在我(wo)們接觸電(dian)時，如何分辨出來高低(di)壓(ya)(ya)，電(dian)壓(ya)(ya)，也稱作(zuo)電(dian)勢差(cha)(cha)或電(dian)位(wei)差(cha)(cha)，是衡量(liang)單位(wei)電(dian)荷在靜電(dian)場(chang)中由于電(dian)勢不同所(suo)產生(sheng)的能量(liang)差(cha)(cha)的物理量(liang)。“電(dian)壓(ya)(ya)”一(yi)詞一(yi)般只(zhi)用于電(dian)路當(dang)(dang)中，“電(dian)勢差(cha)(cha)”和“電(dian)位(wei)差(cha)(cha)”則普遍應用于一(yi)切電(dian)現(xian)象當(dang)(dang)中。

    在我國電(dian)(dian)(dian)力系統中(zhong)，把標(biao)稱(cheng)電(dian)(dian)(dian)壓(ya)(ya)(ya)1kV及以(yi)(yi)下的(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)定義(yi)為低壓(ya)(ya)(ya)，把標(biao)稱(cheng)電(dian)(dian)(dian)壓(ya)(ya)(ya)1kV以(yi)(yi)上、330kV以(yi)(yi)下的(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)定義(yi)為高(gao)(gao)壓(ya)(ya)(ya)，把標(biao)稱(cheng)電(dian)(dian)(dian)壓(ya)(ya)(ya)330 kV及以(yi)(yi)上、1000 kV以(yi)(yi)下的(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)定義(yi)為超高(gao)(gao)壓(ya)(ya)(ya)，把標(biao)稱(cheng)電(dian)(dian)(dian)壓(ya)(ya)(ya)1000 kV及以(yi)(yi)上的(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)定義(yi)為特(te)高(gao)(gao)壓(ya)(ya)(ya)，把標(biao)稱(cheng)電(dian)(dian)(dian)壓(ya)(ya)(ya)±800 kV以(yi)(yi)下的(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)定義(yi)為高(gao)(gao)壓(ya)(ya)(ya)直(zhi)流(liu)(liu)，把標(biao)稱(cheng)電(dian)(dian)(dian)壓(ya)(ya)(ya)±800 kV及以(yi)(yi)上的(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)定義(yi)為特(te)高(gao)(gao)壓(ya)(ya)(ya)直(zhi)流(liu)(liu)。把1 kV 以(yi)(yi)上至(zhi)20 kV 的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)稱(cheng)為中(zhong)壓(ya)(ya)(ya)。而美(mei)國電(dian)(dian)(dian)氣和電(dian)(dian)(dian)子工程師協會（IEEE）的(de)標(biao)準文件中(zhong)把2.4 kV至(zhi)69 kV的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)等(deng)級(ji)稱(cheng)為中(zhong)壓(ya)(ya)(ya)。

    在(zai)一(yi)定標準內人接(jie)觸電(dian)(dian)壓的值超(chao)過(guo)36伏就會有電(dian)(dian)擊(ji)的感覺生命安全就會受到威脅。還有我們(men)可(ke)以用計量儀(yi)器來測量看看，

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