发明名称 |
DEVICE FOR FAST-RESPONSE PROTECTION OF THREE-PHASE INDUCTION MOTORS AGAINST PHASE FAILURE IN SUPPLY MAINS |
摘要 |
FIELD: power supplies; relay protective gear for three-phase induction motors of hoisting and hauling mechanisms. SUBSTANCE: device functions to compare motor currents shifted in phase through angle 2pi/3 under normal conditions and through angle pi in case of phase failure in supply mains, and also to compare interphase voltages across motor terminals shifted in phase through angle 2pi/3 under normal conditions and in case of phase failure and through angle approaching pi in case of external interphase short circuits. EFFECT: improved reliability and speed of response. 2 dwgp
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申请公布号 |
RU2110877(C1) |
申请公布日期 |
1998.05.10 |
申请号 |
RU19920015343 |
申请日期 |
1992.12.29 |
申请人 |
LYSENKO EVGENIJ MIKHAJLOVICH;OVCHARENKO IGOR' NIKOLAEVICH;OVCHARENKO NIKOLAJ IL'ICH |
发明人 |
LYSENKO EVGENIJ MIKHAJLOVICH;OVCHARENKO IGOR' NIKOLAEVICH;OVCHARENKO NIKOLAJ IL'ICH |
分类号 |
H02H7/09;H02H3/24;H02H7/08;(IPC1-7):H02H7/09 |
主分类号 |
H02H7/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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