METHOD OF PROTECTION OF THREE-PHASE MOTOR AGAINST PHASE- TO-PHASE AND TURN-TO-TURN SHORT-CIRCUITS IN WINDING OF STATOR

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to electrical engineering, in particular to the relay protection. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - raising u0431u044bu0441u0442u0440u043eu0434u0435u0439u0441u0442u0432u0438u00a0 protection by u043du0435u0447u0443u0432u0441u0442u0432u0438u0442u0435u043bu044cu043du043eu0441u0442u0438 to the asymmetry of the host u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 and external short u0437u0430u043cu044bu043au0430u043du0438u00a0u043c. u043du0430u043fu0440u00a0u0436u0435u043du0438u0435 u0441u043du0438u043cu0430u0435u0442u0441u00a0 with u043du0435u0439u0442u0440u0430u043bu0438 u0434u0432u0438u0433u0430u0442u0435u043bu00a0 u043fu043eu0434u0430u0435u0442u0441u00a0 through measuring transducers 3 and 4 to 6 to the blocks 7 and 8 u0432u044bu0434u0435u043bu0435u043du0438u00a0 largest and smallest values in the nap u0440u00a0u0436u0435u043du0438u0439.on 9 u0432u044bu0434u0435u043bu00a0u0435u0442u0441u00a0 difference of these u043du0430u043fu0440u00a0u0436u0435u043du0438u0439 and u043fu043eu0434u0430u0435u0442u0441u00a0 to block 10 u0441u0440u0430u0432u043du0435u043du0438u00a0 is compared with a preset value. in a normal operating mode or in the asymmetry of the host u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 or external short u0437u0430u043cu044bu043au0430u043du0438u00a0 u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0 between u043du0435u0439u0442u0440u0430u043bu00a0u043cu0438 u0440u0430u0441u0449u0435u043fu043bu0435u043du043du044bu0445 windings very significant and u043eu043fu0440u0435u0434u0435u043bu00a0u0435u0442u0441u00a0 only inaccurate u0438u0437u0433u043eu0442u043eu0432u043bu0435u043du0438u00a0 phases u0434u0432u0438u0433u0430u0442u0435u043bu00a0.the difference of these u043du0430u043fu0440u00a0u0436u0435u043du0438u0439 isn't enough u0434u043bu00a0 u043fu043eu00a0u0432u043bu0435u043du0438u00a0 output signal u0441u0440u0430u0432u043du0435u043du0438u00a0 block 10. if the damage occurred (u0432u0438u0442u043au043eu0432u043eu0435 or skewed: k.z.), between u043du0435u0439u0442u0440u0430u043bu00a0u043cu0438 a multiple winding u043fu043eu00a0u0432u043bu00a0u044eu0442u0441u00a0 u043du0430u043fu0440u00a0u0436u0435u043du0438u00a0, if the difference between the highest and lowest u0437u043du0430u0447u0435u043du0438u00a0u043cu0438 them is u0434u043bu00a0 u0441u0440u0430u0431u0430u0442u044bu0432u0430u043du0438u00a0 block 10 u043fu043eu00a0u0432u043bu00a0u0435u0442u0441u00a0, its output signal, the u0434u0432u0438u0433u0430u0442u0435u043bu00a0 to disconnect from the network. 1 il.