电压互感器的主要类型
⑴按安装地点可分为户(hu)内(nei)式(shi)和户(hu)外式(shi)。35kV及以(yi)下多制(zhi)成户(hu)内(nei)式(shi);35kV以(yi)上则制(zhi)成户(hu)外式(shi)。
⑵按(an)相(xiang)数可(ke)分(fen)为(wei)单(dan)相(xiang)和三相(xiang)式,35kV及以(yi)上不能制(zhi)成三相(xiang)式。
⑶按绕(rao)组(zu)(zu)数目可分为双绕(rao)组(zu)(zu)和三绕(rao)组(zu)(zu)电压互感器,三绕(rao)组(zu)(zu)电压互感器除一次(ci)侧(ce)和基本二(er)次(ci)侧(ce)外,还有一组(zu)(zu)辅助二(er)次(ci)侧(ce),供接地保护用(yong)。
⑷按(an)绝缘方(fang)式(shi)(shi)(shi)(shi)(shi)可(ke)分为(wei)干式(shi)(shi)(shi)(shi)(shi)、浇注式(shi)(shi)(shi)(shi)(shi)、油浸式(shi)(shi)(shi)(shi)(shi)和(he)充(chong)气式(shi)(shi)(shi)(shi)(shi)。干式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压(ya)(ya)互(hu)感器(qi)结构简单、无着火和(he)爆(bao)炸危险,但绝缘强度较(jiao)低(di),只适(shi)(shi)用于6kV以(yi)下(xia)的(de)户(hu)内(nei)式(shi)(shi)(shi)(shi)(shi)装置;浇注式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压(ya)(ya)互(hu)感器(qi)结构紧凑、维护方(fang)便,适(shi)(shi)用于3kV~35kV户(hu)内(nei)式(shi)(shi)(shi)(shi)(shi)配电(dian)(dian)(dian)装置;油浸式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压(ya)(ya)互(hu)感器(qi)绝缘性(xing)能较(jiao)好,可(ke)用于10kV以(yi)上的(de)户(hu)外式(shi)(shi)(shi)(shi)(shi)配电(dian)(dian)(dian)装置;充(chong)气式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压(ya)(ya)互(hu)感器(qi)用于SF6全封闭电(dian)(dian)(dian)器(qi)中。
⑸按(an)工作(zuo)原理划分,还可分为电(dian)磁(ci)式(shi)电(dian)压互感器(qi),电(dian)容式(shi)电(dian)压互感器(qi)和电(dian)子式(shi)电(dian)压互感器(qi)。
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