SU1474780A2 - Ac motor overload protection device - Google Patents
Ac motor overload protection device Download PDFInfo
- Publication number
- SU1474780A2 SU1474780A2 SU874243988A SU4243988A SU1474780A2 SU 1474780 A2 SU1474780 A2 SU 1474780A2 SU 874243988 A SU874243988 A SU 874243988A SU 4243988 A SU4243988 A SU 4243988A SU 1474780 A2 SU1474780 A2 SU 1474780A2
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- output
- input
- threshold organ
- pulse expander
- protection device
- Prior art date
Links
Landscapes
- Protection Of Generators And Motors (AREA)
Abstract
Изобретение относитс к электротехнике, а именно к устройствам релейной защиты, и может быть использовано дл защиты электродвигателей от перегрузки по току и коротких замыканий в режиме пуска с заклиненным ротором. Цель изобретени - исключение ложного срабатывани при самозапуске электродвигател . В устройство дополнительно введены последовательно соединенные пороговый орган 15, формирователь модул 16, элемент ЗАПРЕТ 17 и расширитель импульсов 18. При этом входы порогового органа подключены к соответствующим выходам формирователей 4 и 5 выпр мленных сигналов, пропорциональных значени м полуволн токов положительной и отрицательной пол рности, выход расширител импульсов 18 соединен с управл ющим входом блокирующего ключа 14. 1 ил.The invention relates to electrical engineering, namely, relay protection devices, and can be used to protect electric motors against overcurrent and short circuits in the starting mode with a wedged rotor. The purpose of the invention is the elimination of false alarms during self-starting of an electric motor. The device is additionally introduced in series with the threshold organ 15, the modulator driver 16, the element BANCH 17 and the pulse expander 18. At the same time, the inputs of the threshold organ are connected to the corresponding outputs of the inverter 4 and 5 rectified signals proportional to the values of the half-wave currents of positive and negative polarity the output of the pulse expander 18 is connected to the control input of the blocking key 14. 1 sludge.
Description
запуске уменьшаетс число пр мых пус- ю НЬ1Х значени м полуволн токов положи-1start-up, the number of direct start-ups Hb1X values of half-waves of currents put-1 is reduced
ков двигателей, сокращающих срок их службы,forge engines that reduce their lifespan,
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874243988A SU1474780A2 (en) | 1987-04-06 | 1987-04-06 | Ac motor overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874243988A SU1474780A2 (en) | 1987-04-06 | 1987-04-06 | Ac motor overload protection device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1319132A Addition SU286857A1 (en) | DEVICE FOR MEASUREMENT OF VISCOSITY |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1474780A2 true SU1474780A2 (en) | 1989-04-23 |
Family
ID=21303851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874243988A SU1474780A2 (en) | 1987-04-06 | 1987-04-06 | Ac motor overload protection device |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1474780A2 (en) |
-
1987
- 1987-04-06 SU SU874243988A patent/SU1474780A2/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР № 1319132, кп. Н 02 Н 3/08, 1983. * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU1474780A2 (en) | Ac motor overload protection device | |
| SU1598027A2 (en) | Overload and overcurrent protection device for electric motor | |
| RU2156019C2 (en) | Asynchronous-running protective device for synchronous motor | |
| RU1820438C (en) | Device for protection of motor from phase break in three-phase power line | |
| SU1086498A1 (en) | Overall protection device for three-phase asynchronous motor | |
| SU1347114A2 (en) | Device for protecting three-phase electric motors against operation on two phases | |
| RU2101843C1 (en) | Device for start of induction motor with phase rotor | |
| RU1778855C (en) | Device for current protection of commutator motor | |
| SU1398016A1 (en) | Device for overload and overcurrent protection of electric motor | |
| SU1309161A1 (en) | Device for protection of electric motor against overload when starting | |
| SU1320861A1 (en) | Device for protecting three-phase induction electric motor from two-phase operation and locked rotor operation | |
| RU2010252C1 (en) | Device for formation of current pulses for location of shorting in cable lines | |
| SU609186A1 (en) | Device for pulsed overexcitation of hysteresis motor | |
| SU1443095A1 (en) | Method of controlling direct frequency converter for induction electric drive | |
| SU1410161A1 (en) | Maximum-current relay | |
| SU1628125A1 (en) | Ac electric drive | |
| SU1713011A1 (en) | Asymmetric internal short-circuit protection for synchronous generators | |
| SU836723A1 (en) | Power supply system | |
| SU983966A1 (en) | Device for excitation of synchronous machine | |
| SU1365227A1 (en) | Method of protecting synchronous generator with controlled exciter from stator overcurrent | |
| SU873368A1 (en) | Device for synchronous machine excitation | |
| SU675524A1 (en) | Protection device | |
| SU438077A1 (en) | Device to protect aircraft dc generator | |
| RU2044154C1 (en) | Octane-corrector | |
| SU1372452A1 (en) | Apparatus for differential-phase protection of power transformer |