防爆風機-防爆電機等級分別為BT4與CT4
CT4防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)是對防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)防(fang)(fang)(fang)護類(lei)型(xing)等(deng)(deng)級的(de)一(yi)(yi)個稱呼(hu),防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)型(xing)號一(yi)(yi)般是指YBX3防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)、YBK2防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)、TYBPE防(fang)(fang)(fang)爆(bao)永磁同(tong)步電(dian)(dian)機(ji)等(deng)(deng)類(lei)似的(de)型(xing)號。那么我們常說的(de)CT4防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)和(he)BT4防(fang)(fang)(fang)爆(bao)電(dian)(dian)機(ji)有什么區別呢(ni)?接下來(lai)就為大家講解:
CT4防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)機(ji)的(de)防(fang)(fang)爆(bao)等(deng)級(ji)是ExdIICT4,使用(yong)(yong)場所(suo)一般用(yong)(yong)于(yu)工廠,溫度可(ke)以在135℃左右的(de)高(gao)溫中運行,屬于(yu)耐(nai)高(gao)溫防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)機(ji)、注:CT4防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)機(ji)的(de)C就是廠用(yong)(yong)的(de)意思(si),T4就是防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)機(ji)可(ke)以承受高(gao)溫的(de)溫度組別,下面我們會有講解(jie)。BT4防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)機(ji)的(de)防(fang)(fang)爆(bao)等(deng)級(ji)為ExdIIBT4,防(fang)(fang)護等(deng)級(ji)低于(yu)CT4防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)機(ji),所(suo)以使用(yong)(yong)ⅡC可(ke)適用(yong)(yong)于(yu)ⅡA、ⅡB的(de)使用(yong)(yong)條件。
防(fang)爆(bao)(bao)電(dian)機(ji)可以分(fen)為I類(lei)(lei)和II類(lei)(lei)兩種類(lei)(lei)型,I類(lei)(lei)適用于(yu)(yu)煤(mei)礦(kuang)井下運作電(dian)機(ji)設(she)(she)備(bei)的,II類(lei)(lei)是(shi)用于(yu)(yu)工廠防(fang)爆(bao)(bao)電(dian)機(ji)設(she)(she)備(bei),I類(lei)(lei)防(fang)爆(bao)(bao)電(dian)氣(qi)設(she)(she)備(bei)是(shi)專門使用在煤(mei)礦(kuang)井下作業(ye),而煤(mei)礦(kuang)井下的氣(qi)體(ti)甲(jia)烷,所以I類(lei)(lei)電(dian)氣(qi)設(she)(she)備(bei)不再分(fen)級。II類(lei)(lei)防(fang)爆(bao)(bao)電(dian)機(ji)設(she)(she)備(bei),按其適用于(yu)(yu)氣(qi)體(ti)混合物(wu)大安全間隙或小點燃電(dian)流(liu)比分(fen)為A、B、C三級(即IIA、IIB、IIC)。
CT4防爆電機和BT4防爆電機表面溫度等級從低到高的順序是:T1(450℃)、T2(300℃)、T3(200℃)、T4(135℃)、T5(100℃)、T6(85℃)
由此可以看出,CT4防爆電機的等級比BT4的等級高,CT可用的范圍是廣的,CT是乙炔、氫氣級別的防爆等級,若環境里有乙炔、氫氣這些氣體,要用CT級別的防爆電機。而BT不能用于乙炔氣體的運作場所,只是中等級別的防爆定義。