SU720610A1 - Device for protecting transformer against single-phase short circuit - Google Patents
Device for protecting transformer against single-phase short circuit Download PDFInfo
- Publication number
- SU720610A1 SU720610A1 SU782666224A SU2666224A SU720610A1 SU 720610 A1 SU720610 A1 SU 720610A1 SU 782666224 A SU782666224 A SU 782666224A SU 2666224 A SU2666224 A SU 2666224A SU 720610 A1 SU720610 A1 SU 720610A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- short circuit
- transformer
- phase short
- against single
- transformer against
- Prior art date
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
Изобретение относитс к технике релейной защиты и предназначено дл отключени трансформатора, имеющего обмотку, соединенную в .звезду с заземленной нейтралью, при однофазных коротких замыкани х в отход щих лини х электропередачи. Оно может быть использовано в качестве фильтра токов нулевой последовательности, когда необходимо подавать сигнал при определенной величине токов однофазного короткого замыкани .The invention relates to a relay protection technique and is intended to disconnect a transformer having a winding connected to a star with a grounded neutral, with single-phase short-circuits in the outgoing power lines. It can be used as a filter for zero-sequence currents, when it is necessary to give a signal at a certain value of single-phase short-circuit currents.
Известна токова защита нулевой последовательности трансформатора, содержаща трансформаторы тока в трех фазах, соединенные в фильтр токов, нулевой последовательности . К выходу фильтра подключены реагирующий и исполнительный органы 1.The current protection of a transformer's zero-sequence current is known, which contains three-phase current transformers connected to a zero-sequence current filter. To the output of the filter are connected reacting and executive bodies 1.
Недостатком такой защиты вл етс наличие дорогосто щих трансформаторов тока .The disadvantage of this protection is the presence of expensive current transformers.
Известны также токовые защиты от замыканий на корпус трансформатора, содержащие заземл ющую шину, на которой установлен трансформатор тока, к выходу его подключено реле тока 2.Current protection against short circuits on the transformer case is also known, which contain a grounding bus on which a current transformer is installed, and a current relay 2 is connected to its output.
Недостатком этой защиты вл етс возможность ложной работы при нарушении изол ции между корпусом трансформатора и фундаментом.The disadvantage of this protection is the possibility of false operation in case of insulation failure between the transformer case and the foundation.
Наиболее близким по технической сущности к предложенному вл етс устройствоThe closest in technical essence to the proposed device is
дл защиты трансформатора и автотрансформатора , содержащее измерительные катущки индуктивности, помещенные между стержн ми и обмотками трансформатора, подключенные через выпр митель к исполнительному органу 3.for protection of the transformer and autotransformer, containing measuring inductance coils placed between the rods and windings of the transformer, connected via a rectifier to the actuator 3.
Недостатком этого устройства вл етс низка чувствительность к токам однофазных коротких замыканий, когда величина этого тока соизмерим с токами нагрузки.The disadvantage of this device is low sensitivity to single-phase short-circuit currents, when the magnitude of this current is comparable with the load currents.
Целью изобретени вл етс повышениеThe aim of the invention is to increase
чувствительности устройства.device sensitivity.
Это достигаетс тем, что в предложенное устройство дл защиты трансформатора от однофазного короткого замыкани , содержащее измерительиый орган, выход которого подключен ко входу исполнительного органа, введены две магнитопровод щие скобы, закрепленные первыми концами на разных сторонах стержн магнитопроводаThis is achieved by the fact that in the proposed device for protection of a transformer from a single-phase short circuit, containing a measuring organ, the output of which is connected to the input of the actuator, two magnetic conductive brackets are inserted, fixed with first ends on opposite sides of the magnetic core
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782666224A SU720610A1 (en) | 1978-09-20 | 1978-09-20 | Device for protecting transformer against single-phase short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782666224A SU720610A1 (en) | 1978-09-20 | 1978-09-20 | Device for protecting transformer against single-phase short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU720610A1 true SU720610A1 (en) | 1980-03-05 |
Family
ID=20786131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782666224A SU720610A1 (en) | 1978-09-20 | 1978-09-20 | Device for protecting transformer against single-phase short circuit |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU720610A1 (en) |
-
1978
- 1978-09-20 SU SU782666224A patent/SU720610A1/en active
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