電(dian)(dian)機(ji)(ji)被燒掉的(de)原(yuan)因，大多數是(shi)只使用單(dan)一的(de)空氣開關進(jin)行保護。當電(dian)(dian)機(ji)(ji)因為(wei)缺相、過載(zai)時，空氣開關不能及(ji)時跳閘，就會導致電(dian)(dian)機(ji)(ji)燒壞(huai)，怎么防止(zhi)三相電(dian)(dian)機(ji)(ji)燒機(ji)(ji)，下面就由(you)晟邦(bang)電(dian)(dian)機(ji)(ji)帶(dai)大家大具體來看下。

三相電機(ji)燒機(ji)問題(ti)的(de)防范措施常(chang)用(yong)于(yu)三相電機(ji)保(bao)護的(de)有熱繼(ji)電器(qi)、電動機(ji)綜合(he)保(bao)護器(qi)、變頻器(qi)，需要與(yu)空氣開關搭配使用(yong)。

1、熱繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)熱繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)常用(yong)于電(dian)(dian)(dian)(dian)(dian)機過(guo)載保護(hu)，熱繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)整(zheng)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)值(zhi)設定(ding)為電(dian)(dian)(dian)(dian)(dian)機額定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)1.1倍。當(dang)電(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)壓缺相或出(chu)現機械(xie)問(wen)題時，都可能(neng)引起電(dian)(dian)(dian)(dian)(dian)機過(guo)載，電(dian)(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)(dian)流(liu)過(guo)大，超過(guo)熱繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)整(zheng)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)值(zhi)，熱繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)金屬片受熱變形(xing)，斷開輔助觸(chu)(chu)點，讓接(jie)觸(chu)(chu)器(qi)(qi)的(de)(de)控制(zhi)電(dian)(dian)(dian)(dian)(dian)路斷電(dian)(dian)(dian)(dian)(dian)，進(jin)行保護(hu)。

2、電機(ji)(ji)(ji)(ji)綜(zong)合保(bao)護(hu)(hu)(hu)器(qi)電動(dong)機(ji)(ji)(ji)(ji)綜(zong)合保(bao)護(hu)(hu)(hu)器(qi)具有(you)缺(que)相、過載、三(san)相不(bu)(bu)平衡保(bao)護(hu)(hu)(hu)，使用時需(xu)要與接觸器(qi)啟、保(bao)、停(ting)電路(lu)搭配使用。電動(dong)機(ji)(ji)(ji)(ji)綜(zong)合保(bao)護(hu)(hu)(hu)器(qi)不(bu)(bu)適(shi)用于電機(ji)(ji)(ji)(ji)正反轉，容易引起誤動(dong)作，設(she)定(ding)電流(liu)為電機(ji)(ji)(ji)(ji)額(e)定(ding)電流(liu)的(de)(de)1.1倍。3、變(bian)(bian)頻(pin)(pin)(pin)器(qi)變(bian)(bian)頻(pin)(pin)(pin)器(qi)的(de)(de)功能是(shi)對(dui)(dui)電機(ji)(ji)(ji)(ji)進行(xing)變(bian)(bian)頻(pin)(pin)(pin)調速，但同時變(bian)(bian)頻(pin)(pin)(pin)器(qi)對(dui)(dui)電機(ji)(ji)(ji)(ji)的(de)(de)保(bao)護(hu)(hu)(hu)是(shi)最全面(mian)的(de)(de)，變(bian)(bian)頻(pin)(pin)(pin)器(qi)下(xia)的(de)(de)電機(ji)(ji)(ji)(ji)很少因故障(zhang)(zhang)而燒壞。變(bian)(bian)頻(pin)(pin)(pin)器(qi)不(bu)(bu)僅對(dui)(dui)電機(ji)(ji)(ji)(ji)有(you)缺(que)相、過載、短路(lu)保(bao)護(hu)(hu)(hu)，還會起到欠壓保(bao)護(hu)(hu)(hu)的(de)(de)作用。熱繼電器(qi)與電機(ji)(ji)(ji)(ji)綜(zong)合保(bao)護(hu)(hu)(hu)器(qi)進行(xing)保(bao)護(hu)(hu)(hu)時，都是(shi)斷(duan)開電機(ji)(ji)(ji)(ji)的(de)(de)控制(zhi)電路(lu)，在由(you)控制(zhi)電路(lu)斷(duan)開主電路(lu)。當電機(ji)(ji)(ji)(ji)發生故障(zhang)(zhang)變(bian)(bian)頻(pin)(pin)(pin)器(qi)進行(xing)保(bao)護(hu)(hu)(hu)時，直接切斷(duan)電機(ji)(ji)(ji)(ji)電源的(de)(de)輸出。