Frequent operational switching in quarry distribution networks with voltage 6-10 kV change their parameters in a wide range. This causes possible changes in the magnitudes of earth fault currents for individual feeders and for the whole substation, as a whole ...

Power System Modeling. Correct and reliable construction of power supply system and distribution of electric energy, research of modes of these systems as a whole and individual elements in particular, simplification of calculations and selection of optimal parameters can be achieved by physical modeling ...

Single-phase ground faults in quarry distribution networks can occur as a result of: 1) human contact directly with live or metal structural parts suddenly energized due to insulation breakdown; 2) mechanical or any other damage to overhead or cable power lines ...