电压互感器的主要类型
⑴按(an)安(an)装地点可分为户(hu)(hu)(hu)内(nei)(nei)式和户(hu)(hu)(hu)外式。35kV及以下多制成户(hu)(hu)(hu)内(nei)(nei)式;35kV以上则制成户(hu)(hu)(hu)外式。
⑵按相(xiang)数(shu)可(ke)分(fen)为单(dan)相(xiang)和三相(xiang)式,35kV及以上(shang)不能制成三相(xiang)式。
⑶按绕(rao)组数目可(ke)分为双绕(rao)组和三绕(rao)组电压互(hu)(hu)感器(qi),三绕(rao)组电压互(hu)(hu)感器(qi)除一(yi)次侧(ce)和基(ji)本二次侧(ce)外,还(hai)有(you)一(yi)组辅助(zhu)二次侧(ce),供接地保护用。
⑷按(an)绝(jue)缘方式(shi)(shi)(shi)(shi)(shi)可分为干(gan)(gan)式(shi)(shi)(shi)(shi)(shi)、浇注(zhu)式(shi)(shi)(shi)(shi)(shi)、油浸式(shi)(shi)(shi)(shi)(shi)和充(chong)气(qi)式(shi)(shi)(shi)(shi)(shi)。干(gan)(gan)式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压互(hu)感器结(jie)构(gou)简单(dan)、无着火和爆炸危险,但绝(jue)缘强度较低,只适用于6kV以下的户内式(shi)(shi)(shi)(shi)(shi)装置(zhi);浇注(zhu)式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压互(hu)感器结(jie)构(gou)紧(jin)凑、维护方便,适用于3kV~35kV户内式(shi)(shi)(shi)(shi)(shi)配电(dian)(dian)(dian)装置(zhi);油浸式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压互(hu)感器绝(jue)缘性能较好,可用于10kV以上的户外式(shi)(shi)(shi)(shi)(shi)配电(dian)(dian)(dian)装置(zhi);充(chong)气(qi)式(shi)(shi)(shi)(shi)(shi)电(dian)(dian)(dian)压互(hu)感器用于SF6全封闭电(dian)(dian)(dian)器中。
⑸按(an)工作原理划分(fen),还(hai)可分(fen)为电(dian)(dian)磁式(shi)(shi)电(dian)(dian)压(ya)互(hu)感(gan)(gan)器(qi),电(dian)(dian)容式(shi)(shi)电(dian)(dian)压(ya)互(hu)感(gan)(gan)器(qi)和电(dian)(dian)子式(shi)(shi)电(dian)(dian)压(ya)互(hu)感(gan)(gan)器(qi)。
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