绝缘监视和漏电保护,是保证矿山开采企业电网运行安全的主要措施之一,其应用范围可推广到化学采矿工业中的高压电网,其采区网路电压预计提高到数千伏。研制这种监视装置的主要问题是确定测头的联接位置。因为设计分析表明,对于电网绝缘电阻R_и3而言,测头可与 A30—6及 УАКИ串联,也可与配电装置 РУ-660并联。我们从灵敏度的角度来比较一下图1_a 和图1_b 的系统。灵敏度的绝对值由流经测头的 Insulation monitoring and leakage protection are one of the main measures to ensure the safety of the mining enterprises in power grid operation. Its application scope can be extended to the high voltage grid in the chemical mining industry, and its network voltage in the mining area is expected to be raised to several thousand volts. The main problem in developing such a monitoring device is determining the position of the touch probe. Because the design analysis shows that for the grid insulation resistance R_и3, the probe can be connected in series with A30-6 and УАКИ, or in parallel with the distribution device РУ-660. We compare the systems of Figure 1a and Figure 1b from a sensitivity point of view. The absolute value of sensitivity is measured by the probe