DEVICE FOR DIRECTIONAL PROTECTION AGAINST ONE-PHASE SHORT- CIRCUIT TO GROUND IN THREE-PHASE NETWORK WITH INSULATED NEUTRAL

摘要

use: electrical engineering u0434u043bu00a0 protection of single-phase circuits on the ground in the three-phase power network with isolated neutral. the essence of the u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0: in the event of a network u043eu0434u043du043eu0444u0430u0437u043du043eu0433u043e u0437u0430u043cu044bu043au0430u043du0438u00a0 land u0437u0430u0440u00a0u0434u044b accumulated in the rings, cylinders 7, 9 in a normal mode, a transitional current leakage u043fu0440u043eu0445u043eu0434u00a0u0449u0438u0439 on u0440u0435u0437u0438u0441u0442u043eu0440u0443 11.under the influence of electric leakage u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 at the resistor 11 and the zero sequence current transformer 15 u0444u0430u0437u043eu0441u0440u0430u0432u043du0438u0432u0430u044eu0449u0438u0439 element 17 u0441u0440u0430u0431u0430u0442u044b in u0437u0430u043cu044bu043au0430u043du0438u0438 to earth in the protected area and works with the u0437u0430u043cu044bu043au0430u043du0438u00a0u0445 land outside the protected area network. 2). (i