Prediction of Insulation Resistance of Mining Electrical Equipment as a Method of Increasing its Safe Operation

Ensuring the safe operation of electrical equipment in networks with isolated neutral during underground mining of coal mines achieved by the use of protection devices against leakage currents in underground power supply systems. Leakage protection devices (relays) monitor the insulation resistance of the mine electrical networks and initiate a fairly quick disconnection of the power receivers or part of the network from the voltage source when a person touches one phase, an electric network element or an electrical installation case, if this happened due to mechanical damage or a decrease in the resistance level isolation below the critical (set) value.