CN102272873B - High performance electric circuit breaker - Google Patents
High performance electric circuit breaker Download PDFInfo
- Publication number
- CN102272873B CN102272873B CN201080004648.6A CN201080004648A CN102272873B CN 102272873 B CN102272873 B CN 102272873B CN 201080004648 A CN201080004648 A CN 201080004648A CN 102272873 B CN102272873 B CN 102272873B
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- Prior art keywords
- circuit
- movable part
- breaker
- fixed part
- support component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
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- Breakers (AREA)
- Push-Button Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Organic Insulating Materials (AREA)
Abstract
A high performance circuit breaker wherein an electric current flows through the first (22) and second (32) contact carrying support. The terminal (24) is crossed by electric current (I1) in a set orientation, whereas the arms (28) are crossed by electric current (I2) having a substantially opposed orientation in an essentially parallel direction, with respect to current (h). The interaction between the currents (I1, 2) generates a repulsive electromagnetic force F which is able to distance the arms from the terminal, creating additional contact pressure between the contacts. Even though the second contact carrying support is crossed by electric current (b) having a substantially opposed orientation in an essentially parallel direction with respect to current (I2), generation of a further electromagnetic force, which would tend to separate the arms from the second contact carrying support, unwanted electromagnetic repulsion between the contacts is avoided by the first (50) and second (70) ferromagnetic shield.
Description
The present invention relates to the technical field of electric equipment, relate more specifically to the circuit-breaker limiting in preorder as claimed in claim 1.
In modern power distribution facility, strongly feel to thering is the demand of the facility of circuit-breaker (it provides optionally characteristic of suitable facility).The selectivity of power distribution facility is necessary, to guarantee as much as possible the maximum service continuity in this facility the fault in the situation that.In fact, after breaking down in distribution network, for example, the in the situation that of short circuit, the mistake forming in electrical network fails to be convened for lack of a quorum to affect and is included in all circuit breakers in this part facility between energy distribution point (being generally medium/low pressure transformer) and fault.
Therefore, in order to guarantee the maximum service continuity of facility and in order farthest to extend the technical life of circuit breaker, need rapidly fault and the circuit breaker isolation that is and then positioned at for example automatic operation type of fault upstream, and require even when fault generates high overcurrent, the circuit breaker that is positioned at the higher level more upstream of this circuit breaker (that is, for) also keeps each electrical contact in the close position.By this way, for not being subject to the electrical network branch of fault effects, in fact guaranteed service continuity.
In the case, should note in the power distribution facility of the above type, conventionally use molded case circuit circuit breaker (molded case electric circuit breaker), it comprise conventionally by fix and movably conductive pad forms fixing and electrical contact movably.In these circuit breakers, fixed bolster be arranged on each shell integrated support component of the external insulation of circuit breaker on, and removable pad is arranged on each support component that is fixed to contact reach.Can operate by suitable actuating mechanism this axle, so that removable pad is in the disconnection with circuit breaker and each operating position corresponding to closure state.About removable pad, particularly, these removable pads are not fixed to contact reach, but to remain supported about the mode of the remaining locomotivity of this axle.At this, its object is to compensate the gap that the wearing and tearing of inevitable misalignment between the fixed bolster of circuit breaker and/or fixed bolster and removable pad cause.Therefore, the fixed bolster of circuit breaker and the suitable contact between removable pad have been realized by this way.
Yet the breaker of plastic casing with the above structure has the fixed bolster of assurance circuit breaker and the quite low current value upper limit suitably electrically contacting between removable pad.In practice, such circuit breaker can not be resisted the caused high overcurrent of fault in the other parts of electrical network.
In fact, when electric current passes circuit breaker, generating intensity electric current increases and the electronic repulsive force of increase, and this electronic repulsive force can make removable pad separated with fixed bolster.By being arranged on the suitable Compress Spring between contact reach and the support component of removable pad, offset the so electronic repulsive force between circuit breaker pad, until reach predetermined current limit value, to guarantee the correct location of removable pad and the suitable contact force between removable pad and fixed bolster.In the situation that be greater than the electronic repulsive force of described limiting value, there is separated between undesirable fixed bolster and removable pad.Even, when the actuating mechanism by corresponding remains on fixed position contact reach, because removable pad as above can move this fact about contact reach, also allow such separation.
For improvement of the scheme of the prior art of the selectivity characrerisitic of circuit-breaker (that is, for increasing due to the current threshold that mutually repels the segregation phenomenon generation causing between fixed bolster and removable pad) substantially based on following two kinds of technology:
-by strengthening Compress Spring, increase the mechanical pressure between removable pad and fixed bolster;
-by use a plurality of support components that each utmost point of circuit breaker is connected in parallel to increase the quantity on electrical contact surface of each utmost point of circuit breaker for removable pad.
Yet the above two kinds of technology has following shortcoming: it causes the performance of the breaker of plastic casing of prior art not reach current required performance in this area.
In fact, in the first situation, thus increase contact force between removable pad and fixed bolster must need to increase actuating mechanism required in order to compress the power needs of Compress Spring increase on the control lever that acts on circuit breaker in order to drive the power of the above actuating mechanism.Due to the normally manual operation of actuating of circuit breaker, therefore known, the power on fixed bolster and removable pad of can being applied to exists because user controls the upper limit that the physical possibility of circuit breaker is forced.
In the second situation, the way that the support component of removable pad is divided into a plurality of parts allows to distribute electric current on a plurality of contact areas, reduces thus the repulsion threshold value of each independent removable pad.Therefore to the mass action of the single utmost point of circuit breaker, be, the repulsion threshold value that has improved whole group of removable pad.Yet, still in the case, exist due to the size of circuit breaker and control the constraint that the required power of circuit breaker causes.In fact, the quantity that increases the support component of removable pad causes that the size of circuit breaker increases on the one hand, and causes that on the other hand the required total power for each utmost point of suitable pressure of the removable pad maintaining on fixed bolster increases.
The above shortcoming causes the breaker of plastic casing of prior art can not maintain current value between removable pad and fixed bolster up to about 20[kA] the suitable contact of (kiloampere).Particularly, such limit is suitable for anything but the requirement of modern electric facility aspect selectivity.Therefore,, in electric facility of modern times, in order to realize higher selective value, need at present to use the circuit breaker that is commonly called " air circuit ".In fact like this it is characterized in that comprising for accumulating the circuit breaker of the mechanism of elastic energy maintained sufficiently high power to compress described Compress Spring with high capacity, thereby maintained electric current between each pad up to the suitable contact of about 100kA.Yet air circuit is characterised in that high size and cost, and it installs complexity with respect to the breaker of plastic casing of the above type and Yan Genggao.
The object of this invention is to provide a kind of circuit-breaker that can solve about the facility of prior art and the above shortcoming of circuit breaker.
Particularly, the object of this invention is to provide a kind of circuit-breaker, it is characterized in that having and allow to be manufactured on such performance that selectivity characrerisitic aspect has high performance electric facility.
More specifically, the object of this invention is to provide a kind of circuit-breaker, it allow to increase guarantees the lowest high-current value of the suitable contact between each electrical contact, and the power applying without the actuating mechanism increasing by circuit breaker.
The form that this object and other object can more be summarized with it by as the circuit-breaker that limits in claims 1 and characterize reach, and with in its specific embodiment some by as in dependent claims the circuit-breaker of restriction and sign reach.
With reference to accompanying drawing, thereby restrictively absolutely not to the following detailed description of the embodiment of the present invention, will more clearly understand the present invention from exemplary, in the accompanying drawings:
-Fig. 1 illustrates the perspective view of molded case circuit circuit breaker;
-Fig. 2 illustrates a perspective view, wherein, and first support component that comprises a plurality of electrical contacts of the circuit breaker of Fig. 1 of the configuration that illustrates to be separated from each other and the circuit breaker first component being associated with this support component;
The perspective view of first support component that comprises Fig. 2 of the configuration that-Fig. 3 illustrates to assemble and the assembly of first component;
-Fig. 4 illustrates the viewgraph of cross-section of the assembly of Fig. 3;
-Fig. 5 illustrates the perspective view of the second support component that comprises a plurality of electrical contacts of the circuit breaker of Fig. 1;
-Fig. 6 illustrates a perspective view, wherein, the contact reach of the circuit breaker of Fig. 1 is shown;
-Fig. 7 illustrates the perspective view of the assembly that comprises the second support component of Fig. 5 and the contact reach of Fig. 6, and this assembly is arranged to the configuration assembling and comprises the actuating mechanism for contact reach;
-Fig. 8 illustrates the perspective view of the assembly of Fig. 7, wherein, from different visual angles, this assembly is shown;
-Fig. 9 illustrates a viewgraph of cross-section, wherein, the assembly of Fig. 3 and the assembly of Fig. 8 with the first operative configuration is partly shown;
-Figure 10 illustrates a viewgraph of cross-section, wherein, the assembly of Fig. 3 and the assembly of Fig. 8 with the second operative configuration is partly shown;
-Figure 11 illustrates viewgraph of cross-section similar to FIG. 10, wherein, by arrow, schematically indicates current path and the electromagnetic force between these contacts of flow through the first support component of Fig. 2 and the second support component of the Fig. 5 that flows through;
-Figure 12 a illustrates a perspective view, wherein, the first support component and the first component of Fig. 2 is shown, and wherein, particularly, illustrates according to second embodiment's and the first support component of being removed of some parts;
The vertical view of the assembly of the parts that comprise Figure 12 a of the configuration that-Figure 12 b illustrates to assemble;
-Figure 12 c illustrates along the viewgraph of cross-section of the assembly of Figure 12 b of the line A-A intercepting of Figure 12 b;
-Figure 13 a illustrates a perspective view, and the first support component and the first component of Fig. 2 shown in it wherein particularly, illustrate according to the 3rd embodiment's and the first support component of being removed of some parts;
The vertical view of the assembly of the parts that comprise Figure 13 a of the configuration that-Figure 13 b illustrates to assemble;
-Figure 13 c illustrates along the viewgraph of cross-section of the assembly of Figure 13 b of the line B-B intercepting of Figure 13 b;
-Figure 13 d illustrates a perspective view, and wherein the parts of Figure 13 a are shown as the configuration assembling;
-Figure 14 a illustrates a perspective view, and the first support component and the first component of Fig. 2 shown in it wherein particularly, illustrate according to the 4th embodiment's and the first support component of being removed of some parts;
The vertical view of the assembly of the parts that comprise Figure 14 a of the configuration that-Figure 14 b illustrates to assemble;
-Figure 14 c illustrates along the viewgraph of cross-section of the assembly of the parts of Figure 14 b of line C '-C ' intercepting of Figure 14 b;
-Figure 14 d illustrates a perspective view, and wherein the parts of Figure 14 a are shown as the configuration assembling;
-Figure 14 e illustrates along the viewgraph of cross-section of the assembly of the parts of Figure 14 b of line C " C " intercepting of Figure 14 b;
-Figure 15 illustrates according to the end view of the first support component of Fig. 2 of the 5th embodiment;
-Figure 16 illustrates according to the end view of the first support component of Fig. 2 of the 6th embodiment, wherein, and the schematic indicator current of arrow and electromagnetic force;
-Figure 17 illustrates the end view of the first support component of Figure 13 a, wherein by the schematic indicator current of arrow and electromagnetic force;
-Figure 18 illustrates according to the perspective view of the first support component of Fig. 2 of the 7th embodiment;
-Figure 19 illustrates the perspective view of the first support component of Figure 18, wherein from different visual angles, this element is shown.
In the accompanying drawings, with identical Reference numeral, represent same or analogous element.
First, with reference to Fig. 1, an exemplary and nonrestrictive embodiment with 1 circuit-breaker representing is shown generally.In the specific embodiment of Fig. 1, circuit breaker 1 is for example so-called breaker of plastic casing, and it is suitable for using in low-voltage distribution facility.In the example illustrating, circuit-breaker 1 includes but not limited to automatic three utmost point breaker of plastic casing.Circuit breaker 1 has the breaker body 3 that comprises the larnacilla shell 5 of being made by insulating material, and breaker body has the function that supports circuit breaker internal mechanism.
Shell 5 has front side 7 and rear side 11, and the action bars 9 that is arranged for operating breaker 7 stretches out from front side, and rear side 11 is provided with the suitable fixture (because itself is known and not shown) for circuit breaker 1 being fixed to Electric switch plate.
On upside 13, shell 5 is provided with for circuit breaker 1 being connected to the input clip (not shown) of the cable of electric facility.On the downside 15 of shell 5, be provided with the output folder (not shown) that is similar to input clip.
With reference to Fig. 2, circuit breaker 1 comprises at least one first electrical contact 20 that is fixed to the first support component 22 or the first contact bearing support part.Preferably, as example as shown in Figure 9, the first support component is fixed to the shell 5 of circuit breaker by screw 22A.Preferably, although in unrestriced mode, the first support component 22 for example, is made by copper or copper alloy (copper-brass alloys).
In the embodiment shown in Figure 2, the first electrical contact 20 comprises a plurality of the first electrical contacts (being four electrical contacts in this example).Preferably, these electrical contacts are manufactured into the shape of the first conductive pad 23.Preferably, these pads are sintering pads of being made by silver alloy.Advantageously, the first contact bearing support part 22 comprises the fixed part 24 that is suitable for being fixed to breaker body 3, and in this example, fixed part 24 is electric terminals.From now on, in the situation that not introducing any restriction, fixed part is also called electric terminal 24.The first contact bearing support part 22 also comprises the movable part 26 that is connected to movably fixed part 24.According to an embodiment, movable part 26 is constrained in terminal 24 rotationally.Particularly, in the example illustrating, movable part 26 is hinged to terminal 24.Should emphasize, movable part 26 is electrically connected to terminal 24.As shown in Figure 2, the first pad 23 is fixed (preferably soldered) to movable part 26.
With reference to the embodiment of Fig. 2, movable part 26 comprises a plurality of arms 28 that are connected to movably fixed part 24, is four arms in this example.According to this embodiment, each arm 28 is provided with the first corresponding pad 23.According to an embodiment, each arm 28 comprises connecting portion 28A (Fig. 4), and connecting portion 28A is suitable for being received in respectively connecting between a pair of wall 29A, the 29B that is defined in terminal 24 (for example,, as shown in the embodiment of Figure 12 a) in recess 29.According to an embodiment, terminal 24 has pectination end, and it comprises a plurality of connection recesses 29 between the tooth that is limited to described comb.According to an embodiment who is particularly suitable for high-power circuit breaker, by cutting (such as by milling etc.), manufacture and connect recess 29.
Referring now to Fig. 5, the second electrical contact 30 of circuit breaker 1 is shown.The second electrical contact 30 is fixed to the second support component 32 or the second contact bearing support part.According to an embodiment, the second electrical contact 30 comprises a plurality of the second electrical contacts (being four contacts in this example).Preferably, these electrical contacts are manufactured into the shape of the second conductive pad 33.Preferably, the second pad 33 is soldered to the second contact bearing support part 32.
According to an embodiment, the second contact bearing support part 32 of being made by electric conducting material comprises and on it, is fixed with the first electric conductor or first plate 35 of the second pad 33 and the second electric conductor or the second plate 37 that is connected to the first plate by means of flexible electrical conductors 39.
The second pad 33 can be taked the first operating position or closed procedure position (Figure 10 and Figure 11) and the second operating position or opening operation position (Fig. 9).Particularly, in closed procedure position, second pad 32 near the first pad 23 so that circuit breaker 1 is arranged to closure state.On the contrary, at open position, the second pad 33 is arranged on apart from the first pad 23 given distances so that circuit breaker 1 is arranged to off-state.
In the case, with reference to Fig. 6-8, note, circuit breaker 1 comprises for allowing the second pad 33 to take respectively the mobile device 40,42 of closed procedure position and opening operation position.According to an embodiment, mobile device comprises contact reach 40 (Fig. 6) and for example, for activating actuating or the operating mechanism 42 (visible at Fig. 7 and Fig. 8 part) of this axle.Particularly, comprise that the contact reach 40 of the second contact bearing support part 32 is suitable for being activated by actuating mechanism 42, to allow the second pad 33 to take closed procedure position (Figure 10) and opening operation position (Fig. 9).Note, although Fig. 1 illustrates three-pole breaker, Fig. 7 and Fig. 8 illustrate for specifically comprising the contact reach of the four-pole circuit breaker of four the second contact bearing support parts 32, as a non-limiting example.Yet obviously those skilled in the art can easily improve the structure of the contact reach 40 of Fig. 7 and Fig. 8, so that it is suitable for having the circuit breaker of the utmost point (that is, the second contact bearing support part 32 of arbitrary number) of arbitrary number.
With reference to Fig. 9 and Figure 10, to note, the arm 28 of the first contact bearing support part 22 is operationally arranged between terminal 24 and the second contact bearing support part 32.
Also, with reference to Fig. 9 and Figure 10, can notice that circuit breaker 1 comprises electromagnetic screen.According to an embodiment, electromagnetic screen comprises at least one first electromagnetic shielding device 50 or the first ferro-magnetic shield part being arranged between arm 28 and the second contact bearing support part 32.According to another embodiment, circuit breaker 1 comprises a plurality of the first ferro-magnetic shield part 50 (not shown), and its number equals the number of the first contact bearing support part 22,, equals the number of the utmost point of circuit breaker 1 that is.
In Fig. 2 and Fig. 3, clearly show that the first embodiment of the first ferro-magnetic shield part 50.In these figure, the first shielding part 50 is shaped to resemble the shell of the end 52 that is suitable for surrounding the first contact bearing support part 22 conventionally.In other words, as seen from Fig., the first ferro-magnetic shield part is advantageously configured as is roughly similar to the shell of sealing terminal 24 and movable part 26.According to an embodiment, the first shielding part 50 comprises operationally at least one shielding wall 54 towards the second contact bearing support part 32.According to an embodiment, this shielding wall 54 approximately extends to the connecting portion 28A (Fig. 4) of arm 28 conventionally from the first pad 23.According to the first embodiment, example as shown in Figure 3, the first shielding part 50 comprises shielding wall 54, be attached to a pair of lateral sidewall of putting in opposite directions of this shielding wall and be attached to this to lateral sidewall and by with respect to this to the anchor portion of wall located lateral or grappling contact pin (tab) 58.Particularly, anchor portion (being two grappling contact pin 58 in this example) is coordinated, to allow the first shielding part 50 to be fixed to the first contact bearing support part 22 with terminal 24.As appreciable from accompanying drawing, make particularly the rear wall (that is, the terminal wall relative with the terminal wall of rear side towards arm 28) of grappling contact pin 58 and terminal 24 couple.According to the embodiment of Fig. 3, the first shielding part 50 specifically comprises for the first shielding part being fixed to the anchoring device of the first contact bearing support part 22.Such anchoring device for example can comprise the hole (not shown) being arranged in grappling contact pin 58, by this hole, can insert suitable anchor screws 59.In other words, the first shielding part 50 is advantageously suitable for removably coupling with the first contact bearing support part 22.
According to another embodiment, electromagnetic screen can comprise at least one additional electromagnetic shield device or the additional ferro-magnetic shield part 60 (Fig. 3 and Fig. 4) that is restrained to movable part 26.According to an embodiment, electromagnetic screen comprises a plurality of additional ferro-magnetic shield parts 60.For example, with reference to Fig. 2, four shield 60 are shown, each is fixed to the counterpart arm 28 of the first contact bearing support part 22.Particularly, considering that each arm 28 has is fixed with the front side of pad 23 and towards the rear side of terminal 24, shield 60 is laterally extended along the side of each arm 28 on it.Still, with reference to Fig. 2, can see that each shield 60 comprises near second each top 62 of pad 23 that is arranged in each arm, has hook-type or curved in this example.
According to an embodiment, electromagnetic screen comprises at least one second electromagnetic shielding device 70 or the second ferro-magnetic shield part (Fig. 9) being arranged between the first shielding part 50 and the second contact bearing support part 32.With reference to Fig. 6, illustrate and the integrated a plurality of secondary shielding parts 70 of contact reach 40, be specially four shielding parts.As seen in the figure, secondary shielding part 70 has separately for receiving the receiving seat 72 of each second contact bearing support part 32.With reference to Fig. 7 and 8, it may be noted that each that make secondary shielding part 70 all surround each pars intermedia the second contact bearing support part 32, that do not comprise the second pad 33.In the embodiment shown in Fig. 7 and Fig. 8, particularly, each secondary shielding part 70 comprises at least one the corresponding shielding wall 74 that approximately extends to flexible electrical conductors 39 since the second pad 33.
Still, with reference to Fig. 2, can see, the first contact bearing support part 22 comprises the first elastic device 80 being arranged between arm 28 and terminal 24.These first elastic devices (example at Fig. 2 comprises spirality Compress Spring 82) are acted on arm 28, with when the second pad 33 arrives their closed procedure position (Figure 10) increase the first pad 23 and the second contact padding between 33.
Describe according to the operation of circuit breaker of the present invention now.
With reference to Fig. 9, wherein, the second pad 33 is shown in opening operation position, it may be noted that the thrust underarm 28 at coil spring 82 is easy to separated with terminal 24.Yet, the removing of arm 28 be subject to these arms can near the restriction of the first shielding part 50.Advantageously, this allows to maintain enough distances between first pad the 23 and second pad 33 of circuit breaker.
With reference to Figure 10, wherein, the second pad 33 is shown in closed procedure position, can notice how the second pad 33 exerts pressure to the first pad, make to resist the effect of spirality Compress Spring 82 and arm 28 is pulled to terminal 24.Particularly, the amplitude of the movement of arm 28 is enough to for example compensate misalignment and/or the wearing and tearing of the first pad 23 and the second pad 33, thereby guarantees the suitable contact between the first pad 23 and the second pad 33.More specifically, the compression of spirality Compress Spring 82 allows the contact force that provides required.
With reference to Figure 11, wherein, circuit breaker is shown in the operating conditions identical with Figure 10, schematically show the overall electric current representing by I, this electric current can pass the first contact bearing support part 22 and the second contact bearing support part 32 under this operating conditions of circuit breaker 1.Particularly, in the figure, it may be noted that and make terminal 24 by the electric current I setting in orientation
1pass, and be oriented while making arm 28 work and through the electric current I of terminal 24
1the orientation electric current I of contrary (and being substantially parallel direction in this example) roughly
2pass.Electric current I
1, I
2between interaction produce the electromagnetic repulsive force F (schematically showing with arrow) can holding arms 28 removing from terminal 24 among Figure 11, contribute to thus the contact increase between the first pad 23 and the second pad 33.Still with reference to Figure 11, yet can see, while making the second contact bearing support part 32 work, be oriented and through the electric current I of arm 28
2the orientation electric current I of contrary (and being substantially parallel direction in this example) roughly
3pass.As can be seen here, these situations cause generation to be easy to another electromagnetic repulsive force that makes arm 28 separated with the second contact bearing support part 32, thereby amplify the rejection in the contact area usually occurring between the first pad 23 and the second pad 33.By the first ferro-magnetic shield part 50 and the second ferro-magnetic shield part 70, can avoid this negative phenomena.In fact, this shielding part 50,70 stops the electric current I by flow through respectively arm 28 and the second contact bearing support part 32 substantially
2, I
3the magnetic field and the above-mentioned Interaction Law of Electric Current that generate.By this way, substantially eliminated other electromagnetic force that may generate, otherwise this can further increase the repulsion between first pad the 23 and second pad 33.
In addition, it is worth mentioning that, shield 60 (if the words that exist) can contribute to produce about maintaining the first pad 23 and the second positive effect contacting padding between 33.In fact, by shield 60 is attracted or pulls to the first shielding part 50 shield 60 is coordinated with the first shielding part 50 electromagnetism.More specifically, shield can interact to basically form mode and first shielding part 50 of electromagnet/armature (armature) coupling, and wherein the first shielding part 50 is electromagnets, and shield 60 is armature.Therefore, make it possible to generate electromagnetic force, electromagnetic force is inhaled to the first shielding part 50 by arm 28 and is helped thus to maintain the contact between the first pad 23 and the second pad 33.
Content based on having described, therefore can understand according to circuit breaker of the present invention, how can solve above-described about shortcoming of the prior art.
Particularly, note, in circuit breaker according to the present invention, the thrust applying due to movable part 26, therefore maintains the suitable contact between the first and second pads of circuit breaker without the additional force from actuating mechanism.
Advantageously, in circuit breaker according to the present invention, the identical thrust applying for actuating mechanism, the threshold value of the electric current that the first pad 23 of the circuit breaker that can obviously raise with respect to the circuit breaker of prior art is separated with the second pad 33 generations.Particularly, even in the situation that guarantee that electric current between the pad of circuit breaker is up to 40 kiloamperes and above suitable contact thereof, the characteristic of circuit breaker according to the present invention aspect selectivity also has highly improvement for current commercially available prod.
Therefore,, by circuit breaker according to the present invention, by means of using size and cost with respect to the circuit breaker that for example current air circuit obviously reduces, can meet the selectivity requirement of modern distribution facility completely.
It shall yet further be noted that in the circuit breaker of the above type, owing to there not being the additional electrical magnetic force of determining the direct attraction between fixed bolster and removable pad, so do not exist resistance by the power of the automatic disconnection of the circuit breaker of actuating mechanism.Therefore, do not reduce circuit breaker relevant with short interruption ability performance.In the case, note, be suitable for movable part 26 to inhale to the first ferro-magnetic shield part electromagnetic force (that is, inhaling to the second contact bearing support part 32), that generate between shield 60 and the first ferro-magnetic shield part 50 and do not revolt the automatic disconnection by the circuit breaker of actuating mechanism.Therefore, this characteristic advantageously allows to improve the selectivity characrerisitic of circuit breaker in addition, and does not reduce or the control of negative infringement to circuit breaker.
Note, the concrete structure of the first ferro-magnetic shield part (it is substantially shaped to resemble and is suitable for surrounding first fixed part of contact bearing support part and the shell of movable part 26) is except allowing the best electromagnetic shielding of the first contact bearing support part, also advantageously simplified to comprise the first contact bearing support part and the first electromagnetic shield assembly assembling and this assembly is installed to the installation being arranged in the corresponding mounting shell of circuit breaker inside.
In addition, this configuration that should note the first ferro-magnetic shield part produces multi-functional ferro-magnetic shield part, it,, except providing aspect corresponding electromagnetic shielding especially effectively, also allows to maintain the first pad of circuit breaker and the preset distance between the second pad when the second pad is arranged on open position.Particularly, this allows to obtain this effective especially structure of the assembly and the thus obtained circuit breaker that comprise the first shielding part and the first contact bearing support part.
Below, some that describe according to circuit breaker of the present invention are revised, and these are revised only as non-limiting example.
According to circuit breaker 1 embodiment, it can comprise for strengthening the device of the conductivity between terminal 24 and arm 28.Particularly, such device is arranged between terminal and arm 28.
With reference to Fig. 2, for strengthening the device of conductivity, can comprise the swivel pin 100 for hinged terminal 24 and arm 28.Advantageously, sell 100 and can be made by high conductive material, preferably but without limitation such as there being the copper of silvering.
With reference to the particularly advantageous embodiment shown in Figure 12 a to 12c, swivel pin 100 comprises a plurality of swivel pins 102 of aiming at along same hinge axes X.As seen from Figure 12 a-12c, swivel pin 100 can be subdivided into a plurality of shorter swivel pin 102 for for example hinged each arm 28.By this way, with respect to the situation of only using a swivel pin 100, can advantageously increase the total number of the contact area between swivel pin 100 and terminal 24.
According to an embodiment, as to the additional of the content of previously and subsequently having described and having illustrated or substitute, for strengthening the device of conductivity, can comprise the second elastic device that is suitable for engaging arms 28, to increase the contact between described arm and terminal 24.With reference to the embodiment shown in Figure 14 a to 14e, the second elastic device comprises at least one disk spring (belleville spring) 104, and disk spring 104 is arranged on each arm 28 and is respectively connected between wall 29A, the 29B of recess 29 with restriction.More specifically, in this embodiment, for example, provide disk spring 104, disk spring 104 is located in and respectively connects between one of arm 29A, the 29B of recess 29 and the connecting portion 28A of each arm 28.According to the embodiment shown in Figure 13 a to 13d, terminal 24 can comprise widens connection recess 29, each is widened and connect the connecting portion 28A that recess 29 is received a pair of arm 29.In the example illustrating, particularly, a pair of disk spring 104 is arranged on to be received in respectively to be widened between two arms 28 that connect among recess 29.
According to being considered to, to and the content that will describe additional or an embodiment substituting, for strengthening the device of conductivity, can comprise at least one the flexible conductive element (not shown) that is connected respectively to terminal 24 and arm 28.
According to being considered to and the content that will describe additional or an embodiment substituting, the first elastic device 80 can comprise the dissimilar spring with respect to spirality Compress Spring 82 (Fig. 2).For example, with reference to the embodiment of Figure 15, the use to sheet spring 110 is shown, preferably each arm 28 is used to a sheet spring 110.
According to another embodiment, the first elastic device 80 can comprise stiff spring, substitutes Compress Spring.For example, in the embodiment of Figure 18 and Figure 19, the use to spirality extension spring 112 is shown.Particularly, such spring 112 has one end to be connected to the hook pin 114 of terminal 24, and the other end is connected to arm 28.
According to being considered to and the content that will describe and illustrate additional or an embodiment substituting, the first contact bearing support part 22 advantageously comprises the electric insulation arrangement being arranged between arm 28 and terminal 24.For example, with reference to the embodiment shown in Figure 13 d and 14d, the electric insulation arrangement 120,122 being arranged between arm 28 and the first elastic device 80 is shown, to avoid these elastic devices charged and thereby can damage due to overheated.
According to being considered to and the content that will describe and illustrate additional or the particularly advantageous embodiment that substitutes, the first contact bearing support part 22 comprises the electric current I for make to flow through respectively terminal 24 and arm 28
1, I
2device close to each other.According to an embodiment, for making electric current device close to each other comprise the material thickness reduction 130 (Figure 17) of terminal 24.For example can form material thickness reduction 130 by the groove 132 being arranged in the side relative with arm 28 of terminal 24.With reference to Figure 16 and Figure 17, two embodiment of the first contact bearing support part 22 are shown, there is respectively and do not have material thickness reduction 130.In these figure, arrow schematically shows the electric current I of flow through terminal 24 and arm 29
1, I
2, and such element between the electromagnetic repulsive force F that generates.Particularly, in these figure, the intensity of electromagnetic repulsive force F is directly proportional with the number of corresponding arrow.Relatively Figure 16 and Figure 17, can find out the electric current I that forces the terminal 24 of flowing through due to material thickness reduction 130
1approach the electric current I of the arm 28 of flowing through
2, make to realize the increase of the electromagnetic repulsive force F between terminal 24 and arm 28.
According to being considered to and the content that will describe and illustrate additional or the economic especially embodiment that substitutes, the first contact bearing support part 22 comprises the quick coupling device that for even not needing tool using, the first ferro-magnetic shield part 50 is removably couple to the first contact bearing support part 22.
For example, with reference to Figure 16,17 and the embodiment of 14e, this quick coupling device comprises the quick engagement recesses 140 being arranged on terminal 24.
For example, with reference to Figure 14 e, when the first shielding part 50 is coupled to the first contact bearing support part 22, the grappling contact pin 58 of the first shielding part is received within quick engagement recesses 140.More specifically, under this situation, because arm 28 is applied to the pressure on the first shielding part 50 by the first elastic device 80, so the first shielding part 50 is still firmly connected to the first contact bearing support part.
In the time of in such assembly is not installed to circuit breaker 1, can easily move this assembly thus, and there is no the unexpected danger departing from.
At described assembly, be installed to circuit breaker 1 with after interior, in suitable mount pad (not shown), when arm 28 does not contact the first shielding part 50, the structure of mount pad stops the first shielding part 50 and the first contact bearing support part 22 to depart from.
With reference to Figure 18 and Figure 19, an embodiment of the first contact bearing support part 22 is shown, it is particularly suitable for low-voltage circuit breaker.In these circuit breakers, wherein the thickness of terminal 24 is relatively little, and in fact can form by two parts 150 of jogged terminal end 24 and define wall 29A, the 29B that connects recess 29, rather than by the machining such as cutting.
It should be noted that with reference to electricity (single-breaking) breaker of plastic casing that singly opens circuit and only with exemplary approach, described the present invention.Yet those skilled in the art can easily use instruction of the present invention in the situation of different types of circuit breaker (particularly, such as double-break breaker of plastic casing).
Based on principle of the present invention, in the situation that do not deviate from the scope of the invention that claims limit, for as content non-limiting example, that described and illustrated, can change widely embodiment and structure detail.
Claims (18)
1. a circuit-breaker (1), comprising:
-breaker body (3);
-at least one first electrical contact (20);
-at least one first support component (22) of described the first electrical contact (20), comprise the fixed part (24) that is suitable for being fixed to described breaker body (3);
-be suitable for taking at least one second electrical contact (30) of the first closed procedure position and opening operation position, its in described the first closed procedure position near described the first electrical contact (20) so that described circuit breaker (1) is arranged to closure state, and in described opening operation position, it is arranged on respect to the given distance of described the first electrical contact (20) described circuit breaker (1) is arranged to off-state;
-at least one second support component (32) of described the second electrical contact (30); And
The mobile device (40) of-described the second support component (32), it is for allowing described the second electrical contact (30) to take respectively described closed procedure position and described opening operation position;
Described the first support component (22) comprises movable part (26), and described movable part comprises described the first electrical contact (20) and is connected to movably described fixed part (24);
Described circuit breaker is characterised in that, it comprises electromagnetic screen (50,60,70), described electromagnetic screen (50,60,70) comprises at least one the first electromagnetic shielding device (50) being arranged between described movable part (26) and described the second support component (32), and wherein said the first electromagnetic shielding device (50) is substantially shaped to resemble and is applicable to surrounding the described fixed part (24) of described the first support component (22) and the shell of described movable part (26).
2. circuit-breaker according to claim 1 (1), wherein said movable part (26) is constrained in described fixed part (24) rotationally.
3. according to the circuit-breaker (1) described in arbitrary aforementioned claim, wherein said movable part (26) is operationally arranged between described fixed part (24) and described the second support component (32).
4. circuit-breaker according to claim 1 and 2 (1), while wherein making described fixed part (24) work by the electric current (I setting in orientation
1) pass, wherein, described movable part (26) is oriented and orientation through the electric current of described fixed part (24) contrary electric current (I substantially
2) pass, wherein, at described electric current (I
1, I
2) between interaction generate and to be suitable for electromagnetic repulsive force (F) that described movable part (26) is removed from described fixed part (24).
5. circuit-breaker according to claim 4 (1), wherein said the first support component (22) comprises the described electric current (I for make to flow through respectively described fixed part (24) and described movable part (26)
1, I
2) device (130,132) close to each other.
6. circuit-breaker according to claim 1 and 2 (1), wherein said the first electromagnetic shielding device (50) comprise operationally towards at least one shielding wall (54) of described the second support component (32), be attached to a pair of lateral sidewall of relatively putting of described shielding wall (54) and be attached to described a pair of lateral sidewall and by with respect to this to the anchor portion of wall located lateral (58), described anchor portion (58) is coordinated with described fixed part (24) with permission described the first electromagnetic shielding device (50) is fixed to described the first support component (22).
7. circuit-breaker according to claim 1 and 2 (1), wherein makes described movable part (26) near described the first electromagnetic shielding device (50).
8. circuit-breaker according to claim 1 and 2 (1), wherein makes described the first electromagnetic shielding device (50) removably be couple to described the first support component (22).
9. circuit-breaker according to claim 1 and 2 (1), wherein said electromagnetic screen (50,60,70) comprises at least one the additional electromagnetic shield device (60) that is restrained to described movable part (26), and the mode that described additional electromagnetic shield device (60) is suitable for being attracted to described the first electromagnetic shielding device (50) coordinates with described the first electromagnetic shielding device (50) electromagnetism.
10. circuit-breaker according to claim 1 and 2 (1), comprise the first elastic device (82,110,112) being arranged between described fixed part (24) and described movable part (26), it is upper that described the first elastic device (82,110,112) is suitable for acting on described movable part (26), to increase the contact between described the first electrical contact (20) and described the second electrical contact (30) when described the second electrical contact (30) arrives described the first closed procedure position.
11. circuit-breakers according to claim 10 (1), comprise the electric insulation arrangement (120,122) being arranged between described fixed part (24) and described movable part (26).
12. circuit-breakers according to claim 1 and 2 (1), comprise for strengthening the device (100,102,104) of the conductivity between described fixed part (24) and described movable part (26), describedly for strengthening the device (100,102,104) of conductivity, be arranged between described fixed part and described movable part (24,26).
13. circuit-breakers according to claim 12 (1), wherein said for strengthen the device (100,102,104) of conductivity comprise conduction swivel pin (100), for described fixed part (24) and described movable part (26) is hinged each other.
14. circuit-breakers according to claim 13 (1), wherein said swivel pin (100) comprises a plurality of swivel pins (102) of aiming at along same hinge axes (X).
15. circuit-breakers according to claim 12 (1), wherein saidly for strengthening the device (100,102,104) of conductivity, comprise the second elastic device (104), described the second elastic device is suitable for engaging described movable part to increase the contact between described movable part (26) and described fixed part (24).
16. circuit-breakers according to claim 12 (1), wherein saidly comprise for strengthening the described device (100,102,104) of conductivity at least one elastic conductive component that is connected respectively to described fixed part (24) and described movable part (26).
17. circuit-breakers according to claim 1 and 2 (1), comprise for even described the first electromagnetic shielding device (50) being removably couple to without tool using to the quick coupling device (140) of described the first support component (22).
18. circuit-breakers according to claim 1 and 2 (1), wherein said fixed part (24) comprises at least one pair of wall (29A, 29B) that limits connection recess (29), described connection recess (29) is for receiving the connecting portion (29A) of described movable part (26), and described at least one pair of wall (29A, 29B) forms by crooked.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITRM2009A000009 | 2009-01-12 | ||
| ITRM2009A000009A IT1392729B1 (en) | 2009-01-12 | 2009-01-12 | HIGH PERFORMANCE ELECTRICAL SWITCH |
| PCT/IT2010/000004 WO2010079524A1 (en) | 2009-01-12 | 2010-01-12 | High performance electric circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102272873A CN102272873A (en) | 2011-12-07 |
| CN102272873B true CN102272873B (en) | 2014-03-05 |
Family
ID=40933645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080004648.6A Expired - Fee Related CN102272873B (en) | 2009-01-12 | 2010-01-12 | High performance electric circuit breaker |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2377134B1 (en) |
| CN (1) | CN102272873B (en) |
| CO (1) | CO6341679A2 (en) |
| IT (1) | IT1392729B1 (en) |
| MX (1) | MX2011006923A (en) |
| RU (1) | RU2486621C2 (en) |
| WO (1) | WO2010079524A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170651B (en) * | 2016-03-07 | 2019-09-06 | 浙江正泰电器股份有限公司 | The turning gear of breaker |
| CN109285732B (en) * | 2018-11-30 | 2024-02-13 | 武汉长海电气科技开发有限公司 | DC contactor and contact structure thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1268047A (en) * | 1960-08-12 | 1961-07-28 | Elektro App Werke Veb | Electro-dynamic device used to actuate the switching elements of an electrical switch, in particular a circuit breaker |
| GB1451958A (en) * | 1973-05-03 | 1976-10-06 | Mte Components Lt | Electrical switches |
| DE2615726A1 (en) * | 1976-04-10 | 1977-10-27 | Bbc Brown Boveri & Cie | Contact system for circuit breakers - has moving contact with switching force boosted by directly associated ferromagnetic member |
| SU974440A1 (en) * | 1980-10-04 | 1982-11-15 | Ленинградский Ордена Ленина Политехнический Институт Им.М.И.Калинина | High-voltage electric apparatus |
| JPS603829A (en) * | 1983-06-21 | 1985-01-10 | 富士電機株式会社 | Circuit breaker |
| SU1439688A1 (en) * | 1987-04-24 | 1988-11-23 | В.В„Кли.мов | Disconnector |
| EP1207544B1 (en) * | 2000-11-17 | 2006-06-14 | ABB Schweiz AG | Contact area for a circuit breaker |
| RU27971U1 (en) * | 2002-09-04 | 2003-02-27 | Открытое акционерное общество "Электроавтомат" | CIRCUIT BREAKER |
-
2009
- 2009-01-12 IT ITRM2009A000009A patent/IT1392729B1/en active
-
2010
- 2010-01-12 RU RU2011133817/07A patent/RU2486621C2/en not_active IP Right Cessation
- 2010-01-12 CN CN201080004648.6A patent/CN102272873B/en not_active Expired - Fee Related
- 2010-01-12 WO PCT/IT2010/000004 patent/WO2010079524A1/en active Application Filing
- 2010-01-12 EP EP20100706763 patent/EP2377134B1/en active Active
- 2010-01-12 MX MX2011006923A patent/MX2011006923A/en active IP Right Grant
-
2011
- 2011-07-12 CO CO11086671A patent/CO6341679A2/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN102272873A (en) | 2011-12-07 |
| EP2377134B1 (en) | 2014-11-12 |
| RU2486621C2 (en) | 2013-06-27 |
| CO6341679A2 (en) | 2011-11-21 |
| WO2010079524A1 (en) | 2010-07-15 |
| EP2377134A1 (en) | 2011-10-19 |
| MX2011006923A (en) | 2011-07-29 |
| RU2011133817A (en) | 2013-02-20 |
| ITRM20090009A1 (en) | 2010-07-13 |
| IT1392729B1 (en) | 2012-03-16 |
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Granted publication date: 20140305 Termination date: 20180112 |