CN201898050U - Electrical switch apparatus for low-voltage circuit - Google Patents

Abstract

The utility model relates to an electrical switch apparatus for a low-voltage circuit, comprising an external shell, a movable device, a driving device and a supporting device, wherein the external shell contains at least one arc chamber, at least one fixed contact and at least one movable contact relative to each pole, the fixed contact is coupled/decoupled with the movable contact, the movable device is provided with at least one bearing relative each pole, and the bearing is suitable for containing the corresponding movable contact; the driving mechanism is operatively connected to the movable device to enable the movable device to move; and the supporting device is operatively connected to the movable device.

Description

The electric switch equipment that is used for low-voltage circuit

Technical field

The utility model relates to a kind of electric switch equipment, in particular to a kind of automatic circuit breaker or isolating switch that preferably is used in the low-voltage circuit.

Background technology

As everyone knows, be used in switchgear in the low-voltage circuit (that is rated voltage reaches the galvanic application scenario of 1000V alternating current/1500V) and be the equipment that is designed to make that the specific part of electrical system and the load that functionally links with it can proper operations, described switchgear has circuit breaker, automatic circuit breaker, isolating switch and contactor usually, and these devices are referred to as " switchgear " and hereinafter are called circuit breaker briefly.

Circuit breaker can be constructed with various different configurations, such as constructing with the execution scheme of so-called " fixed ", " plug-in type " or " drawing out type ", and generally comprises the housing that holds one or more utmost point bars; Each utmost point bar comprises at least one fixed contact and a corresponding movable contact, and these contacts are connected to corresponding terminal and connect to carry out I/O with related circuit.Appropriate driving device can move movable contact; Particularly, the action of this drive unit is to operate on main shaft by convention, described main shaft functionally is connected to movable contact, makes to make described movable contact be coupled to fixed contact (breaker closing) or separate (circuit breaker disconnection) with fixed contact because of its rotation.Coupling/decoupling zero between the contact is carried out in the arc chamber inside of special use, and described arc chamber is configured such that the energy minimization effect of arc.The motion of movable contact both can manually cause by being arranged on the suitable lever on the circuit breaker front portion, also can cause by the intervention of the set known protection equipment that is equipped with of this circuit breaker.

Have some such schemes, in these schemes, movable contact is arranged in the suitable bearing that directly is limited to main shaft, and in this case, described main shaft is configured to so-called movable whirligig.Head can guarantee mutually or the utmost point between insulation and the correct transmission of contact motion, and stand all related power.

Generally speaking, no matter layout how, switchgear must be fast in intervention and is reliable, and must guarantee enough life-spans and must have compactness as much as possible, assemble and the easy-on structure flexibly, easily, and can be with competitive cost realization.

The utility model content

The purpose of this utility model is to provide a kind of such switchgear with improved function and characteristic.

This purpose realizes according to switchgear of the present utility model by a kind of.Described switchgear is a kind of electric switch equipment that is used for low-voltage circuit, comprise: external shell, described external shell accommodates at least one arc chamber, at least one fixed contact and at least one movable contact that is directed to each utmost point bar, and described fixed contact and described movable contact can coupled to each other/decoupling zeros; Head, described head are directed to each utmost point bar and have at least one bearing, and described bearing is suitable for the movable contact of ccontaining correspondence; Driving mechanism, described driving mechanism functionally are connected to described head and move to allow described head; Bracing or strutting arrangement, described bracing or strutting arrangement functionally is connected to described head.By according to switchgear of the present utility model, because bracing or strutting arrangement props up head with respect to external shell, therefore keep away rabbit and form the bigger contact area that causes disadvantageous friction phenomenon, and, because bracing or strutting arrangement is gone back the pivot of generator itself simultaneously, and play the effect of journal bearing, so bracing or strutting arrangement has increased the quantity of the possible operation configuration of the circuit breaker with the rotation that tilts by different way.

With reference to as a kind of the description according to switchgear of the present utility model in the execution mode of the switchgear of circuit breaker, this is intended to limit the application's possible range absolutely not below.

Description of drawings

From some the preferred but non-exclusive execution modes according to switchgear of the present utility model, its characteristic and advantage will be clearer, and these execution modes illustrate as example in the accompanying drawings, wherein:

Fig. 1 is first stereogram according to first execution mode of the circuit breaker that includes the energy accumulation driving mechanism of the present utility model;

Fig. 2 is first stereogram that includes the circuit breaker of direct driving mechanism;

Fig. 3 and 4 is the stereograms according to the parts of the housing of circuit breaker of the present utility model;

Fig. 5 and 9 is decomposition views of the circuit breaker among Fig. 1;

Fig. 6 and 7 is the stereograms according to the head of circuit breaker of the present utility model;

Fig. 8 and 10 is the cutaway views according to circuit breaker of the present utility model;

Figure 11 is the stereogram of the circuit breaker of Fig. 1;

Figure 12 is the decomposition view of the circuit breaker of Fig. 2;

Figure 13 is the schematic diagram according to circuit breaker of the present utility model, there is shown interchangeable driving mechanism;

Figure 14 and 15 shows the possible execution mode that can be used in according to the contact in the circuit breaker of the present utility model;

Figure 16 shows the decomposition view of the driving mechanism of direct type, and lever keeper and lever among the figure are separated from one another;

Figure 17-18 shows the possible execution mode that can be used in according to the reinforcement in the circuit breaker of the present utility model;

Figure 19-21 shows the possible execution mode that can be used in according to the tripping mechanism in the circuit breaker of the present utility model;

Figure 22-24 shows according to of the present utility model and is used for possible the execution mode ccontaining and equipment that is connected the annex that is used for circuit breaker;

Figure 25-31 shows the possible execution mode that is used for the terminal of circuit breaker according to of the present utility model;

Figure 32-36 shows the power supply unit that can be used in according to the Electronic Protection equipment in the circuit breaker of the present utility model.

Embodiment

With reference to described accompanying drawing, circuit breaker 1 comprises housing 2, and described housing 2 holds one or more electric utmost point bars, and each described electric utmost point bar has at least one fixed contact 10, described fixed contact 10 and at least one movable contact 20 coupling/decoupling zero.Housing 2 also is equipped with the head 50 that is made of formed body, and described head 50 has at least one bearing 25 of each utmost point bar that is used for circuit breaker 1.Driving mechanism 60 functionally is connected to head 50, and allows this head 50 to move around rotation 100.Circuit breaker shown in Fig. 1 comprises energy accumulation driving mechanism 60, and described energy accumulation driving mechanism 60 is used in the application scenario of rated current that high value is provided and/or disconnection power usually.Alternately, can use driving mechanism 61 shown in Figure 12, that be particularly suitable for the direct type of rated current and/or lower disconnection power.

Preferably, circuit breaker 1 comprises that such as axial bracing or strutting arrangement described bracing or strutting arrangement functionally is connected to head 50 and opposes with the gravitation that produces along rotation 100.Since rotation 100 be level or with respect to the plane inclination of approximate horizontal, so these gravitation present in a different manner.And bracing or strutting arrangement props up head 50 with respect to external shell 2, thereby avoids forming the bigger contact area that causes disadvantageous friction phenomenon.Bracing or strutting arrangement is gone back the pivot of generator itself simultaneously, and plays the effect of journal bearing.Thus, bracing or strutting arrangement has increased the quantity of the possible operation configuration of the circuit breaker 1 with the rotation that tilts by different way.Such as, that this allows to be designed for to operate under the situation that the axis at head is horizontal, be used for high electric current or high other circuit breaker of powered stage that disconnects can be installed according to different configurations, make that the axis such as head is in vertical position.

Housing 2 preferably covers 4 bottom 3 and constitutes by being attached to, and this bottom 3 is attached to and covers 4 mode is that the parts that limit circuit breaker 1 are contained in its volume inside.The structure of housing 2 is finished by means of protective cover 5, and described protective cover 5 is applied to and covers 4 and can be removed with partly near the inner body of circuit breaker 1 by the operator.

Fig. 3 and 4 shows the part that constitutes external shell 2, and wherein bottom 3 comprises the first contact surface 6A, and one group of protuberance 5A forms from the described first contact surface 6A, and prepares to be inserted in and cover 4 the second contact surface 6B upward in the hole of layout.Also form other protuberance 5B from second surface 6B, described protuberance 5B can be inserted in the first contact surface 6A and go up in the relevant hole of arranging.Substantially, the shape of two contact surface 6A and 6B, how much conjugation and allow the part of housing 2 to run through each other at least partly.The maintenance that connects is further to guarantee by one group of hold-down screw 9 or such as the equality unit of connecting rod etc., these devices guaranteed housing 2 fully firmly, and the opposing stress that it stood during the normal running of circuit breaker 1.

In housing 2, for each utmost point bar of circuit breaker 1 limits at least one arc chamber 200, be equipped with some electric arc separator plates or thin slice (not shown) in described arc chamber 200 inside, described electric arc demarcation strip or thin slice play the effect that helps extinguishing the electric arc that the separation because of circuit breaker 1 contact produces.Each arc chamber 200 comprises at least one upper shed 203, and described upper shed 203 is configured for discharging the passage of the gas that the generation because of electric arc produces.Lid 4 also has some lateral openings 204, described lateral openings 204 allows the inside of operator near head 50, thereby such as the jockey between installation or dismounting driving mechanism 60 and the head 50, perhaps enable state indication axle or bar (such as disconnection, closure, dropout) can expose.

Fig. 5 allows to observe the inboard of fixed contact 10 bottom 3 disposed thereon, and each described fixed contact 10 is electrically connected to electrode 21.Fixed contact 10 comprise separately be arranged in movable contact 20 on the working portion 10A that contacts of related work part 20A.Advantageously, fixed contact 10 and movable contact 20 can comprise that dihedral keeps away arc device 11, and the task that described dihedral is kept away arc device 11 is a transferred arc, so that the deterioration of the working portion of restriction contact itself.

Advantageously, shown in Figure 14 and 15, the dihedral of each fixed contact 10 is kept away arc device 11 and is had the notch that gasification element 12 is inserted within it.This notch forces arc current to be divided into two shuntings, and its characteristic is reduced-current and temperature (low hot electron emission), and is the bigger distance with respect to movable contact, because it becomes further away from each other.Therefore, notch helps faster current interruption.Gasification element 12 so cause standing the energy that reason electric arc discharges hot the time emission can suppress the deionization material of the starting the arc once more of electric arc, thereby further make current interruption acceleration itself.At last, keep away between arc device 11 and the electrode 21 at dihedral and to be furnished with isolated component 13, described isolated component 13 alternatively can be by the gasification materials manufacturing.The major function of isolated component 13 is to keep the whole geometry configuration of fixed contact 10 muchly; Other function of this element is to realize further deionization effect and seal arcing gas, and described arcing gas must not arrive the key area of circuit breaker 1.

Fig. 6 and 7 show head 50 such as a kind of possible execution mode that is used for three utmost point rod-type circuit breakers; This does not get rid of the circuit breaker that the scheme that will describe below also is used to have the utmost point bar of varying number.As shown, be equipped with movable contact 20 in each bearing 25, described movable contact 20 can be realized with single, perhaps realized with a plurality of parts adjacent one another are, as shown in Figure 7.Bearing 25 is embodied as makes the movable contact 20 that is contained in wherein share common axis of rotation line 100 with head itself.Rotation 100 is made of the horizontal rotating dog (not shown among the figure) that is arranged on the notch 23 that is formed in each bearing 25 physically.Particularly, bearing is limited by antetheca 26, rear wall 27 and two sidewalls 28 and 29 roughly respect to one another roughly relative with described antetheca 26 basically.These walls are located such that mutually and limit at least one first opening and one second opening that relevant movable contact 20 and electric engagement device 47 stretch out (see figure 7) from first opening and second opening respectively.Such as the electric engagement device 47 that constitutes by copper stranded conductor movable contact 20 is electrically connected to electrode 22, described electrode 22 and then be connected to circuit breaker 1 and be inserted in wherein power main.If circuit breaker 1 is operated according to known double break principle, be suitable for so can stretching out from second opening with other movable contact 20 of the fixed contact coupling of group in addition, described other group fixed contact is similar to above-mentioned fixed contact.Head 50 comprises circular connecting portion 55A and the 55B between two adjacent bearings 25; Among these connecting portions 55A and the 55B each comprises at least one corresponding concave part 51 and 52 respectively.

Preferably, bracing or strutting arrangement comprises the first axial support arm 80 and the second axial support arm 81, and these axial support arms have at least two ends respect to one another.Particularly, each arm comprise first operating side 85 that is connected to head 50 and be linked to driving mechanism 60 structural portion 70 second keep end 86.Preferably, two support arms 80 and 81 are the configuration with three protuberances, and described protuberance comprises that the 3rd keeps end 86A, and the described the 3rd keeps end 86A adjacent with second end 86 that is limited.

Fig. 9 is the decomposition view that is equipped with the circuit breaker 1 of energy accumulation driving mechanism 60.The structural portion 70 of mechanism 60 comprises two sides 71 and 72, is equipped with the necessary mechanical device of motion of head 50 between side 71 and 72.Be equipped with transverse wall 74 between these sides 71 and 72, the purpose of described transverse arm 74 is the mechanical rigids that increase driving mechanism 60.Be positioned to transverse wall 74 sidepiece be to load lever 35, the function of described load bar 35 is the equipment 36 that activates the spring that is used to load mechanical device.Shown in scheme in, first side 71 also comprises lateral openings 77, described lateral openings 77 be arranged to allow to be used for circuit breaker 1 state (such as: disconnect, closed, thread off) indicator elment 79 can stretch out.

The structural portion 70 of driving mechanism 60 comprises fastening projection 78, and described fastening projection 78 makes driving mechanism itself be fastened to the bottom 3 of housing 2.As mentioning, preferably carry out fasteningly via a plurality of screws or connecting rod 9, described screw or connecting rod 9 are inserted in the through hole 83 on the bottom 3 that is defined in external shell 2, so that screw in the screw thread hole 34 that is arranged on the fastening projection 78 subsequently.

Axial support arm 80 and 81 preferably adopt such as screw or alternately detachable fastener 73 such as rivet and link to driving mechanism 60, each side 71 and 72 the outside on.In another scheme, support arm 80 and 81 can also be made of the monolithic entity with side 71 and 72, therefore, need not to adopt fastener.

Obviously, this connection makes head 50 be cantilevered fashion substantially with respect to housing, and for this reason, support arm 80 and 81 the form with three protuberances are especially favourable, because it allows bigger flexing resistance, advances and allows head itself more stably to locate. Support arm 80 and 81 also provides the pivot of head 50 via hinge joint.Described hinge joint is implemented in radial recess 51 and 52 inside that are arranged among connecting portion 55A and the 55B.As shown in Figure 6, each support arm 80 and 81 hinge joining means comprise corresponding rotating dog 110,111, and described rotating dog 110,111 is inserted in and is arranged in first hole 84 on first operating side 85 and is arranged in second hole on the head 50.Preferably, rotating dog 110 and 111 has vertically section 112 of at least one first calibration, the vertically inner surface connection in first hole 84 of qualification on section 112 and the relevant support arm 80 or 81 of described calibration.Each pin comprises that second keeps section 113, and described second keeps section 113 to suffer restraints by friction or by being screwed into second hole that is provided with on the head 50.Keep section 113 to allow pin with respect to head 50 location, calibration segment allows head itself with respect to support arm 80 that it is propped up and 81 rotations simultaneously.From the angle of assembling, described scheme is favourable, helps it is positioned at the appropriateness of head 50 inside at radial recess 51 and 52 places axial dimension because each rotating dog has.Figure 10 shows the cutaway view of the connection of being discussed, and allows to observe the advantage of this scheme.Utilization is limited to the opening 114 on the sidewall of ccontaining bearing 25, and rotating dog is arranged in its operating position.The axial dimension of rotating dog 110 and 111 appropriateness has also improved the Mechanical Reliability that is connected.

As shown in Figure 7, supporting walls 80 and 81 operating side and radial recess 51 and 52 connect in split hair mode, so that limit the gap as much as possible.And the inner surface of support arm 80 and 81 surface and radial recess 51 and 52 is compatible each other so that limiting friction phenomenon as much as possible.This contact area is taken on bearing in practice, because it supports head 50, but allows it to be rotated under the influence of the inclination that is not subjected to rotation 100.

Fig. 6,8 and 13 allow to observe the possible configuration that is connected between driving mechanisms 60 and the head 50.Particularly, driving mechanism 60 comprises the head rod 91 and second connecting rod 92, the described head rod 91 and second connecting rod 92 functionally are connected to head 50 via common horizontal drive pin 131, described horizontal drive pin 131 is inserted in and is arranged at head originally on one's body the passage.Connecting rod 91 and 92 is inserted in the hollow bulb 57, and described hollow bulb 57 limits in the antetheca of the bearing 25 of head 50 and laterally holed with ccontaining drive pin 131.Preferably, during the normal running of circuit breaker 1, drive pin 131 is via support arm 80 and 81 and be fastened on its correct operating position, and each described support arm 80 and 81 has projecting teeth 88, near described projecting teeth 88 axial retention pin 131 its end is shown in Fig. 8.In this embodiment, pin 131 extraction and installation thereby will be implemented with respect to the mutual alignment of arm 80 and 81 by changing head 50 make the motion that each tooth 88 can blocking pin itself when it is outstanding, thereby allow it to slide along passage.

As shown in Figure 6, the identical portions office that hollow bulb 57 is limited on the head 50, radial recess 51,52 is arranged.It is favourable having a plurality of hollow bulbs 57, because this allows connecting rod 91,92 to position with variable distance according to the type of the driving mechanism that is adopted.As the replacement scheme of hollow bulb 57, can arrange some radial projection, these radial projection are holed to insert drive pin 131.The latter still must be arranged in the eccentric position with respect to the rotation of head 50, and described rotation is provided by the aforementioned rotating dog 110 and 111 that is attached to support arm 80 and 81.Thus, along with the motion of drive pin 131, cause head 50 rotations, and therefore cause movable contact 20 rotations thereby produce torque.

Figure 10 shows second execution mode of axial supporting device, and this second execution mode can separate with previously described bracing or strutting arrangement or be used in combination.Particularly, it comprise the end parts 45 that is arranged in head 50 and 46 and external shell 2 between two cods 41,42.Advantageously, bearing can be the thrust type, perhaps alternately, can be spherical, cylindrical or tapper shape.If the application combination of the application of cod 41,42 and support arm 80,81 then especially favourable is because the axial thrust that is supported is bigger.Thus, even also can easily install, keep desirable functional simultaneously according to different angles such as the big automatic circuit breaker of so-called air circuit or ACB equidimension.

Figure 11 shows the circuit breaker 1 of main assembling stage of being in of just having described when finishing.Particularly, this allow to observe and cover the lateral openings 204 that limits on 4 the side, and this lateral openings 204 allows inside near lid itself with installation with remove horizontal drive pin 131.This scheme allows under the situation that need not to dismantle two walls that constitute housing 2 driving mechanism 60 to be removed from circuit breaker 1 substantially, thereby sees to have tangible advantage from angle of practice.

Figure 12 is the decomposition view of circuit breaker 1 that comprises the driving mechanism 61 of direct type, and described driving mechanism 61 comprises the operating lever 76 by the circuit breaker that is used for closure, disconnects or resets of operator's operation.Although directly driving mechanism 61 has different structural configurations with energy accumulation driving mechanism 60, it is suitable for being connected to according to the identical configuration of at first showing the bottom 3 of housing 2.Therefore, be to be understood that another advantage of circuit breaker 1 is, it is configured such that structurally permission easily replaces driving mechanism with the structure driving mechanism different with performance, as schematically illustrated among Figure 13.Thereby can be simply by extracting drive pin 131 out, support arm 80 and 81 is deviate from from the side 71 and 72 of driving mechanism 60 and driving mechanism 60 being pulled down from the bottom 3 of housing 2 by removable screw or connecting rod 9, come easily to replace the driving mechanism 61 of direct type with energy accumulation driving mechanism 60.In this case, same circuit breaker 1 is simply by only replacing driving mechanism rather than replacing whole circuit breaker and can be applied in the various application scenario as common carrying out.

Figure 16 shows the possible execution mode that is connected between the maintaining part of operating lever 76 and direct driving mechanism 61.As shown, lever 76 has columnar slide construction, thereby can move according to only one rotary freedom around virtual center.Driving mechanism comprises lever keeper 17, and described lever keeper 17 comprises the base portion of shape conjugation of the base portion of shape and lever, and terminates at the assembling stage and prepare to be inserted in plate 18 in the corresponding hole of lever 76.Pin 19 is retained to lever keeper 17 with lever 76, makes that the lifetime chien shih lever 76 at circuit breaker 1 becomes one with lever keeper 17.At assembling position, sell 19 some grooves 24 that stop and cross in the base portion that is formed on lever, remain on the base portion back of lever keeper 17 simultaneously.The two ends of pin 19 are wiped and are bumped on the inside of frame side of driving mechanism, and pin 19 is free to slide along this inner side with lever keeper 17 with lever 76 securely.Driving mechanism inside of frame side has the otch 38 of two symmetries corresponding with the exact position of pin in it is divided a word with a hyphen at the end of a line.From this single position, can be with lever and driving mechanism assembling or dismounting.Preferably, being dimensioned to of pin makes its operation location have only by using active force to finish.In other words, pin inserts and can be not gapped under pressure, so that help to keep the operating position of himself in the unlimited time.Adopt this scheme, operating lever 76 is installed easily or is replaced, and in the realization of the operating lever 76 known functions that will bear, has the essential characteristic of mechanical strength, motion accurate, low friction, stability and reliability.

Preferably, circuit breaker 1 comprises the reinforcement 140 in the bearing 25 that is positioned in the formed body that is defined in head 50, the rigidity that is shaped so that the stressed zone that can improve described formed body of described reinforcement 140.The shape of reinforcement, size and position can change as required, and can be made for suitable shaping and bending single, maybe can be made for many parts.

Such as, shown in Figure 17 and 18, reinforcement 140 comprises having the formed body of the hollow space 141 of cross section in the form of a substantially rectangular, leans out two fins 142 and 143 forward from this hollow space 141.The outer surface of part 141 is shaped so that and can mates with the inner surface of the bearing 25 that completely or partially covers this part 141, makes fin 142,143 by being bonded in the notch 220 and 230 that is defined in the bearing 25 such as the buckle mode.Preferably, the hole 320,330 of two correspondences is limited on the fin 142,143 to allow drive pin 131 to walk.Thus, resulting from the power of drive pin 131 and rotating torque can be distributed on the obviously wideer surface.

Preferably, the formed body 140 of reinforcement also comprises some flat sites 160, and described flat site 160 is suitable for cooperating in the butt mode with the corresponding flat site 770 of bearing 25.Thus, the power that results from drive pin 131 can be discharged in the solid area of formed body 50.

Advantageously, reinforcement 140 is made by ferromagnetic material, and covers at least a portion of the inner surface of each bearing 25.Preferably, the reinforcement of making by ferromagnetic material cover each bearing 25 inner surface at least 25%; In fact, observed the element of making by ferromagnetic material, even the size appropriateness also makes it possible to obtain about 8% increase (49kA is to 690V, and all other conditions equate) of electronic sealing from experiment.

Use reinforcement 140 to increase head and receive, thereby improved the disconnection performance of circuit breaker because of the ability of electronic repulsion by the mechanical force of movable contact transmission.And, having limited the galvanomagnetic effect between the consecutive roots bar of circuit breaker for reinforcement 140 selected shapes and ferromagnetic material, the result is that their performance is further improved under the situation that all other design characteristicses equate.

Figure 19-21 shows the scheme of being adopted in the circuit breaker 1, it comprises the motion tripping mechanism, and described motion tripping mechanism functionally is connected to movable contact 20 and will will come driving mechanism is activated (driving mechanism 61 that is direct type in the example shown) via one of its control member.As shown, circuit breaker 1 comprises trip shaft 40, the motion of described trip shaft 40--in relevant example shown be by the motion tripping mechanism cause around the fixedly rotation of pivot 103---directly mechanism 61 is activated.Particularly, the motion tripping mechanism comprises sliding bar 211, and the first operating side 211a of described sliding bar 211 is suitable for touching mutually with the shaped projection 411 that extends from trip shaft 40.Head 50 comprises and is used to allow and carries out the first bearing 8a that divide a word with a hyphen at the end of a line that guided of sliding bar 211 towards trip shaft 40.Movable contact 20 comprises that the second operating side 211b of sliding bar 211 slidably is inserted in the second bearing 8b of its inside.Because sliding bar 211 and movable contact 20 is coupled to each other and therefore connect and physical connection by means of cooperating is so in case movable contact 20 carries out displacement, sliding bar 211 will move.Sliding bar 211 not physical connection has carried out to movable contact 20 but at movable contact 20 that the just mobile possible scheme of sliding bar 211 drops in the scope of the utility model theory certainly after the certain displacement.Preferably, trigger 99 places between trip shaft 40 and the mechanism 61.

Figure 19 shows the circuit breaker that is in the close position.First movable contact 20 and fixed contact coupling and owing to known contact spring 32 and control spring (itself being known) keep being under the pressure.Control lever 76 is in the position of the closure state that indicates circuit breaker, and control spring partly carries simultaneously.Figure 20 has shown the stage of the electronic departure event of moving contact.Along with the rotation of movable contact 20, sliding bar 211 is forced to move along the first bearing 8a.When the dropout of driving mechanism 61 was touched with trip shaft 40 mutually at the first operating side 211a, this made that trigger 99 is released after the rotation of presetting around the axis 103 of himself.The actuating of trigger 99 has discharged the rotation of driving mechanism 61, thus this so that the pulling head 50 cause its rotation, allow second rapid movement of the separation of contact to be achieved thus.The position component of the circuit breaker 1 that in case Figure 21 allows to observe the separation of contact when having finished.The execution mode of the driving mechanism 61 shown in it is emphasized that is an example because described motion tripping mechanism and other possible be equal to the known traditionally driving mechanism that mechanism can activate any kind.

So the circuit breaker 1 of conception is realized rapid-releasing between the contact by the motion that utilizes movable contact 20 to produce because of electronic repulsive force.Substantially, what movable contact 20 was taken on is the actuation element of motion tripping mechanism, perhaps or rather, is the actuation element of driving mechanism 61.And such scheme has solved the typical problem of flow restricter, that is to say, has guaranteed to make contact keep separating after the spontaneous repulsion.

Advantageously, circuit breaker 1 comprises equipment 171, described equipment 171 is used for ccontaining and coupling, described annex such as but be not limited to the auxiliary contact that is used in reference to the state of illustrating, be used to make that minimum or maximum voltage relay or temperature sensor disconnect, the closed and servo auxiliary actuator that resets.Shown in Figure 22-24, equipment 171 comprises molding structure 510, and described molding structure 510 is equipped with the cable bus of one to be electrically connected described annex and one or more bearing 621,622,623,624,625 that is used for ccontaining described annex.The cable bus of one (not shown) is positioned at molding structure 510 inside, and comprises one or more printed circuit board (PCB)s and be used to hold the bearing 622,623,624 of described annex.Be used for being positioned at printed circuit board (PCB) with described annex or the one or more terminal boards that are connected with miscellaneous equipment or terminal 313-317.In the example shown, some terminal boards or terminal are prepared to be connected with equipment that is contained in circuit breaker inside or annex, and other terminal board or terminal such as terminal 313 and 314, are prepared to be connected with equipment, annex or the systematic part of circuit breaker outside.Equipment 171 comprises the mechanical interface device 30 with one or more motion interfaces of circuit breaker 1, with such as the state of circuit breaker (disconnect, closed, thread off) is sent to the one or more annexes in the equipment of being contained in 171.

As seeing among Figure 23, annex 650 is inserted in such as in the bearing 625, and is electrically coupled to cable bus via the terminal board that is had on the bottom of bearing 625.In an identical manner, annex 652 is inserted in the bearing 622 and with terminal 315 and electrically connects, and simultaneously annex 651 is inserted in the bearing 621, thus with base portion on the terminal block that had electrically connect.

Preferably, bearing and corresponding annex have the geometrical configuration that is suitable for helping its conjugation that is coupled to each other.

And equipment 171 comprises the device that is used for fixing described annex, and described device is such as being made of screw device or through rod.

As shown in figure 23, the structure of equipment 171 constitutes single component, and wherein annex is connected to corresponding terminal, and this assembly is ready to be inserted in the ccontaining bearing 920 of circuit breaker 1; Bearing 920 has the geometry with equipment 171 conjugation, and connects and can reinforce by adopting suitable fastener.

As shown in figure 24, in case equipment 171 is inserted in the circuit breaker 1, one or more terminals of cable bus can insert in the terminal block such as terminal 313 and 314, and this makes it possible to cable bus and then annex are connected with the miscellaneous equipment of circuit breaker outside; For this reason, Figure 25-31 shows a kind of possible execution mode of terminal block 620.Terminal block 620 comprises formed body, and described formed body has and is configured as and structure 510 machinery and first end 201 that electrically connects and at least one first opening 210 that is used to insert first cable connectors.Be positioned at formed body inside be the terminal that is used to make terminal board with stube cable between the conduction device (not shown) that is electrically connected.Preferably, the formed body of terminal 620 is become by half hull shape of two connections; And formed body can have the one or more openings 207 that are used to insert one or more stube cables, and can have the other opening that the realization of can be used in connects with the first and second terminal plug-in types of terminal block at first end, 201 places.In addition, be provided with the device that is used to lock and discharge the stube cable of elastic type; In this case, preferably, one or more holes 214 are set on formed body, thereby guarantee that the operator is near flexible locking and release end.

The terminal of terminal block carried out with being connected in simple mode of terminal 620, can and electrically connect with terminal block machinery because the end 201 of terminal 620 is shaped so that.In practice, terminal 620 is inserted in the terminal block, thereby realize and being connected of the terminal of terminal block, and therefore and the body interior of realization and circuit breaker being connected of ccontaining annex and equipment, thereby via hole 210,207 be positioned at the conduction device of terminal inside and can be close to the outside.

As shown in figure 25, in case apply protective cover 5, only the top of terminal keeps visible and can be approaching, has the opening 210,207 and the locking of approaching described cable and the manhole 214 of releasing device that are used to insert cable in this office, top.Figure 26-31 shows the complementary annex that is used in hope realizes circuit breaker with the dismountable/form that can extract the situation.In this case, between terminal block and terminal 620, be provided with the first mutual positioner 39 and the second mutual positioner 48.Particularly, first mutual positioner 39 preparations connect and comprise the body with first surface 301 and second surface 302 with the body of circuit breaker, described first surface 301 is provided with and is used for the contact device 305 that is electrically connected with the terminal of terminal block, is positioned with second contact device 303 that is electrically connected to first contact device 302 on described second surface 302.

Preferably, first contact device 305 be embodied as make can by plug-in type connect carry out its with the terminal of terminal block between be electrically connected, that is to say, carry out being electrically connected of terminal of first contact device 305 and terminal block to be similar to by being inserted into the mode of being carried out in the terminal 620; Second surface 302 has a plurality of grooves and a plurality of contact element 303, and described contact element 303 is lined up two row ground and leant out forward.

With reference to Figure 28, in case apply protective cover 5, the top that only is positioned with second contact device 303 on its of second surface 302 keeps visible and can be approaching.Thus, make with the terminal of terminal block be connected so that with the annex and being connected of equipment of the body interior that is contained in circuit breaker can be via described mutual positioner 39 near the outside.

With reference to Figure 27 and 29, preferably, positioner 48 comprises having the body 412 that connects surface 440 with the tetrad of second surface 302 conjugation mutually; The 3rd contact device 402 that is used for being electrically connected with second contact device 303 is positioned at the 4th surface 440.

Be with groove on the second surface 302, positioned internal at described groove has the 3rd contact device 402, described the 3rd contact device 402 preferably two row in two Different Plane is arranged, make and touch mutually with the two corresponding rows of contact element 303 easily that described contact element 303 leans out forward from second surface 302.

Body 412 further comprises the 5th surface 403 that is positioned with the 4th contact device 404 on it, and described the 4th contact device 404 is used for being electrically connected and being electrically connected to described the 3rd contact device 402 with described one or more terminals 620.

Preferably, the second mutual positioner 48 can comprise at least one the 6th contact surface 406 that connects with supporting construction 601.Being positioned on the 6th surface 406 is mechanical coupling, such as the system 420 and the snap-engagement system 421 that are used to guide insertion.

Preferably, the second mutual positioner 48 has modular construction and comprises a plurality of modularization contact elements 410.

Circuit breaker 1 is inserted in supporting construction inside (Figure 30), the feasible electricity and the mechanical attachment that can guarantee between first coupling arrangement 39 and second coupling arrangement 48; Contact device 303 and 402 is sliding types, and contact device 305 and 404 is the types that are clasped.

5-linked connect the surface the 403 and the 4th contact device 404 geometrical configuration and electric on roughly repeat with terminal block.Thus, in case circuit breaker 1 be installed in the supporting construction 601, then make with the terminal of terminal block be connected so that with being connected of annex that is contained in circuit breaker inside and equipment via mutual positioner 39 and 48 and can be close to the outside.

As shown in figure 31, be used in the same terminal 620 in the circuit breaker thereby can be installed in the terminal block 403 with fixed form, thereby can be connected immediately with the annex and the equipment of circuit breaker inside with dismountable/form that can extract.

Therefore, described scheme is by means of the interconnection that can discern each described annex and make its single number bus that correctly plays a role and electrical interface unit arrange all annexes.This bus allows to distribute the necessary auxiliary power supply of various annexes simultaneously, but also allows to distribute all typical case orders relevant with identical annex.The monopolizing characteristic of this interconnection system be this bus be directly form and be distributed in detachable, to be inserted on the annex strutting piece in the circuit breaker; And extensible type connects, promptly is suitable for providing the connection of variable and upgradeable contact quantity to be achieved as required.At last, adopt the dismountable/circuit breaker that can extract proof to have and adopt the identical connecting interface of machine made circuit breaker, assemble two kinds of forms or change into the necessary number of components of another kind of form and limited mistake appears in the operator at access phase possibility from a kind of form thereby reduced.

Another aspect of the present utility model relates to Electronic Protection equipment--normally relay---power supply unit 700, described power supply unit 700 can link with circuit breaker 1.Shown in Figure 32-36, equipment 700 comprises first magnetic circuit 710 of the closed path of being made up of one group of lamination; The closed path of first magnetic circuit 710 allows around the leading body 711 corresponding to one of the phase of circuit breaker 1 or utmost point.Have and produce secondary current and be positioned to one section around first magnetic circuit 710 with auxiliary winding 712 to the function of protection supply of equipment electric power.

Equipment 700 comprises second magnetic circuit 720.Two magnetic circuits 710 and 720 structurally separately and differ from one another and make two magnetic circuits 710 and 720 near make at least a portion magnetic fluxs along 710 circulations of first loop by 720 interceptings of second magnetic circuit together.Particularly, when the electric current in the leading body increased, first magnetic flux also little by little tended to be transmitted in second loop 720.Thus, second flux will be as the variable proportion of the flux that is produced by the electric current that circulates in leading body and circulation in second magnetic circuit 720; Particularly, the flux part in second magnetic circuit 720 increases along with the increase of the value of the electric current that circulates in leading body, thereby little by little breaks away from first magnetic circuit 710.In these two magnetic fluxs, only first magnetic flux is subjected to the influence of auxiliary winding 712, thereby galvanometric output only depends on it.Output is adjusted to as follows: under the low current conditions in leading body 711, do not have the migration of perceptible magnetic flux in second magnetic circuit, thereby secondary current can utilize fully with to Electronic Protection supply of equipment electric power; On the contrary, under high principal current condition, the output that is produced by winding becomes suitably and reduces, and makes in the limit of the characteristic compatibility that can remain on and protect equipment.

Among Figure 33 by caption the behavior of equipment 700.Curve A represent to be wound with on its of first magnetic circuit 710 in section of winding 712, as the figure line of the magnetic flux of principal current function; Curve B is represented the figure line of the magnetic flux in second magnetic circuit 720, and curve C is represented the given total flux of aforementioned magnetic flux sum.In practice, when principal current increased, the flux that is received by second magnetic circuit 720 freely increased without restriction, and tended to rest near the constant rank corresponding to the flux in the section of auxiliary winding 712.This makes it possible to obtain at the place, end of auxiliary winding 712 equally the electric current of constant in the full feature scope of principal current.Closely depend on the design parameter of whole described parts as the value of this electric current of principal current function.

Figure 34 shows the preferred implementation of power supply unit 700, and wherein second magnetic circuit 720 is made of the flat lamination with the closed configuration assembling equally.Second magnetic circuit 720 is positioned at around the auxiliary winding 712, makes to twine its part, and functionally be connected to first magnetic circuit 710 in two main region, and two magnetic circuits are arranged to roughly contact with each other at described main region place.Particularly, two attachment areas are arranged in the end of auxiliary winding, thereby realize desired any magnetic flux shunts.In the attachment areas between two magnetic circuits, first magnetic flux has been intercepted and produced is skew towards second magnetic circuit 720.From the path in loop 710 to loop 720, the line of flux is gone along having the path of at least one perpendicular component on the direction of the lamination of being assembled.Therefore, at least one component of these skew lines is vertically crossed the plane of the lamination of two loops 710 and 720, thereby surmounts the natural magnetic gap that is made of between the adjacent laminates of each magnetic circuit 710 and the 720 and space between loop 710 and 720.This path provides the possibility of the desired effects of the weighting subtraction (weighted subtraction) based on the magnetic flux of principal current value.

And the connection between magnetic circuit 710 or 720 the surface can be carried out with direct mode, that is to say, and in a mode that leans against on another in two magnetic circuits, perhaps, by means of such as the mutual locating interface element that constitutes by antimagnetic material; This scheme helps walking from first magnetic circuit to the second magnetic circuit about the high electric current in the leading body, flux; On the contrary, about moderate current, flux walking between two loops is suppressed.

Shown in Figure 34-36, equipment 700 further comprises by what make such as suitable magnetic material seals element 713, describedly seals the relevant portion that element 713 is suitable for keeping auxiliary winding 712 and magnetic core, and is suitable for improving whole magnetic efficiency.The shell of being made by insulating material 714 shown in Figure 35 constitutes the housing of whole parts of sealed in unit 700; The characteristic that this provides compactedness, robustness, limited bulk and has assembled easily.

Opening 716 in the shell 714 makes auxiliary winding 712 have the electrical connection path, and it is essential being electrically connected for the operation of the protection equipment that path links with it for auxiliary winding 712.Figure 35-38 shows shell 714 and how advantageously to be arranged to hold another current transducer 715 around leading body (or electric current device of deriving, such as Rogowski (Rogowski) transducer or one group of Hall element), described current transducer 715 is particularly suitable for detecting or measuring current value.In this case, opening 716 has also formed the electrical connection path of this current transducer 715.

Utilize this scheme, power supply unit 700 forms monolithic with current sensor and can be directly and easily be inserted in the enclosure interior of circuit breaker in practice.

Claims (12)

1. electric switch equipment that is used for low-voltage circuit is characterized in that comprising:

-external shell, described external shell accommodate at least one arc chamber, at least one fixed contact and at least one movable contact that is directed to each utmost point bar, and described fixed contact and described movable contact can coupled to each other/decoupling zeros;

-head, described head are directed to each utmost point bar and have at least one bearing, and described bearing is suitable for the movable contact of ccontaining correspondence;

-driving mechanism, described driving mechanism functionally are connected to described head and move to allow described head;

-bracing or strutting arrangement, described bracing or strutting arrangement functionally is connected to described head.

2. equipment according to claim 1, it is characterized in that, described fixed contact comprises: formed body, described formed body has two branches, in described two branches one bendings is equipped with the space between described two branches making above another person, in the described branch one is provided with notch, is inserted with the gasification element in described notch; Isolated component, described isolated component is made by gasification materials alternatively, and described isolated component is positioned in the described space between described two branches.

3. equipment according to claim 1, it is characterized in that, described head comprises a plurality of bearings adjacent one another are, between described bearing, be equipped with first connecting portion and second connecting portion, state bracing or strutting arrangement in described first connecting portion and the described second connecting portion place and functionally be connected to described head, described first connecting portion and described second connecting portion comprise first radial recess and second radial recess respectively.

4. equipment according to claim 3, it is characterized in that, described bracing or strutting arrangement structurally is linked to the structural portion of described driving mechanism and is connected to described head via hinge joining means, and described driving mechanism comprises the head rod and second connecting rod that functionally is connected to described head by means of horizontal drive pin.

5. equipment according to claim 4, it is characterized in that, described bracing or strutting arrangement comprises first support arm and second support arm, and each in described first support arm and described second support arm comprises the second maintenance end that is connected at least one first operating side of described head and is linked to the described structural portion of described driving mechanism by means of described hinge joining means.

6. equipment according to claim 5, it is characterized in that, described first operating side of each support arm is inserted in one in the described radial recess of described head, so that be connected in the described radial recess this by means of described hinge joining means, described hinge joining means is directed to each support arm and comprises rotating dog, and described rotating dog is inserted in first hole that is defined on described first operating side and is inserted in second hole that is arranged on the described head.

7. according to each described equipment in the claim 1 to 6, it is characterized in that described bracing or strutting arrangement comprises end and first cod between the described external shell and second cod that is positioned at described head.

8. according to each described equipment in the claim 1 to 6, it is characterized in that comprise detachable jockey, described detachable jockey is connected to described head with described driving mechanism, described detachable jockey comprises axial connecting rod.

9. according to each described equipment in the claim 1 to 6, it is characterized in that, comprise reinforcement, described reinforcement is positioned in described at least one bearing of described head, and described reinforcement is made by ferromagnetic material.

10. according to each described equipment in the claim 1 to 6, it is characterized in that, comprise the motion tripping mechanism, described motion tripping mechanism functionally is connected to described movable contact and comprises the control member that is suitable for activating described driving mechanism, described motion tripping mechanism is activated by first disengaging movement of described movable contact and described fixed contact and starts described driving mechanism, described driving mechanism is owing to described startup acts on the described movable contact, thereby determined the second quick disengaging movement of described movable contact and described fixed contact.

11. according to each described equipment in the claim 1 to 6, it is characterized in that, comprise and be used for ccontaining and equipment coupling, described annex can link with described switchgear, described ccontaining equipment has molding structure, described molding structure comprises the cable bus of one, described cable bus is used to be electrically connected described annex and the one or more bearings that are used for ccontaining described annex, the cable bus of described one comprises one or more connecting plates and one or more terminal board or terminal, to be connected with described annex or with miscellaneous equipment.

12., it is characterized in that comprise the power supply unit that is used to protect equipment, described power supply unit comprises according to each described equipment in the claim 1 to 6: be suitable for around first magnetic circuit leading body, that be closed path; One section auxiliary winding with described first magnetic circuit as magnetic core; And second magnetic circuit, described second magnetic circuit structurally separates with described first magnetic circuit and functionally links with described first magnetic circuit, make at least a portion of the main flux that produced in described first magnetic circuit by the electric current that circulates in described leading body be received in proportion by described second magnetic circuit, described ratio depends on current value itself.

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