Kovalyova I. Engine electrotechnical complex of mine with function of two-end power supply disconnection at emergency condition

Object - engine electrotechnical complex of mine. The purpose - reduce the time of power supply disconnection engine electrotechnical complex of mine and reducing amount of electricity within the earth-leakage circuit at emergency condition based on the scientific justification of parameters and structure of independent means of safety disconnection the back-to-network power generation produced by induction motors. Methods - theoretical (theory of transients in alternating current electrical machines, space vector method) and experimental (measuring of transient parameters in laboratory, using modern methods of electrical measurements; processing was carried out by means of probability theory methods and the mathematical statistics). Novelty consists in further development of protective methods of engine electrotechnical complex of mine. Results -the task of reduce the time of power supply disconnection engine electrotechnical complex of mine and reducing amount of electricity within the earth-leakage circuit at emergency condition, was solved, which is essential for improving safe operation of electrical mining. Industry is coal mines of Ukraine.