SU584696A1 - Device for maximum current protection of three-phase rectifier - Google Patents
Device for maximum current protection of three-phase rectifier Download PDFInfo
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- SU584696A1 SU584696A1 SU701493923A SU1493923A SU584696A1 SU 584696 A1 SU584696 A1 SU 584696A1 SU 701493923 A SU701493923 A SU 701493923A SU 1493923 A SU1493923 A SU 1493923A SU 584696 A1 SU584696 A1 SU 584696A1
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- USSR - Soviet Union
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- maximum current
- current protection
- currents
- current
- current transformers
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Abstract
УСТРОПСТВО ДЛЯ }1АКСИМАЛЬНОЙТОКОВОЙ ЗАЩИТЫ ТРЕХФАЗНОГО ВЫПРЯМИТЕЛЯ, установок плавки гололеда, содержащее три трансформатора тока с двум первичными обмотками и три реле, соединенные по схеме "полна звезда", отличающеес тем, что, с целью компенсации посто нных составл ющих первичных токов, первичные обмотки каждого из указанных трансформаторов тЬка включены на разность токов двух фаз оUSTROPSTVO FOR} 1AKSIMALNOYTOKOVOY PROTECTION three-phase rectifier, ice melting installations, comprising three current transformer with two primary windings and three relays connected in a "full star", characterized in that, to compensate for permanent constituting primary currents, the primary windings of each of the above transformers are connected to the difference of the currents of the two phases
Description
Описьпзасмое устройство относитс к устройствам дл максимальных токовы защит трехфазных вьтр51мителей установок дл плавки гололеда, содержащим три трансформатора тока и три реле, соединенные по схеме полна звезда оThe device relates to devices for overcurrent protection of three-phase inverters of ice melting installations containing three current transformers and three relays connected in a full star o circuit.
Недостатки известных устройств заключаютс в насыщении сердечников трансформаторов тока при замыкани х на землю в питающей сети переменного тока оThe disadvantages of the known devices are the saturation of the cores of current transformers during ground faults in the AC mains supply.
С целью устранени указанных недостатков , каждый из трансформаторов тока снабжендвум первичными обмотками , которые включены на разность токов двух фаз оIn order to eliminate these drawbacks, each of the current transformers is supplied with a primary winding, which are connected to the difference of the currents of the two phases
На чертеже изображена принципиальна схема описьтаемого устройстваThe drawing shows a schematic diagram of the device being described.
Трехфазный вьшр митель 1 установки дл плавки гололеда подключен к шинам питающей сети 2 через трансформаторы тока 3-5, содержащие по две первичные обмотки, включенные на разность токов двух фаз, Вторичные обмотки трансформаторов тока 3-5 и токовые реле 6-8 соединень по схеме полна звездаThree-phase power generator 1 for ice melting is connected to the mains 2 buses through current transformers 3-5, each containing two primary windings connected to the difference of currents of two phases, Secondary windings of current transformers 3-5 and current relays 6-8 connection according to the scheme full star
При замыкании на землю 9 в питающей сети переменного тока, а также при пробое или закорачивании одного из плеч вьшр мител 10, токи первичн обмоток трансформаторов тока 3-5 содержат посто нные составл ющие значительной величины Однако насыщени сердечников трансформаторов тока не произойдет, так как первичные обмотки включены на разность токов двух фаз, и во вторичной обмотке трансформаторов тока будет протекать ток, пропропорциональньй току третьей фазы.When short to ground 9 in the AC mains, as well as during the breakdown or shorting of one of the arms of the top 10, the currents of the primary windings of current transformers 3-5 contain permanent components of a significant value. However, the cores of the current transformers will not occur, since primary The windings are connected to the difference of the currents of the two phases, and a current proportioning to the current of the third phase will flow in the secondary winding of the current transformers.
Таким образом, максимальна токова защита трехфазного выпр мител установки плавки гололеда обладает достаточной чувствительностью при повреждени х , сопровождающихс наличием посто нных составл ющих в первичных токахоThus, the maximum current protection of the three-phase rectifier of the ice melting installation is of sufficient sensitivity for damage accompanied by the presence of constant components in the primary currents.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU701493923A SU584696A1 (en) | 1970-11-25 | 1970-11-25 | Device for maximum current protection of three-phase rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU701493923A SU584696A1 (en) | 1970-11-25 | 1970-11-25 | Device for maximum current protection of three-phase rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU584696A1 true SU584696A1 (en) | 1991-08-07 |
Family
ID=20460147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU701493923A SU584696A1 (en) | 1970-11-25 | 1970-11-25 | Device for maximum current protection of three-phase rectifier |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU584696A1 (en) |
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1970
- 1970-11-25 SU SU701493923A patent/SU584696A1/en active
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