CN2715330Y - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN2715330Y CN2715330Y CNU03238436XU CN03238436U CN2715330Y CN 2715330 Y CN2715330 Y CN 2715330Y CN U03238436X U CNU03238436X U CN U03238436XU CN 03238436 U CN03238436 U CN 03238436U CN 2715330 Y CN2715330 Y CN 2715330Y
- Authority
- CN
- China
- Prior art keywords
- cross
- bar
- fixed contact
- circuit
- circuit breaker
- Prior art date
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
-
- 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
- H01H71/04—Means for indicating condition of the switching device
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- Breakers (AREA)
Abstract
The utility model discloses a circuit breaker used to cut off the circuit, comprising a switching mechanism installed between a power end and a load end. A bimetal device connected with the power end works when over current occurs and an armature connected with the power end works when instantaneous over current occurs. A cross bar rotates under the action of the driving force of bimetal device and the armature to make the switching mechanism tripping and a tripping button is used to rotate the cross bar when user pushes the tripping button to know whether the breaker works normally. Thus, the work of the tripping button can be used to test whether the tripping operation caused by over current or instantaneous over current is normal and to test whether the switching mechanism works normally.
Description
Technical field
The present invention relates to circuit breaker, more precisely, relate to a kind of circuit breaker, the trip operation that is caused by overcurrent and instantaneous overcurrent by test and the operate as normal of mechanical trip operation can improve the reliability of equipment.
Background technology
Usually, circuit breaker is a kind of by overcurrent break function and instantaneous overcurrent break function, the electric equipment of protection load equipment and personal safety.The overcurrent break function is to have produced on the circuit to surpass tens percent during to the overcurrent of hundreds of of rated current between power supply and load, open circuit within the predetermined time, the instantaneous overcurrent break function is to have produced on circuit when surpassing the overcurrent of several times of rated current, immediately open circuit.
Fig. 1 has shown the profile of the circuit breaker of prior art, and Fig. 2 has shown the amplification profile of trip button in the circuit breaker of prior art.
Existing circuit breaker comprises: switching mechanism 106, it comprises a fixed contact that links to each other with power supply 102, a fixed contact that links to each other with electric loading 104, one is installed between fixed contact 102 and 104, to/contact/separate with 104 from fixed contact 102, thus switch to the connection of circuit or the mobile contactor of open position; Trip device is used for starting switching mechanism 106 to circuit open position when overcurrent or instantaneous overcurrent take place; Handle 108 is used for after the reason of removing overcurrent or instantaneous overcurrent, and the switching mechanism that will be in circuit open position is forced the return circuit link position, perhaps forces switching mechanism 106 is switched to circuit open position; And trip button 110, whether the ON/OFF work that is used to test switching mechanism 106 is normal.
Trip device comprises: pusher dog 112, and it is supported and rotate on the wall of the housing of circuit breaker, can make its rotation from the pressure of trip button 110; With driving lever 114, after lock-out state release, driving lever 114 is urged to circuit open position with switching mechanism 106, i.e. trip position owing to the rotation of pusher dog 112.
As shown in Figure 2, trip button 110 is inserted in the patchhole 118 of Shell of circuit breaker 116 tops formation, and can move in vertical direction, and after the user promoted, trip button 110 was got back to the home position under the elastic force effect of spring 120.
The top of pusher dog 112 is supported, thereby can rotate on the wall of Shell of circuit breaker 116, and the part of pusher dog 112 contacts with trip button 110, and other parts contact with driving lever support 124, thus locking or discharge driving lever 114.
In addition, driving lever 114 is supported, thereby can rotate on the wall of Shell of circuit breaker 116, and an end of driving lever 114 remains locking by driving lever support 124 or discharges.The rotating shaft of driving lever 114 links to each other with switching mechanism 106, and the rotation of driving lever 114 triggers switching mechanism 106 to circuit open position, i.e. trip position motion.
In the circuit breaker of above-mentioned prior art, when having produced overcurrent or instantaneous overcurrent when electric current flows to the circuit of fixed contact 104 from fixed contact 102, thereby circuit are cut off in switching mechanism 106 tripping operations.
In addition, can test the work of switching mechanism 106 by pressing trip button 120.
Just, when pressing trip button 120, pusher dog 112 rotations, correspondingly, and driving lever 114 contact pusher dogs 112, driving lever 114 is discharged and rotation by driving lever support 124, thereby starts switching mechanism 106 to trip position.
At this moment, when switching mechanism 105 normal tripping operations, the user can judge that switching mechanism 106 runs well.When switching mechanism 106 does not trip, can judge in the element of switching mechanism 106 to have fault or damage.Here, the element of switching mechanism 106 is mobile contactor and fixed contact, a support that is used to support the contactor that will rotate, the height connecting rod that is connected respectively to support shaft and driving lever 114 central shafts of revolving force is provided for support, be connected to height connecting rod central shaft and spring that the other end links to each other with handle 108 with one one end, when driving lever 114 was released, this spring-actuated height connecting rod was to folded state.
According to above-mentioned existing circuit breaker, can determine when pressing trip button 110 whether switching mechanism 106 mechanically runs well, still, can not determine whether each element of trip device ran well when overcurrent or instantaneous overcurrent took place.
Just, by the functional reliability of the element of the trip device of overcurrent or instantaneous overcurrent running because multiple reason (as foozle, open circuit or frictional force) and reduce, therefore in order to determine whether tripping operation work is normally carried out under overcurrent or instantaneous overcurrent, overcurrent or instantaneous overcurrent should be put on the cutout.Therefore, be difficult to testing equipment, the testing time increases, and testing cost also increases.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of circuit breaker, this circuit breaker can be determined whether operate as normal of switching mechanism, also can determine whether operate as normal under overcurrent or instantaneous overcurrent of trip device according to the work of trip button.
In order to reach purpose of the present invention, as enforcement and broadly described here, a kind of circuit breaker is provided, comprise: switching mechanism, rise and comprise a fixed contact that is connected to power supply, a fixed contact that is connected to electric loading, one be installed between the fixed contact, can to/move to contact/separation point position from fixed contact, be used to connect or deenergization and load between the mobile contactor of circuit; A bimetallic devices that links to each other with the fixed contact that is connected to load is when the overcurrent that is used for producing at circuit surpasses predetermined ratio of rated current, in the given time by the crooked power that provides; An armature that links to each other with the fixed contact that is connected to power supply is used for providing actuating force immediately when overcurrent surpasses several times of rated current; A cross-bar that rotates under the power of bimetallic devices or armature is used to make switching mechanism to skip to circuit open position; With a trip button, be used for when the user presses it, providing the cross-bar rotation required power, with test both opens device operate as normal whether.
By following detailed description, in conjunction with the accompanying drawings, can more be expressly understood above-mentioned and other purpose of the present invention, feature, aspect and advantage.
Description of drawings
Accompanying drawing helps to understand better the present invention, and at this in conjunction with a part that constitutes the application, the description of drawings embodiments of the invention and and specification explain principle of the present invention together.
In the accompanying drawing:
Fig. 1 has shown the profile of the circuit breaker of prior art;
Fig. 2 has shown the amplification profile of trip button in the circuit breaker of prior art;
Fig. 3 has shown the profile of circuit breaker of the present invention;
Fig. 4 has shown the enlarged drawing of A part among Fig. 3;
Fig. 5 has shown the perspective view of the trip button of circuit breaker of the present invention.
Embodiment
Referring now to accompanying drawing embodiments of the invention are described.
Can have a plurality ofly, introduce most preferred embodiment below according to embodiments of the invention.
Fig. 3 has shown the profile of circuit breaker of the present invention.
Circuit breaker of the present invention comprises: switching mechanism 6, comprise a fixed contact 2 that is connected to power supply, 4, one of fixed contact that are connected to electric loading is installed between fixed contact 2 and 4, can to/move to contact/separation point position from fixed contact 2 and 4, be used to be connected or deenergization and load between the mobile contactor 18 of circuit; A bimetallic devices 8 is used for when overcurrent surpasses rated current tens percent to hundreds of, and is crooked in the given time so that actuating force to be provided; Armature 10 when having produced the overcurrent that surpasses several times of rated current, is wrapped in the coil magnetizing on the bimetallic devices 8 and spurs, thereby instantaneous actuating force is provided; Trip button 12 is used for whether operate as normal of test both opens device; With a trip device, be used under from the power of trip button 12, from the power of bimetallic devices 8 or effect from the power of armature 8, with switching mechanism 6 trippings to circuit open position.Circuit breaker of the present invention further comprises a handle 14 that is connected to switching mechanism 6, is used for and will be in tripped condition, and promptly the circuit breaker of circuit open position is returned to the ifq circuit link position, or forces open circuit.
As shown in Figure 4, trip device comprises: trip button 12; Bimetallic devices 8; Armature 10; Support the cross-bar 24 that rotates by Shell of circuit breaker 16, it rotates under any one power effect in from trip button 12, bimetallic devices 8 or armature 10; Firing device 26 discharges the back rotation in cross-bar 24 rotations with it; With pusher dog 28, be used for rotation by firing device 26, discharge the lock-out state of the driving lever 30 that is connected to switching mechanism 6.
As shown in Figure 4, trip button 12 is repeatedly crooked synthetic resin elements, and the patchhole 32 that housing 16 upper surfaces form is inserted on the top of trip button 12, can move in vertical direction; The bottom of trip button 12 contacts with cross-bar 24.So when the user pushed away trip button downwards and tests, cross-bar rotated with the counter clockwise direction in scheming.
Thereby cross-bar 24 supports rotation on cutout housing 16 by hinge axis 34, and a spring 36 is arranged on the hinge axis 34, is used for providing to cross-bar 24 elastic force of a direction.In addition, cross-bar 24 comprises first working portion 38 at an upper portion thereof, is used to receive the bimetallic devices 8 crooked actuating forces that produce.Cross-bar 24 also comprises second working portion 50 of left part in the drawings, is used to receive the user and presses the actuating force that trip button 12 is produced; Right lock is thereon in the drawings for a firing device lock part 42, firing device 26; With the 3rd working portion 40 of bottom in the drawings, be used to receive actuating force from armature 10.
Just, cross-bar 24 during any actuating force, by around hinge axis 34 rotations, discharges the firing device in the lock-out state 26 in receiving from trip button 12, bimetallic devices 8 and armature 10.
In addition, a side of pusher dog 28 supports rotation by cutout housing 16, and the other side is locked on the firing device 26, also has a side lock driving lever 30.
An end of driving lever 30 is locked by pusher dog 28, and housing 16 supports a central shaft that penetrates driving lever top center part, and therefore, driving lever 30 can be around the central shaft rotation.In addition, when central shaft is connected to mobile contactor 18, place between connecting rod element 20 and the support when discharging the locking of pusher dog 28, driving lever 30 separates with fixed contact 2 mobile contactor 18 when rotated with fixed contact 4.
Introduce the work of the cutout of going up surface construction below.
When the user in order to know whether operate as normal of cutout, when pushing away trip button 12 downwards, trip button 12 promotes second working portion 50 of cross-baves 24, thus with the rotation of the counter clockwise direction in scheming cross-bar 24.When the lock-out state of firing device 26 was discharged by the rotation of cross-bar 24, firing device 26 rotated by counter clockwise direction under the elastic force effect of spring 48.At this moment, the lock-out state of pusher dog 28 is also discharged by the rotation of firing device 26, and pusher dog 28 is with rotation counterclockwise in scheming.In addition, when the lock-out state of driving lever 30 discharged according to the rotation of pusher dog 28, driving lever 30 also counterclockwise around the central shaft rotation, made switching mechanism 6 trip to circuit open position.
On the other hand, when surpassing rated current tens percent when the overcurrent of hundreds of is flowed through circuit, bimetallic devices 8 be heated and in figure left lateral bending, first working portion 38 of bump cross-bar 24.Therefore, when cross-bar 24 counterclockwise rotated, switching mechanism 6 jumped to circuit open position by triggering path same as described above.
On the other hand, when the predetermined instantaneous overcurrent that surpasses several times of rated current is flowed through circuit, armature 10 is pulled to bimetallic 8 under the magnetization of the coil that twines bimetallic devices 8, therefore, the 3rd working portion 40 of the upper part bump cross-bar 24 of armature 10 makes cross-bar 24 rotation counterclockwise.So switching mechanism 6 is by triggering path tripping operation same as described above.
As mentioned above, cross-bar 24 rotates under any actuating force effect in from trip button 12, bimetallic devices 8 and armature 10, makes switching mechanism 6 jump to circuit open position.
Circuit breaker of the present invention according to above-mentioned structure and work, trip button is installed as can rotate cross-bar, cross-bar rotates under one of following effect: the bimetallic devices of overcurrent work, the armature of instantaneous overcurrent work, trip button, in conjunction with other trip components, make switching mechanism jump to circuit open position.Therefore, the operate as normal of the element of formation trip device and the operate as normal of switching mechanism can be tested by pressing trip button.
Under the situation that does not break away from spirit of the present invention or substantive characteristics, the present invention may be embodied as various ways, should also be appreciated that, unless specify in addition, above embodiment is not limited to above-mentioned any details, and should explain broadly in the spirit and scope that claim limited that therefore, appended claim contains the changes and improvements in all boundaries that drop on claim or its equivalent.
Claims (3)
1. circuit breaker comprises:
Switching mechanism, it comprises a fixed contact that links to each other with power supply, a fixed contact that links to each other with electric loading, and one be installed between the fixed contact, can move to/from the position of fixed contact contact/separation, be used to connect and deenergization and load between the mobile contactor of circuit;
Bimetallic devices links to each other with the fixed contact that is connected load, is used for having produced when surpassing the overcurrent of an estimated rate of rated current at circuit, in the given time by the crooked power that provides;
Armature links to each other with the fixed contact that is connected power supply, is used for providing immediately when overcurrent surpasses several times of rated current actuating force;
Cross-bar rotates under the effect from the power of bimetallic devices or armature, is used for switching mechanism is jumped to circuit open position; With
Trip button, when the user in order to test whether operate as normal and when pressing it of cutout, the power that is provided for rotating cross-bar.
2. circuit breaker according to claim 1, wherein cross-bar supports rotation by Shell of circuit breaker, and cross-bar comprises:
First working portion is positioned at cross-bar top, is used for receiving actuating force from bimetallic devices;
Second working portion is used for receiving actuating force from trip button; With
The 3rd working portion is positioned at the cross-bar bottom, is used for receiving actuating force from armature.
3. circuit breaker according to claim 1, wherein the top of trip button is inserted in inserting in the hole on the housing upper surface in vertical direction movably, and the lower end of trip button can contact second working portion of cross-bar.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0017852A KR100451770B1 (en) | 2002-04-01 | 2002-04-01 | molded case circuit breaker |
| KR17852/2002 | 2002-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2715330Y true CN2715330Y (en) | 2005-08-03 |
Family
ID=32377467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU03238436XU Expired - Lifetime CN2715330Y (en) | 2002-04-01 | 2003-03-28 | Circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3096829U (en) |
| KR (1) | KR100451770B1 (en) |
| CN (1) | CN2715330Y (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101085267B1 (en) | 2010-06-07 | 2011-11-22 | 엘에스산전 주식회사 | Trip mechanism for current limiting type mold cased circuit breaker |
| KR200477247Y1 (en) * | 2011-06-24 | 2015-05-22 | 엘에스산전 주식회사 | Overcurrent control switch for curcuit breaker |
| JP6020236B2 (en) * | 2013-02-14 | 2016-11-02 | 富士電機機器制御株式会社 | Circuit breaker and circuit breaker assembly method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4603313A (en) * | 1985-08-30 | 1986-07-29 | Westinghouse Electric Corp. | Circuit breaker with replaceable rating plug interlock and push to trip button |
| JPH0554784A (en) * | 1991-08-22 | 1993-03-05 | Fuji Electric Co Ltd | Trip button device of circuit breaker |
| KR20000001452U (en) * | 1998-06-25 | 2000-01-25 | 이종수 | Device to check normal operation of wiring breaker |
| JP2000090807A (en) * | 1998-09-16 | 2000-03-31 | Fuji Electric Co Ltd | Circuit breaker |
| KR20020044660A (en) * | 2000-12-06 | 2002-06-19 | 이종수 | the earth leakage test device in leakage circuit breaker |
-
2002
- 2002-04-01 KR KR10-2002-0017852A patent/KR100451770B1/en not_active IP Right Cessation
-
2003
- 2003-03-28 CN CNU03238436XU patent/CN2715330Y/en not_active Expired - Lifetime
- 2003-04-01 JP JP2003001745U patent/JP3096829U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030079084A (en) | 2003-10-10 |
| JP3096829U (en) | 2004-01-08 |
| KR100451770B1 (en) | 2004-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130328 Granted publication date: 20050803 |