SU502404A1

SU502404A1 - Device for arc-free disconnection of AC power circuits

Info

Publication number: SU502404A1
Application number: SU1817245A
Authority: SU
Inventors: Юрий Александрович Голубев
Priority date: 1972-07-25
Filing date: 1972-07-25
Publication date: 1976-02-05

Description

1one

Изобретение относитс к области коммутационных аппаратов дл бездугового отключени силовых цепей переменного тока.The invention relates to the field of switching devices for arc-free disconnection of AC power circuits.

Известные устройства дл бездугового отключени силовых цепей переменного тока, содержащие пол ризованные электромагниты, вентиль, включенный в диагональ моста, образованного подвижными и неподвижными контактами , сложны и недостаточно надежны.The known devices for arc-free disconnection of AC power circuits containing polarized electromagnets, a valve included in the diagonal of a bridge formed by moving and fixed contacts are complex and not reliable enough.

Описываемое устройство свободно от указанных недостатков благодар тому, что сердечники упом нутых пол ризованных электромагнитов снабжены последовательно соединенными катушками, подключенными к выводам диагонали моста, а в цепь катушек включен регулируемый резистор.The described device is free of the indicated drawbacks due to the fact that the cores of the mentioned polarized electromagnets are equipped with series-connected coils connected to the pins of the diagonal of the bridge, and an adjustable resistor is included in the coil circuit.

На чертеже изображено предлагаемое устройство .The drawing shows the proposed device.

На основании 1 неподвижно закреплены два пол ризованных электромагнита 2, 3. В каждом окне магнитопровода намотаны по две катушки 4, 5 и 6, 7. Катушки 5 и 6 могут быть намотаны и на магнитопроводы 2 -и 3, причем Катушка 4 соединена последовательно с катушкой 7, а катушка 5 соединена последовательно с катушкой 6.On the base 1, two polarized electromagnet 2, 3 are fixedly fixed. Two coils 4, 5 and 6, 7 are wound in each window of the magnetic circuit. Coils 5 and 6 can also be wound on magnetic circuits 2 - 3, and Coil 4 is connected in series coil 7, and the coil 5 is connected in series with the coil 6.

Удерживание корей 8, 9 во включенном состо нии электромагнитов осуш;ествл етс с помощью посто нных магнитов 10, 11. Якори 8 и 9 могут свободно поворачиватьс на ос х 12Keeping the koreas 8, 9 in the switched on state of electromagnets is dried; it is used with the help of permanent magnets 10, 11. Anchors 8 and 9 can rotate freely on axes 12

и 13, причем пружины 14, 15 стрем тс оторвать кори от магнитопроводов. Перемещение корей ограничиваетс упорами 16, 17. На каждом коре имеетс по два жестко закрепленных контакта, которые вл ютс подвижными . Во включенном состо нии они соприкасаютс с неподвижными контактами, причем контакты замыкаютс следующим образом: 18 и 19, 20 и 21, 22 и 23, 24 и 25. Шунтирующий диод 26 включен в диагональ моста, образованного выщеуказанными контактами. Включенные последовательно катущки 5 и 6 подсоединены параллельно шунтирующему диоду 26, причем последовательно с нимиand 13, with the springs 14, 15 tending to remove the measles from the magnetic cores. The movement of the koreas is limited by the stops 16, 17. On each bark there are two rigidly fixed contacts that are movable. In the on state, they are in contact with fixed contacts, and the contacts are closed as follows: 18 and 19, 20 and 21, 22 and 23, 24 and 25. The bypass diode 26 is included in the diagonal of the bridge formed by the indicated contacts. The coils 5 and 6 connected in series are connected in parallel to the shunt diode 26, and in series with them

включен регулИ|руемый резистор 27. Включенные последовательно катущки 4, 7 подключены ко вторичной обмотке трансформатора тока 28. Катущки 4, 7 защунтированы регулируемым резистором 29, и последовательно сan adjustable resistor is turned on. 27. The coils 4, 7 connected in series are connected to the current transformer secondary winding 28. The coils 4, 7 are ground by an adjustable resistor 29, and in series with

ним включена кнопка 30.The button 30 is on.

Выводные зажимы 31 и 32 устройства включаютс в разрыв провода, идущего от источника питани к нагрузке. На магнитопроводах пол ризованных электромагнитов размещеныThe output terminals 31 and 32 of the device are included in the wire break from the power source to the load. On the magnetic cores of polarized electromagnets are placed

катушки 33, 34.coils 33, 34.

Claims

Automatic shutdown of the device occurs in the following sequence. Let at a given time the current has a direction from clamp 31 to clamp 32. The coils 4, 7 are turned on so that for a given direction and magnitude of the current measles 8 node, the action of the spring 14 begins to turn towards the stop 16. Therefore, contacts 18, 19 are open. and 20, 21. However, the arcs on these contacts do not work, since the current will go from terminal 5 through contacts 25, 24, bypass diode 26, contacts 22, 23 to terminal 32. When the polarity is reversed, the voltage in the specified circuit disappears as the diode closes and a reverse voltage appears on it. Coils 5 and 6 will begin to flow current. The beginning and the ends of these coils are turned on so that one of them (6) creates demagnetizing amp-turns in the magnetic core 3, as a result of which the measles 9 under the action of the spring 15 and 15 begin to turn towards the stop 17. Contacts 22, 23 and 24, 25 open. Since the pins 22, 23 and 24, 25 break the current equal to the sum of the reverse current of the diode 26 and the current flowing through the coils 5, 6 and the resistor 20 27, an electrical arc does not appear on them. If a trip occurs at a time when current flows from clamp 32 to clamp 31, the electromagnets act in reverse order.25 To quickly turn off the device, there is a button 30 that, when pressed, clears coils 4, 7 to turn on the device voltage to coils 34 and 33. In the absence of current in the main circuit, a voltage of opposite polarity must be applied to the coils to disconnect the device. Apparatus for arcing-free AC power circuits containing polarized electromagnets, a valve included in a diagonal of a bridge formed by moving and stationary contacts, characterized in that, in order to simplify and increase the reliability of the device, the cores of polarized electromagnets are equipped with coils connected to the pins of the bridge diagonal, and an adjustable resistor is included in the coil circuit.

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