SU126540A1 - Differential current protection of three-phase transformers - Google Patents
Differential current protection of three-phase transformersInfo
- Publication number
- SU126540A1 SU126540A1 SU628164A SU628164A SU126540A1 SU 126540 A1 SU126540 A1 SU 126540A1 SU 628164 A SU628164 A SU 628164A SU 628164 A SU628164 A SU 628164A SU 126540 A1 SU126540 A1 SU 126540A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- differential current
- current protection
- current
- phase transformers
- transformers
- Prior art date
Links
Landscapes
- Protection Of Transformers (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
Насто щее изобретение относитс к дифференциальным токовым защитам трехфазных трансформаторов, содержащим в каждой фазе токовое реле, включенное через трехобмоточный промежуточный трансформатор в цепь дифференциального токаПредлагаема защита отличаетс от известных тем, что дополнительные первичные обмотки трех промежуточных трансформаторов тока соединены последовательно и включены на трансформатор тока,- установленный в нейтрали силового трансформатора. Этим повыщаетс чувствительность защиты при замыкани х на землю в обмотке высщего напр жени силового трансформатораНа чертеже изображена нринципиа.тьна электрическа схема предлагаемой защитыЗащита содержит три реле /, включенных через промежуточные трехобмоточные трансформаторы тока 5 в дифференциальную цепь основных трансформаторов тока 3. Дополнительные обмотки трех промежуточных трансформаторов тока 2 соединены последовательно и подключены к трансформатору тока 4, установленному в нейтрали силового трансформатора 5Применение предлагаемой схемы позвол ет компенсировать токи нулевой последовательности и повысить чувствительность дифференциальной защиты при однофазных замыкани х, не понижа ее чувствительности при других видах повреждений.The present invention relates to differential current protection of three-phase transformers containing in each phase a current relay connected through a three-winding intermediate transformer to a differential current circuit. The proposed protection differs from the known ones in that the additional primary windings of three intermediate current transformers are connected in series and connected to a current transformer installed in the neutral power transformer. This increases the protection sensitivity when grounding in the high voltage winding of a power transformer. The drawing shows the principle of the proposed protection circuit. The protection contains three relays / connected through intermediate three-winding current transformers 5 to the differential circuit of the main current transformers 3. Additional windings of three intermediate transformers current 2 connected in series and connected to a current transformer 4 installed in the neutral of the power transformer 5 Prim nenie proposed scheme enables to compensate the zero sequence currents and to increase the sensitivity of the differential protection at x of single phase circuit, not lowering its sensitivity for other types of damage.
Предмет изобретени Subject invention
Дифференциальна токова защита трехфазных трансформатороз. содержаща в каждой фазе токовое реле, включенное через трехобмоточный промежуточный трансформатор и цепь .дифференциального тока.Differential current protection of three-phase transformers. a current relay in each phase, connected through a three-winding intermediate transformer and a differential current circuit.
отличающа с тем, что, с целью повышени чувствительности пои однофазных замыкани х, дополнительные первичные обмотки указанных промежуточных трансформаторов всех трех фаз соединены последовательно и подключены к трансформатору тока, включенному в цепь нейтрали силового трансформатораcharacterized in that, in order to increase the sensitivity of the single-phase closings, the additional primary windings of said intermediate transformers of all three phases are connected in series and connected to a current transformer connected to the neutral circuit of the power transformer
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU628164A SU126540A1 (en) | 1959-05-14 | 1959-05-14 | Differential current protection of three-phase transformers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU628164A SU126540A1 (en) | 1959-05-14 | 1959-05-14 | Differential current protection of three-phase transformers |
Publications (1)
Publication Number | Publication Date |
---|---|
SU126540A1 true SU126540A1 (en) | 1959-11-30 |
Family
ID=48397823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU628164A SU126540A1 (en) | 1959-05-14 | 1959-05-14 | Differential current protection of three-phase transformers |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU126540A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2618216C1 (en) * | 2016-02-24 | 2017-05-03 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" | Furnace transformer protection device |
-
1959
- 1959-05-14 SU SU628164A patent/SU126540A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2618216C1 (en) * | 2016-02-24 | 2017-05-03 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" | Furnace transformer protection device |
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