SU702453A2 - Device for protecting a three-phase electric motor - Google Patents
Device for protecting a three-phase electric motorInfo
- Publication number
- SU702453A2 SU702453A2 SU782635962A SU2635962A SU702453A2 SU 702453 A2 SU702453 A2 SU 702453A2 SU 782635962 A SU782635962 A SU 782635962A SU 2635962 A SU2635962 A SU 2635962A SU 702453 A2 SU702453 A2 SU 702453A2
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- electric motor
- phase electric
- protecting
- thyristor
- phase
- Prior art date
Links
Landscapes
- Protection Of Generators And Motors (AREA)
Description
(54) УСТРОЙСТВО ДЛЯ ЗАШИТЫ ТРЕХФАЗНОГО ЭЛЕКТРОДВИГАТЕЛЯ(54) DEVICE FOR PROTECTING A THREE-PHASE ELECTRIC MOTOR
Изобретение относитс к электротехнике и может быть использовано дл зашиты трехфазного-электродвигател от повреждений и перегрузок.The invention relates to electrical engineering and can be used to protect a three-phase electric motor against damage and overloads.
Известно устройство дл защиты трёхфазного электродвигател по авт. св № 610229, содержащее два трансформатора тока, включе1ган1&. на разность фазных токов. Вторичные обмотки трансформаторов тока присоединены к кольцевому детектору, а к средним точкам вторичных обмоток присоединена одна обмотка реле, втора обмотеа которого последовательно с диодом и тиристором включена между нейтралью н корпусом защищаемого двигател JJL . Управл ющий электрод тиристора через динистор присоединен к RC-контуру, который включен между диодом и катодом тиристора .A device for the protection of a three-phase electric motor according to ed. Sv No. 610229, containing two current transformers, including 1 & 1. on the difference of phase currents. The secondary windings of current transformers are connected to a ring detector, and one relay winding is connected to the middle points of the secondary windings, the second winding of which is connected in series with the diode and thyristor between the neutral body of the protected JJL motor. The thyristor control electrode is connected through a dynistor to an RC circuit, which is connected between the diode and the thyristor cathode.
При несимметричных повреждени х обмотки защищаемого электродвигател разность фаз токов принимает такое зна чение, которое вызывает срабатываниеIn case of asymmetrical damage to the winding of the protected motor, the phase difference of the currents takes the value that causes the operation
реле и отключение электродвигател . При замыкьнии на корпус по вл етс напр жение нейтрали относительно корпуса , которое выпр мл етс диодом и вызывает срабатывание динистора, тиристрра и реле.relay and shutdown of the electric motor. When short-circuited to the case, a neutral voltage is generated relative to the case, which is rectified by a diode and causes a dynistor, a thyristor, and a relay to trip.
Недостатками известного электродвигател вл ютс его узкие функциональные возможности вследствие нечувствительности к симметричным перегрузкам.The disadvantages of the known electric motor are its narrow functionality due to insensitivity to symmetrical overloads.
Цель изобретени - расширение функциональных возможностей путем обеспечени действий устройства при сим: метричных перегрузках.The purpose of the invention is to expand the functionality by ensuring the actions of the device with this: metric overloads.
Указанна цель достигаетс тем, что известное устройство дл зашиты трехфазного электродвигател по авт. св. № 610229 дополнительно снабжено третьим диодом, третьим резистором, потенциометром и вторыми Конденсатором , динистором и тиристором, при этом вход потенциометра через третий пиод роединен с диагональю кольцевого пегектора , выход потенциометра зашунтиThis goal is achieved by the fact that the known device for protection of a three-phase electric motor according to the author. St. No. 610229 is additionally equipped with a third diode, a third resistor, a potentiometer and a second capacitor, a dynistor and a thyristor, and the input of the potentiometer is connected to the diagonal of the pegtor via the third peak,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782635962A SU702453A2 (en) | 1978-06-28 | 1978-06-28 | Device for protecting a three-phase electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782635962A SU702453A2 (en) | 1978-06-28 | 1978-06-28 | Device for protecting a three-phase electric motor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU610229 Addition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU702453A2 true SU702453A2 (en) | 1979-12-05 |
Family
ID=20773285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782635962A SU702453A2 (en) | 1978-06-28 | 1978-06-28 | Device for protecting a three-phase electric motor |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU702453A2 (en) |
-
1978
- 1978-06-28 SU SU782635962A patent/SU702453A2/en active
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