SU970551A2 - Device for two-phase operation protection of three-phase electric motor - Google Patents

Device for two-phase operation protection of three-phase electric motor Download PDF

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Publication number
SU970551A2
SU970551A2 SU813262860A SU3262860A SU970551A2 SU 970551 A2 SU970551 A2 SU 970551A2 SU 813262860 A SU813262860 A SU 813262860A SU 3262860 A SU3262860 A SU 3262860A SU 970551 A2 SU970551 A2 SU 970551A2
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SU
USSR - Soviet Union
Prior art keywords
phase
electric motor
operation protection
voltage
relay
Prior art date
Application number
SU813262860A
Other languages
Russian (ru)
Inventor
Константин Валентинович Коломойцев
Original Assignee
Ивано-Франковский Институт Нефти И Газа
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Ивано-Франковский Институт Нефти И Газа filed Critical Ивано-Франковский Институт Нефти И Газа
Priority to SU813262860A priority Critical patent/SU970551A2/en
Application granted granted Critical
Publication of SU970551A2 publication Critical patent/SU970551A2/en

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Protection Of Generators And Motors (AREA)

Description

вых реле 9. Замыкающий контакт 13 реле 1 включен в цепь управлени  двигателем последовательно с контактом 14 командного органа. Подключение двигател  к сети осуществл етс  контактами 15 магнитного пускател .output relays 9. The closing contact 13 of relay 1 is included in the motor control circuit in series with the contact 14 of the command body. The motor is connected to the network by the contacts 15 of the magnetic starter.

Диоды 5 в каждой фазе выполн ют „функции однополупериодного выпр мител , к выходу которого подключены конденсатор б фильтра и вход стабилизатора посто нного напр жени , (выход которого нагружен на Обмотку герконового реле 9. Резистор 7 служит дл  настройки схемы., Исправные предохранители 3 шунтируют вход однополупериодных в.ыпр мителей в фазах двигател , в результате чего напр жение на конденсаторе б отсутствует , а обмотки герконовых реле 9 обесточены и контакты 12 этих реле в цепи управл ющего тиристора 4 замкнуты .Diodes 5 in each phase function as a half-wave rectifier whose output is connected to a filter capacitor b and a constant voltage regulator input (the output of which is loaded on the winding of a reed switch 9. Resistor 7 serves to adjust the circuit. The serviceable fuses 3 bypass the half-wave input of the inverters in the motor phases, as a result of which the voltage on the capacitor b is absent, and the windings of the reed relays 9 are de-energized and the contacts 12 of these relays in the control thyristor circuit 4 are closed.

Устройство работает следующим образом.The device works as follows.

При исправных предохранител х 3 тиристор 4 периодически открываетс  в результате чего реле 1 срабатывает и находитс  в этом состо нии за счет конденсатора 2. При этом замыкаетс  контакт 13 реле 1 в цепи управлени  двигателем, и последний . запускаетс , если контакт 14 командного устройства замкнут.With intact fuses 3, the thyristor 4 periodically opens, causing relay 1 to operate and be in this state at the expense of capacitor 2. This closes the contact 13 of relay 1 in the motor control circuit and the latter. triggered if contact 14 of the command device is closed.

Перегорание плавкойвставки любого из предохранителей 3 приводит к тому, что последовательна  цепочка 5-7 оказываетс  под напр жением, следовательно, под напр жением находитс  вход стабилизатора 8. Это приводит к срабатыванию геркойового реле 9, которое размыкает свой контакт 12 в цепи управл ющего электрода тиристора 4. Тиристор 4 закрываес , реле 1 обесточиваетс  и размыкает свой 14 в цепи управлени  двигател , что приводит к его отключению контактами 15, Изменение нагрузки на валу двигател  при его работеBlowing the fusible insert of any of the fuses 3 causes the series 5-7 to be sequentially under voltage, therefore, the input of the stabilizer 8 is under voltage. This leads to the activation of the winding relay 9, which opens its contact 12 in the control thyristor circuit 4. The thyristor 4 is closed, the relay 1 de-energizes and opens its 14 in the engine control circuit, which causes it to be disconnected by contacts 15, Change in the load on the motor shaft during its operation

и перегорании предохранител  приводит к изменению величины напр жени  на конденсаторе б, т.е. на входе стабилизатора 8, но при этом величина напр жени  на обмотке герконовогоand the blown fuse causes a change in the value of the voltage on the capacitor b, i.e. at the input of the stabilizer 8, but the magnitude of the voltage on the reed winding

0 еле 9 остаетс  неизменной, что0 barely 9 remains unchanged that

обеспечивает отключение защищаемого двигател  и в этом случае.provides shutdown of the protected engine in this case.

Таким образом, дополнительное введение стабилизаторов посто нногоThus, the additional introduction of constant stabilizers

5 напр жени  в предлагаемое устройство повышает надежность работы защиты, котора  обеспечивает в этом случае (при перегорании -предохранител ) от .ключение электродвигателей,.работающих не только с посто нной, но и с переменной нагрузкой на валу.5 voltage in the proposed device improves the reliability of the protection, which provides in this case (when the fuse blows) from .turning of electric motors that operate not only with constant but also with variable load on the shaft.

Claims (1)

1. Авторское свидетельство СССР № 758364, кл. Н 02 Н 7/08, 1978.1. USSR author's certificate No. 758364, cl. H 02 H 7/08, 1978. 00 ГR 6 Bife/T ь yff/xrff/reffi/tr 6 Bife / T yff / xrff / reffi / tr
SU813262860A 1981-03-23 1981-03-23 Device for two-phase operation protection of three-phase electric motor SU970551A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU813262860A SU970551A2 (en) 1981-03-23 1981-03-23 Device for two-phase operation protection of three-phase electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU813262860A SU970551A2 (en) 1981-03-23 1981-03-23 Device for two-phase operation protection of three-phase electric motor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
SU758364A Addition SU157990A1 (en)

Publications (1)

Publication Number Publication Date
SU970551A2 true SU970551A2 (en) 1982-10-30

Family

ID=20948562

Family Applications (1)

Application Number Title Priority Date Filing Date
SU813262860A SU970551A2 (en) 1981-03-23 1981-03-23 Device for two-phase operation protection of three-phase electric motor

Country Status (1)

Country Link
SU (1) SU970551A2 (en)

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