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    一般情況下熱繼電器整定電流等于電動機額定電流，或略小一點點，如果想提高動作靈敏度，可在大于電機的實際負載運行電流與電機額定電流之間，保護電機，你選的過載繼電器電流范圍有點大，不起作用。實際電流等于整定電流熱過載繼電器是不動作的。
    熱(re)繼電(dian)(dian)(dian)(dian)器(qi)(qi)得(de)鎮定電(dian)(dian)(dian)(dian)流是電(dian)(dian)(dian)(dian)動機(ji)額定電(dian)(dian)(dian)(dian)流1.1-1.2倍為(wei)宜(yi)，因為(wei)電(dian)(dian)(dian)(dian)機(ji)啟動時(shi)(shi)雖然(ran)電(dian)(dian)(dian)(dian)流是運行時(shi)(shi)的(de)3-7倍但時(shi)(shi)間短一(yi)般(ban)幾秒到十(shi)幾秒熱(re)繼電(dian)(dian)(dian)(dian)器(qi)(qi)不會動作，缺相和過流以(yi)后電(dian)(dian)(dian)(dian)流增大繼電(dian)(dian)(dian)(dian)器(qi)(qi)熱(re)原件動作其常閉副助觸(chu)點(dian)打開切斷接觸(chu)器(qi)(qi)控制回(hui)路(lu)，切斷電(dian)(dian)(dian)(dian)機(ji)電(dian)(dian)(dian)(dian)源(yuan)！真(zhen)確調整(zheng)熱(re)繼電(dian)(dian)(dian)(dian)器(qi)(qi)鎮定電(dian)(dian)(dian)(dian)流！

電線快速接頭

浮球液位控制器

防雷浪涌保護器

墻壁開槽機

漏電測試儀

開槽機

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　　交流接(jie)觸器(qi)主(zhu)(zhu)要(yao)由四部(bu)分組(zu)成(cheng):(1) 電磁系統,包(bao)括吸引線(xian)圈(quan)、動(dong)鐵芯和靜鐵芯；(2)觸頭系統,包(bao)括三組(zu)主(zhu)(zhu)觸頭和一至(zhi)兩組(zu)常開、常閉輔助觸頭,它和動(dong)鐵芯是連在一起(qi)互相(xiang)聯動(dong)的；(3)滅弧裝(zhuang)置(zhi),一般(ban)容(rong)量(liang)較大(da)的交流接(jie)觸器(qi)都設有滅弧裝(zhuang)置(zhi),以便迅速切斷電弧,免(mian)于燒壞主(zhu)(zhu)觸頭；(4)絕緣外殼及附件,各種彈(dan)簧、傳動(dong)機(ji)構、短路環、接(jie)線(xian)柱(zhu)等。

　　熱過載繼電器：當(dang)它接入主電(dian)路內，流(liu)過(guo)與電(dian)動機相(xiang)同電(dian)流(liu)，當(dang)電(dian)動機過(guo)載達到一定程(cheng)度時，熱(re)元件被加熱(re)達到一定彎曲程(cheng)度，推動熱(re)繼電(dian)器動作結構。

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