DEVICE FOR OPEN-PHASE PROTECTION OF INDUCTION 3-PHASE MOTOR

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to electrical engineering, in particular to the relay protection of electric motors. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improving the reliability of the device. in the cliff, one of the phases, for example, phase b, a fur coat u044du043bu0435u043au0442u0440u043eu0434u0432u0438u0433u0430u0442u0435u043bu00a0 1 connected to this phase, a voltage u0441u0430u043cu043eu0438u043du0434u0443u043au0446u0438u0438, u0432u044bu043fu0440u00a0u043cu043bu0435u043du043du044bu0439 current and u043du0430u043fu0440u00a0u0436u0435u043du0438u0435 on u0440u0435u0437u0438u0441u0442 auray 13 increases.thyristor 11 u043eu0442u043au0440u044bu0432u0430u0435u0442u0441u00a0 shock between through capacitor 18 and u0443u043fu0440u0430u0432u043bu00a0u044eu0449u0438u0439 electrode u0442u0438u0440u0438u0441u0442u043eu0440u0430 u0432u043au043bu044eu0447u0430u0435u0442u0441u00a0 relays 10, 11, u0440u0430u0437u043cu044bu043au0430u0435u0442 u0440u0430u0437u043cu044bu043au0430u044eu0449u0438u0439 contact 21 in the chain u043fu0438u0442u0430u043du0438 u00a0 u043au043eu043du0442u0430u043au0442u043eu0440u0430 coil 6, which u0440u0430u0437u043cu044bu043au0430u00a0 their power contacts 2, switches the electric motor 1. the relay 10, by involving themselves, u0443u0434u0435u0440u0436u0438u0432u0430u0435u0442u0441u00a0 mechanical lock. 1 il.