SU904070A1 - Device for differential current protection of electric machine with two parallel windings - Google Patents
Device for differential current protection of electric machine with two parallel windings Download PDFInfo
- Publication number
- SU904070A1 SU904070A1 SU782635139A SU2635139A SU904070A1 SU 904070 A1 SU904070 A1 SU 904070A1 SU 782635139 A SU782635139 A SU 782635139A SU 2635139 A SU2635139 A SU 2635139A SU 904070 A1 SU904070 A1 SU 904070A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- electric machine
- differential current
- current protection
- parallel windings
- windings
- Prior art date
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Description
(5) УСТРОЙСТВО ДЛЯТОКОВОЙ ДИФФЕРЕНЦИАЛЬНОЙ ЗАЩИТЫ ЭЛЕКТРИЧЕСКОЙ МАШИНЫ С ДВУМЯ ПАРАЛЛЕЛЬНЫМИ ОБМОТКАМИ(5) DEVICE FOR DECO-DIFFERENTIAL PROTECTION OF THE ELECTRIC MACHINE WITH TWO PARALLEL Winding
Изобретение относитс к электротехнике и может быть использовано дл релейной защиты электрической машины с параллельными обмотками.The invention relates to electrical engineering and can be used for relay protection of an electric machine with parallel windings.
Известно устройство дл попереч ной дифференциальной токовой защиты электрической машины с параллельными обмотками, содержащее трансформаторы тока, включенные в цепи параллельных обмоток. Вторичные обмотки трансформаторов тока соединены встречно-параллельно и подключены к реагирующему органу. Возникающа при повреждении параллельных обмоток разность их токов вы вл етс трансформаторами тока, что вызывает срабатывание реагирующего органа и отключение защищаемой машины 13.A device for transverse differential current protection of an electric machine with parallel windings is known, which contains current transformers connected in parallel winding circuits. The secondary windings of current transformers are connected in anti-parallel and connected to the reacting authority. When the parallel windings are damaged, the difference in their currents is detected by current transformers, which causes the response of the responsive organ and the shutdown of the protected machine 13.
Недостатком известного устройства вл етс невысока чувствительность , при повреждени х одной из параллельных обмоток вблизи установки трансформаторов тока или при замыканииA disadvantage of the known device is low sensitivity, in case of damage to one of the parallel windings near the installation of current transformers or when closing
между част ми обмоток с близким количеством витков.between the parts of the windings with a close number of turns.
Известно устройство дл дифференциальной токовой защиты трансформатора с параллельными обмотками, содержащее трансформаторы тока,включенные в цепи фаз всех обмоток защищаемого .трансформатора.A device for differential current protection of a transformer with parallel windings is known, which contains current transformers included in the phase circuits of all windings of a protected transformer.
.Коэффициенты трансформации и .The transformation ratios and
10 группы соединени вторичных обмото4с трансформаторов тока выбраны так,чтобы при протекании номинального тока в направлении защищаемого трансформатора вторичные токи одноименных 10 groups of connection of secondary transformers of current transformers are chosen so that when the rated current flows in the direction of the protected transformer, the secondary currents of the same name
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782635139A SU904070A1 (en) | 1978-06-26 | 1978-06-26 | Device for differential current protection of electric machine with two parallel windings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782635139A SU904070A1 (en) | 1978-06-26 | 1978-06-26 | Device for differential current protection of electric machine with two parallel windings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU904070A1 true SU904070A1 (en) | 1982-02-07 |
Family
ID=20772935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782635139A SU904070A1 (en) | 1978-06-26 | 1978-06-26 | Device for differential current protection of electric machine with two parallel windings |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU904070A1 (en) |
-
1978
- 1978-06-26 SU SU782635139A patent/SU904070A1/en active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB812672A (en) | Improvements in or relating to the protection of shunt capacitor banks for alternating current lines | |
| SU904070A1 (en) | Device for differential current protection of electric machine with two parallel windings | |
| US2238570A (en) | Fault indicating means | |
| Michelson | Rectifier relay for transformer protection | |
| Sherwani et al. | Improving the characteristic of percentage differential relay of power transformer using rogowski coil with extended park’s vector approach | |
| GB858646A (en) | Improvements in or relating to the protection of alternating current generators | |
| SU1010690A1 (en) | Device for protecting generator-transformer assembly from earthing | |
| SU748528A1 (en) | Null-sequence current transformer | |
| US1818337A (en) | Electrical protective system | |
| SU720610A1 (en) | Device for protecting transformer against single-phase short circuit | |
| SU843078A1 (en) | Inverse sequence current relay | |
| RU2260865C2 (en) | Differential current transformer | |
| SU126540A1 (en) | Differential current protection of three-phase transformers | |
| SU1035716A1 (en) | Device for protecting synchronous generator against earthing in one point of excitation circuit | |
| SU107479A1 (en) | Device for the protection of three-phase electrical installation | |
| SU106197A1 (en) | Single-system longitudinal differential current protection of three-phase generators | |
| SU1372451A1 (en) | Arrangement for protecting one of parallel-operating transformers of distribution networks with insulated neutral wire | |
| SU545033A1 (en) | Device for selectively protecting feed feeders from earth faults | |
| RU2028703C1 (en) | Device for protection of generator against fault to ground | |
| SU78912A1 (en) | Device for powering current coils of ohmmeter distance protection | |
| SU105708A2 (en) | High-frequency differential protection | |
| SU817841A1 (en) | Device for differential protection of transformer | |
| SU391675A1 (en) | DEVICE FOR PROTECTION AGAINST SHORT CIRCUITS | |
| SU143457A1 (en) | Device for the protection of electrical installations | |
| SU922941A1 (en) | Device for protecting three-phase electric equipment from breaking one of phase wires |