CN102272873A - High performance electric circuit breaker - Google Patents
High performance electric circuit breaker Download PDFInfo
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- CN102272873A CN102272873A CN2010800046486A CN201080004648A CN102272873A CN 102272873 A CN102272873 A CN 102272873A CN 2010800046486 A CN2010800046486 A CN 2010800046486A CN 201080004648 A CN201080004648 A CN 201080004648A CN 102272873 A CN102272873 A CN 102272873A
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- Prior art keywords
- breaker
- circuit
- movable part
- 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 electric apparatus technology, relate more specifically to the circuit-breaker that limits in the preorder as claimed in claim 1.
In modern power distribution facility, feel demand to facility strongly with circuit-breaker (it provides optionally characteristic of suitable facility).The selectivity of power distribution facility is necessary, to guarantee the maximum service continuity in this facility as much as possible under the situation of fault.In fact, after breaking down in distribution network, for example under the situation of short circuit, the mistake that forms in the electrical network influence that fails to be convened for lack of a quorum is included in all circuit breakers in this part facility between energy distribution point (in being generally/low-tension transformer) and the fault.
Therefore, for the maximum service continuity that guarantees facility and in order farthest to prolong the technical life of circuit breaker, need apace fault and for example circuit breaker of the action type isolation automatically that and then is positioned at the 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, at) also keeps each electrical contact to be in the close position.By this way, for the electrical network branch that is not subjected to fault effects, in fact guaranteed service continuity.
In the case, should note in the power distribution facility of the above type, usually use molded case circuit circuit breaker (molded case electric circuit breaker), it comprises usually by fixing and movably constitute fixing of conductive pad and movably electrical contact.In these circuit breakers, fixed bolster be set at each shell integrated support component of the external insulation of circuit breaker on, and removable pad is set on each support component that is fixed to the contact reach.Can operate this axle by suitable actuating mechanism, so that removable pad is in disconnection and each corresponding operating position of closure state with circuit breaker.About removable pad, particularly, these removable pads are not fixed to the contact reach, but supported to keep about this mode of remaining locomotivity.At this, its purpose 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 the 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 that suitably electrically contacts between the removable pad.In the practice, such circuit breaker can not be resisted by the caused high overcurrent of the fault in the other parts of electrical network.
In fact, when electric current passes circuit breaker, generate the electronic repulsive force that intensity increases with electric current, this electronic repulsive force can make removable pad separate with fixed bolster.By the proper compression spring between the support component that is arranged on contact reach and removable pad, offset the so electronic repulsive force between the circuit breaker pad, up to reaching the predetermined current limiting value, with the correct location that guarantees removable pad and the suitable contact force between removable pad and the fixed bolster.Under the situation greater than the electronic repulsive force of described limiting value, appear separating between undesirable fixed bolster and the removable pad.Even when the actuating mechanism by correspondence remains on the fixed position to the contact reach,, also allow such separation because aforesaid removable pad can move this fact about the contact reach.
The scheme of prior art of selectivity characrerisitic (that is, being used to increase owing to the current threshold that repels the segregation phenomenon generation that causes between fixed bolster and the removable pad mutually) that is used to improve circuit-breaker is basically based on following two kinds of technology:
-increase mechanical pressure between removable pad and the fixed bolster by strengthening the compression spring;
-a plurality of support components of being connected in parallel by each utmost point that removable pad is used to circuit breaker increase the quantity on electrical contact surface of each utmost point of circuit breaker.
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, under first kind of situation, thus increase contact force between removable pad and the fixed bolster must need to increase on the control lever that required power the needs increase in order to compression compression spring of actuating mechanism acts on circuit breaker in order to drive the power of the above actuating mechanism.Because the normally manual operation of actuating of circuit breaker, therefore as can be known, the power on fixed bolster and the removable pad of can being applied to exists owing to the user controls the upper limit that the physical possibility of circuit breaker is forced.
Under second kind of 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 the repulsion threshold value of each independent removable pad thus.Therefore, the mass action to the single utmost point of circuit breaker is the repulsion threshold value that has improved whole group of removable pad.Yet, still in the case, exist because 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 on the one hand the size of circuit breaker increases, and causes that on the other hand the required total power at each utmost point of suitable pressure of the removable pad of keeping on the fixed bolster increases.
The above shortcoming causes the breaker of plastic casing of prior art can not keep current value between removable pad and the fixed bolster up to about 20[kA] the suitable contact of (kiloampere).Particularly, such limit is suitable for the requirement of modern electric facility anything but aspect selectivity.Therefore, in electric facility of modern times,, need to use the circuit breaker that is commonly called " air circuit " at present in order to realize higher selective value.In fact the circuit breaker that like this it is characterized in that comprising is used to accumulate the mechanism of elastic energy has kept sufficiently high power compressing described compression spring with high capacity, thereby has kept 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 purpose of this invention is to provide a kind of circuit-breaker that can solve about the above shortcoming of the facility of prior art and circuit breaker.
Particularly, the purpose 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 the selectivity characrerisitic aspect has high performance electric facility.
More specifically, the purpose 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 need not to increase the power that the actuating mechanism by circuit breaker applies.
This purpose and other purpose can with its form of more summarizing by as the circuit-breaker that limits in the claims 1 and characterize reach, and with in its specific embodiment some by as in the dependent claims circuit-breaker of qualification and sign reach.
With reference to accompanying drawing, thereby will more be expressly understood the present invention from exemplary restrictive absolutely not following detailed description to the embodiment of the invention, in the accompanying drawings:
-Fig. 1 illustrates the perspective view of molded case circuit circuit breaker;
-Fig. 2 illustrates a perspective view, wherein, illustrates with first support component that comprises a plurality of electrical contacts of the circuit breaker of Fig. 1 of the configuration that is separated from each other and circuit breaker first parts that are associated with this support component;
-Fig. 3 illustrates the perspective view with the assembly of first support component that comprises Fig. 2 of the configuration that assembles and first parts;
-Fig. 4 illustrates the viewgraph of cross-section of the assembly of Fig. 3;
-Fig. 5 illustrates the perspective view of 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 assembly of the contact reach of second support component that comprises Fig. 5 and Fig. 6, and this assembly is arranged to the configuration that assembles and comprises the actuating mechanism that is used for the 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, partly illustrates with the assembly of Fig. 3 of first operative configuration and the assembly of Fig. 8;
-Figure 10 illustrates a viewgraph of cross-section, wherein, partly illustrates with the assembly of Fig. 3 of second operative configuration and the assembly of Fig. 8;
-Figure 11 illustrates viewgraph of cross-section similar to FIG. 10, wherein, schematically indicates the current path and the electromagnetic force between these contacts of second support component of flow through first support component of Fig. 2 and the Fig. 5 that flows through by arrow;
-Figure 12 a illustrates a perspective view, wherein, first support component and first parts of Fig. 2 is shown, and wherein, particularly, illustrates according to second embodiment's and first support component that is removed of some parts;
-Figure 12 b illustrates the vertical view with the assembly of the parts that comprise Figure 12 a of the configuration that assembles;
-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 first support component of Fig. 2 shown in it and first parts wherein particularly, illustrate according to the 3rd embodiment's and first support component that is removed of some parts;
-Figure 13 b illustrates the vertical view with the assembly of the parts that comprise Figure 13 a of the configuration that assembles;
-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 that assembles;
-Figure 14 a illustrates a perspective view, and first support component of Fig. 2 shown in it and first parts wherein particularly, illustrate according to the 4th embodiment's and first support component that is removed of some parts;
-Figure 14 b illustrates the vertical view with the assembly of the parts that comprise Figure 14 a of the configuration that assembles;
-Figure 14 c illustrates the viewgraph of cross-section of assembly of parts of Figure 14 b of the line C '-C ' intercepting along Figure 14 b;
-Figure 14 d illustrates a perspective view, and wherein the parts of Figure 14 a are shown as the configuration that assembles;
-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 the end view according to first support component of Fig. 2 of the 5th embodiment;
-Figure 16 illustrates the end view according to first support component of Fig. 2 of the 6th embodiment, wherein, and schematic indicator current of arrow and electromagnetic force;
-Figure 17 illustrates the end view of first support component of Figure 13 a, wherein by schematic indicator current of arrow and electromagnetic force;
-Figure 18 illustrates the perspective view according to first support component of Fig. 2 of the 7th embodiment;
-Figure 19 illustrates the perspective view of first support component of Figure 18, wherein from different visual angles this element is shown.
In the accompanying drawings, represent same or analogous element with identical Reference numeral.
At first, with reference to Fig. 1, an exemplary and nonrestrictive embodiment with 1 circuit-breaker of representing is shown generally.In the specific embodiment of Fig. 1, circuit breaker 1 for example is so-called breaker of plastic casing, and it is suitable for using in the low-voltage distribution facility.In the example that illustrates, 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 of being made by insulating material 5, and breaker body has the function that supports the circuit breaker internal mechanism.
Shell 5 has front side 7 and rear side 11, and the action bars 9 that is set for operating breaker 7 stretches out from the front side, and rear side 11 is provided with the suitable fixture (because itself is known and not shown) that is used for circuit breaker 1 is fixed to Electric switch plate.
On upside 13, shell 5 is provided with the input clip (not shown) that is used for circuit breaker 1 is connected to the cable of electric facility.The downside 15 of shell 5 is 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 first support component 22 or first contact carrying strutting piece.Preferably, as shown in for example Fig. 9, first support component is fixed to the shell 5 of circuit breaker by screw 22A.Preferably, although in unrestriced mode, first support component 22 is made by copper or copper alloy (for example copper-brass alloys).
In the embodiment shown in Figure 2, first electrical contact 20 comprises a plurality of first electrical contacts (being four electrical contacts in this example).Preferably, these electrical contacts are manufactured into the shape of first conductive pad 23.Preferably, these pads are sintering pads of being made by silver alloy.Advantageously, first contact carrying strutting piece 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, under the situation of not introducing any restriction, fixed part is also called electric terminal 24.First contact carrying strutting piece 22 also comprises the movable part 26 that is connected to fixed part 24 movably.According to an embodiment, movable part 26 is constrained in terminal 24 rotationally.Particularly, in the example that illustrates, movable part 26 is hinged to terminal 24.What should emphasize is that movable part 26 is electrically connected to terminal 24.As shown in Figure 2, 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 fixed part 24 movably, 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 the recess 29.According to an embodiment, terminal 24 has the 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, make by cutting (for example by milling etc.) and to connect recess 29.
Referring now to Fig. 5, second electrical contact 30 of circuit breaker 1 is shown.Second electrical contact 30 is fixed to second support component 32 or second contact carrying strutting piece.According to an embodiment, second electrical contact 30 comprises a plurality of second electrical contacts (being four contacts in this example).Preferably, these electrical contacts are manufactured into the shape of second conductive pad 33.Preferably, second pad 33 is soldered to second contact carrying strutting piece 32.
According to an embodiment, second contact carrying strutting piece of being made by electric conducting material 32 comprises first electric conductor or first plate 35 that is fixed with second pad 33 on it and second electric conductor or second plate 37 that is connected to first plate by means of flexible electrical conductors 39.
In the case,, notice that circuit breaker 1 comprises and is used to allow second pad 33 to take the mobile device 40,42 of closed procedure position and opening operation position respectively with reference to Fig. 6-8.According to an embodiment, mobile device comprises contact reach 40 (Fig. 6) and is used for activating this actuating or operating mechanism 42 (for example visible at Fig. 7 and Fig. 8 part).Particularly, comprise that the contact reach 40 of second contact carrying strutting piece 32 is suitable for being activated by actuating mechanism 42, take closed procedure position (Figure 10) and opening operation position (Fig. 9) to allow second pad 33.Notice that although Fig. 1 illustrates three-pole breaker, exemplary the illustrating of Fig. 7 and Fig. 8 is used for specifically comprising that four second contacts carry the contact reach of the four-pole circuit breaker of strutting pieces 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 second contact of arbitrary number carrying strutting piece 32) of arbitrary number.
With reference to Fig. 9 and Figure 10, notice that the arm 28 of first contact carrying strutting piece 22 operationally is arranged between terminal 24 and second contact carrying strutting piece 32.
Also, can notice that circuit breaker 1 comprises electromagnetic screen with reference to Fig. 9 and Figure 10.According to an embodiment, electromagnetic screen comprises at least one the first electromagnetic shielding device 50 or the first ferro-magnetic shield part that is arranged between arm 28 and second contact carrying strutting piece 32.According to another embodiment, circuit breaker 1 comprises a plurality of first ferro-magnetic shield part, 50 (not shown), and its number equals the number of first contact carrying strutting piece 22,, equals the number of the utmost point of circuit breaker 1 that is.
Clearly show that first embodiment of the first ferro-magnetic shield part 50 among Fig. 2 and Fig. 3.In these figure, first shielding part 50 is shaped to resemble usually and is suitable for surrounding the shell that first contact carries the end 52 of strutting piece 22.In other words, as seen from the figure, the first ferro-magnetic shield part advantageously is configured as roughly is similar to the shell of sealing terminal 24 and movable part 26.According to an embodiment, first shielding part 50 comprises at least one shielding wall 54 that operationally carries strutting piece 32 towards second contact.According to an embodiment, this shielding wall 54 approximately extends to the connecting portion 28A (Fig. 4) of arm 28 usually from first pad 23.According to first embodiment, for example shown in Figure 3, 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 anchor portion or grappling contact pin (tab) 58 to the wall located lateral.Particularly, make anchor portion (being two grappling contact pin 58 in this example) cooperate, be fixed to first contact carrying strutting piece 22 to allow first shielding part 50 with terminal 24.As appreciable, make the rear wall (that is, with towards the rear side of arm 28 the relative terminal wall of terminal wall) of grappling contact pin 58 and terminal 24 couple particularly from accompanying drawing.According to the embodiment of Fig. 3, first shielding part 50 specifically comprises the anchoring device that is used for first shielding part is fixed to first contact carrying strutting piece 22.Such anchoring device for example can comprise the hole (not shown) that is arranged in the grappling contact pin 58, can insert suitable anchor screws 59 by this hole.In other words, first shielding part 50 advantageously is suitable for removably coupling with first contact carrying strutting piece 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 first contact carrying strutting piece 22.Particularly, considering that each arm 28 has is fixed with pad 23 front side and towards the rear side of terminal 24, shield 60 is laterally extended along the side of each arm 28 on it.Still, can see that each shield 60 comprises near second each top 62 of filling up 23 that is arranged in each arm, has hook-type or curved in this example with reference to Fig. 2.
According to an embodiment, electromagnetic screen comprises at least one the second electromagnetic shielding device 70 or the second ferro-magnetic shield part (Fig. 9) that is arranged between first shielding part 50 and second contact carrying strutting piece 32.With reference to Fig. 6, illustrate and contact reach 40 incorporate a plurality of secondary shielding spares 70, be specially four shielding parts.As seeing in the figure, secondary shielding spare 70 has the admittance seat 72 that is used to admit each second contact carrying strutting piece 32 separately.With reference to Fig. 7 and 8, it may be noted that to make each of secondary shielding spare 70 all surround pars intermedia each second contact carrying strutting piece 32, that do not comprise second pad 33.In Fig. 7 and embodiment shown in Figure 8, particularly, each secondary shielding spare 70 comprises at least one the corresponding shielding wall 74 that approximately extends to flexible electrical conductors 39 since second pad 33.
With reference to Fig. 2, can see that still first contact carrying strutting piece 22 comprises first elastic device 80 that is arranged between arm 28 and the terminal 24.Make these first elastic devices (in the example of Fig. 2, comprising spirality compression spring 82) act on the arm 28, with the contact pressure between (Figure 10) increase first pad 23 and second pad 33 when second pad 33 arrives their closed procedure position.
Operation according to circuit breaker of the present invention is described now.
With reference to Fig. 9, wherein, second pad 33 is shown is in the opening operation position, it may be noted that the thrust underarm 28 at coil spring 82 is easy to separate with terminal 24.Yet, the removing of arm 28 be subjected to these arms can near the restriction of first shielding part 50.Advantageously, this allows to keep enough distances between first pad, 23 and second pad 33 of circuit breaker.
With reference to Figure 10, wherein, second pad is shown 33 is in the closed procedure position, can notice how second pad 33 exerts pressure to first pad, make opposing spirality compression spring 82 effect and arm 28 is pulled to terminal 24.Particularly, the amplitude that moves of arm 28 is enough to for example compensate the misalignment and/or the wearing and tearing of first pad, 23 and second pad 33, thereby guarantees the suitable contact between first pad, 23 and second pad 33.More specifically, the compression of spirality compression spring 82 allows the contact force that provides required.
With reference to Figure 11, wherein, circuit breaker is shown is in and Figure 10 identical operations situation, schematically show electric current by the overall expression of I, this electric current can pass first contact carrying strutting piece 22 and second contact carrying strutting piece 32 under this operating conditions of circuit breaker 1.Particularly, in the figure, it may be noted that to make terminal 24 by the electric current I on the setting orientation
1Pass, and the electric current I that is oriented and passes terminal 24 when making arm 28 work
1The electric current I of orientation roughly opposite (and being substantially parallel direction in this example)
2Pass.Electric current I
1, I
2Between interaction produce the electromagnetic repulsive force F (among Figure 11, schematically showing) that can holding arms 28 removes with arrow from terminal 24, help the contact pressure increase between first pad, 23 and second pad 33 thus., yet can see the electric current I that is oriented and passes arm 28 when making 32 work of second contact carrying strutting piece still with reference to Figure 11
2The electric current I of orientation roughly opposite (and being substantially parallel direction in this example)
3Pass.This shows that these situations cause generating another electromagnetic repulsive force that is easy to make arm 28 to separate with second contact carrying strutting piece 32, thereby amplify the rejection that usually occurs in the contact area that first pad 23 and second fills up between 33.Can avoid this negative phenomena by the first ferro-magnetic shield part 50 and the second ferro-magnetic shield part 70.In fact, this shielding part 50,70 stops the electric current I by the arm 28 and second contact carrying strutting piece 32 of flowing through respectively basically
2, I
3The magnetic field and the above-mentioned Interaction Law of Electric Current that generate.By this way, eliminated other electromagnetic force that may generate basically, otherwise this can further increase the repulsion between first pad, 23 and second pad 33.
In addition, what deserves to be mentioned is that shield 60 (if the words that exist) can help to produce about keeping first pad 23 and second positive effect that contacts that fills up between 33.In fact, by shield 60 is attracted or pulls to first shielding part 50 shield 60 is cooperated with first shielding part, 50 electromagnetism.More specifically, shield can interact with the mode and first shielding part 50 that basically forms electromagnet/armature (armature) coupling, and wherein first shielding part 50 is electromagnets, and shield 60 is an armature.Therefore, make it possible to generate electromagnetic force, electromagnetic force is inhaled arm 28 to first shielding part 50 and is helped to keep the contact that first pad 23 and second fills up between 33 thus.
To sum up, arm 28 of offsetting by the electromagnetic repulsive force that can and usually generate in the contact area between first pad, 23 and second pad 33 of circuit breaker 1 and the electromagnetic repulsive force between the terminal 24 replenish by spirality and compress the effect that spring 82 applies.
Based on the content of having described, therefore can understand how can solve according to circuit breaker of the present invention above-described about shortcoming of the prior art.
Particularly, note, in circuit breaker according to the present invention, because the thrust that movable part 26 applies, therefore need not to keep suitable contact between first and second pads of circuit breaker from the additional force of actuating mechanism.
Advantageously, in circuit breaker according to the present invention, for the identical thrust that actuating mechanism applies, first pad 23 of the circuit breaker that can obviously raise with respect to the circuit breaker of prior art and the threshold value of second pad, 33 electric currents that separate.Particularly, even under the situation of electric current up to 40 kiloamperes and above suitable contact thereof that guarantees between the pad of circuit breaker, 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,, can satisfy the selectivity requirement of modern distribution facility fully by means of using size and cost with respect to the circuit breaker that for example current air circuit obviously reduces.
It shall yet further be noted that in the circuit breaker of the above type, owing to do not have the additional electrical magnetic force of determining the direct attraction between fixed bolster and the removable pad, so there is not the power of resistance by the automatic disconnection of the circuit breaker of actuating mechanism.Therefore, do not reduce circuit breaker relevant with the short interruption ability performance.In the case, note, be suitable for movable part 26 inhaled to first ferro-magnetic shield part electromagnetic force (that is, inhaling to second contact carrying strutting piece 32), generation between shield 60 and the first ferro-magnetic shield part 50 and do not revolt 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 do not reduce or negative infringement to the control of circuit breaker.
Note, the concrete structure of the first ferro-magnetic shield part (its be shaped to resemble basically the fixed part that is suitable for surrounding first contact carrying strutting piece and the shell of movable part 26) has also advantageously been simplified the assembling of the assembly that comprises first contact carrying strutting piece and first electromagnetic shield and the installation of this assembly in the corresponding mounting shell that is arranged on circuit breaker inside has been installed except allowing the best electromagnetic shielding to first contact carrying strutting piece.
In addition, this configuration that should note the first ferro-magnetic shield part produces multi-functional ferro-magnetic shield part, it also allows to keep first pad of circuit breaker and the preset distance between second pad except providing aspect the corresponding electromagnetic shielding especially effectively when second pad is set at open position.Particularly, this allows to obtain to comprise that first shielding part and first contact carry this effective especially structure of the assembly and the thus obtained circuit breaker of strutting piece.
Below, some modifications according to circuit breaker of the present invention are described, these are revised only as non-limiting example.
According to an embodiment of circuit breaker 1, it can comprise the device that is used to strengthen the conductivity between terminal 24 and the arm 28.Particularly, such device is set between terminal and the arm 28.
With reference to Fig. 2, the device that is used to strengthen conductivity can comprise the swivel pin 100 that is used for hinged terminal 24 and arm 28.Advantageously, pin 100 can be made by high conductive material, preferably but without limitation such as the copper that silvering is arranged.
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 seeing from Figure 12 a-12c, swivel pin 100 can be subdivided into a plurality of shorter swivel pin 102 that is used 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 the terminal 24.
According to an embodiment, as to the additional of the content before and subsequently having described and illustrated or substitute, the device that is used to strengthen conductivity can comprise second elastic device that is suitable for engaging arms 28, to increase the contact pressure between described arm and the terminal 24.With reference to the embodiment shown in Figure 14 a to 14e, second elastic device comprises at least one disk spring (belleville spring) 104, and disk spring 104 is set at each arm 28 and respectively is connected between wall 29A, the 29B of recess 29 with qualification.More specifically, in this embodiment, for example, provide disk spring 104, disk spring 104 is located between the connecting portion 28A of one of arm 29A, 29B of respectively connecting recess 29 and each arm 28.According to the embodiment shown in Figure 13 a to 13d, terminal 24 can comprise widens connection recess 29, makes each widen and connects the connecting portion 28A that recess 29 is admitted a pair of arm 29.In the example that illustrates, 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 the recess 29.
According to being considered to and the content that will describe additional or an embodiment substituting, the device that is used to strengthen 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, first elastic device 80 can comprise the dissimilar spring with respect to spirality compression spring 82 (Fig. 2).For example,, the use to sheet spring 110 is shown, preferably each arm 28 is used a sheet spring 110 with reference to the embodiment of Figure 15.
According to another embodiment, first elastic device 80 can comprise stiff spring, substitutes the compression 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 an 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, first contact carrying strutting piece 22 advantageously comprises the electric insulation arrangement that is arranged between arm 28 and the terminal 24.For example,, the electric insulation arrangement 120,122 that is arranged between the arm 28 and first elastic device 80 is shown with reference to the embodiment shown in Figure 13 d and the 14d, charged and thereby can damage to avoid these elastic devices owing to overheated.
According to being considered to and the content that will describe and illustrate additional or the particularly advantageous embodiment that substitutes, first contact carrying strutting piece 22 comprises and is used to make the electric current I of terminal 24 and arm 28 of flowing through respectively
1, I
2Mutual approaching device.According to an embodiment, be used to make the mutual approaching device of electric current to comprise the material thickness reduction 130 (Figure 17) of terminal 24.For example can form material thickness reduction 130 by the groove 132 on the side relative that is arranged on terminal 24 with arm 28.With reference to Figure 16 and Figure 17, two embodiment of first contact carrying strutting piece 22 are shown, have and do not have material thickness reduction 130 respectively.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 owing to material thickness reduction 130
1Electric current I near the arm 28 of flowing through
2, the feasible increase that realizes the electromagnetic repulsive force F between terminal 24 and the arm 28.
According to being considered to and the content that will describe and illustrate additional or the economic especially embodiment that substitutes, first contact carrying strutting piece 22 comprises and is used for even not needing tool using and the first ferro-magnetic shield part 50 removably is couple to the quick coupling device of first contact carrying strutting piece 22.
For example, with reference to Figure 16,17 and the embodiment of 14e, this quick coupling device comprises the quick engagement recesses 140 that is arranged on the terminal 24.
For example, with reference to Figure 14 e, when first shielding part 50 was coupled to first contact carrying strutting piece 22, the grappling contact pin 58 of first shielding part was received within the quick engagement recesses 140.More specifically, under this situation, because arm 28 is applied to pressure on first shielding part 50 by first elastic device 80, so first shielding part 50 still firmly is connected to first contact carrying strutting piece.
In the time of in such assembly is not installed to circuit breaker 1, can easily move this assembly thus, and not have the unexpected danger that breaks away from.
Be installed to circuit breaker 1 with after interior at described assembly, in suitable mount pad (not shown), when arm 28 did not contact first shielding part 50, the structure of mount pad stoped first shielding part 50 and first contact carrying strutting piece 22 to break away from.
With reference to Figure 18 and Figure 19, an embodiment of first contact carrying strutting piece 22 is shown, it is particularly suitable for low-voltage circuit breaker.In these circuit breakers, wherein the thickness of terminal 24 is less relatively, in fact can form to define wall 29A, the 29B that connects recess 29 by two parts 150 of jogged terminal end 24, 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 described the present invention with exemplary approach.Yet those skilled in the art can easily use instruction of the present invention under the situation of different types of circuit breaker (particularly, such as the double-break breaker of plastic casing).
Based on principle of the present invention, under the situation of the scope of the invention that does not deviate from claims and limited,, can change embodiment and structure detail widely for as content non-limiting example, that described and illustrated.
Claims (19)
1. a circuit-breaker (1) comprising:
-breaker body (3);
-at least one first electrical contact (20);
-be used at least one first support component (22) of described 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 the described first closed procedure position near described first electrical contact (20) so that described circuit breaker (1) is arranged to closure state, and in described opening operation position, it is set at respect to the given distance of described first electrical contact (20) described circuit breaker (1) is arranged to off-state;
-be used at least one second support component (32) of described second electrical contact (30); And
The mobile device (40) of-described second support component (32), it is used to allow described second electrical contact (30) to take described closed procedure position and described opening operation position respectively;
It is characterized in that,
Described first support component (22) comprises movable part (26), and described movable part comprises described first electrical contact (20) and is connected to described fixed part (24) movably.
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 described circuit-breaker of arbitrary aforementioned claim (1), wherein said movable part (26) operationally is arranged between described fixed part (24) and described second support component (32).
4. according to the described circuit-breaker of arbitrary aforementioned claim (1), quilt is at the electric current (I that sets on the orientation when wherein making described fixed part (24) work
1) pass, wherein, make described movable part (26) be oriented the electric current (I opposite basically with the orientation of the electric current that passes described fixed part (24)
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 first support component (22) comprise and are used to make the described electric current (I of described fixed part (24) and described movable part (26) of flowing through respectively
1, I
2) mutual approaching device (130,132).
6. according to the described circuit-breaker of arbitrary aforementioned claim (1), comprise electromagnetic screen (50,60,70), described electromagnetic screen (50,60,70) comprises at least one the first electromagnetic shielding device (50) that is arranged between described movable part (26) and described second support component (32), and the wherein said first electromagnetic shielding device (50) is shaped to resemble the shell that is fit to surround described fixed part (24) and described movable part (26) substantially.
7. circuit-breaker according to claim 6 (1), the wherein said first electromagnetic shielding device (50) comprises operationally towards at least one shielding wall (54) of described second support component (32), is attached to a pair of lateral sidewall of putting relatively of described shielding wall (54) and is attached to described a pair of lateral sidewall and by with respect to this anchor portion to the wall located lateral (58), makes described anchor portion (58) cooperate with described fixed part (24) with permission the described first electromagnetic shielding device (50) is fixed to described first support component (22).
8. according to claim 6 or 7 described circuit-breakers (1), wherein make described movable part (26) near the described first electromagnetic shielding device (50).
9. according to each described circuit-breaker (1) in the claim 6 to 8, wherein make the described first electromagnetic shielding device (50) removably be couple to described first support component (22).
10. circuit-breaker according to claim 6 (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 described additional device (60) is suitable for cooperating with described first electromagnetic shielding device (50) electromagnetism in the mode that is attracted to the described first electromagnetic shielding device (50).
11. according to the described circuit-breaker of arbitrary aforementioned claim (1), comprise first elastic device (82,110,112) that is arranged between described fixed part (24) and the described movable part (26), described first elastic device (82,110,112) is suitable for acting on the described movable part (26), increases the contact pressure between described first electrical contact (20) and described second electrical contact (30) when arriving described operation make position at described second electrical contact (30).
12. circuit-breaker according to claim 11 (1) comprises the electric insulation arrangement (120,122) that is arranged between described fixed part (24) and the described movable part (26).
13. according to the described circuit-breaker of arbitrary aforementioned claim (1), comprise the device (100,102,104) that is used to strengthen the conductivity between described fixed part (24) and the described movable part (26), the described device (100,102,104) that is used to strengthen conductivity is set between described fixed part and the described movable part (24,26).
14. circuit-breaker according to claim 13 (1), the wherein said device (100,102,104) that is used to strengthen conductivity comprise conduction swivel pin (100), are used for described fixed part (24) and described movable part (26) hinged each other.
15. circuit-breaker according to claim 12 (1), wherein said swivel pin (100) comprise a plurality of swivel pins (102) of aiming at along same hinge axes (X).
16. according to each described circuit-breaker (1) in the claim 13 to 15, the wherein said device (100,102,104) that is used to strengthen conductivity comprises second elastic device (104), and described second elastic device is suitable for engaging described movable part to increase the contact pressure between described movable part (26) and the described fixed part (24).
17. according to each described circuit-breaker (1) in the claim 13 to 16, the wherein said described device (100,102,104) that is used to strengthen conductivity comprises at least one elastic conductive component that is connected respectively to described fixed part (24) and described movable part (26).
18., comprise being used for even need not tool using and the described first electromagnetic shielding device (50) removably is couple to the quick coupling device (140) of described first support component (22) according to each described circuit-breaker (1) in the claim 6 to 17.
19. according to the described circuit-breaker of arbitrary aforementioned claim (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 used to admit 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 true CN102272873A (en) | 2011-12-07 |
| CN102272873B 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285732A (en) * | 2018-11-30 | 2019-01-29 | 武汉长海电气科技开发有限公司 | D.C. contactor and its structure of contact terminal |
Families Citing this family (1)
| 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 |
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 MX MX2011006923A patent/MX2011006923A/en active IP Right Grant
- 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 CN CN201080004648.6A patent/CN102272873B/en not_active Expired - Fee Related
-
2011
- 2011-07-12 CO CO11086671A patent/CO6341679A2/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285732A (en) * | 2018-11-30 | 2019-01-29 | 武汉长海电气科技开发有限公司 | D.C. contactor and its structure of contact terminal |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1392729B1 (en) | 2012-03-16 |
| CN102272873B (en) | 2014-03-05 |
| EP2377134A1 (en) | 2011-10-19 |
| WO2010079524A1 (en) | 2010-07-15 |
| RU2486621C2 (en) | 2013-06-27 |
| ITRM20090009A1 (en) | 2010-07-13 |
| CO6341679A2 (en) | 2011-11-21 |
| MX2011006923A (en) | 2011-07-29 |
| RU2011133817A (en) | 2013-02-20 |
| EP2377134B1 (en) | 2014-11-12 |
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