SU472416A1 - Three-phase AC power protection device - Google Patents
Three-phase AC power protection deviceInfo
- Publication number
- SU472416A1 SU472416A1 SU1907523A SU1907523A SU472416A1 SU 472416 A1 SU472416 A1 SU 472416A1 SU 1907523 A SU1907523 A SU 1907523A SU 1907523 A SU1907523 A SU 1907523A SU 472416 A1 SU472416 A1 SU 472416A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phase
- circuit
- protection device
- power protection
- diode
- Prior art date
Links
Landscapes
- Rectifiers (AREA)
- Protection Of Static Devices (AREA)
Description
вл етс предварительный контроль сопротивлени нзол пии т говой сетн с помощью чунстиптельного элемента 7. Ко1да напр жение фазы С действует в обратном выпр мл емому вентил ми 2, 3 напр жению, последние заперты. В этот момент оперативным током питаетс реле 7 через диод 10 и резисторы 12, 13, 14. Срабатывание реле 7 приводит к включению тиристора 6 и контактора 5, вследствие чего нагрузка 22 питаетс выпр мленным током через вентили 2 и 3 и заграждающий диод 23. Однако, еели сопротивление изол ции низкое, то цепь элемента 7 шунтируетс цепью, состо щей из сопротивлени 25 изол ции и диода 11, и сработать не может, вследствие чего не включаютс тиристор 6 и контактор 5.This is a preliminary control of the resistance to the squeezing of the traction network with the help of the chunstile element 7. When the voltage of phase C acts in the reverse rectifying mode 2, 3, the voltage is locked. At this moment, relay 7 is energized by the operating current through diode 10 and resistors 12, 13, 14. The operation of relay 7 causes the thyristor 6 and contactor 5 to turn on, as a result of which the load 22 is fed with rectified current through valves 2 and 3 and the blocking diode 23. However If the insulation resistance is low, then the circuit of the element 7 is bridged by a circuit consisting of the insulation resistance 25 and the diode 11, and cannot be activated, as a result of which the thyristor 6 and the contactor 5 are not turned on.
Э.гемент настраиваетс только по режиму контрол изол ции при отключенной т говой сети. После включени т говой сети контроль изол ции осундествл етс дополнительным чувствнтельным элементом 9, который при повреждепии изол ции, коротком замыкании п,а землк) пли нрикосиовеиии че.човека к контактному проводу обтекаетс оператпвным током от фазы С через сопротивление изол iijin 25, диод 15 и копдеисаторы 16, 17. Срабатывание элемента 9 вызывает отключение коитактом 8 элемента 7 и отключение тнриетором 6 и ко1ггактором 5 т говой сети.The e-mail is configured only according to the insulation monitoring mode with the traction network disconnected. After switching on the traction network, the isolation control is osunified by an additional sensing element 9, which, if the insulation is damaged, the circuit is short, and the earth goes to the contact wire, it flows through the resistance iijin 25, diode 15 to the contact wire. and copdeisators 16, 17. Triggering of element 9 causes coitact 8 of element 7 to switch off and disconnection by the trigger 6 and co-operator of the 5th tract network.
Наличие копдеисаторов 16, 17 обеспечивает быстрый во времени бросок тока в цепи облютки элеме1гга 9. Диод 15 иредотвращает протекание тока пагрузкн т говой сети черезThe presence of co-detectors 16, 17 provides a quick inrush of current in the circuit of the elem1 9 circuit. The diode 15 also prevents the current flow of the load through the network.
обмотку элемента 9 при закрытом тиристоре 6, а диод 11 предотвращает вли ние цепи элемента 7 на величину оперативного тока в цепи элемента 9.the winding of the element 9 when the thyristor 6 is closed, and the diode 11 prevents the influence of the circuit of the element 7 on the magnitude of the operational current in the circuit of the element 9.
Элемент 9 настраиваете на срабатывание только в режиме коитрол изол ции включеиной т говой сети и работает независимо от элемеита 7. Такое построение с.хемы защиты и разв зка цеией элементов 7 и 9 обеспечивакл высокую устойчивость и иадежиоеть устройства дл защиты.Element 9 adjusts to act only in the coitrol mode of isolation of the on-off traction network and works independently of element 7. Such a construction of a protection circuit and isolation of elements 7 and 9 ensures high stability and reliability of the protection device.
П р е д м с т и 3 о б р е т е и и PREDIMT AND 3 ABOUT THEM and and
Устройство дл защиты т говой сети с тре.хфазным источником иеременного тока, подключенным одной фазой к рельсам, а другими через выпр .1ители с параллельно подключенными конденеаторами и отключаюни1Й аппарат к цепи нагрузки, содержащее Tnpiicтор , включенный в цепь нагрузки т говой сети , и чувствительный элемент, один ввод которого через два встречно включенны.х диода соединен с контактным ироводом, средн точка между этими диодамП через резнсторь иодсоедиие 1а к двум фазам иеточиика иеремениого тока, а за.мыкаюп1,ий коитакт нодключен к цепи управлени тиристором, отличающеес тем, что, е целью повыщени надежности защиты, параллельно тиристору включены последовательно соединенные обмотка дополнительного чувствительпого э:1емента и диод, размыкающий контакт этого элемента включен между катущкой основного чувствител1Л10го элемента и рельсом.A device for protection of the traction network with a three-phase source of alternating current, connected by one phase to the rails, and the other through rectifier 1 with parallel-connected condensers and disconnecting the device to the load circuit containing the Tnpiictor connected to the load circuit of the tram network and sensitive the element, one input of which through two counter-inclusive diodes is connected to the contact conductor, the midpoint between these diodesP through the connector 1a to the two phases of the current and the alternating current, and the interconnection to thyristor control circuits, characterized in that, in order to increase the reliability of protection, parallel to the thyristor, connected in series are the additional sensing windings of the element and the diode, the break contact of this element is connected between the core of the main sensing element and the rail.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1907523A SU472416A1 (en) | 1973-04-20 | 1973-04-20 | Three-phase AC power protection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1907523A SU472416A1 (en) | 1973-04-20 | 1973-04-20 | Three-phase AC power protection device |
Publications (1)
Publication Number | Publication Date |
---|---|
SU472416A1 true SU472416A1 (en) | 1975-05-30 |
Family
ID=20549478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1907523A SU472416A1 (en) | 1973-04-20 | 1973-04-20 | Three-phase AC power protection device |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU472416A1 (en) |
-
1973
- 1973-04-20 SU SU1907523A patent/SU472416A1/en active
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