SU488279A1 - Device to protect three-phase motors from working on two phases - Google Patents
Device to protect three-phase motors from working on two phasesInfo
- Publication number
- SU488279A1 SU488279A1 SU1886908A SU1886908A SU488279A1 SU 488279 A1 SU488279 A1 SU 488279A1 SU 1886908 A SU1886908 A SU 1886908A SU 1886908 A SU1886908 A SU 1886908A SU 488279 A1 SU488279 A1 SU 488279A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phases
- protect
- working
- thyristor
- phase
- Prior art date
Links
Landscapes
- Relay Circuits (AREA)
Description
1one
Изобретение предназначено дл защиты трехфазных асинхронных электродвигателей с повторно-кратковременным режи-мом от работы на двух фазах в случае перегорани предохранител или обрыва любой из фаз питающей сети.The invention is intended to protect three-phase asynchronous electric motors with intermittent operation from two-phase operation in the event of a safety fuse or a break in any of the phases of the supply network.
Известны устройства дл защиты трехфазных электродвигателей от работы на двух фазах , содержащие реле посто нного тока, зашунтированное конденсатором и включенное последовательно с тиристором, в цепи управлени (Которого включены диод и резистор, а контакт реле включен в -цепи управлени электродвигателем.Devices for protecting three-phase electric motors from two-phase operation are known, which contain a DC relay, shunted by a capacitor and connected in series with a thyristor, in a control circuit (which includes a diode and a resistor, and a relay contact is included in the motor control circuit.
В предлагаемом устройстве дл упрощени и повышени надежности электроды тиристора подключены к фазам трехфазной сети.In the proposed device, to simplify and improve reliability, the thyristor electrodes are connected to the phases of a three-phase network.
На чертеже дана принципиальна схема описываемого устройства.The drawing is a schematic diagram of the described device.
Устройство содержит катушку 1 и контакт 2 исполнительного реле, тиристор 3, диод 4, резистор 5 и конденсатор 6.The device contains a coil 1 and pin 2 of the executive relay, thyristor 3, diode 4, resistor 5 and capacitor 6.
При наличии напр жени всех трех фаз А, б « С питающей сети на управл ющий электрод тиристора 3 через диод 4 и резистор 5 подаетс сигнал положительной пол рности и тиристор периодически от1крываетс . Это приводит К срабатыванию реле 1, которое находитс -s та.ком состо нии в течение всего периода благодар конденсатору 6. Контакт 2When all three phases A, B are present. From the mains supply, the control electrode of the thyristor 3 is supplied through diode 4 and resistor 5 with a positive polarity signal and the thyristor opens periodically. This causes Relay 1 to trip, which is -s in such a state for the entire period due to capacitor 6. Contact 2
реле, замыка сь, подготавливает цепь управлени электродвигателем 7 к работе.the relay, closing, prepares the motor control circuit 7 for operation.
При замьикании контакта 8 задающего-устройства катушка 9 магнитного пускател получает питание, его контакты 10 замыкаютс и электродвигатель 7 запускаетс .When the contact 8 of the master device is closed, the coil 9 of the magnetic starter is energized, its contacts 10 are closed and the electric motor 7 is started.
При обрыве любой из фаз питающей сети или .сгорании предохранител 11 и отключении контакта 8 задающего устройства катушка 9 магнитного пускател обесточиваетс и его силовые Конта1кты 10 размыкаютс , отключа двигатель от сети. Одновременно тиристор 3 запираетс , катушка 1 реле обесточиваетс п его контакт 2 в цепи катушки 9When any of the phases of the supply network or the ignition of the fuse 11 is disconnected and the contact 8 of the setting device is disconnected, the coil 9 of the magnetic starter de-energizes and its power contacts 10 are opened by disconnecting the motor from the network. At the same time, the thyristor 3 is locked, the coil 1 of the relay de-energizes n its contact 2 in the circuit of the coil 9
магнитного пускател размыкаетс , обеспечива защиту двигател от повторных пусков и работы на двух фазах.The magnetic starter opens, protecting the engine from re-starting and running on two phases.
Предмет i з о б р с т е н и Subject i h ibn
Устройство дл защиты трехфазных электродвигателей от работы на двух фазах, содержащее реле посто нного тока, зашунтированное конденсатором и включенное последовательно с тиристором, в цепи управлени iKOторого включены диод и резистор, а контакт реле включен в цепи управлени электродвигателем , отличающеес тем, что, с целью упрощени и повышени надежности, электроды тиристора подключены к фазам трехфазной сети.A device for protection of three-phase electric motors from two-phase operation, containing a DC relay, shunted by a capacitor and connected in series with the thyristor, a diode and a resistor are connected to the iKO control circuit, and the relay contact is included in the motor control circuit simplifying and improving reliability, the thyristor electrodes are connected to the phases of a three-phase network.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1886908A SU488279A1 (en) | 1973-02-26 | 1973-02-26 | Device to protect three-phase motors from working on two phases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1886908A SU488279A1 (en) | 1973-02-26 | 1973-02-26 | Device to protect three-phase motors from working on two phases |
Publications (1)
Publication Number | Publication Date |
---|---|
SU488279A1 true SU488279A1 (en) | 1975-10-15 |
Family
ID=20543579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1886908A SU488279A1 (en) | 1973-02-26 | 1973-02-26 | Device to protect three-phase motors from working on two phases |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU488279A1 (en) |
-
1973
- 1973-02-26 SU SU1886908A patent/SU488279A1/en active
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