CN201327781Y

CN201327781Y - Circuit breaker

Info

Publication number: CN201327781Y
Application number: CNU2007201504542U
Authority: CN
Inventors: H·帕拉多; S·马丁; H·辿富尔
Original assignee: Secheron SA
Current assignee: Secheron SA
Priority date: 2007-03-30
Filing date: 2007-03-30
Publication date: 2009-10-14
Anticipated expiration: 2017-03-30

Abstract

A circuit breaker allows the establishment and the cut-off of the current. The circuit breaker comprises a current cut-off device provided with at least one movable contact (20) in contact with and separate from a fixed contact (24), and an arc quenching chamber (12) arranged on the current cut-off device (11), wherein, the arc quenching chamber (12) is used for quenching arcs generated in the separation of the movable contact and the fixed contact. The utility model is characterized in that the circuit breaker comprises a protective box body (50), wherein, the circuit breaker is mounted in the box body; the box body comprises a base element (51), and an upper element capable of being dismounted and fixed; the cut-off device (11) is mounted in the base element (51), the arc quenching chamber (12) is mounted in the upper element (52) so as to enable the arc-quenching chamber to be suitable for the cut-off device (11), so that the arcs are quenched when two elements (51, 32) are assembled with each other.

Description

Circuit breaker

Technical field

The utility model relates to a kind of circuit breaker, allow to set up and cut off electric current, comprise failure of current device with at least one movable contact and arc control device, this movable contact can contact with fixed contact and with this fixed contact at interval, these arc control device are positioned at the top of this failure of current device and are used for extinguish arcs when separation movable contact and fixed contact.

Background technology

Some such circuit breakers are in being usually used in railway locomotive or be used for energy supply station.When disconnecting electric arc, these circuit breakers have produced in a large number for all and have been arranged in the Ionized gas that the element of the environment space of relative extension has illeffects and corrosiveness.In addition, the formation of arc energy need be provided with around this circuit breaker bigger isolation and safe distance.

Summary of the invention

The utility model is intended to overcome above-mentioned defective.

For this reason; the utility model proposes a kind of circuit breaker; allow to set up and cut off electric current; this circuit breaker comprises that having at least one can contact fixed contact and the failure of current device of the current collector that separates with this fixed contact; with the arc control device that are arranged on above this electric current point of contact device (11), these arc control device are used to extinguish the electric arc that forms when separately this moves with fixed contact, it is characterized in that; this circuit breaker comprises the protection box body, and this circuit breaker has been installed in this box body.This box body comprises seat element and detachable stacked fixing last element, and this shearing device is installed in the seat element and these arc control device are installed on this in element so that arc control device are suitable for shearing device, thus when two elements fit together extinguish arcs.

Based on above-mentioned feature, a kind of permission effective limit ionization gas and remarkable reduction when breaking arc have been obtained around the circuit breaker of the isolation distance of circuit breaker.The protection box body allowed this circuit breaker reduce take up room and (shielding) (dwindled this circuit breaker take up room and provide fully isolate) be provided completely, therefore increased fail safe, can install simply simultaneously, dismantle, control this circuit breaker.

Best, this protection box body comprises the material of shielding, fire prevention and waterproof and dust protection.

Described material is polyvinyl ester preferably.Above-mentioned feature has guaranteed great safety in utilization.

Best, element is closed downwards at least in part by fixation wall on this, and described fixation wall comprises that some are used for the opening that air circulation and electric arc pass through to arc control device from two contacts.

Therefore the performance of electric current disconnection and arc cutting is separated, thereby this circuit breaker has had reliable service behaviour and long useful life.

Should go up the valve that element has preferably been equipped flexible composite material, this valve is fixed on the outer wall of element by the biasing device, and described valve is provided for flexibly cramming opening, and the gas that produces owing to pressure when allowing extinguish arcs is discharged.

The shielding of guaranteeing the optimization of this circuit breaker can be avoided the overvoltage of box body inside.

According to a favourable distortion, two elements of protection box body are hinged each other along the jointed shaft on one of side that is positioned at the protection box body, and last element can be lifted by the pivot around described jointed shaft and separate with seat element.

Above-mentioned feature allows to obtain circuit breaker is operated very easily and moved.

Description of drawings

Other advantage will draw by the following detailed specification that discloses by accompanying drawing, the exemplary and indefiniteness of described accompanying drawing fund an embodiment and distortion will be shown, and accompanying drawing comprises:

Fig. 1 is the perspective view of the embodiment of the circuit breaker in the protection box body;

Fig. 2 has described the longitudinal cross-section of the circuit breaker of Fig. 1;

Fig. 3 is the viewgraph of cross-section diagram;

Fig. 4 is the cross section of two dividing elements of box body;

Fig. 5 is the cutaway view of specific part;

Fig. 6 is the viewgraph of cross-section diagram of a distortion;

Fig. 7 is another hair style distortion.

Embodiment

Circuit breaker shown in Fig. 1-5 allows the electric current in foundation and the cut-out circuit.With reference to Fig. 2, comprise electric current point of contact device 11, this device 11 is equipped with arc control device 12 strictly speaking in the above, and these arc control device 12 are used to extinguish the snuff member of the electric arc that forms when cutting off electric current.

Failure of current device 11 has shielding frame 14, and preferably this shielding frame is the polymeric material that glass fibre is strengthened.Main current circuit comprises lower connecting rod 16 and upper connecting rod 17, and two all connecting rods link to each other with the cable of main circuit.

This lower connecting rod 16 is connected with first jiao of 18 electric current by pillar, and upper connecting rod 17 is fixed and is connected with second jiao of 19 electric current.

Knife-edge movable contact 21 is pivoted on the lower connecting rod 16 by the articulated mounting 22 of cylinder type, and this lower connecting rod is used for supporting.Described articulated mounting 22 comprises the cylinder ledge that is arranged on the semi-circular cross-section on this cutter 21, in a groove that is arranged on correspondingly-shaped on the bar 16 and cross section by the pull bar effect.

When the main contact 25 of closure, this movable contact 20 is used for cooperating with fixed contact 24, and this fixed contact is positioned on the upper connecting rod 17.

Fig. 2 shows the circuit breaker at open position, and this movable contact 20 departs from fixed contact 24.After the main contact 25 of closure, movable contact and fixed

contact

20,24 contact with each other.

One starting drive 27 is set, is used for moving this cutter 21 and is used to keep removable and fixed

contact

20,24 is one group.This starting drive 27 comprises the electromagnet 28 that is used for drive controlling bar 29, allow to move this cutter 21, so that closed and open main contact.

This circuit breaker also comprises starting drive 30, and this starting drive 30 is provided for when stoping when overcurrent or circuit main contact 25 to disconnect in the main circuit 15.Therefore this starting drive comprises shelf 33 that surrounds this lower connecting rod 16 and the mobile core 34 that allows to act on by lever 35 control lever 29.When the excessive maximum controlling value that exceeds electric current of the electric current in the main circuit, mobile core 34 is lifted and is made lever 35 swings slightly, and this moment, this lever 35 was thrown off control lever 29 and cutter 21.

This cutter 21 is returned to its open position then under the effect that is installed in the returning spring on the pull bar 23.

Replacedly, this main contact 25 can also be carried out the rollback motion and is opened according to the suitable control signal of opening that starting drive 27 provides by control lever 29.

This circuit breaker also comprises one group of auxiliary contact 37, and they are closed with main contact according to control lever 38 or are opened, and described control lever 38 is connected the lower part of pull bar 23 with auxiliary contact 37.

Arc control device 12 comprise, 20 ferromagnetic cut-out plates 40 for example, and they are used for isolating and extinguish arcs by stacked, and described electric arc is between two

angles

18,19 that produce and get back to when opening main contact 25 in the central space 41 of arc control device 12.These arc control device 12 also have the plate 42 of deionization of the plastic material of respective numbers, and described plastic material allows to weaken the ionized gas that electric arc forms.

According to the utility model, this circuit breaker has protection box body 50, and this protection box body 50 comprises seat element 51 and last element 52.This failure of current device 11 is installed in the seat element 51, and these arc control device 12 are fixed in the element 52 so that these arc control device are suitable for shearing device 11, and therefore this shearing device 11 allows extinguish arcs when two

elements

11,12 of box body are assembled each other.The assembling of two elements is worked by 4 fixed screws 54 (Fig. 1).

This protection box body comprises lower surface 55 with reference to Fig. 1, upper surface 56, two side surfaces 57,58, front surface 59 and rear surface 80.Two

elements

51 and 52 are assembled along horizontal mid-plane.

Therefore the wall of seat element 51 and last element 52 comprises lower and upper

flanged edge

61,62, is used to be fitted to each other.Described 4 fixed screws 54 pass the

flange

61,62 with 4 angles, so that keep two elements of box body.

This protection box body is made of material shielding, waterproof and dust protection.Therefore polyvinyl ester during preferable material.

Seat element 51 has the shape and size of the outline that is suitable for shearing device.The shape and size that should go up element 52 are suitable for the outline of arc control device 12.Therefore the internal volume of this box body is optimized for reality is used circuit breaker, has advantageously reduced always to take up room.

This seat element 51 has some following grooves that are used to discharge the water that condenses.

Should go up center fixed wall 63 on element 52 is installed in element by screw 64 the edge towards base section ground closure.This wall 63 is equipped with the opening 65,66 (Fig. 2) that allows air circulation.These openings are arranged in and obtain the well distributed of pressure when cutting off electric current.This center fixed wall also comprises and is controlled between fixed contact and the

movable contact

20,24 middle opening 67 that the electric arc that forms passes through towards arc control device 12.The edge of described middle opening 67 is two extensions 68; 69 (Fig. 3; 4), described two extensions have arranged that two sides of fixing and current collector are so that as the lateral protection element, this lateral protection element avoids the component exposure of shearing device 11 in arcing.

Last element 52 also is equipped with 4 valves 70, the pressed gas that forms when being used to guarantee to discharge extinguish arcs.Described valve 70 is formed by the plate 71 of the isolation synthetic material on the outer wall 72 that is installed in element 52, and described plate 71 has covered the opening 73 (Fig. 5) that is provided with in this wall 72 at resting guard.Be held against this wall 72 by the top edge that is tightened on the biasing device 74 described plates 71 on this wall 72.When overvoltage occurring in box body 50, described plate and described wall 72 are thrown off, and shown in Fig. 5 dotted line, therefore allow to discharge gas.

By 6 screws 77, these arc control device 12 are installed in the element 52.Described shearing device 11 remains on (Fig. 3,4) in this seat element 11 by screw 78.

Lower connecting rod and upper connecting

rod

16,17 by

connector

80 and 81 and

lug plate

83 and 84 be connected on the cable of main circuit.Described cable passes down the wall of element 51 subsequently by the extruding filler.

Described auxiliary contact 37 link to each other with fixed connector 87 by cable 86 (Fig. 2), and this fixed connector 87 is used for cooperating with outside removable connector.

Protection box body 50 is used for hanging being installed in below the locomotive or placing and is installed in this locomotive roof.Described installation realizes by installation frame that generally installation frame and flanged

edge

61,62 cooperate.

For the ease of to its control, this protection box body 50 has been equipped handle 88 on two apparent surfaces.Described handle preferably is installed in (Fig. 1) on the element 52.

According to distortion shown in Figure 6, the jointed shaft 90 on one of 51,52 sides that are positioned at box body 50 of two elements of protection box body 50 is hinged each other.Should go up element 52 therefore can be lifted by the pivot around jointed shaft and setover with this seat element.Be fixed on the motion that closure member 91 on the relative wall of wall of jointed shaft 80 allows closed these box bodys and is convenient to carry out element 52.

With reference to Fig. 7, the last element 52a in distortion can have bigger height so that can hold arc control device 12, and these arc control device 12 have some bigger cut-out plates.The circuit breaker of this distortion can be provided for cutting off the electric current under the big voltage.

Certain described embodiment is not determinate, and they can receive any distortion, only otherwise exceed the protection range of claim 1.Especially, this protection box body can have any shape that is suitable for the element of circuit breaker.The connection of cable can be implemented with different modes.The structure of shearing device and arc control device can differently be implemented.

Help on the temperature of ozone gas diffusion, simultaneously, the state of regulating the treatment fluid that pumps from circulating

pump

17,17 is the reactiveness the regulating tank easily just.

Although below in conjunction with the accompanying drawings the utility model preferred embodiment has been done to prove absolutely, should point out that those of ordinary skills obviously can make all changes and correction.These changes and only revise otherwise deviate from the utility model scope and just should regard as and be included in the claimed scope of the utility model.

Claims

1. circuit breaker; allow to set up and cut off electric current; this circuit breaker comprises that having at least one can contact fixed contact (24) and the failure of current device (11) of the current collector (20) that separates with this fixed contact; with the arc control device (12) that are arranged on above this electric current point of contact device (11); these arc control device (12) are used to extinguish the electric arc that forms when separately this moves with fixed contact; it is characterized in that; comprise protection box body (50); this circuit breaker wherein has been installed; this box body comprises seat element (51) and detachable last element (52) fixed to one another; this shearing device (11) is installed in the seat element (51); these arc control device (12) are installed in the element (52) so that these arc control device (12) are suitable for this shearing device (11); thereby when two elements (51,52) extinguish arcs when assembling each other.

2. by the described circuit breaker of claim 1, it is characterized in that, described protection box body (50) by shielding, fireproof, waterproof constitute with material dust protection.

3. by the described circuit breaker of claim 2, it is characterized in that this protection box body (50) is made of polyvinyl ester.

4. by the described circuit breaker of claim 2, it is characterized in that this seat element (51) comprises the shape and size of the outline that is suitable for shearing device (11), the size and dimension of element on this (52) is suitable for the outline of arc control device (12).

5. by the described circuit breaker of claim 1, it is characterized in that towards down closed at least in part, this fixation wall (63) comprises that some are used for air circulation and electric arc from two contact points (20 to element on this (52) by fixation wall (63), 24) opening (65,66) that passes through to arc control device (12).

6. by the described circuit breaker of claim 1, it is characterized in that, should go up element (52) and equip the valve (70) that some elastic synthesis materials constitute, these valves (70) are fixed on the outer wall (72) of element by biasing device (74), described valve is provided for flexibly cramming described opening (73), the gas that forms owing to pressure when allowing to discharge extinguish arcs.

7. by the described circuit breaker of claim 1; it is characterized in that; two elements (51 of protection box body (50); 52) hinged each other along the jointed shaft (9) of one of side that is positioned at the protection box body, element on this (52) can be lifted by the pivot around described jointed shaft (90) and setover in seat element.