Parameters of Insulation Relative to the Ground in Quarry Distribution Networks of Mining Enterprises in the Republic of Tajikistan

The article discusses a brief description of the mining enterprises of the Republic of Tajikistan, the insulation level of 6 kV quarry distribution networks. The parameters of network insulation relative to the ground are indicated as determined on the basis of the methods developed at the Department of Life Safety, South Ural State University. The performed calculations of insulation relative to the ground in quarry electrical distribution networks of mining enterprises in the Republic of Tajikistan showed that the value of the capacitive currents of a single-phase earth fault lies in the 0.1–0.37 A range and depends on the level of development of the enterprise. Considering the change in the network quiescence coefficient, the active insulation resistances of the network phases relative to the ground are in the 18–112 kΩ range. The network capacity relative to the ground is in the 0.09–0.34 µF range. The data obtained is necessary for selecting a security tool and evaluating the level of security.