SU78912A1 - Device for powering current coils of ohmmeter distance protection - Google Patents
Device for powering current coils of ohmmeter distance protectionInfo
- Publication number
- SU78912A1 SU78912A1 SU379281A SU379281A SU78912A1 SU 78912 A1 SU78912 A1 SU 78912A1 SU 379281 A SU379281 A SU 379281A SU 379281 A SU379281 A SU 379281A SU 78912 A1 SU78912 A1 SU 78912A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- ohmmeters
- ohmmeter
- current coils
- current
- distance protection
- Prior art date
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
Устройства дл защиты электрических установок от коротких замыканий между фазами и при замыкании на землю с применением омметров известны.Devices for protecting electrical installations against short-circuits between phases and when earth-faulting with ohmmeters are known.
Новым в предложении вл етс включение дл питани омметров промежуточных трехобмоточных трансформаторов, что увеличивает чувствительность действи защиты.New in the proposal is the inclusion for powering ohmmeters of intermediate three-winding transformers, which increases the sensitivity of the protection.
На череже изображена схема нредложенного устройства.The diagram shows the layout of the proposed device.
В три линейных провода А, В и С защищаемой установки включены три трехобмоточных премежуточных трансформатора У, имеющие две первичные обмотки 5 и 5 и одну вторичную обмотку 4. Обмотки 2 соединены в звезду, обмотки 3 vi 4 соединены в треугольник.Three linear wires A, B and C of the installation to be protected include three three-winding intermediate transformers Y, having two primary windings 5 and 5 and one secondary winding 4. Windings 2 are connected in a star, windings 3 vi 4 are connected in delta.
К верщинам треугольника, образованного обмотками 4, присоединены омметры 5, включенные звездой дл защиты установки от междуфазных повреждений, а в ветви этого треугольника включены омметры 6 дл защ.иты установки при по влении замыканий на землю. Омметры 5 включены в цепь, где протекающие токи пропорциональны разности линейных токов установки, г омметры 6 включены в цепь, где токи пропорциональны сумме линейного тока соответствующей фазы и тока в нулевом проводе.Ohmmeters 5, connected by a star to protect the installation from interfacial damage, are attached to the vertices of the triangle formed by the windings 4, and ohmmeters 6 are included in the branches of this triangle to protect the installation when a ground fault occurs. Ohmmeters 5 are included in the circuit, where the flowing currents are proportional to the difference of the linear currents of the installation, r Ohmmeters 6 are included in the circuit, where the currents are proportional to the sum of the linear current of the corresponding phase and the current in the neutral wire.
Промел уточиые трансформаторы, включенные по предложенной схеме, уменьщают токи в обмотках омметров и увеличивают чувствительность работы защиты. Указанные преимущества особенно вал-сны в тех случа х, когда в защищаемой системе возникают больщие токи коротких замыканий.Promelo utokichye transformers included in the proposed scheme, reduce the currents in the windings of ohmmeters and increase the sensitivity of the protection. These advantages are especially shaft-sleeps in cases when large short circuit currents occur in the protected system.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU379281A SU78912A1 (en) | 1947-08-29 | 1947-08-29 | Device for powering current coils of ohmmeter distance protection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU379281A SU78912A1 (en) | 1947-08-29 | 1947-08-29 | Device for powering current coils of ohmmeter distance protection |
Publications (1)
Publication Number | Publication Date |
---|---|
SU78912A1 true SU78912A1 (en) | 1948-11-30 |
Family
ID=48253095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU379281A SU78912A1 (en) | 1947-08-29 | 1947-08-29 | Device for powering current coils of ohmmeter distance protection |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU78912A1 (en) |
-
1947
- 1947-08-29 SU SU379281A patent/SU78912A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SU78912A1 (en) | Device for powering current coils of ohmmeter distance protection | |
US1776130A (en) | Protection of electric circuits | |
Khan et al. | Analysis of faults and protection schemes for magnetically controlled shunt reactor | |
US1752947A (en) | Protective system | |
SU107479A1 (en) | Device for the protection of three-phase electrical installation | |
SU143457A1 (en) | Device for the protection of electrical installations | |
SU438075A1 (en) | Differential Current Transformer | |
SU748528A1 (en) | Null-sequence current transformer | |
SU71434A1 (en) | Generator ground fault protection device | |
SU136813A1 (en) | The method of protection of voltage transformers in installations for monitoring the state of isolation of the high-voltage network | |
SU73839A1 (en) | Isolation control device in high voltage three-phase networks | |
SU147637A1 (en) | Method of protection of overhead lines 220/380 V | |
US1670985A (en) | Electric protection of transformers | |
SU904070A1 (en) | Device for differential current protection of electric machine with two parallel windings | |
SU464039A1 (en) | Device for protection against earth faults of the stator winding of the generator | |
SU66343A1 (en) | Device to protect high voltage transmission lines against short circuits between phases | |
US1503997A (en) | Protective device for alternating-current systems | |
US1818337A (en) | Electrical protective system | |
SU126540A1 (en) | Differential current protection of three-phase transformers | |
SU48721A1 (en) | Device for protection of multiphase generators with two parallel branches against short circuits between threads of the same phase | |
SU32609A1 (en) | Device for differential protection of multiphase current installations | |
US1752942A (en) | Protection of electric systems | |
SU48728A1 (en) | Device for differential protection of electric generators | |
SU62600A1 (en) | Device to protect the rotor winding of a synchronous generator from ground fault | |
SU26372A1 (en) | Device to protect multi-phase electrical lines from ground wiring |