CN105428175A - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN105428175A CN105428175A CN201610007924.3A CN201610007924A CN105428175A CN 105428175 A CN105428175 A CN 105428175A CN 201610007924 A CN201610007924 A CN 201610007924A CN 105428175 A CN105428175 A CN 105428175A
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- CN
- China
- Prior art keywords
- single pole
- circuit breaker
- pole units
- snap close
- armature
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
The invention discloses a circuit breaker. The circuit breaker comprises an operation mechanism, one or more one monopole units and one or more electromagnetic short circuit protection mechanisms. The operation mechanism is connected with a moving contact in each monopole unit so as to connection/disconnection of the moving contact with/from a static contact of each monopole unit, and each monopole unit is arranged to cooperate with one corresponding electromagnetic short circuit protection mechanism. Each electromagnetic short circuit protection mechanism comprises an iron core which is arranged above the static contact of the monopole unit arranged to cooperate with the electromagnetic short circuit protection mechanism; a lock catch brake device which is arranged below the static contact and is hinged with the inside of the monopole unit through a shaft; and an elastic element which is arranged between the lock catch brake device and the monopole unit. According to the invention, when fault currents flow through the static contacts, the iron cores are magnetized and generate electromagnetic attraction, when the electromagnetic attraction is greater than the counterforce of the elastic elements, and the lock catch brake devices rotate towards the directions of the iron cores so that lock catches in the operation mechanism brake, the moving contacts and the static contacts in the monopole units are disconnected, and the fault currents are cut off accordingly.
Description
Technical field
The present invention relates to Low Voltage Electrical Apparatus, particularly relate to a kind of circuit breaker.
Background technology
Circuit breaker is the important electric elements in Low Voltage Electrical Apparatus, and as the electric elements of protection low-voltage distribution system, it can on-load on-off circuit, again can automatic trip under short circuit, overload and low-voltage (decompression) condition.Short-circuit protection is mechanism very important in circuit breaker, because the length of the operate time of short-circuit protection directly can affect the breaking capacity of circuit breaker.
Existing rotary type double-breakpoint breaker of plastic casing mainly comprises operating mechanism, one or more single pole units and electromagnet short-circuit protection, wherein: each single pole units comprises housing, arc control device, fixed contact and moving contact; Multiple single pole units forms a multipole circuit breaker side by side; Operating mechanism is positioned in one of them single pole units, is linked by the moving contact in axle and each single pole units, divides with the conjunction realized between the contact in each single pole units; Electromagnet short-circuit protection comprises iron core, flexible member and snap close actuating device, and snap close actuating device comprises armature location-plate and armature.
Chinese invention patent application CN101582353A discloses a kind of electromagnetic short current protective mechanism be used in circuit breaker.As Figure 7-8, this electromagnetic short current protective mechanism is configured as follows: iron core is U-shaped, and opening upwards is fixed on the fixed contact in single pole units; Snap close actuating device is positioned at above fixed contact, and is fixed on the housing of single pole units; Flexible member is supported between fixed contact and snap close actuating device; When a short circuit occurs, iron core attracts armature, and armature overcomes the counter-force of flexible member, and the snap close of band moving armature location-plate actuating operations mechanism, makes circuit breaker trip.
For three-pole breaker, the single pole units that operating mechanism is positioned at is called as B pole unit, and two other single pole units is called as A pole unit and C pole unit.In the circuit breaker shown in Fig. 7-8, operating mechanism overlaps with the placement space of electromagnetic short current protective mechanism, and this will cause only having A, C pole unit to install electromagnetic short current protective mechanism, and B pole unit cannot install electromagnetic short current protective mechanism.When B pole unit generation shorted to earth, because B pole unit does not have electromagnetic short current protective mechanism, so the operate time of B pole unit will be long, thus have impact on interrupting performance and the reliability of circuit breaker.When AB, BC pole is short-circuited, electromagnetic short current protective mechanism is housed so can only single ply protective be formed owing to only having a pole, if electromagnetic short current protective mechanism occurs abnormal, just cannot cuts off circuit rapidly, affect the reliability of circuit breaker.And when AC pole is short-circuited, because AC pole unit is all equipped with electromagnetic short current protective mechanism, so can form duplicate protection, the reliability of such circuit breaker is just higher.
Summary of the invention
One or more problems in view of the above, the invention provides a kind of circuit breaker of novelty.
According to the circuit breaker of the embodiment of the present invention, comprise operating mechanism, one or more single pole units and one or more electromagnetic short current protective mechanism.Wherein, the moving contact in operating mechanism and each single pole units link with realize between moving contact in each single pole units and fixed contact deciliter, each single pole units and corresponding electromagnetic short current protective mechanism are equipped with.Each electromagnetic short current protective mechanism comprises: iron core, is arranged at above the fixed contact in the single pole units be equipped with this electromagnetic short current protective mechanism; Snap close brake apparatus, is arranged at below fixed contact, is hinged inner in single pole units by axle; And flexible member, be arranged between snap close actuating device and single pole units.When fault current to be magnetized generation electromagnetic attraction by iron core during fixed contact, when electromagnetic attraction is greater than the counter-force of flexible member, snap close actuating device rotates to iron core direction, and the snap close in actuating operations mechanism makes moving contact in single pole units and fixed contact disjunction, thus disengagement failure electric current.When fault current is cut off, electromagnetic attraction disappears, and snap close actuating device, under the counter-force effect of flexible member, returns to initial position.
According in the circuit breaker of the embodiment of the present invention, snap close actuating device comprises armature and armature location-plate, wherein, armature location-plate becomes L shape, one end is positioning end, the other end is actuation ends, armature is fixed on positioning end, and the snap fit of actuation ends and operating mechanism realizes the disjunction of moving contact in single pole units and fixed contact.Particularly, positioning end is provided with one or more boss, armature is provided with the through hole mated with boss, armature is fixed on positioning end via one or more boss and through hole.
According in the circuit breaker of the embodiment of the present invention, flexible member becomes L shape, and its one end coordinates spacing with the housing wall of single pole units, and the other end coordinates with the location notch in armature location-plate, and now flexible member torsional deflection makes snap close actuating device away from iron core.
According in the circuit breaker of the embodiment of the present invention, the housing of single pole units be provided be positioned at below fixed contact, to install for snap close actuating device and the die cavity of motion.
According to the circuit breaker of the embodiment of the present invention for conventional circuit breaker, overall volume is less, and can shorten the drop-away time of circuit breaker, improves the reliability and stability of circuit breaker.
Accompanying drawing explanation
The following accompanying drawing of the application in this as a application's part for understanding the application.Execution mode shown in accompanying drawing and description thereof are used for explaining principle of the present invention.In the accompanying drawings:
Fig. 1 is the organigram of the circuit breaker according to the embodiment of the present invention;
Fig. 2 is the assembling structure schematic diagram of single pole units, electromagnetic short current protective mechanism, conductive plate and fixture in the circuit breaker shown in Fig. 1;
Fig. 3 is the organigram of the left shell of single pole units in the circuit breaker shown in Fig. 1;
Fig. 4 is the organigram of the right shell body of single pole units in the circuit breaker shown in Fig. 1;
Fig. 5 is the organigram according to the armature location-plate in the electromagnetic short current protective mechanism of the embodiment of the present invention;
Fig. 6 is the operation principle schematic diagram of the circuit breaker of the embodiment of the present invention;
Fig. 7-8 is organigrams of existing circuit breaker and electromagnetic short current protective mechanism wherein.
Embodiment
The characteristic sum exemplary embodiment of various aspects of the present invention will be described in detail below.In the following detailed description, propose many details, to provide complete understanding of the present invention.But, it will be apparent to those skilled in the art that the present invention can implement when not needing some details in these details.Below the description of embodiment is only used to by illustrating example of the present invention to provide to better understanding of the present invention.Any concrete configuration that the present invention proposes below being never limited to, but cover any amendment of element and parts, replacement and improvement under the premise of without departing from the spirit of the present invention.In the the accompanying drawings and the following description, known structure and technology are not shown, to avoid causing the present invention unnecessary fuzzy.
In order to understand the present invention better, below in conjunction with Fig. 1-6, the circuit breaker according to the embodiment of the present invention is described in detail with the electromagnetic short current protective mechanism be used in circuit breaker.
Fig. 1 is the organigram of the circuit breaker according to the embodiment of the present invention.As shown in Figure 1, operating mechanism 1, three single pole units 2, three electromagnetic short current protective mechanisms 3, three conductive plates 4 and three fixtures 5 are comprised according to the circuit breaker of the embodiment of the present invention.Wherein, operating mechanism 1 is positioned in middle single pole units 2, is linked, divide with the conjunction realized between the contact in each single pole units 2 by the moving contact in axle and each single pole units 2; Three single pole units 2 form a three-pole breaker side by side; Three electromagnetic short current protective mechanisms 3 lay respectively at upper static contact one end of three single pole units 2; Three conductive plates 4 are connected with the upper static contact of three single pole units 2 respectively by corresponding fixture 5.It should be noted that, three-pole breaker is only shown exemplarily here, but the single pole units that arbitrary number can be set as required and the electromagnetic short current protective mechanism, conductive plate and the fixture that are equipped with single pole units.
Fig. 2 is the assembling structure schematic diagram of single pole units, electromagnetic short current protective mechanism, conductive plate and fixture in the circuit breaker shown in Fig. 1.Fig. 3 is the organigram of the left shell of single pole units in the circuit breaker shown in Fig. 1.Fig. 4 is the organigram of the right shell body of single pole units in the circuit breaker shown in Fig. 1.Composition graphs 2-4 can find out, each single pole units 2 comprises the first housing (that is, left shell) 21 and the second housing (that is, right shell body) 22, moving contact 23, upper static contact 24 and lower fixed contact 25 that are equipped with face-to-face; Electromagnetic short current protective mechanism 3 comprises iron core 31, snap close actuating device 32, flexible member 33, axle 34 and fixed head 35.Wherein, iron core 31 is U-shaped, and Open Side Down, is positioned at the top of conductive plate 4, and conductive plate 4 is positioned at above upper static contact 24; Have a fixed head 35 below upper static contact 24, fixed head 35 is fixed in the first draw-in groove 211 on the first housing 21 and the second draw-in groove 221 on the second housing 22 by end face; Their threes to be compressed by fixed head 35 through iron core 31, conductive plate 4 and upper static contact 24 by fixture 5 successively.
Further, composition graphs 2-4 can find out, snap close actuating device 32 comprises armature 321 and armature location-plate 322; In the first housing 21 below upper static contact 24 and the second housing 22, there is the first die cavity 212 and the second die cavity 222 assembling for snap close actuating device 32 and move; Have in first die cavity 212 in blind hole 213, second die cavity 222 and have a through hole 223; With axle 34 successively through through hole 223, snap close actuating device 32, flexible member 33, blind hole 213, snap close actuating device 32 is hinged in single pole units 2; Flexible member 33 one end coordinates spacing with the first housing wall 214, second housing wall 224, and the other end coordinates with the location notch in armature location-plate 322.
Fig. 5 is the organigram according to the armature location-plate in the electromagnetic short current protective mechanism of the embodiment of the present invention.Composition graphs 2 to Fig. 5 can find out, armature location-plate 322 l-shaped; One end of armature location-plate 322 is positioning end 3222; Positioning end 3222 there are two boss 3223; Armature 321 there is the through hole coordinated with boss 3223; Armature 321 is fixed in armature location-plate 322; The other end of armature location-plate 322 is actuation ends 3224, coordinates, realize the dropout of operating mechanism 1 with snap close 11; First die cavity 212 of the first housing 21 and the second die cavity 222 both sides of the second housing 22 have the first consistent slot to make way 215 and the second slot to make way 225 of shape, step down for giving actuation ends 3224 motion.
Fig. 6 is the operation principle schematic diagram of the circuit breaker of the embodiment of the present invention.As shown in Figure 6, when short circuit occurs, when fault current is by upper static contact 24 and conductive plate 4, iron core 31 and armature 321 are magnetized, and produce electromagnetic attraction; When electromagnetic attraction is greater than the counter-force of flexible member 33, snap close actuating device 32 rotates to iron core 31 direction around axle 34, and snap close actuating device 32 activates snap close 11 after rotating to predetermined angle, makes the operating mechanism 1 of circuit breaker unlock dropout rapidly, realize circuit breaker tripping, thus disengagement failure electric current; After pending fault failure of current, electromagnetic attraction also disappears thereupon, and snap close actuating device 32, under the counter-force effect of flexible member 33, gets back to initial position.
In sum, according to the circuit breaker of the embodiment of the present invention relative to conventional circuit breaker, overall volume is less, and can shorten the drop-away time of circuit breaker, improves the reliability and stability of circuit breaker.
Below the present invention is described with reference to specific embodiments of the invention, but those skilled in the art all understand, various amendment, combination and change can be carried out to these specific embodiments, and the spirit and scope of the present invention by claims or its equivalents can not be departed from.In addition, any signal arrows in accompanying drawing should be considered to be only exemplary, instead of restrictive, indicates unless otherwise specifically.When term be also contemplated as the ability of separation or combination is not known time, the combination of assembly or step also will be considered to describe.
Claims (6)
1. a circuit breaker; this circuit breaker comprises operating mechanism, one or more single pole units and one or more electromagnetic short current protective mechanism; wherein; moving contact in described operating mechanism and each single pole units link with realize between moving contact in each single pole units and fixed contact deciliter; each single pole units and corresponding electromagnetic short current protective mechanism are equipped with, and each electromagnetic short current protective mechanism comprises:
Iron core, is arranged at above the fixed contact in the single pole units be equipped with this electromagnetic short current protective mechanism;
Snap close brake apparatus, is arranged at below described fixed contact, is hinged inner in described single pole units by axle;
Flexible member, is arranged between described snap close actuating device and described single pole units, wherein
When fault current to be magnetized generation electromagnetic attraction by iron core described during described fixed contact, when described electromagnetic attraction is greater than the counter-force of described flexible member, described snap close actuating device rotates to described iron core direction, the snap close activated in described operating mechanism makes moving contact in described single pole units and fixed contact disjunction, thus cuts off described fault current.
2. circuit breaker as claimed in claim 1, is characterized in that, when described fault current is cut off, described electromagnetic attraction disappears, and described snap close actuating device, under the counter-force effect of described flexible member, returns to initial position.
3. circuit breaker as claimed in claim 1, it is characterized in that, described snap close actuating device comprises armature and armature location-plate, wherein, described armature location-plate becomes L shape, one end is positioning end, the other end is actuation ends, and described armature is fixed on described positioning end, and the snap fit of described actuation ends and described operating mechanism realizes the disjunction of moving contact in described single pole units and fixed contact.
4. circuit breaker as claimed in claim 3, it is characterized in that, described positioning end is provided with one or more boss, and described armature is provided with the through hole mated with described one or more boss, described armature is fixed on described positioning end via described one or more boss and described through hole.
5. circuit breaker as claimed in claim 1, it is characterized in that, described flexible member becomes L shape, its one end coordinates spacing with the housing wall of described single pole units, the other end coordinates with the location notch in described armature location-plate, and now described flexible member torsional deflection makes described snap close actuating device away from described iron core.
6. circuit breaker as claimed in claim 5, is characterized in that, the housing of described single pole units is provided with and is positioned at die cavity below described fixed contact, that install for described snap close actuating device and move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610007924.3A CN105428175B (en) | 2016-01-06 | 2016-01-06 | Breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610007924.3A CN105428175B (en) | 2016-01-06 | 2016-01-06 | Breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105428175A true CN105428175A (en) | 2016-03-23 |
| CN105428175B CN105428175B (en) | 2018-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610007924.3A Active CN105428175B (en) | 2016-01-06 | 2016-01-06 | Breaker |
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| Country | Link |
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| CN (1) | CN105428175B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201242983Y (en) * | 2008-07-15 | 2009-05-20 | 浙江正泰电器股份有限公司 | Main contact device for selective protection circuit breaker |
| CN101582353A (en) * | 2009-06-08 | 2009-11-18 | 常熟开关制造有限公司(原常熟开关厂） | Electromagnetic short current protective mechanism for breaker |
| US20120186952A1 (en) * | 2011-01-12 | 2012-07-26 | Masaya Hatano | Switch with locking mechanism |
| CN205376440U (en) * | 2016-01-06 | 2016-07-06 | 北京人民电器厂有限公司 | Circuit breaker |
-
2016
- 2016-01-06 CN CN201610007924.3A patent/CN105428175B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201242983Y (en) * | 2008-07-15 | 2009-05-20 | 浙江正泰电器股份有限公司 | Main contact device for selective protection circuit breaker |
| CN101582353A (en) * | 2009-06-08 | 2009-11-18 | 常熟开关制造有限公司(原常熟开关厂） | Electromagnetic short current protective mechanism for breaker |
| US20120186952A1 (en) * | 2011-01-12 | 2012-07-26 | Masaya Hatano | Switch with locking mechanism |
| CN205376440U (en) * | 2016-01-06 | 2016-07-06 | 北京人民电器厂有限公司 | Circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105428175B (en) | 2018-04-27 |
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