CN101958205B - Selective protection circuit breaker - Google Patents
Selective protection circuit breaker Download PDFInfo
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- CN101958205B CN101958205B CN 200910250727 CN200910250727A CN101958205B CN 101958205 B CN101958205 B CN 101958205B CN 200910250727 CN200910250727 CN 200910250727 CN 200910250727 A CN200910250727 A CN 200910250727A CN 101958205 B CN101958205 B CN 101958205B
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Abstract
The invention discloses a selective protection circuit breaker. A main circuit consists of a first wire connection device, a first bimetallic strip, a main contact, an electromagnetic system and a second wire connection device which are connected in series; a branch circuit consists of an auxiliary contact, a current-limiting resistor and a second bimetallic strip which are connected in series; and two ends of the branch circuit are connected in parallel to two sides of a main contact device. An operating mechanism is arranged on the middle upper part of a shell; an auxiliary contact device is arranged on the lower left part of the operating mechanism; the main contact device is arranged on the middle lower part of the shell; the electromagnetic system is arranged on the upper right part of the shell; the first and second bimetallic strips are arranged on the left part of the shell; and the current-limiting resistor is arranged on the upper left part of the shell. The selective protection circuit breaker also comprises a first clapboard and a second clapboard for dividing the shell into a layer A space and a layer B space in the thickness direction; first and second arc extinguish chambers are formed respectively in the layer A space; and the first and second bimetallic strips and an electromagnetic push rod of the electromagnetic system are arranged in the layer B space. The circuit breaker has the advantages of reasonable and compact structural layout, convenient assembly and debugging, high braking capacity and high reliability.
Description
Technical field
The present invention relates to the miniature circuit breaker in a kind of Terminal Power Distribution System; particularly a kind of have the overload long delay, short circuit short time-delay and short circuit instantaneous trip protective value selective protective breaker; public, the commercial building that is applicable in actual electric network, move or circuit, illumination and electric equipment five equilibrium, combined floodgate, overload, the short-circuit protection of residential houses; its selective protection function not only will solve the problem of overstep tripping; but also can solve in the situation that subordinate's circuit breaker can not in time trip first the problem that higher level's circuit breaker also can in time trip.
Background technology
At present; along with electric equipment kind, the increase of quantity and the raising of automaticity in industry, commerce and the Household building; demand to miniature circuit breaker increases sharply, and is also more and more higher to the requirement of the cooperation of the overcurrent protective device of a plurality of the superior and the subordinate miniature circuit breaker simultaneously.The miniature circuit breaker of prior art generally all has the overload long delay and short circuit wink is moved two segment protect functions; although it has solved the problem of overload protection and short-circuit protection well; but when certain electric equipment breaks down; often can not guarantee within the shortest time, to move apart from the nearest circuit breaker of this equipment; the circuit breaker action disengagement failure power supply but the higher level connects; the problem of touching of this circuit breaker overstep tripping; have a strong impact on stability and the reliability of distribution system, bring more worry for the electricity consumption user.The particularly arrival of information age, along with popularizing of the messaging devices such as computer, the problem of overstep tripping often can bring disaster to the electric equipment that uses at regular link, causes loss of data or damage equipment.For solving the problem of overstep tripping; new-type selective protective breaker not only has overload long delay protection function at present; but also has the short circuit short time-delay protective feature; protective feature by short circuit short time-delay; with when short trouble occurs; can make from the nearest subordinate's circuit breaker of short circuit line and trip first, thereby avoid the generation of higher level's circuit breaker overstep tripping.
Chinese utility model patent 200520045094.0 discloses a kind of selective protection switch; this patented technology is by two pairs of contacts (main contact, auxiliary contact), the first overcurrent trip, the second overcurrent trip, current-limiting resistance, electromagnetic mechanism built-up circuit; in described circuit, comprise main circuit and a circuit; a part of in parallel in circuit and the main circuit props up a circuit and is composed in series by auxiliary contact, current-limiting resistance and the second overcurrent trip.By the closure/disjunction of two pairs of contacts of operating mechanism control, by electromagnetic mechanism control main contact closure/disjunction wherein, the first overcurrent trip and the second overcurrent trip be the control operation mechanical unlocking respectively.Wherein the first overcurrent trip has overload long delay characteristic, and the second overcurrent trip has the short circuit short time-delay characteristic.When circuit is short-circuited fault and makes selective protection switch enter the short circuit short time-delay operating state; the electric current of selective protection switch turns from above-mentioned circuit flow mistake; because the effect of restricted flow resistance; so output current is changed into the electric current that can limit, to guarantee the safety of circuit under the short circuit short time-delay state.
Yet; the selective protection switch piece volumes of this patent is large; the electrical connection node is many; bonding conductor path length between the node; because topology layout is not compact; causing being electrically connected operation or wire lays difficult; manufacturing cost is high; and the main contact of this switch and the form of auxiliary contact are single-break; its global design does not allow to adopt rotary series connection double breaking points main contact; and the breaking capacity of single-break contact is less, and this does not meet the more and more higher performance index of its breaking capacity and development trend for miniature circuit breaker.As everyone knows, two moving contacts are compared with single-break contact for the double break contact of series connection, have that breaking capacity is strong, the electric arc of contact generation when disjunction/closure is little, moving contact need not to connect the advantages such as wire.
And; it is many that this band props up the electric component that the inside of the miniature circuit breaker of circuit comprises; the node of the electrical connection of its inside is also many; but for satisfying the more and more microminiaturized future development trend of miniature circuit breaker volume and size; the circuit breaker inner space is more and more less; proposed a series of requirements for the design of selective protective breaker for this reason: the firstth, the nodes that is electrically connected is the least possible; the secondth, in the assembling and setting of product, be convenient to realize be electrically connected reliably operation; the 3rd is that the wire that participates in being electrically connected will lack and be convenient to lay; the 4th is the insulation request that must satisfy safety between the live part of mutually insulated; the 5th is that the internal structure layout of product is will be as far as possible compact, and the 6th is the stability that will guarantee performance during the product work.This global design to selective protective breaker has proposed harsher requirement; particularly its inner topology layout design is extremely important; it not only will satisfy the basic demand of electric property and the theory of mechanics of product, is easy to many-sided requirements such as process and assemble, properties of product are stable and reduce production costs but also will satisfy.In addition, the every bit adjustment in topology layout all can cause the variation of global design effect.
So global design has become one of link the most difficult in the design of miniature circuit breaker product high-performance micro, people need to develop a kind of miniature circuit breaker that overcomes defects.
Summary of the invention
The selective protective breaker that the object of the present invention is to provide a kind of low-voltage distribution terminal to use; the circuit structure and the rotary series connection double-break contact device that add branch's circuit with main circuit; has reasonable, compact internal structure layout; can realize the selectivity action message of multiple overcurrent protective device cooperation, have be electrically connected that nodes is few, the electrical connecting wire path short, be easy to assemble, breaking capacity is strong, the advantages such as fail safe height of functional reliability and use.
To achieve these goals, the present invention has adopted following technical scheme.
A kind of selective protective breaker; it comprises shell 8, operating mechanism 1, arc control device, main circuit and a circuit; described main circuit is composed in series by the first termination 81, the first bimetal leaf 5, main contact device 3, electromagnetic system 2 and the second termination 82; described circuit is composed in series by auxiliary contact 4, current-limiting resistance 7 and the second bimetal leaf 6, and the two ends of described circuit are connected in the both sides of main contact device 3 in parallel.Described electromagnetic system 2 is provided with electromagnetism push rod 27, and described electromagnetism push rod and main contact mechanism are of coupled connections.Circuit breaker of the present invention also comprises the first dividing plate 89 and second partition 90, two dividing plates separate two spaces at the circuit breaker thickness direction, be used for 8 two residing region separation of dividing plate of shell are become A, B two sheaf spaces, described arc control device form respectively the first arc control device 91 and the second arc control device 92 in the A sheaf space, described the first sheet metal 5, the second bimetal leaf 6 and electromagnetism push rod 27 are separately positioned in the space of B sheaf space and the extension of B layer; Described operating mechanism 1 is arranged on the middle and upper part of shell 8; Described auxiliary contact 4 is arranged on the lower left quarter of operating mechanism 1; Described main contact device 3 is arranged on the middle and lower part of shell 8 and is in the below of operating mechanism 1; Described electromagnetic system 2 is arranged on the upper right quarter of shell 8 and is in the right-hand of operating mechanism 1; Described the first bimetal leaf 5 and the second bimetal leaf 6 are arranged on the left part of shell 8 in the mode that is parallel to each other, and are in the left of operating mechanism 1 and main contact device 3; Described current-limiting resistance 7 is arranged on the upper left quarter of shell 8 and is in the left of operating mechanism 1.
According to still another embodiment of the invention, adopt soft the connection between the first termination 81 and the first bimetal leaf 5; Adopt soft the connection between the second main fixed contact 35 of the first bimetal leaf 5 and main contact device 3; Adopt soft the connection between the second main fixed contact 35 of main contact device 3 and the second bimetal leaf 6; Adopt soft the connection between the second bimetal leaf 6 and the current-limiting resistance 7; Adopt between the auxiliary fixed contact 42 of current-limiting resistance 7 and auxiliary contact 4 and be rigidly connected; Adopt soft the connection between the first main fixed contact 34 of the auxiliary moving contact 41 of auxiliary contact 4 and main contact device 3; Main contact device 3 first main quiet 34 with electromagnetic system 2 between soft connection of employing; Adopt between electromagnetic system 2 and the second termination 82 and be rigidly connected.
According to another embodiment of the present invention, described main contact device 3 comprise initiatively that contact 31, main contact support 32, rotating shaft 33, the first main fixed contact 34, the second main fixed contact 35, main contact spring 36, motion arm 321 and electronic arm 322; The described first main fixed contact 34, the second main fixed contact 35 are separately positioned in the first interior arc control device 91 of A sheaf space, the second arc control device 92; Described active contact 31 is provided with the moving contact of two series connection, and two moving contacts stretch into respectively in the first interior arc control device 91 of A sheaf space, the second arc control device 92, realize and the first main fixed contact 34, second main fixed contact 35 closures/disjunction; Motion arm 321 is formed on main contact and supports on 32, and motion arm 321 is positioned at the space that B sheaf space above the second partition 90 and/or B layer extend; An electronic arm 322 is formed on main contact and supports that on 32, described electronic arm 322 is positioned at the B sheaf space above the second partition 90.
According to still another embodiment of the invention; angle between the direction of motion E of moving unshakable in one's determination 22 and electromagnetism push rod 27 of described electromagnetic system 2 and the installed surface F of selective protective breaker makes the direction of motion E of electromagnetism push rod 27 as far as possible mutually vertical with the installed surface F of circuit breaker between 60 ° to 90 ° (comprising end points).Preferred version is that the angle between the direction of motion E of moving unshakable in one's determination 22 and electromagnetism push rod 27 of described electromagnetic system 2 and the installed surface F of selective protective breaker is 90 °, makes the direction of motion E of electromagnetism push rod 27 mutually vertical with the installed surface F of circuit breaker.
According to still another embodiment of the invention, the stiff end of described the first bimetal leaf 5 and the second bimetal leaf 6 all is fixed on the first dividing plate 89, and is in the B sheaf space above the first dividing plate 89; The free end of the second bimetal leaf 5 and the second bimetal leaf 6 all is in the space that described this B sheaf space extends.Described current-limiting resistance 7 is in the space that described A sheaf space extends.
According to still another embodiment of the invention, the push rod 20 of described operating mechanism 1 is of coupled connections with motion arm 321 on the main contact device 3, and the position that is of coupled connections of described push rod 20 and motion arm 321 is in B sheaf space above the second partition 90 or the space of its extension.Perhaps, the electromagnetism push rod 27 of electromagnetic system 2 is of coupled connections with the electronic arm 322 on the main contact device 3, and the position that is of coupled connections of electromagnetic system push rod 27 and electronic arm 322 is in the B sheaf space above the second partition 90.
Description of drawings
The present invention above-mentioned and other technical characterictic, effect and advantage further describe in conjunction with following each accompanying drawing in the embodiment in the back, Reference numeral identical in each accompanying drawing represents identical element or feature all the time.
Fig. 1 is the schematic diagram of the specific embodiment of selective protective breaker of the present invention.
Fig. 2 is the structural representation of an embodiment of selective protective breaker of the present invention.
Fig. 3 is the structural representation of another embodiment of selective protective breaker of the present invention, has removed the first dividing plate and second partition among the figure.
Fig. 4 is the electrical connection schematic diagram of selective protective breaker of the present invention.
Embodiment
Below in conjunction with the embodiment shown in the accompanying drawing 1-4, further describe technical scheme and the embodiment of selective protective breaker of the present invention.
Selective protective breaker of the present invention can use various ways to realize, is not limited to the description of accompanying drawing and following specific embodiment.
As shown in Figures 1 to 3, comprise operating mechanism 1, electromagnetic system 2, main contact device 3, auxiliary contact 4, the first bimetal leaf 5, the second bimetal leaf 6, current-limiting resistance 7, the first termination 81, the second termination 82 in the shell 8 of selective protective breaker of the present invention.Main circuit is composed in series by the first termination 81, the first bimetal leaf 5, main contact device 3, electromagnetic system 2, the second termination 82, and a circuit is comprised of auxiliary contact 4, current-limiting resistance 7, the second bimetal leaf 6.The two ends of described circuit are attempted by the both sides of the main contact device 3 of main circuit.Described operating mechanism is comprised of handle 11, fixed head 12, release lever 13, snap close 14, tripping 15, first connecting rod 16, second connecting rod 17, third connecting rod 18, spring 19, push rod 20.Described electromagnetic system 2 is comprised of coil 21, moving iron core 22, fixed core 23, permanent magnet 24, coil rack 25, case 26, electromagnetism push rod 27, magnetic conductive board 28.Electromagnetic system 2 is installed in the upper right side of main contact 3, so that the electromagnetism push rod 27 of electromagnetic system can support 32 at the contact that promotes under the effect of electromagnetic force on the main contact 3, main contact 3 is opened.
As shown in Figure 3, main contact device 3 is comprised of active contact 31, main contact support 32, rotating shaft 33, the first main fixed contact 34, the second main fixed contact 35, main contact spring 36.Main contact support 32 is installed on the rotating shaft 33 pivotally, and initiatively contact 31 is fixed on main contact and supports on 32, is formed on that two moving contacts on the contact 31 are initiatively connected mutually and becomes the point symmetry setting with the axle center of rotating shaft 33.Described auxiliary contact 4 is comprised of auxiliary moving contact 41 and auxiliary fixed contact 42.Support 32 when rotating shaft 33 rotates when main contact, drive on the contact 31 initiatively two moving contacts respectively with the first main fixed contact 34, second main fixed contact 35 simultaneously closure/disjunctions.The two ends of touch spring 36 support 32 installations to be connected with shell 8, main contact respectively, the elastic force of touch spring 36 is ordered about main contact and is supported 32 to produce moment of torsion, and this moment of torsion orders about two moving contacts of active contact 31 all the time respectively to the first main fixed contact 34, the second main fixed contact 35 closures.Described main contact device 3 is a kind of series connection double break contacts, its operation principle is: main contact device 3 is without under the External Force Acting, the elastic force of the main contact spring 36 in it orders about initiatively contact 31 and the first main fixed contact 34, the second main fixed contact 35 closures automatically, and initiatively the disjunction of contact 31 action must be driven by external force, and this external force is from operating mechanism 1 and/or electromagnetic system 2.This shows that operating mechanism 1, electromagnetic system 2 not only will satisfy the requirement of mutual mechanical linkage with main contact device 3 threes' topology layout, but also will satisfy the requirement of topology layout compactness, particularly will guarantee the Performance and quality requirement of product.
Mechanical connection and the linkage structure of circuit breaker moving system of the present invention are described below in conjunction with Fig. 3.A motion arm 321 is formed on main contact and supports on 32, and motion arm 321 is used for being of coupled connections with the push rod 20 of operating mechanism 1.When operating mechanism 1 is in "on" position, do not contact between push rod 20 and the motion arm 321, it is the interactively that does not have power between them, main contact device 3 is without External Force Acting, at this moment, initiatively contact 31 rely on main contact springs 36 elastic force and automatically with the first main fixed contact 34, the second main fixed contact 35 closures.When operating mechanism 1 was transferred to gate-dividing state/tripped condition by "on" position, push rod 20 promoted motion arms 321, order about main contact and support 32 to rotate, thereby drive initiatively contact 31 respectively with the first main fixed contact 34, the second main fixed contact 35 simultaneously disjunctions.An electronic arm 322 is formed on main contact and supports on 32, and electronic arm 322 is used for being of coupled connections with the electromagnetism push rod 27 of electromagnetic system 2.When circuit breaker is in normal "on" position, electromagnetism push rod 27 does not contact with electronic arm 322, main contact device 3 is without External Force Acting, at this moment, initiatively contact 31 rely on main contact springs 36 elastic force and automatically with the first main fixed contact 34, the second main fixed contact 35 closures.When short trouble occurs, short circuit current in the main circuit flows through the coil 21 of electromagnetic system 2 and produces magnetic field, this field drives moving unshakable in one's determination 22 and electromagnetism push rod 27, promote main contact and support the electronic arm 322 on 32 to swing, the swing of electronic arm 322 drive initiatively contact 31 respectively with the first main fixed contact 34, the second main fixed contact 35 simultaneously disjunctions.After short trouble is eliminated, that is when not having short circuit current in the coil 22, under the magneticaction of permanent magnet 24, moving unshakable in one's determination 22 and electromagnetism push rod 27 return to initial position.At this moment, the electromagnetism push rod 27 under this location status does not contact with electronic arm 322 in the main contact support 32.
The auxiliary moving contact 41 of auxiliary contact 4 is installed on the STATEMENT OF FEDERALLY SPONSORED (not shown) of operating mechanism 1, and links with handle 11, first connecting rod 16, second connecting rod 17, third connecting rod 18, the push rod 20 of operating mechanism 1.When the handle 11 of operating mechanism 1 is pulled closing position, under the promotion of the operating physical force of handle 11, the first connecting rod 16, second connecting rod 17, third connecting rod 18, push rod 20, the auxiliary moving contact 41 that link with handle 11 move thereupon, and make spring 19 energy storage, push rod 20 supports the motion arm 321 on 32 to break away from main contact, makes auxiliary moving contact 41 and auxiliary fixed contact 42 closures.When this closing position, tripping 15 and the snap close 14 of operating mechanism are in interlocking state.When operating grip 11 is pulled open position from closing position artificially, when perhaps making tripping 15 with snap close 14 release by the first bimetal leaf 5 and/or the second bimetal leaf 6 shake-up release levers 13, under the elastic force effect that spring 19 discharges, make the handle 11 of operating mechanism 1, first connecting rod 16, second connecting rod 17, third connecting rod 18, push rod 20, auxiliary moving contact 41 interlocks, this interlock not only is with dynamic auxiliary moving contact 41 and auxiliary fixed contact 42 disjunctions, support 32 motion arm 321 to swing but also promote main contacts by push rod 20, thus make initiatively contact 31 respectively with the first main fixed contact 34, the second main fixed contact 35 disjunctions.This shows that actuating handle 11 can drive main contact 3 by push rod 20 and connecting rod respectively and auxiliary contact 4 carries out the conversion of closed and disconnected position.The first bimetal leaf 5 contacts with the different parts of release lever 13 respectively with the second bimetal leaf 6, can be by promoting 14 releases of release lever 13 slip rear drive snap closes, the dropout operation of complete operation structure 1.
The first termination 81 comprises first terminal block 93, is used for being electrically connected of the first termination 81 and external wire (such as input lead).The second termination 8 comprises one by one the second terminal block 84, is used for being electrically connected of the second termination 82 and external wire (as outputing to wire).
Further describe the operation principle of selective protective breaker of the present invention and the control relation of each parts below in conjunction with foregoing description and accompanying drawing 1.Disjunction/the closure of main contact device 3 is subjected to the control of operating mechanism 1 and/or electromagnetic system 2, and the normal closing operation of operating mechanism 1 can be controlled the closure of main contact device 3, and the normal sub-switching operation of operating mechanism 1 or tripping operation action can be controlled the disjunction of main contact device 3.When short circuit current occurred, electromagnetic system 2 is the disjunction of control main contact device 3 automatically, and in other cases, 2 pairs of main contact devices of electromagnetic system 3 are without the control restriction.The disjunction of auxiliary contact 4/closure only is subjected to the control of operating mechanism 1, and the normal closing operation of operating mechanism 1 can be controlled the closure of auxiliary contact 4, and the normal sub-switching operation of operating mechanism 1 or tripping operation action can be controlled the disjunction of auxiliary contact 4.The first bimetal leaf 5 has the long delay characteristic, when overload current occurs and reaches certain thresholding, and 1 tripping operation of the first bimetal leaf 5 control operation mechanisms.The second bimetal leaf 6 has the short time delay characteristic, when short circuit current occurs and reaches certain thresholding, and 1 tripping operation of the second bimetal leaf 6 control operation mechanisms.
Selective protective breaker of the present invention is under normal operating state of closing a floodgate, and operating current flows through from main circuit, namely from 81 inputs of the first termination and through the first bimetal leaf 5, main contact device 3, electromagnetic system 2 and 82 outputs of the second termination.Owing in a circuit, sealed in current-limiting resistance 7, in the normal lower circuit of "on" position, flow through without operating current.When overload current occurring, the free end of the first bimetal leaf 5 begins action, reach certain thresholding if overload current is held time, then the free-ended action of the first bimetal leaf 5 touches release lever 13 (shown in Figure 3) action on the operating mechanism 1, and causes operating mechanism 1 tripping operation.When short circuit current occurred, electromagnetic system 2 ordered about moving iron core 22 and electromagnetism push rod 27 (shown in Figure 3) and promotes the rotation of main contact support 32 (shown in Figure 3), thereby make main contact device 3 disjunctions under the effect of short circuit current.Main contact device was had no progeny in 3 minutes, and short circuit current turns from a circuit flow mistake, its size of current restricted flow resistance 7 impacts, and meanwhile the free end of the second bimetal leaf 6 begins action.Hold time when reaching certain thresholding such as the electric current in the circuit, then the free-ended action of the second bimetal leaf 6 touches release lever 13 (shown in Figure 3) action on the operating mechanism 1, and cause operating mechanism 1 to trip, if reaching thresholding, the holding time of short circuit current do not disappear, then electromagnetic system 2 reduces because of the electric current in its coil 21, and make electromagnetism push rod 27 lose the motive force that promotes electronic arm 322, thereby can automatically remove the control to main contact device 3, and make main contact device 3 auto-closings, and main contact device 3 is in case closed, the electric current that props up in the circuit disappears automatically, thereby makes circuit breaker recover again normal operation.
Be understood that from the description of modular construction, position and the operation principle thereof of upper relevant selective protective breaker of the present invention; this miniature circuit breaker should satisfy the mutual control and the requirement that concerns that mutually links between each parts; satisfy again the performance requirement of the products such as compact conformation, the electrical connection node is few, electrical connecting wire short, arc extinction performance is good; also will satisfy the requirement that is easy to assemble adjusting, this certainly will strengthen difficulty to global design and the topology layout design of product.The structural entity layout design scheme that the present invention forms on well-designed basis is the newly designed achievement of selective protective breaker of new generation.The below further specifies characteristics and the advantage of global design of the present invention from four aspects.
First characteristics of selective protective breaker global design of the present invention are to have adopted the first dividing plate 89 and second partition 90, and the residing zone of shell 8 internal partitions (being on the thickness direction of circuit breaker) on perpendicular to the direction of the paper of Fig. 2 or Fig. 3 is divided into A, B two sheaf spaces.So-called A sheaf space refers to the lower layer space perpendicular to Fig. 2 or Fig. 3 paper, and so-called B sheaf space refers to the upper sheaf space perpendicular to Fig. 2 or Fig. 3 paper, is separated by the first dividing plate 89 or second partition 90 between A sheaf space and the B sheaf space.In other words, the first dividing plate 89 and second partition 90 following spaces are the A sheaf space, and the first dividing plate 89 and the space above the second partition are the B sheaf space.At the position without the first dividing plate 89 or second partition 90 separations, the present invention is called wider space, specifically, the definition space that will be extended along its plane by the A sheaf space is the space that the A layer extends, and the definition space that will be extended along its plane by the B sheaf space is the space that the B layer extends.From Fig. 2 and as seen shown in Figure 3, the A sheaf space that is separated into by the first dividing plate 89 and second partition 90, being used to form the first arc control device 91 and the second arc control device 92, the first arc control device 91, the second arc control device 92 is surrounded and is formed by the partition wall in the shell 8 and the first dividing plate 89, second partition 90 respectively.Obviously, such structure can not only make the first arc control device 91, the second arc control device 92 be formed with the full-closed structure that is beneficial to arc extinguishing, and can also be easily with initiatively contact 31 and the first main fixed contact 34, the second main fixed contact 35 are installed in respectively in the first arc control device 91, the second arc control device 92, initiatively contact 31 is disconnected with closed part of the first main fixed contact 34, the second main fixed contact 35 collaborative works and realization in the first arc control device 91, the second arc control device 92 respectively, thereby has improved the arc extinction performance of circuit breaker.The electronic arm 322 with electromagnetic system 2 coupling in the main contact support 32 is arranged on B sheaf space above the second partition 90, electromagnetism push rod 27 also is in the space of this B sheaf space and the extension of this B sheaf space, make electronic arm 322 in electromagnetism push rod 27 couplings of this B sheaf space and electromagnetic system 2, obviously, such project organization has been saved a lot of spaces.The first bimetal leaf 5 and the second bimetal leaf 6 are arranged in the space that B sheaf space above the first dividing plate 89 and this B sheaf space extend in parallel to each other, the stiff end of the stiff end of the first bimetal leaf 5 and the second bimetal leaf 6 all is fixed on the first dividing plate 89, such project organization has not only been saved a lot of spaces, makes simultaneously the Installation and Debugging of the first bimetal leaf 5 and the second bimetal leaf 6 very convenient.Current-limiting resistance 7 is arranged in the space that the A sheaf space below the free end of the first bimetal leaf 5 and the second bimetal leaf 6 extends, obviously, such structure has not only been saved the space, can before the first bimetal leaf 5 and the second bimetallic 6 are installed, current-limiting resistance 7 be installed first simultaneously, make the Installation and Debugging of current-limiting resistance 7 very convenient.
Selective protective breaker of the present invention is owing to adopted the first dividing plate 89 and second partition 90; circuit breaker is divided into the space of A sheaf space, B sheaf space, the extension of A layer and the space that the B layer extends at Width; arc control device, main contact 3 are installed between shell and the dividing plate side by side; the first bimetal leaf 5 and the second bimetal leaf 6 approximately parallel dividing plate tops that are installed in; and the straight line near normal that its installation direction and arc control device and main contact 3 form; so saved a lot of spaces of interiors of products; dwindled the volume of product, made simultaneously the assembly and adjustment of product very convenient.
The following describes second characteristic of selective protective breaker of the present invention.Shown in Fig. 2,3, the operating mechanism 1 of selective protective breaker of the present invention is arranged on the middle and upper part of shell 8, so that operating grip 11 is in the outside of the middle and upper part of product, convenient operation.With respect to operating mechanism 1, auxiliary contact device 4 is arranged on the lower left quarter of operating mechanism 1, and it nestles up current-limiting resistance 7 and the first bimetal leaf 5, the second bimetal leaf 6, so that it is the shortest to connect wire.Main contact device 3 is arranged on the middle and lower part of shell 8, the below of operating mechanism 1 namely, such layout can make the push rod 20 of operating mechanism 1 and main contact support that the coupling distance between the motion arm 321 on 32 is the shortest, also can make the electromagnetism push rod 27 of electromagnetic system 2 support that with main contact the coupling distance of the electronic arm 322 on 32 is the shortest, also can make angle between the installed surface F of the direction of motion E of electromagnetism push rod 27 and circuit breaker near 90 °, in addition, also can make two moving contacts on the contact 31 initiatively stretch into the first arc control device 91 and second arc control device 92 of shell 8 belows with the shortest distance.Electromagnetic system 2 is arranged on the upper right quarter of shell 8, and namely manipulator 1 is right-hand, and such layout can make angle between the installed surface F of the direction of motion E of electromagnetism push rod 27 and circuit breaker near 90 °, can also make that to connect wire the shortest simultaneously.The first bimetal leaf 5 and the second bimetal leaf 6 are arranged on the left part of shell 8 in the mode that is parallel to each other, the left of operating mechanism 1 namely, it also is the left of main contact device 3, such layout can make the coupling distance of release lever 13 of the free end of the first bimetal leaf 5, the second bimetal leaf 6 and operating mechanism 1 the shortest, can make also simultaneously that to connect wire the shortest.Current-limiting resistance 7 is arranged on the upper left quarter of shell 8, the left of operating mechanism 1 namely, and it so that it is the shortest to connect wire, also is convenient to heat radiation near auxiliary contact 4 and the first bimetal leaf 5, the second bimetal leaf 6.Therefore, compact conformation and rationally distributed be another large advantage of the present invention.
The 3rd characteristics of selective protective breaker of the present invention are that the electrical connection between each parts is easy to operate.As everyone knows; owing to need to be electrically connected by electric conductor between each parts of selective protective breaker; and these electrical connections must be finished in the assembly and adjustment process of product; not only be related to production efficiency and the time cost of product so be electrically connected the convenience of operation, but also be related to electrical connection quality and job stability thereof.The product of prior art has been owing to ignored this key element when overall construction design, thereby causes product to reduce security reliability because of the electrical connection quality problem.
As shown in Figure 4, the present invention for guaranteeing that the assembling product debugging is convenient, it is swift to operate reliable to be electrically connected, has adopted soft connection and the electric connection structure layout that is rigidly connected and combines from integral structure layout's design.So-called soft connection refers to adopt between the parts soft wire to connect; What is called is rigidly connected, and refers to adopt between the parts conductor of rigidity to connect.Concrete connected mode as shown in Figure 4, adopt soft the connection between the first terminal block 83 of the first termination 81 and the first bimetal leaf 5, adopt soft the connection between the second main fixed contact 35 of the first bimetal leaf 5 and main contact device 3, adopt soft the connection soft connection of employing between the second bimetal leaf 6 and the current-limiting resistance 7 between the second main fixed contact 35 of main contact device 3 and the second bimetal leaf 6.Adopt between the auxiliary fixed contact 42 of current-limiting resistance 7 and auxiliary contact 4 and be rigidly connected, adopt soft the connection between the first main fixed contact 34 of the auxiliary moving contact 41 of auxiliary contact 4 and main contact device 3, adopt soft the connection between the first main fixed contact 34 of main contact device 3 and the electromagnetic system 2, adopt between the second terminal block 84 of electromagnetic system 2 and the second termination 82 to be rigidly connected.
Angle between the direction of motion that the 4th characteristics of selective protective breaker of the present invention are electromagnetism push rods 27 and the installation direction of circuit breaker is near 90 °.The inventor notices, because moving iron core and the electromagnetism push rod 27 of electromagnetic system 2 have certain weight, therefore when the direction of motion of electromagnetism push rod 27 was parallel with horizontal plane, described weight was minimum for thrust error and the movement velocity impact of electromagnetism push rod 27.When the direction of motion of electromagnetism push rod 27 was vertical with horizontal plane, described weight had the greatest impact for thrust error and the movement velocity of electromagnetism push rod 27.Utilize this principle, when integral layout designs, the direction of motion E (shown in Figure 2) that makes as far as possible electromagnetism push rod 27 is mutually vertical with the installed surface F (shown in Figure 2) of circuit breaker to be very important, and this is that its installed surface F is often perpendicular to horizontal plane because circuit breaker is when reality is used.According to the selective protective breaker of topology layout design of the present invention, the angle between the installed surface F of the direction of motion E of electromagnetism push rod 27 and circuit breaker can be selected between 60 ° to 90 °, and its preferred angle can be 90 °.
Claims (9)
1. selective protective breaker; it comprises shell (8); operating mechanism (1); arc control device; main circuit and a circuit; described main circuit is by the first termination (81); the first bimetal leaf (5); main contact device (3); electromagnetic system (2) and the second termination (82) are composed in series; described circuit is by auxiliary contact (4); current-limiting resistance (7) and the second bimetal leaf (6) are composed in series; the two ends of described circuit are connected in the both sides of main contact device (3) in parallel; described electromagnetic system (2) is provided with electromagnetism push rod (27), it is characterized in that:
Also comprise the first dividing plate (89) and second partition (90), be used for shell (8) is separated into A sheaf space, B sheaf space two sheaf spaces, described arc control device form respectively the first arc control device (91) and the second arc control device (92) in the A sheaf space, described the first sheet metal (5), the second bimetal leaf (6) and electromagnetism push rod (27) are separately positioned in the space of B sheaf space and the extension of B layer;
Described operating mechanism (1) is arranged on the middle and upper part of shell (8);
Described auxiliary contact (4) is arranged on the lower left quarter of operating mechanism (1);
Described main contact device (3) is arranged on the middle and lower part of shell (8) and is in the below of operating mechanism (1);
Described electromagnetic system (2) is arranged on the upper right quarter of shell (8) and is in the right-hand of operating mechanism (1);
Described the first bimetal leaf (5) and the second bimetal leaf (6) are arranged on the left part of shell (8) in the mode that is parallel to each other, and are in the left of operating mechanism (1) and main contact device (3);
Described current-limiting resistance (7) is arranged on the upper left quarter of shell (8) and is in the left of operating mechanism (1).
2. selective protective breaker according to claim 1 is characterized in that:
Adopt soft the connection between the first termination (81) and the first bimetal leaf (5);
Adopt soft the connection between the second main fixed contact (35) of the first bimetal leaf (5) and main contact device (3);
Adopt soft the connection between the second main fixed contact (35) of main contact device (3) and the second bimetal leaf (6);
Adopt soft the connection between the second bimetal leaf (6) and the current-limiting resistance (7);
Adopt between the auxiliary fixed contact (42) of current-limiting resistance (7) and auxiliary contact (4) and be rigidly connected;
Adopt soft the connection between the first main fixed contact (34) of the auxiliary moving contact (41) of auxiliary contact (4) and main contact device (3);
Adopt soft the connection between the first main fixed contact (34) of main contact device (3) and the electromagnetic system (2);
Adopt between electromagnetic system (2) and the second termination (82) and be rigidly connected.
3. selective protective breaker according to claim 1 and 2 is characterized in that:
Described main contact device (3) comprises initiatively contact (31), main contact support (32), rotating shaft (33), the first main fixed contact (34), the second main fixed contact (35), main contact spring (36), motion arm (321), electronic arm (322);
The described first main fixed contact (34), the second main fixed contact (35) are separately positioned in interior the first arc control device (91) of A sheaf space, the second arc control device (92);
Described active contact (31) is provided with the moving contact of two series connection, two moving contacts stretch into respectively in interior the first arc control device (91) of A sheaf space, the second arc control device (92), realize and the first main fixed contact (34), second main fixed contact (35) closure/disjunction;
A motion arm (321) is formed in the main contact support (32), and motion arm (321) is positioned at the space of the top B sheaf space of second partition (90) and/or the extension of B layer;
An electronic arm (322) is formed in the main contact support (32), and described electronic arm (322) is positioned at the B sheaf space above the second partition (90).
4. selective protective breaker according to claim 1 and 2; it is characterized in that: the angle between the direction of motion E of the electromagnetism push rod (27) of described electromagnetic system (2) and the installed surface F of selective protective breaker is more than 60 °, below 90 °.
5. selective protective breaker according to claim 1 and 2, it is characterized in that: the stiff end of described the first bimetal leaf (5) and the second bimetal leaf (6) all is fixed on the first dividing plate (89), and is in the B sheaf space above the first dividing plate (89);
The free end of the first bimetal leaf (5) and the second bimetal leaf (6) all is in the space that described this B sheaf space extends.
6. selective protective breaker according to claim 1 and 2 is characterized in that: described current-limiting resistance (7) is in the space that described A sheaf space extends.
7. selective protective breaker according to claim 3 is characterized in that:
Described operating mechanism (1) comprises a push rod (20), operating mechanism (1) is of coupled connections by the motion arm (321) on this push rod (20) and the main contact device (3), and the position that is of coupled connections of described push rod (20) and motion arm (321) is in B sheaf space and wider space thereof above the second partition (90).
8. the arbitrary selective protective breaker according to claim 1-2 is characterized in that:
Electronic arm (322) on the electromagnetism push rod (27) of electromagnetic system (2) and the main contact device (3) is of coupled connections, and the position that is of coupled connections of electromagnetic system push rod (27) and electronic arm (322) is in the B sheaf space above the second partition (90).
9. selective protective breaker according to claim 4 is characterized in that:
Angle between the installed surface F of the moving iron core (22) of described electromagnetic system (2) and the direction of motion E of electromagnetism push rod (27) and selective protective breaker is 90 °, makes the direction of motion E of electromagnetism push rod (27) mutually vertical with the installed surface F of circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250727 CN101958205B (en) | 2009-12-09 | 2009-12-09 | Selective protection circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250727 CN101958205B (en) | 2009-12-09 | 2009-12-09 | Selective protection circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101958205A CN101958205A (en) | 2011-01-26 |
| CN101958205B true CN101958205B (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910250727 Active CN101958205B (en) | 2009-12-09 | 2009-12-09 | Selective protection circuit breaker |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903924B (en) * | 2012-12-25 | 2016-05-11 | 施耐德电器工业公司 | Miniature circuit breaker |
| CN114078638B (en) * | 2020-08-17 | 2024-02-06 | 天津首瑞智能电气有限公司 | Switching device |
| CN112731201B (en) * | 2021-03-22 | 2022-08-12 | 上海宏力达信息技术股份有限公司 | Single-phase earth fault studying and judging method and system in transient zero sequence power direction |
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| DE2854711A1 (en) * | 1978-12-18 | 1980-07-03 | Bbc Brown Boveri & Cie | Selective safety cut=out system for complex supply networks - has main fuse preceding parallel lines with bimetallic elements with current diversion |
| CN201242984Y (en) * | 2008-07-15 | 2009-05-20 | 浙江正泰电器股份有限公司 | Selective protection circuit breaker |
| CN101488424A (en) * | 2008-01-14 | 2009-07-22 | 上海电器科学研究所（集团）有限公司 | Selective protection switch |
| CN201311892Y (en) * | 2007-04-28 | 2009-09-16 | Abb股份有限公司 | Electric installation power distribution unit |
| CN201655718U (en) * | 2009-12-09 | 2010-11-24 | 上海诺雅克电气有限公司 | Selective-protection circuit breaker |
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2009
- 2009-12-09 CN CN 200910250727 patent/CN101958205B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2854711A1 (en) * | 1978-12-18 | 1980-07-03 | Bbc Brown Boveri & Cie | Selective safety cut=out system for complex supply networks - has main fuse preceding parallel lines with bimetallic elements with current diversion |
| CN201311892Y (en) * | 2007-04-28 | 2009-09-16 | Abb股份有限公司 | Electric installation power distribution unit |
| CN101488424A (en) * | 2008-01-14 | 2009-07-22 | 上海电器科学研究所（集团）有限公司 | Selective protection switch |
| CN201242984Y (en) * | 2008-07-15 | 2009-05-20 | 浙江正泰电器股份有限公司 | Selective protection circuit breaker |
| CN201655718U (en) * | 2009-12-09 | 2010-11-24 | 上海诺雅克电气有限公司 | Selective-protection circuit breaker |
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| Publication number | Publication date |
|---|---|
| CN101958205A (en) | 2011-01-26 |
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Application publication date: 20110126 Assignee: ZHEJIANG CHINT ELECTRICS Co.,Ltd. Assignor: SHANGHAI NOARK ELECTRIC Co.,Ltd. Contract record no.: X2021330000593 Denomination of invention: A selective protection circuit breaker Granted publication date: 20130116 License type: Common License Record date: 20211025 |