This paper analyzed the effect of shielding between hollow grounding devices and between hollow grounding device and ground grid.
并通过模拟试验分析了接地坑、自然水对降低空腹式接地装置的接地电阻的作用。
2
The metal shieldinggrid for avoiding the electromagnetic interference is designed.
防电磁干扰应安装金属网格屏蔽。
3
Even if we used grid electricity to cut off the permanent magnet's field by shielding it with something, wouldn't we save a lot more energy than using an electromagnet?