Measure each phase metal mask, metal sleeve to ground insulation resistance.
测量每相金属屏蔽、金属套与大地之间的绝缘电阻。
Each alarm kit displays the phase to ground insulation through 15-20 branches of the network.
每台报警显示箱可反映15～20条电网支路的单相对地绝缘状态。
Each alarm kit displays the phase to ground insulation through 15-20 branches of the network.
每台报警显示箱可反映15～20条电网支路的单相对地绝缘状态。
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