CN1298003C - Small circuit breaker - Google Patents
Small circuit breaker Download PDFInfo
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- CN1298003C CN1298003C CNB200410044896XA CN200410044896A CN1298003C CN 1298003 C CN1298003 C CN 1298003C CN B200410044896X A CNB200410044896X A CN B200410044896XA CN 200410044896 A CN200410044896 A CN 200410044896A CN 1298003 C CN1298003 C CN 1298003C
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- arc
- circuit breaker
- miniature circuit
- contact
- moving contact
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Abstract
The present invention relates to a miniature circuit breaker which comprises a contact system, an arc extinction system, an operating mechanism, a free tripping mechanism, an over-current protection system, a short circuit protection system, an insulating casing, an operating handle and other functional units. A moving contact in the contact system is driven to move by the operating mechanism through the transmission of the operating handle, so the miniature circuit breaker is switched on and off and the control of electric power energy flow for an electric line is realized. By detecting the heat and magnetic effect of electric current, the miniature circuit breaker implements protection when the electric line generates overload, short circuit, etc. A plurality of homo-polar miniature circuit breakers are formed into a multi-polar miniature circuit breaker through the method that the operating handle, the free tripping mechanism, etc. are connected into one body. The multi-polar miniature circuit breaker can be used for the protection of multi-phase lines and multi-phase equipment.
Description
Technical field
The present invention relates to a kind of miniature circuit breaker with overcurrent protection and short-circuit protection.
Background technology
In a cell size scope, the miniature circuit breaker that has comprised functional units such as contact system, arc quenching system, operating mechanism and free tripping mechanism, over-current protection system, short circuit protection system and insulation crust, operating grip, the moving contact that operating mechanism is driven in the contact system by the handle transmission moves, miniature circuit breaker is connected and disjunction, realized control electric wiring electric power energy stream; By sensing, electric wiring is transshipped, implements during fault such as short circuit protection to the effect of the heat of electric current and magnetic.
The structure of a plurality of cell sizes constitutes multipole miniature circuit breaker by operating grip, free tripping mechanism etc. is connected as one.The multipole small-size circuit breaker can be used for the protection of multi-phase circuit and heterogeneous equipment.The multipole small-size circuit breaker is realized multipole simultaneous operation by the operating grip that links into an integrated entity; It is former thereby when occurring requiring the signal of separating brake to produce overload, short circuit etc. at least one phase circuit, disconnects simultaneously by the free tripping mechanism realization multipole small-size circuit breaker that links into an integrated entity, and protects the circuit or the equipment of whole polyphase system.
When contact between dynamic/static contact and when forming enough contact pressures, miniature circuit breaker is connected electric loop, and the variation of the local temperature by bimetallic element sensing miniature circuit breaker is judged and the size of current of circuit system realized excess current protective function.Promptly remain on rated current that miniature circuit breaker sets and when following when loop current, the local temperature deficiency of the formed miniature circuit breaker of thermal effect that this electric current produces so that the displacement that the thermal deformation of bimetallic element produces promote free tripping mechanism and trip; Otherwise; when the electric current in loop surpasses the rated current of setting; the local temperature of miniature circuit breaker raises; bimetallic element produces enough thermal deformations; the promotion free tripping mechanism is triped; operating mechanism drives moving contact and opens apace under the effect of spring, cut off current circuit, realizes overcurrent protection.
Short circuit protection system is by the variation of solenoid electromagnet loop inductance electric current, and when loop current is in the short-circuit protection value of normal value or setting when following, the moving iron core of solenoid electromagnet remains on initial position under the effect of reaction spring; When the current circuit fault that is short-circuited, electric current sharply increases, and acts on the moving electromagnetic force unshakable in one's determination of solenoid electromagnet and overcomes the spring counter-force; promote push rod and act on free tripping mechanism, mechanism trips, and drives moving contact and opens apace; cut off current circuit, realize short-circuit protection.
The effect of free tripping mechanism is when existing in the loop when being similar to short trouble, or when having other the command signal of No switching on, even the handle of operation miniature circuit breaker desires to make it to close a floodgate, the moving contact of miniature circuit breaker still remains on open position; And occur similar fault such as overload, short circuit when the loop and when sending the separating brake instruction, miniature circuit breaker is threaded off, the cut-out current circuit.
The effect of operating mechanism is the effect of transmitting operating grip, drive the moving contact closure or the disjunction of contact system, to reach between dynamic/static contact and keep enough contact pressures in order to make in the process, and make moving contact produce enough excess of stroke, and in dynamic/static contact disconnection process in order to realize metering function and to protections such as circuit, power consumption equipments, and require moving contact that enough opening speeds are arranged; In order to make miniature circuit breaker enough dielectric strengths be arranged, have enough distances of opening between dynamic/static contact and must make in off-state.
The effect of arc quenching system is when the big breaking current of the dynamic and static contact disjunction of miniature circuit breaker, by the effect to the electric arc that produced, realizes that electric current in the restriction electric wiring continues the trend that increases, i.e. metering function, and arc extinction the most at last.When electric arc enters arc control device, be separated into many sections by the metal gate sheet in the arc control device, every section electric arc all produces a cathode drop and an anode drop on the metal gate sheet, the pressure drop of whole electric arc is improved rapidly, and makes electric arc cooling and extinguishing rapidly.
In traditional miniature circuit breaker, generally do not consider effect and caused other effects thereof of flexible connection part in the magnetic blow-out loop of series connection, because the electric current that the flexible connection part is carried is identical with the current value of the conductive part branch carrying of other rigid structures, its magnetic field effect should not ignored the influence of arc blow-out effect.
In addition, in the series connection magnetic blow-out loop of traditional miniature circuit breaker, before the electric arc that produces because of the disjunction short circuit current between dynamic/static contact is entering arc control device, finish electric arc driven (quiet) contact guide arc plate and shift and pass through the arc road of leading between arc plate and the arc leading angle, just can enter arc control device, in this process, the arc root of electric arc is transferred to the moment of leading the arc plate from moving contact, a sudden change can take place to the electric power of arcing in the magnetic blow-out loop, because after the arc root shifts, variation has taken place in the flow cycle of electric current, promptly Ci Shi electric current is not by flexible connection and moving contact, effectively the physical dimension in magnetic blow-out loop has shortened, the reaction force attenuation of magnetic blow-out, electric arc enters arc control device through the arc road and becomes more difficult.
Molded insulation crust is still installed the frame of various parts except the basic insulation that miniature circuit breaker is provided, therefore, molded insulation crust must have enough electrical strengths and mechanical strength, could satisfy the performance requirement of miniature circuit breaker.
Summary of the invention
The objective of the invention is to design a kind of miniature circuit breaker,
According to design provided by the present invention, in the plastic insulation shell, be equipped with by leading the contact arc-extinguishing system that arc plate, moving contact, fixed contact, magnetic conductive iron sheet, arc sheet and arc control device constitute; The operating mechanism and the free tripping mechanism that constitute by lever, tripping part, spring, connecting rod and handle; By bimetal leaf, pull bar, adjustment screw with play the over-current protection system that the arc plate constitutes of leading of support effect; The short circuit protection system that constitutes by electromagnet and push rod; it is characterized in that; in operating mechanism and free tripping mechanism; one end of spring is installed on the spring fixed seat of shell; the other end contacts with the spring installed surface of moving contact afterbody; the pin joint of moving contact and lever is a fulcrum; spring is around the fulcrum clockwise direction to the direction of the opplied moment of moving contact; the middle part of lever utilizes hinging supporting shaft to be installed on the shell; the stop face that a moving contact is arranged on lever; when miniature circuit breaker is in open mode; moving contact rests on the stop face of lever, and after the complete closure of dynamic/static contact, shape in an angle between the stop face of lever and the moving contact; one end and the rod hinge connection of lever, the other end and the handle of connecting rod are hinged.。
Lever and tripping part utilize fulcrum shaft to be hinged, this fulcrum shaft is near the pin joint of lever and connecting rod, on another angle of tripping part slide bar is installed, this slide bar is positioned at deep-slotted chip breaker, spring contacts with the spring installed surface of moving contact afterbody after passing the tripping part, is connected back-moving spring between the tripping part is near the close position of hinging supporting shaft on the position of fulcrum shaft and the lever.
Connect flexible connection on moving contact, the flexible connection other end is connected with bimetal leaf, makes flexible connection become " U " shape structure, plane that should " U " shape structure and the plane parallel that dynamic/static contact is constituted, and be tending towards the planes overlapping that constituted with dynamic/static contact.The opening direction of " U " shape structure of flexible connection is towards the head of moving contact, and the part of " U " shape of flexible connection bottom is contained in " U " shape chamber of lever.
In contact arc-extinguishing system, in arc control device, the both sides of dynamic and static contact are provided with arc separating wall and magnetic conduction sheet, and the used material of arc separating wall discharges and a kind ofly can produce the gas of auxiliary blow-out effect under the high temperature action of electric arc.Arc leading angle is set on fixed contact, a minimum range point is set leading between arc plate and the arc leading angle, this point is positioned at the middle part of leading the arc plate, and near the electric arc porch of arc control device, the minimum range at this some place is more than or equal to the distance of opening between dynamic/static contact.
In over-current protection system, an end of pull bar is connected with bimetal leaf, and the other end and tripping part are hinged, at the other end of bimetal leaf adjustment screw is arranged.In short circuit protection system, push rod is positioned at screwed pipe shape electromagnet, and the outer end of push rod can contact with the tripping part.
Miniature circuit breaker is combined side by side by a plurality of unit; each unit all comprises contact arc-extinguishing system, operating mechanism and free tripping mechanism, over-current protection system and short circuit protection system; utilize bearing pin fixedly connected between adjacent two unit, the handle of each unit utilizes a taper knob to link together.
Description of drawings
Fig. 1-miniature circuit breaker open position figure.
Fig. 2-miniature circuit breaker make position figure.
Fig. 3-contact, arc quenching system profile (rotation).
The structure chart that connects free tripping mechanism in Fig. 4-multipole small-size circuit breaker.
The structure chart that connects multipole handle in Fig. 5-multipole small-size circuit breaker.
Embodiment
Fig. 1, Fig. 2, Figure 3 shows that the miniature circuit breaker of a unit.In the plastic insulation shell, be equipped with by leading the contact arc-extinguishing system that arc plate 1, moving contact 3, fixed contact 21, magnetic conductive iron sheet 26, arc sheet 25 and arc control device 23 constitute; The operating mechanism and the free tripping mechanism that constitute by lever 14, tripping part 18, spring 16, connecting rod 15 and handle 17; By bimetal leaf 6, pull bar 10, adjustment screw 4 with play the over-current protection system that arc plate 1 constitutes of leading of support effect; The short circuit protection system that constitutes by electromagnet 20 and push rod 19.
Shell proper metal closing-up, unit (utmost point) structure of a miniature circuit breaker of formation; Again a miniature circuit breaker unit is combined into a plurality of unit side by side; each unit all comprises contact arc-extinguishing system, operating mechanism and free tripping mechanism, over-current protection system and short circuit protection system; utilize bearing pin 28 fixedly connected between adjacent two unit; see Fig. 4, the handle 17 of each unit utilizes a taper knob 29 to link together to see Fig. 5.Constitute multipole miniature circuit breaker.
Wherein, conductive components such as last lug plate, solenoid 20, fixed contact 21 connect with spot welding, and static iron core and yoke, fixed contact riveted are formed; Moving contact 3, flexible connection 8, bimetal leaf 6, lead between the parts such as arc plate 1, conducting strip 5, binding post 7 and to adopt the mode of electric resistance welding or resistance brazing to weld together; Moving contact 3 adopts monolateral interference fit riveted way to form with lever 14, lever 14 with tripping part 18, and the main shaft of lever is fixed on the shell (pedestal), and other part is packed into by diagram and got final product.
In this operating mechanism, one end of spring 16 is installed on the spring fixed seat of shell (pedestal), one end is installed on the spring installed surface of moving contact 3 afterbodys, a salient point that is used for retainer spring 16 is arranged on this installed surface, moving contact 3 is a fulcrum 9 with the hinge point of lever 14, the direction of the opplied moment of 16 pairs of moving contacts 8 of spring is around fulcrum 9 clockwise directions, the middle part of lever 14 utilizes hinging supporting shaft 11 to be installed on the shell, the stop face that a moving contact is arranged on lever 14, when miniature circuit breaker is in open mode, moving contact 3 rests on the stop face of lever 14, rotate counterclockwise handle 17 to horizontal level, when dynamic/static contact begins to contact, because the effect of spring 16 makes moving contact have certain initial pressure, after the complete closure of dynamic/static contact, shape constitutes the overtravel of moving contact in an angle between the stop face of lever 14 and the moving contact 3, and the end pressure between dynamic/static contact.One end and the connecting rod 15 of lever 14 are hinged, and the other end of connecting rod 15 and handle 17 are hinged.
Operate the handle 17 of miniature circuit breaker counterclockwise, drivening rod 16 acts on lever 14, moving contact 3 is moved clockwise, when handle 17 is positioned at horizontal level, moving contact 3 begins to contact with fixed contact 21, when handle 17 moves to normal on-position, meet the requirements of overtravel and contact pressure between dynamic/static contact, miniature circuit breaker is finished the operation of connection process; When the clockwise operating grip 17 of the on-state of miniature circuit breaker was crossed the dead point of mechanism, mechanism's lever 14 was opened to open position rapidly under the effect of spring.
Owing to adopt spring 16 as mechanism's spring and have the effect of touch spring concurrently, guaranteeing have under the prerequisite of enough pressure between dynamic/static contact, make position from the open position of mechanism to mechanism, can make the deflection of spring littler, help the stability of spring and the raising in useful life, help improving the operating handle of miniature circuit breaker, improve the performance of miniature circuit breaker; One of effect of lever is the main drive disk assembly of mechanism, have concurrently in addition flexible connection holder function and cooperate the tripping part to form the function of free tripping mechanism.Therefore, the design of this utility model has demonstrated fully the design philosophy of using more, it when normal running principle motion according to quadric chain, when mechanism trips, be reduced to reaction spring and act on an independent lever motion that has rotating fulcrum, remove the moment of inertia of other rod members to greatest extent, improve the opening speed of mechanism, and simple in structure, reliable in action is easy to manufacture and assemble.
In traditional miniature circuit breaker, generally do not consider effect and caused other effects thereof of flexible connection part in the magnetic blow-out loop of series connection, because the electric current that the flexible connection part is carried is identical with the current value of the conductive part branch carrying of other rigid structures, its magnetic field effect should not ignored the influence of arc blow-out effect.One of characteristics of the present invention are to consider this factor fully, on moving contact 3, connect flexible connection 8, flexible connection 8 other ends are connected with bimetal leaf 6, make 8 one-tenth one " U " shape of flexible connection structure, the opening direction of " U " shape structure of flexible connection 8 is towards the head of moving contact 3, and the part of " U " shape of flexible connection 8 bottom is contained in " U " shape chamber of lever 14." U " shape plane that flexible connection constitutes is set to the plane parallel that is constituted with dynamic/static contact and is tending towards and this planes overlapping, makes whole magnetic blow-out loop more complete, to obtain best arc blow-out effect.
In addition, in the series connection magnetic blow-out loop of traditional miniature circuit breaker, before the electric arc that produces because of the disjunction short circuit current between dynamic/static contact is entering arc control device, finish electric arc driven (quiet) contact guide arc plate and shift and pass through the arc road of leading between arc plate and the arc leading angle, just can enter arc control device, in this process, the arc root of electric arc is transferred to the moment of leading the arc plate from moving contact, a sudden change can take place to the electric power of arcing in the magnetic blow-out loop, because after the arc root shifts, variation has taken place in the flow cycle of electric current, promptly Ci Shi electric current is not by flexible connection and moving contact, effectively the physical dimension in magnetic blow-out loop has shortened, the reaction force attenuation of magnetic blow-out, electric arc enters arc control device through the arc road and becomes more difficult.For this reason, in the present invention, arc leading angle 30 is set on fixed contact 21, a minimum range point is set leading between arc plate 1 and the arc leading angle 30, form the limit of an electric arc moving process, this point is positioned at the middle part of leading arc plate 1, and the electric arc porch of close arc control device 23, and the minimum range at this some place is more than or equal to the distance of opening between dynamic/static contact.Electric arc arc root between sound is touched is transferred to when leading on the arc plate electric arc at fixed contact and lead arcing between the arc plate, the arc root is being led the distance between arc plate and fixed contact arc leading angle led that the arc length that constitutes between point initial on the arc plate and fixed contact is greater than the limit place, therefore, electric arc will be promptly, naturally carry out the transition on the limit, the electromagnetic force that electric arc at the new antipodal points place, magnetic blow-out loop that forms between by first half of leading the arc plate and arc leading angle on the pole location applies is enough big, and the limit place is shorter relatively apart from the distance of arc control device inlet, so electric arc very F.F. is gone in the arc control device.This structure can realize attracting electric arc to enter the acceleration arc blowing function of arc control device by the arc road well.
In contact arc-extinguishing system, in arc control device 23, the both sides of dynamic and static contact 3,21 are provided with arc separating wall 25 and magnetic conduction sheet 26, a kind of polyphosphazene polymer amide resin of arc separating wall 22,25 usefulness is made, under the high temperature action of electric arc, discharge a kind of energy and produce the gas of auxiliary blow-out effect, its acting body can increase the metering function of the pressure of arc-plasma, the temperature of reduction arc-plasma, the resistance of increase arc-plasma etc. now; Magnetic conduction sheet 26 also is arranged on the both sides of dynamic/static contact, to increase the magnetic field intensity of part, arc road, makes the magnetic blow-out loop produce stronger clamping action and stronger arc blow-out effect to arc-plasma.
In over-current protection system, an end of pull bar 10 is connected with bimetal leaf 6, and the other end and tripping part 18 are hinged, at the other end of bimetal leaf 6 adjustment screw 4 is arranged.Overload protection function partly adopts the directly-heated type bimetal leaf; the local heat effect that produces when overload current occurring makes the bimetal leaf bending; drive the pull bar that is connected with tripping part 18 in the free tripping mechanism, mechanism is triped, the moving contact of miniature circuit breaker is opened to open position.
In short circuit protection system, push rod 19 is positioned at screwed pipe shape electromagnet 20, and the outer end of push rod 19 can contact with tripping part 18.Short circuit wink, moving defencive function part triped mechanism by the tripping part 18 that the promotion push rod 19 moving unshakable in one's determination in the electromagnet 20 acts on free tripping mechanism, and miniature circuit breaker is opened to open position; After mechanism triped, the acting surface and the push rod 19 of the push rod 19 on the tripping part hightailed, and made the opening procedure of mechanism avoid push rod 19 to put on the frictional resistance of tripping part 18 and entire mechanism.
27 is the mold insulation shell of miniature circuit breaker among Fig. 3, and molded insulation crust is still installed the frame of various parts except the basic insulation that miniature circuit breaker is provided.
18a among Fig. 4,18b refer to two tripping parts in the mutual miniature circuit breaker unit arranged side by side respectively, and 19a and 19b refer to push rod in two mutual miniature circuit breakers arranged side by side respectively.
Claims (10)
1, a kind of miniature circuit breaker is equipped with in the plastic insulation shell by leading the contact arc-extinguishing system that arc plate (1), moving contact (3), fixed contact (21), magnetic conductive iron sheet (26), arc sheet (25) and arc control device (23) constitute; Operating mechanism and free tripping mechanism by lever (14), tripping part (18), spring (16), connecting rod (15) and handle (17) formation; By bimetal leaf (6), pull bar (10), adjustment screw (4) with play the over-current protection system that arc plate (1) constitutes of leading of support effect; Short circuit protection system by electromagnet (20) and push rod (19) formation; it is characterized in that; in operating mechanism and free tripping mechanism; one end of spring (16) is installed on the spring fixed seat of shell; the other end contacts with the spring installed surface of moving contact (3) afterbody; moving contact (3) is fulcrum (9) with the pin joint of lever (14); spring (16) is around fulcrum (9) clockwise direction to the direction of the opplied moment of moving contact (3); the middle part of lever (14) utilizes hinging supporting shaft (11) to be installed on the shell; the stop face that a moving contact (3) is arranged on lever (14); when miniature circuit breaker is in open mode; moving contact (3) rests on the stop face of lever (14); after the complete closure of dynamic/static contact; shape in an angle between the stop face of lever (14) and the moving contact (3); one end of lever (14) and connecting rod (15) are hinged, and the other end of connecting rod (15) and handle (17) are hinged.
2, miniature circuit breaker according to claim 1 is characterized in that, a salient point that is used for retainer spring (16) is arranged on the spring installed surface of moving contact (3) afterbody.
3, miniature circuit breaker according to claim 1, it is characterized in that, lever (14) utilizes fulcrum shaft (12) to be hinged with tripping part (18), this fulcrum shaft (12) is near the pin joint of lever (14) with connecting rod (15), on another angle of tripping part (18) slide bar is installed, this slide bar is positioned at deep-slotted chip breaker, spring (16) passes tripping part (18) back and contacts with the spring installed surface of moving contact (3) afterbody, goes up near between the position of hinging supporting shaft (11) with lever (11) near the position of fulcrum shaft (12) at tripping part (18) to be connected back-moving spring (13).
4, miniature circuit breaker according to claim 1, it is characterized in that, go up connection flexible connection (8) at moving contact (3), flexible connection (8) other end is connected with bimetal leaf (6), make flexible connection (8) become " U " shape structure, plane that should " U " shape structure and the plane parallel that moving contact (3), fixed contact (21) are constituted, and be tending towards and planes overlapping that moving contact (3), fixed contact (21) are constituted.
5, miniature circuit breaker according to claim 4 is characterized in that, the opening direction of " U " shape structure of flexible connection (8) is towards the head of moving contact (3), and the part of " U " shape of flexible connection (8) bottom is contained in " U " shape chamber of lever (14).
6, miniature circuit breaker according to claim 1, it is characterized in that, in contact arc-extinguishing system, in arc control device (23), the both sides of moving contact (3), fixed contact (21) are provided with arc separating wall (22,25) and magnetic conduction sheet (26), the used material of arc separating wall (22,25) discharges and a kind ofly can produce the gas of auxiliary blow-out effect under the high temperature action of electric arc.
7, miniature circuit breaker according to claim 6, it is characterized in that, arc leading angle (30) is set on fixed contact (21), a minimum range point is set leading between arc plate (1) and the arc leading angle (30), this point is positioned at the middle part of leading arc plate (1), and near the electric arc porch of arc control device (23), the minimum range at this some place is more than or equal to the open distance of moving contact (3) with fixed contact (21).
8, miniature circuit breaker according to claim 1 is characterized in that, in over-current protection system, an end of pull bar (10) is connected with bimetal leaf (6), and the other end and tripping part (18) are hinged, and adjustment screw (4) is positioned at the other end of bimetal leaf (6).
9, miniature circuit breaker according to claim 1 is characterized in that, in short circuit protection system, push rod (19) is positioned at screwed pipe shape electromagnet (20), and the outer end of push rod (19) can contact with tripping part (18).
10, miniature circuit breaker according to claim 1; it is characterized in that; miniature circuit breaker is combined side by side by a plurality of unit; each unit all comprises contact arc-extinguishing system, operating mechanism and free tripping mechanism, over-current protection system and short circuit protection system; utilize bearing pin (28) fixedly connected between adjacent two unit, the handle of each unit (17) utilizes a taper knob (29) to link together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410044896XA CN1298003C (en) | 2004-05-25 | 2004-05-25 | Small circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410044896XA CN1298003C (en) | 2004-05-25 | 2004-05-25 | Small circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1585064A CN1585064A (en) | 2005-02-23 |
| CN1298003C true CN1298003C (en) | 2007-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410044896XA Expired - Fee Related CN1298003C (en) | 2004-05-25 | 2004-05-25 | Small circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN1298003C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005041232B4 (en) * | 2005-08-31 | 2009-11-26 | Abb Ag | Electrical switching device |
| JP4921930B2 (en) * | 2006-11-10 | 2012-04-25 | 河村電器産業株式会社 | Circuit breaker |
| CN102969210B (en) * | 2011-08-31 | 2017-06-09 | 首瑞（北京）投资管理集团有限公司 | Circuit breaker static contact |
| CN102568948B (en) * | 2011-12-13 | 2014-06-18 | 科都电气有限公司 | Improved circuit breaker |
| CN102751140B (en) * | 2012-07-05 | 2014-12-10 | 同济大学 | Multifunctional switch apparatus with automatic reclosing function |
| CN102832062B (en) * | 2012-08-28 | 2015-02-04 | 北京人民电器厂有限公司 | Electrical appliance device with arc separating member |
| CN207425751U (en) * | 2017-06-08 | 2018-05-29 | 李文杰 | A kind of high-breaking miniature breaker |
| CN108878226A (en) * | 2018-07-13 | 2018-11-23 | 浙江正泰电器股份有限公司 | Breaker |
| CN109087828A (en) * | 2018-08-09 | 2018-12-25 | 西安中熔电气股份有限公司 | A kind of contactor construction of novel belt excitation cutting function |
| CN109509687B (en) * | 2018-11-06 | 2024-01-19 | 安士缔(中国)电气设备有限公司 | Be applied to short circuit device of circuit breaker |
| CN112133610B (en) * | 2020-09-16 | 2023-01-31 | 华翔翔能科技股份有限公司 | Intelligent circuit breaker with visualization function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636760A (en) * | 1985-04-10 | 1987-01-13 | Westinghouse Electric Corp. | Low voltage circuit breaker with remote switching function |
| EP0537090A1 (en) * | 1991-10-10 | 1993-04-14 | Schneider Electric Sa | Electric circuit breaker with insertion of extra-turns in the magnetic trip mechanism winding |
| JPH06290694A (en) * | 1993-03-31 | 1994-10-18 | Matsushita Electric Works Ltd | Circuit breaker |
| JP2514718B2 (en) * | 1989-07-26 | 1996-07-10 | 松下電工株式会社 | Circuit breaker |
| CN2457727Y (en) * | 2000-10-13 | 2001-10-31 | 郑巨华 | High split small braker |
| CN1325123A (en) * | 2000-05-18 | 2001-12-05 | 上海奥富捷电气终端成套厂 | Multichannel breaker with modular breaking units |
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2004
- 2004-05-25 CN CNB200410044896XA patent/CN1298003C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4636760A (en) * | 1985-04-10 | 1987-01-13 | Westinghouse Electric Corp. | Low voltage circuit breaker with remote switching function |
| JP2514718B2 (en) * | 1989-07-26 | 1996-07-10 | 松下電工株式会社 | Circuit breaker |
| EP0537090A1 (en) * | 1991-10-10 | 1993-04-14 | Schneider Electric Sa | Electric circuit breaker with insertion of extra-turns in the magnetic trip mechanism winding |
| JPH06290694A (en) * | 1993-03-31 | 1994-10-18 | Matsushita Electric Works Ltd | Circuit breaker |
| CN1325123A (en) * | 2000-05-18 | 2001-12-05 | 上海奥富捷电气终端成套厂 | Multichannel breaker with modular breaking units |
| CN2457727Y (en) * | 2000-10-13 | 2001-10-31 | 郑巨华 | High split small braker |
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| Publication number | Publication date |
|---|---|
| CN1585064A (en) | 2005-02-23 |
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