SU729532A1 - Arrangement for detecting line faults at single-phase earthing - Google Patents
Arrangement for detecting line faults at single-phase earthing Download PDFInfo
- Publication number
- SU729532A1 SU729532A1 SU762397406A SU2397406A SU729532A1 SU 729532 A1 SU729532 A1 SU 729532A1 SU 762397406 A SU762397406 A SU 762397406A SU 2397406 A SU2397406 A SU 2397406A SU 729532 A1 SU729532 A1 SU 729532A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- arrangement
- detecting line
- phase earthing
- line faults
- networks
- Prior art date
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- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Description
Изобретение относитс к области электротехники .This invention relates to the field of electrical engineering.
Известно устройство защиты от замыканий на землю, действие которого основано на измерении токов нулевой последовательности, при наличии которых (короткое замыкание), срабатывает схема сигнализации 1. Это устройство позвол ет обеспечить отстройку от токов переходного процесса (динамического тока) и обладает высокой точностью и чувствительностью . Однако достигаетс это благодар сложной схеме, что привопит к снижению.надежности устройства.A device for protection against earth faults is known, the action of which is based on the measurement of zero-sequence currents, in the presence of which (short circuit), the signaling circuit 1 is triggered. This device allows to provide detuning from the transient process currents (dynamic current) and has high accuracy and sensitivity . However, this is achieved due to the complex scheme, which leads to a reduction in the reliability of the device.
Наиболее близким к изобретению по технической сущности вл етс устройство дл обнаружени поврежденной линии при однофазных замыкани х на землю в сет х с изолированной нейтралью и в компенсированных сет х, содержащее трансформатор токов нулевой последовательности, запоминающие конденсаторы и сшнальные лампы, подключенные через тиристоры к источнику питани 2. Однако с помощью этого устройства невозможна отстройка от динамических токов линии-. КромеThe closest to the invention to the technical essence is a device for detecting a damaged line with single-phase ground faults in networks with insulated neutral and in compensated networks, containing a zero-sequence current transformer, memory capacitors, and rss lamps connected via thyristors to a power source. 2. However, using this device, it is impossible to tune from the dynamic currents of the line-. Besides
того, ему свойственна пониженна функциональна надежность, вследствие малой крутизны импульсов, отпирающих тиристоры.Moreover, it is characterized by reduced functional reliability, due to the small steepness of the pulses, which unlocks the thyristors.
Целью изобретени вл етс отстройка от динамических токов линии.The aim of the invention is the detuning from dynamic line currents.
Дл этого вторичные обмотки трансформаторов тока подключены через умножители напр жени и пороговые элементы к управл ющим переходам тиристоров.For this, the secondary windings of current transformers are connected via voltage multipliers and threshold elements to thyristor control transitions.
На чертеже дана принщ пиальна схема пред10 лагаемого устройства.The drawing shows the printable diagram of the proposed device.
Устройство содержит запоминающие конденсаторы 1, подключенные через диоды 2 к трансформаторам 3 тока нулевой последовательности каждой линии, пороговые элемента, на15 пример динис оры 4, подключенные между управл ющими электродают тиристоров 5 и общими точками соединени запоминающих конденсаторов 1 и катодами диодов 2, аноды которых соединены между собой к подключены20 к одному из выводов трансформаторов 3 тока нулевой последовательности и через кнодку 6 деблокировки с катодами тиристоров 5. ИсполШ1тельнь е органы, например сигнальные ламThe device contains storage capacitors 1, connected via diodes 2 to transformers 3 of the zero-sequence current of each line, threshold elements, for example, connectors 4 connected between control electrodes of thyristors 5 and common connection points of storage capacitors 1 and cathodes of diodes 2, the anodes of which are connected among themselves are connected 20 to one of the terminals of the transformer 3 of the zero-sequence current and, through the socket, unlocking 6 with the thyristor cathodes 5. Operator organs, for example signaling am
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762397406A SU729532A1 (en) | 1976-08-23 | 1976-08-23 | Arrangement for detecting line faults at single-phase earthing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762397406A SU729532A1 (en) | 1976-08-23 | 1976-08-23 | Arrangement for detecting line faults at single-phase earthing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU729532A1 true SU729532A1 (en) | 1980-04-25 |
Family
ID=20674505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762397406A SU729532A1 (en) | 1976-08-23 | 1976-08-23 | Arrangement for detecting line faults at single-phase earthing |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU729532A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297616A (en) * | 2014-09-28 | 2015-01-21 | 国家电网公司 | 10kV distribution line breaking detection method based on multi-system information interaction |
-
1976
- 1976-08-23 SU SU762397406A patent/SU729532A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297616A (en) * | 2014-09-28 | 2015-01-21 | 国家电网公司 | 10kV distribution line breaking detection method based on multi-system information interaction |
| CN104297616B (en) * | 2014-09-28 | 2017-03-15 | 国家电网公司 | A kind of 10kV distribution line broken string method for detecting interacted based on multi-system information |
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