[单选题]现场判断XLPE电缆绝缘老化程度时,通常以( )作为首选指标。(每题0.5 分)(0.5)
发布时间:2025-11-29
A.泄漏电流
B.机械拉伸强度
C.介质损耗角正切值(tanδ)
D.颜色变化
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