...高接地电阻; 无损检测[gap=631]Key words: concrete covering-layer; low frequency microsounding; high earth-Connection re-sistance; non-damage measurement...
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并且根据接地电阻的大小选择不同的暂态能量算式，故可判断金属性接地故障和高接地电阻接地故障。
Zero-sequence transient energy is calculated for low earthing resistance and single-phase transient energy for high earthing resistance.
在高电阻率地域，将接地电阻降到设计值非常困难。
In the high resistivity area, it is very difficult to reduce the earthing resistance to the given value.
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