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对于在具有高电阻率土壤地区使用电气装置的一些企业,使接地装置的流散电阻(接地电阻)值符合定额标准的这一问题是至关重要的。根据电气装置的安装和使用规程,当土壤的电阻率ρ大于500Ω·m 时,这样的土壤就应属于高电阻率的土壤。同时,规程还规定,在这样条件下,可使接地装置的接地电阻值增大0.002ρ倍,但不能大于10倍。在任何情况下,接地电阻值不得大于40Ω。在某一个矿山企业条件下,对土壤的电阻率、人工接地体和天然接地体的电阻、单相接地电流、供电网路的电容以及单相接地
For some companies that use electrical devices in areas with high resistivity of the soil, it is crucial that the grounding device’s dispersion resistance (ground resistance) value be in compliance with the quota standard. According to the electrical installation and use of rules, when the soil resistivity ρ greater than 500Ω · m, such a soil should belong to high-resistivity soil. At the same time, the rules also stipulate that in such conditions, the ground resistance of the grounding device can be increased by 0.002 ρ times, but not greater than 10 times. In any case, the grounding resistance must not exceed 40Ω. In a mining enterprise under the conditions of the soil resistivity, artificial grounding and natural grounding resistance, single-phase ground current, the power supply network capacitance and single-phase ground