直流电压试验作为一种对油浸纸绝缘电缆非常有效的方法应用至今，但它对塑料绝缘电缆是无效而且有害的。
The DC test, which is an effective means for the diagnostics of oil impregnated paper insulated cable, is still used even now, but it is ineffective and harmful for the plastic insulated cable.
笔者以充油电缆绝缘结构为研究对象，采用红外光谱分析技术对不同热老化阶段的电缆油油样进行了理化分析。
In this paper, the high voltage oil-filled cable insulating structure is investigated, and the infrared spectral analysis is used to analyze the cable oil samples in different thermal aging stages.
无需在安装现场再次打开电缆仓，从而减少了很多气体和绝缘油处理工作。
There is mo no need to re-open the cable, reducing much work for dealing.
无需在安装现场再次打开电缆仓，从而减少了很多气体和绝缘油处理工作。
There is mo no need to re-open the cable, reducing much work for dealing.
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