本文在对国内外电力电缆护层测距仪的现状进行分析的基础上，设计了一种新型的电力电缆护层故障测试仪。
Based on the investigation of development state of the cable sheath fault location devices home and abroad, a new cable sheath fault testing device is designed in this thesis.
高压单芯电缆的接地系统一旦被破坏，在其电缆金属护层上会产生高值悬浮电压而引发严重后果。
Once the grounding system of HV single-core cable is broken, high floating voltage will appear on its metal sheath, thus causes serious consequence.
隔离绝缘层和外护层以及内衬层，以防它们之间相互粘结而影响电缆的机械、物理、电性能等。
To separate the insulation, sheath and inner covering, and keep them from bonding and affecting the mechanical, physical and electrical properties of the cable.
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