再根据系统确定的操作过电压倍数及电气绝缘强度（空气间隙）来确定在人不宜到达地方的交叉跨越距离；
We decide the cross and span clearance by over-voltage times and electrical insulation strength (air spacing) from the system major in places that the public not easy to arrive.
电气绝缘在高压电力设备中起着极其重要的作用，绝缘系统的状况直接决定着电力主设备运行的可靠性。
Electric insulation plays a very important role in high voltage electrical equipment. The insulation state directly determines the stability of electrical system.
电气绝缘在高压电力设备中起着极其重要的作用，绝缘系统的状况直接决定着电力主设备运行的可靠性。
Electric insulation plays a very important role in high voltage electrical equipment. The insulation state directly determines the stability of electrical system.
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