| 摘要 |
The invention relates to electric engineering and intended for enhancement of electrical safety of network systems operation, systems have insulated neutral of the transformer. The invention may be used mainly in mine district network systems. To realize the method, network is disconnected by means of a branch switch depending on source current with disconnection of all branches, which being commutated. When is realized protective connection, in moment of current failure in every branch, phases of such branching from side of the corresponding switching unit are connected one with another and connect to the ground circuit through a throttle. Due to autonomous subdivision of mine district network, after protective cutout of the network, separate branches and compensation of capacitive currents of source in the circuit of every consumer, it is provided reliability enhancement of branches disconnection that being commutate, and safety raising when protective disconnection is realized. |
