交流电压下,输电线路外绝缘击穿多发生在正半波,原因是( )。(0.5)
发布时间:2025-11-26
A.正半波电压幅值高
B.正半波时表面电场畸变更严重
C.负半波时介质损耗小
D.负半波时电荷易消散
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