Unidirectional direct-current contactor

FIELD: electricity.

SUBSTANCE: invention is referred to unidirectional direct-current contactor with double disconnection having two contact pads, each pad is equipped with one fixed contact and one movable contact, at that the movable contacts are placed at a jumper and at disconnection of the contact pads a switching electric arc is formed at each of them, and an electric arc quencher and a displacing device for displacement of at least one switching electric arc from the respective contact pad. The shunting guard is placed close to the movable contact of the first contact pad; the jumper and the shunting guard are insulated from each other; the shunting guard is connected by potential to the fixed contact of the second contact pad so that at the first contact pad by displacement made by the displacing device the first switching electric arc jumps from the jumper to the shunting guard.

EFFECT: providing small dimensions and low costs for manufacturing of the device.

10 cl, 1 dwg

 

The present invention relates to unidirectional including contactor DC with double-break, containing two contact areas, which have one fixed contact and one movable contact and movable contacts are in contact with the jumper, and when opened, places the contact at each of them is formed of switching the electric arc, and contains the device extinguish the arc and the displacing device for displacing at least one of an electric arc from the corresponding contact location.

Such unidirectional including DC contactors are used, for example, on the railroad for switching DC with rated voltage up to 3 kV.

Contactor with double-break is known, for example, from DE 1 246 851. In this paper, we show the switching device DC with multiple opening, for example, contains the contacts in the form of jumpers. For each place of contact of the switching devices of direct current connected device extinguish the arc containing diiodotyrosine shields. In addition, in the switching devices of the DC provided by permanent magnets, which displace the formed switching an electric arc device damping the system is in transition arc. Each contact device attached extinguish the arc, this contactor is relatively much space.

Therefore, the present invention is the creation of a unidirectional main contactors DC, which is compact and requires a small cost to manufacture. For this purpose according to the invention provides that adjacent to the movable contact of the first contact location is shunt plate, with the jumper and shunt shield electrically isolated from each other, and the bypass flap is connected to capacity with a fixed contact of the second contact areas, so that the first switching electric arc first place of contact by displacement by means of the displacing device jumps from the contact of the jumper shunt on the flap, and thus shunted second switching an electrical arc on the second contact.

Thus, the contactor DC according to the invention has a very simple implementation. Since the second switching an electrical arc on the second contact is shunted when skipping the first switching electric arc contact with the jumper shunt on the flap, it is a simple way extinguished. Therefore, only the first switchboard is operating an electric arc, which by the displacing device is displaced in the device extinguish the arc and there is extinguished. So it should be created only one device extinguish the arc. Because of this contactor DC has the desired compactness and low cost to manufacture.

According to a preferred implementation variant of the invention the device extinguish the arc may be located adjacent to the first site of contact. Therefore, occur at the first contact of the first switching electric arc must pass only a small path to the device extinguish the arc and therefore quickly extinguished. Thus it is possible to avoid damage of the contact material in the contactor as a result of burning.

To provide a very simple implementation of the contactor DC can be provided that the jumper and shunt plate are separated from each other by an air gap.

In another variant implementation of the invention can be provided that the bypass flap is made as a guide shield the arc and at least partially surrounds the area of the edge device extinguish the arc. So one of the points of the base of the first switching arc is this aiming the mu Board of the electric arc along the device extinguish the arc. Consequently, the first switching an electrical arc is stretched and displaced along its length in the device extinguish the arc. This ensures fast and reliable damping of the remaining first switching of the electric arc, and the contactor DC has good damping function.

In addition, can also be provided that the fixed contact of the first contact areas connected with the second guide plate of an electric arc. Preferably, the fixed contact is only lengthened and, thus, made as one piece with the guide plate of an electric arc. Consequently, the second point of the first switching arc is also conducted along the device extinguish the arc, which provides additional stretch and, thus, reliable damping of the first switching of the electric arc. Preferably the second guide plate of the electric arc also surrounds the region of the edge device extinguish the arc.

In one embodiment, may be provided that in the region of the second contact location is the protective lining. Because of this protected environment of the second contact location, at that time, while the second switching an electrical arc is in this place of contact and still no device is activated is by leapfrogging the first switching of the electric arc on the bypass flap. Mainly, it can be provided that the protective lining made of wear-resistant ceramics. But it can also be applied separately suspended metallic element, for example, stainless steel.

The transition from one point at the base of the first switching of the electric arc on the first place of contact with the contact jumper shunt plate can be facilitated by the fact that the jumper on its end facing the shunt plate, bent in the direction of the shunt plate.

Mainly the displacing device is turned on from the contact side of the contact bridges behind her bent end. Because of this provided the opportunity for a good protection of the displacing device.

In order to achieve a simple construction of the contactor DC, may additionally be provided that the contactor DC is surrounded by a casing, which is made from double-shell technology.

According to another implementation variant, it can be provided that the housing of the field device extinguish the arc has a removable insert, which is connected with located in this area arc quenching device elements extinguish the arc. The insert together with the damping element when the second arc can be removed in a simple way and thus provide access to the places of contact of the contactor, for example, for maintenance purposes.

Hereinafter the invention is explained in more details with reference to the drawings. Pictured: Fig.1 - the design of the contactor DC in the perspective image.

As shown in Fig.1, the contactor 1 DC has a double opening and contains two seats 2, 3 contact. Each of the seats 2, 3 contains contact the fixed contact 4, 6 and the movable contact 5, 7. The movable contacts 5, 7 are located on a common pin of the jumper 8. The jumper 8 is installed on a movable holder 9 contacts and by means of drive mechanisms attached to the holder 9 contacts, it can be moved from a closed position in which the fixed contacts 4, 6 and movable contacts 5, 7 each designated 2, 3 contact in contact with each other, in the open position, in which the fixed contacts 4, 6 and movable contacts 5, 7 2, 3 contact are separated from each other.

The fixed contact 4 first place 2 pins located on the first contact of the tire 10. To contact the tire 10 made the first main contact of the connecting element 11 of the contactor 1 DC. The fixed contact 6 second place 3 contact located on the second contact of the tire 12. On this second bus 12 is the second main contact of the connecting element 13.

Related is about the first place 2 pins are device 14 extinguish the arc. The device 14 extinguish the arc includes items 23 extinguish the arc on which the electric arc is formed at the opening of the places 2, 3 contact, stretched and extinguished. The damping elements of the electric arc can be, for example, made of ceramics or metal. The bottom edge of the device 14 extinguish the arc drawn to the first place 2 pins. Facing toward the device 14 extinguish the arc end region 15 of the contact bridges 8 are deflected. Away from this bent end region 15 of the contact bridges 8 is a shunt plate. The bypass flap is made in the form of the first guide plate 16 of the electric arc. The first guide plate 16 of the electric arc is made L-shaped and surrounds his long side partial region of the lower edge device 14 extinguish the arc, and its short side of the corresponding side of the device 14 extinguish the arc. Located on the bottom side of the device 14 extinguish the arc side of the guide plate 16 of the electric arc has such a length that the open state of the contact bridges 8, it is opposite the bent end region 15 of the contact bridges 8, however, does not act in open place 2 pins.

The jumper 8 lane and the first guide plate 16 of the electric arc are electrically isolated from each other. For this purpose between the bent end 15 of the contact bridges 8 and the guide plate of the electric arc is made air gap 22. Made in the form of the first guide plate 16 of the electric arc shunt plate is connected to capacity with a fixed contact 6 second place 3 contact. For this purpose between the guide plate 16 of the electric arc and the contact bus 12, which is stationary contact 6 second place 3 contact, connecting lived 17. Preferably connective lived 17 are provided with insulation. Of course, it is also possible another connection, which ensured that the guide plate 16 of the electric arc and the second contact bus 12 have the same potential. In the region of the second space 3 contact is the protective lining 21. The protective lining 21 serves to protect situated in the region of the second space 3 contact elements of the contactor from the second switching an electric arc formed on the second contact when it is opened. In particular, you should avoid contact with the parts connected to the earth. The protective lining 21 may be made of wear-resistant ceramics. Can also be used separately suspended metal element, preferably made of stainless steel or other durable metal.

On facing away from places 2, 3 contact side of the contact bridges 8 are displacing device. In the shown embodiment is a permanent magnet 18. To the permanent magnet 18 attached pole plate 19. In Fig.1 contactor 1 DC shown in open condition. This means that over the permanent magnet 18 is an additional pole plate which is not shown and which overlaps the designated contact. Pole plate 19 made grebneobraznye, but they may also have a different shape. Starting from the permanent magnet 18, the pole plates 19 extend up and block the first place 2 pins, as well as at least a partial region of the device 14 extinguish the arc. In the opposite direction of the pole plates 19 are narrowed like a stalk and cover only the second place 3 contact. Homogeneous displacement field created by the pole plates 19 in 2 places, 3 contact, and in the field device 14 extinguish the arc. Thus the permanent magnet 18 is oriented in such a way that it actuates the switching on of the electric arc generated when switching on the seats 2, 3 contact, the Lorentz force, which displaces the first switching an electric arc generated in the first place 2 pins in the direction of the device 14 Gal which of the electric arc. Switching the electric arc formed on the second place 3 contact is displaced in the opposite direction. Can be also ensured the implementation of the pole plates so that they overlap, only the first contact and the device extinguish the arc, and do not overlap the second contact.

The first contact of the tire 10, which is the fixed contact 4 first place 2 pins, elongated in the direction of the device 14 extinguish the arc, which is formed of the second guide plate 20 of the electric arc. The second guide plate 20 of the electric arc also surrounds a partial area of the lower side of the device 14 extinguish the arc and passes upward in the direction of the side of the device 14 extinguish the arc, opposite to the first guiding plate 16 of the electric arc.

Preferably the contactor 1 DC laid Kapitonova film, which separates the conductor elements from elements connected to the earth.

In Fig.1 shows only the internal design of the contactor 1 DC. This internal structure is surrounded by a housing. The case is made for the double shell technology. Contactor 1 has a very simple design, providing for the possibility of low cost to manufacture. As it is odimo perform only one device to extinguish the arc, the contactor 1 a constant current can be made very compact.

On facing away from places 2, 3, the contact area of the edge device 14 extinguish the arc in the housing is removable insert 24. The insert 24 overlaps only a partial region of the device 14 extinguish the arc. Located in this partial field items 23 extinguish the arc connected to the insert 24, for example glued or applied by spraying. The insert 24 is connected to the housing, for example, using clipsbig connection, and can therefore be removed in a simple way. Because the elements 23 extinguish the arc connected in this area with the insert, they are removed along with it. Because of this provided access to sites 2, 3 contact and to contact the tires 10, 12, for example, for maintenance purposes.

Next, using Fig.1 more explains the principle of operation of the contactor 1 DC.

The jumper 8 is moved by drive mechanisms (not shown) contactor 1 DC and through the holder 9 contacts. Thus, the jumper 8 can be moved from a closed position in which the seat 2, 3 contact closed, and the fixed contacts 4, 6 and movable contacts 5, 7 both contact points are in contact, in time, the mentioned position. In the open position of the fixed contact 4 and the movable contact 5 of the first 2 places of contact and the fixed contact 6 as well as the movable contact 7 of the second space 3 contact are separated from each other by an air gap. Of course, the jumper 8 may return from the open position to the closed position. When opened, places 2, 3 contact at both locations 2, 3 contact between the fixed contacts 4, 6 and movable contacts 5, 7 are formed of switching arc.

To avoid damage to the contactor 1 DC, these switching of the electric arc must be quickly repaid. Due to the use of the permanent magnet 18 and the respective pole plates 19 on the first switching an electric arc in the first place 2 pins affects the Lorentz force, which displaces the first switching an electric arc in the direction of the device 14 extinguish the arc. By means of the Lorentz force second switching an electrical arc in the second place 3 contact also displaced from 3 contact and stretched. However, this is not absolutely necessary.

Since the direction of the current of the second switching arc in second place 3 contact opposite to the direction of current of the first switching arc in the first place 2 is ontact, the second switching an electrical arc in Fig.1 is displaced downward. Therefore, in order to avoid damage to the contactor 1 DC, in the region of the second space 3 contact is the protective lining 21. The protective lining 21 is preferably located between the second place 3 contact and the connecting housing 17 in order to protect the connecting conductor 17 from the second switching arc.

As already described, by means of a permanent magnet 18 and installed pole plates 19 of the first switching an electrical arc in the first place 2 pins is displaced upwards, i.e. in the direction of the device 14 extinguish the arc. While the right point of the base of the first switching an electric arc jumps from the contact bridges 8 on the guide plate 16 of the electric arc.

As a consequence, the current flow in the contactor 1 DC is only from the first main contact of the connecting element 11 through the first switching an electric arc on the guide plate 16 of the electric arc and through the connecting conductor 17 to the second main contact of the connecting element 13. Due to this, the second switching an electrical arc, which is formed on the second place 3 contact shunted and thus extinguished. Through the permanent magnet 18 and the pole plates 19 of the first switching an electrical arc is displaced further in the direction of the device 14 extinguish the arc. The point at the base of this first switching electric arc moving along the guide plates 16, 20 of the electric arc. Due to this, the first switching electric arc expands, it displaces in the device 14 extinguish the arc and there is extinguished.

1. Unidirectional including contactor (1) DC double-break, containing two places (2, 3) contact, which have one fixed contact (4, 6) and one movable contact (5, 7), while the movable contacts (5, 7) are located on the contact jumper (8), and the open spaces (2, 3) contact on each of them is formed of switching the electric arc, and contains a device (14) extinguish the arc and the displacing device (18, 19) to displace at least one of the switching of the electric arc from the appropriate place (2, 3) contact,
characterized in that
adjacent to the movable contact (5) first place (2) contact is a shunt plate (16) with the jumper (8) and clamp plate (16) are electrically isolated from each other, and the bypass flap (16) is connected to capacity with a fixed contact (6) second place (3) contact, so that the first switching electric arc first place (2) contact due to displacement by means of the displacing device (18, 19) paraskaki the AET with contact bridges (8) on the bypass flap (16) and as a consequence shunted second switching an electrical arc in the second place (3) of the contact.

2. Contactor DC under item 1, characterized in that the device (14) arc quenching is located adjacent to the first location (2) of the contact.

3. Contactor DC under item 1 or 2, characterized in that the jumper (8) and clamp plate (16) are separated from each other by an air gap (22).

4. Contactor DC under item 1 or 2, characterized in that the bypass flap is made in the form of a guide plate (16) of the electric arc and at least partially surrounds the area of the edge device (14) extinguish the arc.

5. Contactor DC under item 1 or 2, characterized in that the fixed contact (4) first place (2) contact is connected with the second guide plate (20) of the electric arc.

6. The contactor under item 1 or 2, characterized in that in the region of the second space (3) contact is a protective casing (21).

7. Contactor DC under item 1 or 2, characterized in that the jumper (8) at its end (15) facing the clamp plate (16), deflected in the direction of the shunt plate (16).

8. Contactor DC under item 7, characterized in that the displacing device (18) is turned on from (2, 3) contact side of the contact bridges (8), behind her bent end (15).

9. Contactor DC under item 1 or 2, characterized in that it is surrounded by what obosom.

10. Contactor DC under item 9, characterized in that the field device (14) arc quenching the housing has a removable insert (24), which is connected with located in this area arc suppression elements (23) of the device (14) extinguish the arc.



 

Same patents:

Low-voltage switch // 2505876

FIELD: electricity.

SUBSTANCE: low-voltage switch has a housing which holds at least one fixed contact and a movable contact which is engaged and disengaged with the fixed contact, a drive mechanism operably connected to the movable contact, at least first and second terminals electrically connected to the fixed contact and the movable contact, respectively, and an arc chamber placed between the fixed contact and a conducting element, having a first end which is electrically connected to the second terminal and a second end which ends with the lower side. The arc chamber has multiple moulded conducting plates which are inserted between the fixed contact and the second end of the conducting element, and a main part having a second insulating housing which holds an element made of ferromagnetic material. The main part is placed adjacent to the multiple moulded conducting plates and defines the space for passage of the movable contact as it moves between the closed position and the open position.

EFFECT: making a switch which, with a relatively simple design, provides highly effective cutting of overload current owing to sufficient rate of opening and control of the electric arc.

11 cl, 4 dwg

Switching device // 2502147

FIELD: radio engineering, communication.

SUBSTANCE: switching device has at least one input terminal and at least one output terminal (3) for connecting electric conductors, as well as a first switching contact and a second switching contact. The switching contacts in the closed position close the current circuit between the input terminal and the output terminal (3). A circuit breaker is provided for opening the first switching contact and the second switching contact. In the zone of the switching contacts, there is at least one arc-extinguishing chamber (9) which holds a given number of metal plates (10). In order to achieve high reliability and safety during operation even after repeated disconnection, the invention proposes adjoining at least two metal plates (10) through separate areas.

EFFECT: high reliability and safety of operation.

12 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: arc-extinguishing system includes movable contact, fixed contact and insulating housing. Insulating housing is made in the form of hollow pipe with slots made on inner surface and located at intervals along the whole housing. Metal magnetic inserts are located in each slot, and magnetic blow device for creation of longitudinal magnetic field is installed on fixed contact.

EFFECT: increasing the drop of voltage on the arc, increasing heat release from electric arc to the environment owing to its being rotated between slots of the housing, and decreasing the influence of exhaust gases on inner surface of the housing.

2 dwg

FIELD: electricity.

SUBSTANCE: arc-extinguishing system includes movable contact, fixed contact and insulating housing. Insulating housing is made in the form of hollow pipe with slots made on inner surface and located at intervals along the whole housing. Metal magnetic inserts are located in each slot, and magnetic blow device for creation of longitudinal magnetic field is installed on fixed contact.

EFFECT: increasing the drop of voltage on the arc, increasing heat release from electric arc to the environment owing to its being rotated between slots of the housing, and decreasing the influence of exhaust gases on inner surface of the housing.

2 dwg

Switching device // 2502147

FIELD: radio engineering, communication.

SUBSTANCE: switching device has at least one input terminal and at least one output terminal (3) for connecting electric conductors, as well as a first switching contact and a second switching contact. The switching contacts in the closed position close the current circuit between the input terminal and the output terminal (3). A circuit breaker is provided for opening the first switching contact and the second switching contact. In the zone of the switching contacts, there is at least one arc-extinguishing chamber (9) which holds a given number of metal plates (10). In order to achieve high reliability and safety during operation even after repeated disconnection, the invention proposes adjoining at least two metal plates (10) through separate areas.

EFFECT: high reliability and safety of operation.

12 cl, 2 dwg

Low-voltage switch // 2505876

FIELD: electricity.

SUBSTANCE: low-voltage switch has a housing which holds at least one fixed contact and a movable contact which is engaged and disengaged with the fixed contact, a drive mechanism operably connected to the movable contact, at least first and second terminals electrically connected to the fixed contact and the movable contact, respectively, and an arc chamber placed between the fixed contact and a conducting element, having a first end which is electrically connected to the second terminal and a second end which ends with the lower side. The arc chamber has multiple moulded conducting plates which are inserted between the fixed contact and the second end of the conducting element, and a main part having a second insulating housing which holds an element made of ferromagnetic material. The main part is placed adjacent to the multiple moulded conducting plates and defines the space for passage of the movable contact as it moves between the closed position and the open position.

EFFECT: making a switch which, with a relatively simple design, provides highly effective cutting of overload current owing to sufficient rate of opening and control of the electric arc.

11 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention is referred to unidirectional direct-current contactor with double disconnection having two contact pads, each pad is equipped with one fixed contact and one movable contact, at that the movable contacts are placed at a jumper and at disconnection of the contact pads a switching electric arc is formed at each of them, and an electric arc quencher and a displacing device for displacement of at least one switching electric arc from the respective contact pad. The shunting guard is placed close to the movable contact of the first contact pad; the jumper and the shunting guard are insulated from each other; the shunting guard is connected by potential to the fixed contact of the second contact pad so that at the first contact pad by displacement made by the displacing device the first switching electric arc jumps from the jumper to the shunting guard.

EFFECT: providing small dimensions and low costs for manufacturing of the device.

10 cl, 1 dwg

Switching system // 2570169

FIELD: electricity.

SUBSTANCE: invention is related to switching system (1) for relays or contactor switch, which is comprised of a contact bridge (5) placed between two contacts (4a, 4b) so that it can rotate around the axis (6). Besides, the switching system (1) comprises a magnet element (15) that generates magnetic filed (28) parallel to the rotation axis (6) of the contact bridge (5) in order to force out electric arc occurring at open contacts (4a, 4b) to arc-quenching chamber (16).

EFFECT: improved efficiency of the switching system at voltage of 450 V and at passage and interruption of current of 250 A.

12 cl, 5 dwg

Switching device // 2599384

FIELD: electrical engineering.

SUBSTANCE: invention relates to low-voltage switching device (1) containing multiple arc-quenching chambers (10). Each of said arc-quenching chambers (10) covers unit (60) of contacts closure, comprising fixed contact (30, 30′) and movable contact (20), and arches are formed when movable contact is detached from fixed contact. Each arc-quenching chamber comprises multiple U-shaped arc-quenching plates (40), adapted for arc separation, direction and cooling, formed between contacts (30, 30′, 20), and side walls (12), containing guide device (14) for directing branches (42) of arc-quenching plates. Guide device (14) contains multiple supporting plates (16), arranged to extend to inner part of arc-quenching chamber for receiving branches (42) of arc-quenching plates and to ensure electrical insulation between two adjacent arc-quenching plates (40).

EFFECT: technical result is creation of low-voltage switching device, made with possibility to direct arc-quenching plates in arc-extinguishing chamber with prevention of damage of branches of arc-quenching plates, caused by arcs.

3 cl, 3 dwg

Up!