电压互感器的主要类型
⑴按安装地点可分为户内(nei)式和户外式。35kV及以(yi)下多制成(cheng)户内(nei)式;35kV以(yi)上则制成(cheng)户外式。
⑵按相(xiang)(xiang)数可分为(wei)单(dan)相(xiang)(xiang)和(he)三(san)相(xiang)(xiang)式,35kV及以上不能(neng)制成(cheng)三(san)相(xiang)(xiang)式。
⑶按(an)绕(rao)组(zu)数(shu)目可(ke)分(fen)为双绕(rao)组(zu)和(he)三(san)绕(rao)组(zu)电压互感器(qi)(qi),三(san)绕(rao)组(zu)电压互感器(qi)(qi)除一次侧和(he)基本二次侧外,还(hai)有一组(zu)辅助(zhu)二次侧,供接地保(bao)护用。
⑷按(an)绝缘(yuan)(yuan)方式(shi)(shi)(shi)(shi)可(ke)分为(wei)干式(shi)(shi)(shi)(shi)、浇(jiao)注式(shi)(shi)(shi)(shi)、油(you)浸(jin)式(shi)(shi)(shi)(shi)和充气式(shi)(shi)(shi)(shi)。干式(shi)(shi)(shi)(shi)电(dian)(dian)压(ya)互(hu)感器(qi)(qi)结构(gou)简单、无着火和爆炸(zha)危险,但绝缘(yuan)(yuan)强度较(jiao)(jiao)低,只(zhi)适用于6kV以下的户内式(shi)(shi)(shi)(shi)装(zhuang)置;浇(jiao)注式(shi)(shi)(shi)(shi)电(dian)(dian)压(ya)互(hu)感器(qi)(qi)结构(gou)紧凑、维护方便,适用于3kV~35kV户内式(shi)(shi)(shi)(shi)配电(dian)(dian)装(zhuang)置;油(you)浸(jin)式(shi)(shi)(shi)(shi)电(dian)(dian)压(ya)互(hu)感器(qi)(qi)绝缘(yuan)(yuan)性能较(jiao)(jiao)好,可(ke)用于10kV以上(shang)的户外(wai)式(shi)(shi)(shi)(shi)配电(dian)(dian)装(zhuang)置;充气式(shi)(shi)(shi)(shi)电(dian)(dian)压(ya)互(hu)感器(qi)(qi)用于SF6全(quan)封闭电(dian)(dian)器(qi)(qi)中。
⑸按工作原理划(hua)分,还可分为电(dian)磁式电(dian)压(ya)互(hu)感器,电(dian)容(rong)式电(dian)压(ya)互(hu)感器和电(dian)子式电(dian)压(ya)互(hu)感器。
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