SU752599A1 - Apparatus for protecting three-phase electric installation from power-supply phase-alternation change - Google Patents

Apparatus for protecting three-phase electric installation from power-supply phase-alternation change Download PDF

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Publication number
SU752599A1
SU752599A1 SU772519417A SU2519417A SU752599A1 SU 752599 A1 SU752599 A1 SU 752599A1 SU 772519417 A SU772519417 A SU 772519417A SU 2519417 A SU2519417 A SU 2519417A SU 752599 A1 SU752599 A1 SU 752599A1
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SU
USSR - Soviet Union
Prior art keywords
phase
protecting
power
thyristor
electric installation
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Application number
SU772519417A
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Russian (ru)
Inventor
Владимир Олегович Добряков
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Предприятие П/Я А-3570
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Priority to SU772519417A priority Critical patent/SU752599A1/en
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Publication of SU752599A1 publication Critical patent/SU752599A1/en

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Description

мы при неправильном пор дке чередовани  фаз.we are in the wrong order of phase rotation.

Устройство защиты трехфазной нагрузки от изменени  чередовани  фаз питающей сети содержит схему управлени  тиристором , состо щую из выпр мительного диода 1, ускор ющего конденсатора 2 и токоограничивающего резистора 3, выпр мительные диоды 4 и 5, токоограничивающий резистор 6, фазочувствительный орган-тиристор 7- каскад управлени  реле, состо щий из разделительного диода 8, и последовательно с ним соединенного защитного стабилитрона 9, подключенных к аноду тиристора и накопительному конденсатору 10, защунтированному резистором утечка 11. Через токоограничивающий резистор 12 к накопительному конденсатору 10 подключена база транзистора 13. Исполнительное реле 14 включено между коллектором транзистора и источником питани  реле +Е и зашунтировано диодом 15.The three-phase load protection device against alternating the alternating phases of the supply network contains a thyristor control circuit consisting of a rectifying diode 1, an accelerating capacitor 2 and a current limiting resistor 3, rectifying diodes 4 and 5, a current-limiting thyristor 6, a phase-sensitive thyristor body 7-stage control relay, consisting of the separation diode 8, and in series with it the connected protective zener diode 9 connected to the thyristor anode and the storage capacitor 10, the resistor bypassed by the drain 1 1. Through the current limiting resistor 12 to the storage capacitor 10 is connected the base of the transistor 13. Executive relay 14 is connected between the collector of the transistor and the power source of the relay + E and is bridged by a diode 15.

Устройство работает следующим образом .The device works as follows.

На анод тиристора 7 подаютс  любые две фазы трехфазного напр жени , например В т С (см. фиг. 1 и 2).Any two phases of a three-phase voltage, for example B t C, are supplied to the anode of the thyristor 7 (see Figs. 1 and 2).

При пр мом пор дке чередовани  фаз на управл ющий электрод тиристора подаетс  опережающа  фаза из подаваемых па анод тиристора. Тиристор открываетс  на врем  прохождени  фаз, подаваемых па анод. Напр жение на входе каскада управлени  реле отсутствует, конденсатор 10 разр жен, транзистор 13 заперт, и реле 14 - в исходном состо нии.In the direct order of phase alternation, a leading phase from the supplied thyristor anode is supplied to the control electrode of the thyristor. The thyristor is opened for the duration of the phases supplied by the PA anode. The voltage at the input of the relay control stage is missing, the capacitor 10 is discharged, the transistor 13 is locked, and the relay 14 is in the initial state.

При обратном пор дке чередовани  фаз па управл ющий электрод тиристора подаетс  остающа  фаза (см. фиг. 1 и 3) из подаваемых па анод тиристора. Тиристор заперт до ее прихода, и выпр мленное напр жение опережающей фазы зар жает конденсатор 10. Транзистор 13 насыщаетс , и реле 14 срабатывает, поддержива  на нагрузке пр мой пор док чередовани  фаз питающего напр жени .In the reverse order of phase alternation, the thyristor control electrode pa moves the remaining phase (see Figs. 1 and 3) from the thyristor anode supplied. The thyristor is locked before it arrives, and the rectified phase advance voltage charges the capacitor 10. The transistor 13 is saturated, and the relay 14 is activated, maintaining a direct alternation of the supply voltage on the load.

Принцип работы устройства исключает возможность ложного срабатывани  схемы при изменени х напр жени  и частоты трехфазной сети и обеспечивает требуемый режим работы контактора или реле.The principle of operation of the device eliminates the possibility of false triggering of the circuit during changes in the voltage and frequency of the three-phase network and provides the required operating mode of the contactor or relay.

Применение данного изобретени  позвол ет повысить надежность работы систем охлаждени  блоков, исключает возможность выхода из стро  (из-за перегрева) дорогосто щей аппаратуры при неправильном подключении ее к трехфазной сети.The application of this invention allows to increase the reliability of the cooling systems of the blocks, eliminates the possibility of failure (due to overheating) of expensive equipment if it is not properly connected to the three-phase network.

Применение в изобретении тиристора, подключенного к 2-м фазам трехфазной сети в качестве фазочувствительного элемента , позвол ет полностью исключить возможность ложного срабатывани  при значительных изменени х напр жени  и частоты трехфазной сети.The use of a thyristor connected to the 2 phases of the three-phase network as a phase-sensitive element in the invention makes it possible to completely eliminate the possibility of false alarms with significant changes in the voltage and frequency of the three-phase network.

Claims (3)

1.Авторское свидетельство СССР № 425260, кл. Н 02Н 3/26, 1975.1. USSR author's certificate number 425260, cl. H 02 H 3/26, 1975. 2.Авторское свидетельство СССР № 349056, кл. Н 02Н 3/26, 1970.2. USSR author's certificate number 349056, cl. H 02 H 3/26, 1970. 3. Авторское свидетельство СССР № 421087, кл. Н 02Н 3/08, Н 02Н 3/26, 1974.3. USSR author's certificate No. 421087, cl. H 02 H 3/08, H 02 H 3/26, 1974. ифif
SU772519417A 1977-08-22 1977-08-22 Apparatus for protecting three-phase electric installation from power-supply phase-alternation change SU752599A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU772519417A SU752599A1 (en) 1977-08-22 1977-08-22 Apparatus for protecting three-phase electric installation from power-supply phase-alternation change

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU772519417A SU752599A1 (en) 1977-08-22 1977-08-22 Apparatus for protecting three-phase electric installation from power-supply phase-alternation change

Publications (1)

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SU752599A1 true SU752599A1 (en) 1980-07-30

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SU772519417A SU752599A1 (en) 1977-08-22 1977-08-22 Apparatus for protecting three-phase electric installation from power-supply phase-alternation change

Country Status (1)

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