(xing)，防(fang)爆(bao)變(bian)頻電(dian)機有時會(hui)因為變(bian)頻器設置不正確而燒毀。

  可能是(shi)因(yin)為(wei)變(bian)頻(pin)器(qi)(qi)保(bao)(bao)護(hu)功(gong)能沒有(you)(you)設(she)(she)置(zhi)(zhi)(zhi)。必須將電(dian)(dian)(dian)機(ji)(ji)的(de)一些參數(shu)輸入到(dao)變(bian)頻(pin)器(qi)(qi)內，同時對變(bian)頻(pin)器(qi)(qi)保(bao)(bao)護(hu)電(dian)(dian)(dian)動機(ji)(ji)的(de)相關參數(shu)進(jin)行設(she)(she)置(zhi)(zhi)(zhi)。而有(you)(you)的(de)客(ke)戶按變(bian)頻(pin)電(dian)(dian)(dian)機(ji)(ji)功(gong)率(lv)購買了變(bian)頻(pin)器(qi)(qi)，不(bu)經設(she)(she)置(zhi)(zhi)(zhi)直(zhi)接把變(bian)頻(pin)器(qi)(qi)與(yu)變(bian)頻(pin)電(dian)(dian)(dian)機(ji)(ji)連接在一起(qi)(qi)運轉。由于沒有(you)(you)針對電(dian)(dian)(dian)機(ji)(ji)設(she)(she)置(zhi)(zhi)(zhi)參數(shu)及保(bao)(bao)護(hu)，默認保(bao)(bao)護(hu)電(dian)(dian)(dian)流(liu)(liu)超過電(dian)(dian)(dian)機(ji)(ji)額定電(dian)(dian)(dian)流(liu)(liu)，過載引起(qi)(qi)的(de)過電(dian)(dian)(dian)流(liu)(liu)，不(bu)會停(ting)機(ji)(ji)保(bao)(bao)護(hu)電(dian)(dian)(dian)機(ji)(ji)，就會引起(qi)(qi)防爆(bao)變(bian)頻(pin)電(dian)(dian)(dian)機(ji)(ji)的(de)燒毀。

  一 . 保(bao)(bao)護(hu)動(dong)作(zuo)與(yu)電(dian)動(dong)機(ji)類型(xing)的設(she)定(ding)：一臺變頻器(qi)只控(kong)制(zhi)一臺電(dian)動(dong)機(ji)時(shi)，應(ying)設(she)定(ding)過載保(bao)(bao)護(hu)動(dong)作(zuo)有效；如果一臺變頻器(qi)控(kong)制(zhi)多臺電(dian)動(dong)機(ji)時(shi)，應(ying)設(she)定(ding)變頻器(qi)過載保(bao)(bao)護(hu)無(wu)效，這時(shi)應(ying)根據每(mei)臺電(dian)動(dong)機(ji)的容(rong)量各自采取熱繼電(dian)器(qi)保(bao)(bao)護(hu)或者電(dian)動(dong)機(ji)保(bao)(bao)護(hu)器(qi)保(bao)(bao)護(hu)等措施。 

  二．保(bao)護(hu)(hu)方(fang)式的設定：過載時可供選擇的保(bao)護(hu)(hu)方(fang)式有：(1)電(dian)動(dong)機(ji)減(jian)速停機(ji)：(2)電(dian)動(dong)機(ji)立即斷電(dian)自由(you)停機(ji)；(3)電(dian)動(dong)機(ji)限(xian)流運行(xing)。

  三(san)．過(guo)載(zai)保(bao)(bao)護延遲時間(jian)：過(guo)載(zai)電(dian)流達到保(bao)(bao)護定值時允許繼(ji)續運(yun)行的時間(jian)，超(chao)過(guo)則實施保(bao)(bao)護：延遲時間(jian)內電(dian)流值恢(hui)復正常值則退出保(bao)(bao)護；過(guo)載(zai)電(dian)流超(chao)過(guo)保(bao)(bao)護定值時按反時限(xian)特性實施保(bao)(bao)護。