电压互感器的主要类型
⑴按(an)安装地(di)点(dian)可分为户(hu)(hu)内(nei)式(shi)(shi)(shi)和户(hu)(hu)外式(shi)(shi)(shi)。35kV及(ji)以下多制成户(hu)(hu)内(nei)式(shi)(shi)(shi);35kV以上则制成户(hu)(hu)外式(shi)(shi)(shi)。
⑵按相(xiang)数可分(fen)为单相(xiang)和(he)三(san)(san)相(xiang)式(shi),35kV及以上不能制成三(san)(san)相(xiang)式(shi)。
⑶按绕组数目可分为双绕组和(he)三绕组电(dian)压(ya)互感(gan)器(qi),三绕组电(dian)压(ya)互感(gan)器(qi)除(chu)一(yi)次(ci)侧(ce)和(he)基(ji)本二次(ci)侧(ce)外(wai),还有一(yi)组辅助二次(ci)侧(ce),供接地保护用(yong)。
⑷按绝(jue)缘(yuan)(yuan)方式(shi)(shi)(shi)可分为干式(shi)(shi)(shi)、浇(jiao)注(zhu)式(shi)(shi)(shi)、油浸(jin)式(shi)(shi)(shi)和(he)充(chong)气式(shi)(shi)(shi)。干式(shi)(shi)(shi)电(dian)(dian)压互(hu)感器结构(gou)简单、无着火和(he)爆(bao)炸危险,但绝(jue)缘(yuan)(yuan)强度较低,只适用(yong)于(yu)6kV以下的户内(nei)式(shi)(shi)(shi)装(zhuang)置;浇(jiao)注(zhu)式(shi)(shi)(shi)电(dian)(dian)压互(hu)感器结构(gou)紧凑(cou)、维护(hu)方便,适用(yong)于(yu)3kV~35kV户内(nei)式(shi)(shi)(shi)配电(dian)(dian)装(zhuang)置;油浸(jin)式(shi)(shi)(shi)电(dian)(dian)压互(hu)感器绝(jue)缘(yuan)(yuan)性能(neng)较好,可用(yong)于(yu)10kV以上的户外式(shi)(shi)(shi)配电(dian)(dian)装(zhuang)置;充(chong)气式(shi)(shi)(shi)电(dian)(dian)压互(hu)感器用(yong)于(yu)SF6全封闭电(dian)(dian)器中。
⑸按(an)工作原(yuan)理划(hua)分,还可分为电磁式(shi)电压互(hu)感器(qi),电容式(shi)电压互(hu)感器(qi)和电子式(shi)电压互(hu)感器(qi)。
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