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DEVICE FOR PROTECTING AGAINST SIGNLE-PHASE GROUND FAULTS IN LOWER-VOLTAGE NETWORK WITH ISOLATED NEUTRAL
DEVICE FOR PROTECTING AGAINST SIGNLE-PHASE GROUND FAULTS IN LOWER-VOLTAGE NETWORK WITH ISOLATED NEUTRAL
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机译:用于隔离中性点的低压电网中的单相接地故障的保护装置
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the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to relay protection u044du043bu0435u043au0442u0440u043eu0441u043du0430u0431u0436u0435u043du0438u00a0 systems with isolated neutral and can be used u0434u043bu00a0 protection of single-phase circuits on the earth the longitudinal u044du043bu0435u043au0442u0440u043eu0441u043du0430u0431u0436u0435u043du0438u00a0 u043du0435u0442u00a0u0433u043eu0432u043eu0439 load rail.the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - prevention of false positives when single-phase earth u0437u0430u043cu044bu043au0430u043du0438u00a0u0445 higher u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 network with isolated neutral, located at on u0431u0449u0438u0445 support with u043bu0438u043du0438u00a0u043cu0438 lower u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 protected network.the device u0441u043eu0441u0442u043eu00a0u0449u0435u0435 from the measuring body 1 u043du0430u043fu0440u0430u0432u043bu0435u043du0438u00a0 power of zero sequence network of lower u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0, for example, 10 kv, and the measuring body 2 u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 zero sequence network of higher u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0, e.g. 35 kv, ban logical element 3, the element 4 and the executive u044du043bu0435u043cu0435 extracts time u043du0442u0430 5works with u0437u0430u043cu044bu043au0430u043du0438u00a0u0445 single-phase earth network of higher u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 u0431u043bu0430u0433u043eu0434u0430u0440u00a0, under the influence of the measuring body 2 u043du0430u043fu0440u00a0u0436u0435u043du0438u0435 zero after u0434u043eu0432u0430u0442u0435u043bu044cu043du043eu0441u0442u0438 works ban logic element 3, which prevents the separation of the extracts time 4 and the executive element 5 protection. 1 il.
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