SU1723599A1 - Thermal relay - Google Patents
Thermal relay Download PDFInfo
- Publication number
- SU1723599A1 SU1723599A1 SU904826742A SU4826742A SU1723599A1 SU 1723599 A1 SU1723599 A1 SU 1723599A1 SU 904826742 A SU904826742 A SU 904826742A SU 4826742 A SU4826742 A SU 4826742A SU 1723599 A1 SU1723599 A1 SU 1723599A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- thermal
- stator winding
- electric motor
- phases
- thermal relay
- Prior art date
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- Thermally Actuated Switches (AREA)
- Control Of Ac Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
Изобретение относитс к электротехнике , а именно к устройствам дл тепловой защиты электродвигателей. Цель изобрете- .ни - повышение быстродействи и надежности срабатывани . Устройство содержит три термореле, каждое из которых включено параллельно одной из фаз статорной обмотки электродвигател , а нулева точка заземлена . При любом нарушении работы электродвигател происходит перегрев статорной обмотки и срабатывание термореле. В результате происходит больша несимметри токов и надежное срабатывание автоматов защиты. 1 ил.The invention relates to electrical engineering, in particular to devices for thermal protection of electric motors. The purpose of the invention is to increase the speed and reliability of operation. The device contains three thermal switches, each of which is connected in parallel to one of the phases of the stator winding of the electric motor, and the zero point is grounded. In case of any malfunction of the electric motor, the stator winding overheats and the thermal relay is triggered. As a result, there is a large asymmetry of currents and reliable operation of the protection circuit breakers. 1 il.
Description
Изобретение относитс к электротехнике , в частности к устройствам дл тепловой защиты электродвигателей.The invention relates to electrical engineering, in particular to devices for thermal protection of electric motors.
Цель изобретени - повышение быстродействи и надежности срабатывани .The purpose of the invention is to increase the speed and reliability of operation.
На чертеже представлена схема устройства дл защиты трехфазного электродвигател .The drawing shows a diagram of a device for the protection of a three-phase electric motor.
Устройство содержит три термореле с замыкающими контактами, каждое из которых включено параллельно одной из фаз статорной обмотки электродвигател . Нулева точка обмотки заземлена.The device contains three thermal switches with closing contacts, each of which is connected in parallel to one of the phases of the stator winding of the electric motor. The zero point of the winding is grounded.
При нормальных режимах работы электродвигател по обмотке каждой фазы протекает номинальный ток, который разогревает статор до определенной температуры , и термореле не срабатывает, поэтому все напр жение падает на фазных обмотках.Under normal operating conditions of the motor, the rated current flows through the windings of each phase, which heats the stator to a certain temperature, and the thermal relay does not work, so all the voltage drops across the phase windings.
При любом нарушении работы, которое влечет за собой перегрев обмотки фазы, термореле замыкает контакты и ток течет через шунтирующие обмотку фазы замкнутые контакты термореле. В результате возникает больша несимметри токов, что приводит к более быстрому срабатыванию автоматов защиты сети и отключению электродвигател от сети.In case of any malfunction that leads to overheating of the phase winding, the thermal relay closes the contacts and current flows through the phase-wound shunt thermal contacts. As a result, a large asymmetry of the currents occurs, which leads to a more rapid activation of the circuit breakers of the network and the disconnection of the electric motor from the network.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU904826742A SU1723599A1 (en) | 1990-05-17 | 1990-05-17 | Thermal relay |
| SU4826742K SU1723621A1 (en) | 1990-05-17 | 1990-05-17 | Device for protection of three-phase electric motor against thermal load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU904826742A SU1723599A1 (en) | 1990-05-17 | 1990-05-17 | Thermal relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1723599A1 true SU1723599A1 (en) | 1992-03-30 |
Family
ID=21515001
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU904826742A SU1723599A1 (en) | 1990-05-17 | 1990-05-17 | Thermal relay |
| SU4826742K SU1723621A1 (en) | 1990-05-17 | 1990-05-17 | Device for protection of three-phase electric motor against thermal load |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU4826742K SU1723621A1 (en) | 1990-05-17 | 1990-05-17 | Device for protection of three-phase electric motor against thermal load |
Country Status (1)
| Country | Link |
|---|---|
| SU (2) | SU1723599A1 (en) |
-
1990
- 1990-05-17 SU SU904826742A patent/SU1723599A1/en active
- 1990-05-17 SU SU4826742K patent/SU1723621A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР № 1363366, кл. Н 02 Н 7/08. 1987. Электродвигатель ММТ-1,5, 8ЕЗ.124036 ЭЗ. * |
Also Published As
| Publication number | Publication date |
|---|---|
| SU1723621A1 (en) | 1992-03-30 |
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