SU1427477A1 - Protected three-phase independent network - Google Patents
Protected three-phase independent network Download PDFInfo
- Publication number
- SU1427477A1 SU1427477A1 SU864166868A SU4166868A SU1427477A1 SU 1427477 A1 SU1427477 A1 SU 1427477A1 SU 864166868 A SU864166868 A SU 864166868A SU 4166868 A SU4166868 A SU 4166868A SU 1427477 A1 SU1427477 A1 SU 1427477A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- current
- logic element
- input
- actuator
- output
- Prior art date
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- Control Of Ac Motors In General (AREA)
Abstract
Изобретение относитс к электротехнике , в частности к устройствам защиты от токов короткого замыкани . Цель изобретени - расширение области применени путем обеспечени возможности использовани в сети с переменной частотой. Это достигаетс тем. что устройство содержит трехфазный датчик тока 1, трехфазный датчик 2 напр жени , блок 3 измерени электромагнитной мощности, блок 4 определени пол рности тока, логический элемент ИЗ, исполнительный орган 6. В режиме короткого замыкани на второй вход логического элемента И 5 поступает сигнал 1 с выхода блока 3 о переходе электродвигател 11 в генераторный режим (режим подпитки точки короткого замрзжани ). В звене посто нного тока 9 преобразовател 7 тоты изменени направлени тока не происходит, так как энерги рассеиваетс в точке короткого замыкани и не поступает в греоб,разователь. Блок 4 вьщает сигнал 1 на первый вход элемента И 5. Ча выходе логического элемента И 5 по вл етс сигнал I, который поступает на отключающий вход исполнительного органа 6. Исполнительный орган срабатывает, лини I2 отключаетс от преобразовател 7 частоты, 3 ил.с The invention relates to electrical engineering, in particular to devices for protection against short-circuit currents. The purpose of the invention is to expand the field of application by allowing the use in a network with variable frequency. This is achieved by those. that the device contains a three-phase current sensor 1, a three-phase voltage sensor 2, an electromagnetic power measurement unit 3, a current polarity detection unit 4, an IZ logic element, an actuator 6. In a short circuit mode, the second input of the I5 logic element receives a signal 1 s the output of block 3 on the transition of the electric motor 11 to the generator mode (the mode of feeding the point of short freezing). In the DC link 9 of the converter 7 of the current, the current direction does not change, since the energy is dissipated at the point of the short circuit and does not flow into the greob, the distributor. Block 4 induces signal 1 to the first input of element AND 5. The output of logic element AND 5 appears at signal I, which is fed to the shut-off input of the actuator 6. The actuator triggers, line I2 is disconnected from frequency converter 7, 3 s.
Description
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Фиг.ЗFig.Z
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU864166868A SU1427477A1 (en) | 1986-12-24 | 1986-12-24 | Protected three-phase independent network |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU864166868A SU1427477A1 (en) | 1986-12-24 | 1986-12-24 | Protected three-phase independent network |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1427477A1 true SU1427477A1 (en) | 1988-09-30 |
Family
ID=21274969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU864166868A SU1427477A1 (en) | 1986-12-24 | 1986-12-24 | Protected three-phase independent network |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1427477A1 (en) |
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1986
- 1986-12-24 SU SU864166868A patent/SU1427477A1/en active
Non-Patent Citations (1)
Title |
---|
Гимо н Г.Г., Лейбов P.M. Релейна защита подземного электрооборудовани и сетей, М.: Недра, 1970, с. 145-154. Авторское свидетельство СССР №1173486, кл. Н 02 Н 7/26, 1983. * |
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