CN107424879B - Residual current tripping mechanism and circuit breaker - Google Patents
Residual current tripping mechanism and circuit breaker Download PDFInfo
- Publication number
- CN107424879B CN107424879B CN201710462871.9A CN201710462871A CN107424879B CN 107424879 B CN107424879 B CN 107424879B CN 201710462871 A CN201710462871 A CN 201710462871A CN 107424879 B CN107424879 B CN 107424879B
- Authority
- CN
- China
- Prior art keywords
- trip
- tripping
- circuit breaker
- rod
- buckle
- 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.)
- Active
Links
Images
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
- H01H71/12—Automatic release mechanisms with or without manual release
-
- 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
-
- 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
- H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage
Landscapes
- Breakers (AREA)
Abstract
The invention discloses a residual current tripping mechanism and a circuit breaker, wherein the residual current tripping mechanism comprises a shell, a tripping rod, a lock catch and a driving piece, the tripping rod is fixedly pivoted on the shell and can rotate around a pivoting part, one end of the tripping rod is hinged with one end of the tripping rod to form an eccentric positioning point of the tripping, the other end of the tripping rod is an engaging end, the tripping rod is connected with the driving piece to provide power support, the engaging end of the tripping rod is matched with the lock catch, the lock catch is arranged on the shell and can rotate to be engaged with or separated from the tripping rod, the tripping rod does eccentric motion in a free tripping process, and the eccentric positioning point of the tripping rod moves along an arc-shaped track taking the pivoting part of the tripping rod as a center. The invention sets the jump buckle to be in an unfixed eccentric action mode, thereby having the advantages of labor saving in tripping, safe and reliable residual current protection and the like.
Description
Technical Field
The invention discloses a residual current tripping mechanism and a circuit breaker, belongs to the technical field of circuit breaker manufacturing according to the International Patent Classification (IPC) division, and particularly relates to a residual current tripping mechanism and a multifunctional circuit breaker structure formed by combining the same.
Background
When the existing residual current circuit breaker is tripped, the tripping piece usually rotates by taking a fixed point as an axis to trigger the related connecting piece to trip, the structure is relatively complex, and the cooperation among mechanisms is strict when free tripping is realized.
Chinese document CN 103811234a provides a residual current circuit breaker, which realizes residual current protection by matching an operating mechanism with a trip fastener assembly and a free trip mechanism, but all components are assembled in the same housing, and the circuit breaker unit has an internal structure and a residual current protection function; in addition, in the above scheme, the tripping element in the tripping element assembly rotates by the fixed shaft, and the tripping element, the cam and the third connecting rod act to drive the second connecting rod to move so as to drive the moving contact to move. Chinese document C1808665 a discloses an operating mechanism of a small residual current operated circuit breaker, in which a jumper button is also rotated by a fixed shaft to be unlocked by the action of a related member, but the structure is complex and is not suitable for overcurrent and leakage double protection.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a residual current tripping mechanism which is used as a functional accessory to be matched with a circuit breaker body to realize leakage fault protection.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a residual current tripping mechanism comprises a shell, a tripping rod, a lock catch and a driving piece, wherein the tripping rod is fixedly pivoted on the shell and can rotate around a pivoting part, one end of the tripping rod is hinged with one end of the tripping rod to form an eccentric positioning point of the tripping, the other end of the tripping rod is an engaging end, the tripping rod is connected with the driving piece to provide power support, the engaging end of the tripping rod is matched with the lock catch, the lock catch is installed on the shell and can rotate to be engaged with or separated from the tripping rod, the tripping rod does eccentric motion in a free tripping process, and the eccentric positioning point of the tripping rod moves along an arc-shaped track taking the pivoting part of the tripping rod as a center.
Furthermore, the trip bar comprises a first working arm and a second working arm, wherein the first working arm is hinged to the jump buckle, the trip bar is matched with a spring to provide counter force to keep balance with the jump buckle, and the second working arm of the trip bar acts on the lock catch lever to trigger the circuit breaker to trip through the lock catch lever.
Further, the trip bar has an open position and a closed position, and the second working arm of the trip bar is spaced apart from the latch lever in the closed position, and the second working arm is higher than the latch lever.
Further, hasp one end has the interlock end of locked groove in order to mesh jump buckle, the hasp other end with reset the board effect, reset the board and install on the casing and can swing around the installation department, reset board one side and be equipped with the release, the release has a push rod, during the electric leakage trouble, the release push rod promotes the swing of reset board, the board that resets promotes the hasp anticlockwise rotation and makes hasp and jump buckle unblock.
Furthermore, the jump buckle is connected with the electric leakage indicating handle through the connecting rod piece, the stress balance state of the jump buckle disappears when the electric leakage indicating handle is disconnected, the force of the jump buckle on the trip rod disappears, and the trip rod returns to the disconnection position under the action of the spring force to push the lock catch lever to trip the circuit breaker.
Furthermore, a driving point is arranged at the joint of the jump buckle and the driving piece, a first force arm is arranged between the driving point of the jump buckle and the jump buckle eccentric positioning point, a second force arm is arranged between the driving point of the jump buckle and the engagement end, and the second force arm of the jump buckle is larger than the first force arm to form a labor-saving lever structure.
The invention also provides a circuit breaker, which comprises a circuit breaker unit and an electric leakage protection accessory unit, wherein the electric leakage protection accessory unit comprises the residual current tripping mechanism, and the electric leakage protection accessory unit enables a circuit in the circuit breaker unit to be disconnected through a tripping lever.
Further, be equipped with the circuit breaker handle on the circuit breaker unit, be equipped with electric leakage indicating handle on the earth leakage protection annex unit, include overcurrent protection device in the circuit breaker unit: when overcurrent occurs, the handle of the circuit breaker is disconnected, and the electric leakage indicating handle is kept unchanged; when the leakage fault is protected, the leakage indicating handle and the breaker handle are disconnected simultaneously.
The jump buckle is arranged in an unfixed eccentric action mode, and the jump buckle is different from a fixed point rotation mode of the jump buckle in the existing circuit breaker.
Drawings
FIG. 1 is a schematic illustration of an open position in accordance with an embodiment of the present invention.
FIG. 2 is a schematic illustration of a closed position of an embodiment of the present invention.
Fig. 3 is a schematic diagram of a trip free position according to an embodiment of the present invention.
Figure 4 is a schematic diagram of the circuit breaker of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
example (b): referring to fig. 1 to 4, a residual current trip mechanism includes a housing 1, and a trip bar 2, a trip rod 3, a latch 4 and a driving member 5 in the housing, wherein the trip bar 3 is fixedly pivoted on the housing 1 and can rotate around a pivot joint, one end of the trip bar 3 is hinged with one end of the trip bar 2 to form an eccentric positioning point 201 of the trip bar, the other end of the trip bar 2 is an engagement end, the trip bar 2 is connected with the driving member 5 to provide power support, the engagement end of the trip bar 2 is matched with the latch 4, the latch 4 is mounted on the housing 1 and can rotate to engage with or disengage from the trip bar 2, the trip bar 2 performs eccentric motion in a free trip process, the eccentric positioning point 201 of the trip bar 2 moves along an arc-shaped track with the pivot joint of the trip bar 3 as a center, and a positioning shaft of the trip bar at the trip bar is 20. The trip bar 3 comprises a first working arm (behind the jump buckle) and a second working arm 31, wherein the first working arm is hinged with the jump buckle, a spring is matched on the trip bar 3 to provide counter force to keep balance with the jump buckle, and the second working arm 31 of the trip bar 3 acts with a lock catch lever 6 to trigger the circuit breaker to trip through the lock catch lever. The tripping rod 3 is arranged on the shell 1 through a positioning shaft, the first working arm and the second working arm have a certain opening angle, and the second working arm is provided with an arc-shaped crimping part matched with the tripping lever (the tripping shaft). The trip bar 3 has an open position and a closed position, in which the second operating arm 31 of the trip bar 3 is spaced apart from the latch lever 6 with a distance, in which the second operating arm 31 is higher than the latch lever 6. One end of a lock catch 4 is provided with a lock groove to be engaged with an engagement end of a jump buckle 2, the other end of the lock catch 4 acts with a reset plate 7, an engagement point M of the lock catch and the reset plate is shown in fig. 3, the reset plate 7 is installed on a shell through a positioning shaft 71 and can swing around an installation position, one side of the reset plate 7 is provided with a release 8, the release 8 is fixed on the shell, the release 8 is provided with a push rod 81, when an electric leakage fault occurs, the release push rod 81 pushes the reset plate 7 to swing, and the reset plate 7 pushes the lock catch 4 to rotate anticlockwise so that the lock catch 4 is unlocked with the jump buckle 2. The tripper of the invention can be an electronic type or an electromagnetic type tripper and can be universal, which is related to the layout of mechanisms in the shell.
Referring to fig. 1, 2 and 3, the trip buckle 2 of the present invention is connected to the leakage indicating handle 52 through the link rod 51, the link rod 51 and the leakage indicating handle 52 form the driving member 5, when the leakage indicating handle 52 is disconnected, the stress balance state of the trip buckle 2 disappears, the force of the trip buckle 2 acting on the trip bar 3 disappears, and the trip bar 3 returns to the disconnected position under the action of the spring force to push the latch lever 6 to trip the circuit breaker. The connecting rod piece 51 of the invention can be a U-shaped bolt, a U-shaped rod or other connecting rods, one end of the connecting rod piece 51 is connected with the leakage indicating handle 52, and the other end is connected with the jump buckle 2. The connection part of the jump buckle 2 and the driving part, namely the U-shaped rod is a driving point, a first force arm 21 is arranged between the driving point of the jump buckle and the jump buckle eccentric positioning point, a second force arm 22 is arranged between the driving point of the jump buckle and the occlusion end, and the second force arm of the jump buckle is larger than the first force arm to form a labor-saving lever structure.
According to the invention, the jump buckle is set to be in an unfixed eccentric action mode, and in the free tripping process, the jump buckle, the tripping rod and the lock catch are in a dynamic system, so that the tripping is labor-saving, and the residual current protection is safe and reliable.
As shown in fig. 1, when the leakage indicating handle 52 is opened, the trip bar 3 is kept downward and presses the trip lever (i.e., the trip shaft of the MCB), ensuring that the circuit breaker MCB is in an open state.
As shown in fig. 2, when the leakage indicating handle 52 is closed, the latch 4 is engaged with one end of the trip lever 2, and the other end of the trip lever pushes the trip bar 3 to move counterclockwise, so that the trip bar 3 is separated from the trip lever 6 (i.e., the trip shaft of the MCB).
The invention works as follows:
1. when the electric leakage indicating handle is manually disconnected
The stress balance state of the jump buckle disappears, the force of the trip rod under the action of the jump buckle disappears, the trip rod returns to the off position under the action of the spring force, and the trip lever (MCB trip shaft) is pushed to disconnect the MCB of the circuit breaker.
2. Reset plate
When the release RCD is released, the push rod pushes the reset plate, and the reset plate impacts the lock catch to unlock the lock catch.
3. When leakage fault occurs
The tripper acts, a tripper push rod can push a reset plate to rotate anticlockwise around a positioning shaft, so that the lock catch is pushed to rotate anticlockwise to be separated from a jump buckle meshing point, the trip rod returns to a breaking position, and the trip lever is pressed down to cut off a circuit of the circuit breaker.
In the invention, when the tripping stroke is less than the push rod stroke, the trip is reliable and the trip is in the maximum thrust interval;
reliable tripping when the required tripping force is less than the pushing force
The positioning mode of the jump buckle is the key point of protection:
the jump buckle is an eccentric mode in the whole moving process, and the positioning shaft of the jump buckle is moved rather than fixed.
As shown in fig. 3, the push rod of the release acts on the reset plate leftwards, the reset push lock catch rotates anticlockwise to unlock the lock catch and the jump catch, the jump catch is in a free state, and the trip rod rotates clockwise under the action of spring force to disconnect the circuit breaker.
Referring to fig. 4, the present invention further provides a circuit breaker a, including a circuit breaker unit and an electric leakage protection accessory unit, where the electric leakage protection accessory unit includes the residual current tripping mechanism, and the electric leakage protection accessory unit disconnects a circuit in the circuit breaker unit through a tripping lever 6 (inside the device, shown in fig. 1 to 3). Be equipped with circuit breaker handle 10 on the circuit breaker unit, be equipped with electric leakage indication handle 52 on the earth leakage protection annex unit, include overcurrent protection device in the circuit breaker unit: when overcurrent occurs, the breaker handle 10 is disconnected, and the leakage indicating handle 52 is kept unchanged; when earth leakage fault protection is performed, the earth leakage indicating handle 52 and the breaker handle 10 are simultaneously turned off. The breaker handle and the leakage indicating handle are related as follows:
when the first manual closing is carried out, the electric leakage indicating handle is driven to close, and the front part of the first manual closing is contacted with the electric leakage indicating handle, so that the electric leakage indicating handle is driven to close when the first manual closing is carried out;
when the electric leakage indicating handle is closed, the handle of the circuit breaker is kept unchanged;
when the breaker handle is disconnected, the electric leakage indicating handle is kept at a closed position;
when the electric leakage indicating handle is disconnected, the circuit breaker handle is driven to be disconnected simultaneously;
when overcurrent occurs, the handle of the circuit breaker is disconnected, and the electric leakage indicating handle is kept unchanged;
when the residual current is protected, the circuit breaker handle and the electric leakage indicating handle are disconnected simultaneously.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (8)
1. The utility model provides a residual current tripping device which characterized in that: the trip buckle is fixedly pivoted on the shell and can rotate around a pivoting position, one end of the trip rod is hinged with one end of the trip buckle to form an eccentric positioning point of the trip buckle, the other end of the trip buckle is an engagement end, the trip buckle is connected with the driving piece to provide power support, the engagement end of the trip buckle is matched with the lock catch, the lock catch is installed on the shell and can rotate to be engaged with or separated from the trip buckle, the trip buckle does eccentric motion in a free tripping process, and the eccentric positioning point of the trip buckle moves along an arc-shaped track taking the pivoting position of the trip rod as a center.
2. A residual current trip mechanism according to claim 1, wherein: the tripping rod comprises a first working arm and a second working arm, wherein the first working arm is hinged with the jump buckle, a spring is further matched on the tripping rod to provide counter force to keep balance with the jump buckle, and the second working arm of the tripping rod acts on the lock catch lever to trigger the circuit breaker to trip through the lock catch lever.
3. A residual current trip mechanism according to claim 2, wherein: the trip bar has an open position and a closed position in which the second working arm of the trip bar is spaced apart from the latch lever, the second working arm being higher than the latch lever.
4. A residual current trip mechanism according to claim 1, wherein: the utility model discloses a power leakage protection device, including casing, hasp, reset plate, tripper push rod, hasp one end has the interlock end that the locked groove was buckled with the meshing jump, the hasp other end with reset the board effect, reset the board and install on the casing and can swing around the installation department, reset board one side and be equipped with the release, the release has a push rod, during the electric leakage trouble, the release push rod promotes the swing of the board that resets, the board that resets promotes the hasp anticlockwise rotation and makes hasp and jump.
5. A residual current trip mechanism according to claim 1, wherein: the tripping device is connected with the electric leakage indicating handle through the connecting rod piece, when the electric leakage indicating handle is disconnected, the stress balance state of the tripping device disappears, the force of the tripping device on the tripping rod disappears, and the tripping rod returns to the disconnection position under the action of the spring force to push the locking lever to trip the circuit breaker.
6. A residual current trip mechanism according to claim 1, wherein: the connection part of the jump buckle and the driving piece is a driving point, a first force arm is arranged between the driving point of the jump buckle and the jump buckle eccentric positioning point, a second force arm is arranged between the driving point of the jump buckle and the engagement end, and the second force arm of the jump buckle is larger than the first force arm to form a labor-saving lever structure.
7. A circuit breaker, characterized by: comprising a circuit breaker unit and an earth leakage protection accessory unit comprising a residual current trip mechanism as claimed in any one of claims 1 to 6, the earth leakage protection accessory unit breaking the circuit in the circuit breaker unit by means of a trip lever.
8. A circuit breaker according to claim 7, wherein: be equipped with the circuit breaker handle on the circuit breaker unit, be equipped with electric leakage indication handle on the earth leakage protection annex unit, include overcurrent protection device in the circuit breaker unit: when overcurrent occurs, the handle of the circuit breaker is disconnected, and the electric leakage indicating handle is kept unchanged; when the leakage fault is protected, the leakage indicating handle and the breaker handle are disconnected simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462871.9A CN107424879B (en) | 2017-06-19 | 2017-06-19 | Residual current tripping mechanism and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462871.9A CN107424879B (en) | 2017-06-19 | 2017-06-19 | Residual current tripping mechanism and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107424879A CN107424879A (en) | 2017-12-01 |
| CN107424879B true CN107424879B (en) | 2020-06-12 |
Family
ID=60428816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710462871.9A Active CN107424879B (en) | 2017-06-19 | 2017-06-19 | Residual current tripping mechanism and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107424879B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899256B (en) * | 2018-07-27 | 2024-02-23 | 高能格乐电气股份有限公司 | Leakage tripping device of universal two circuit breakers |
| CN109545630B (en) * | 2018-11-16 | 2020-06-02 | 公牛集团股份有限公司 | Operating device, circuit breaker annex and combination formula circuit breaker of circuit breaker annex |
| CN113257630A (en) * | 2020-02-10 | 2021-08-13 | 西门子股份公司 | Circuit breaker accessory and circuit breaker assembly |
| CN111640628B (en) * | 2020-05-21 | 2022-07-12 | 温州金旭电气有限公司 | Miniature residual current circuit breaker |
| CN114005710A (en) * | 2020-07-28 | 2022-02-01 | 西门子股份公司 | Electric leakage fault indication mechanism of circuit breaker and circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130274A (en) * | 1993-10-29 | 1995-05-19 | Toshiba Lighting & Technol Corp | Circuit breaker |
| CN103928270A (en) * | 2013-12-31 | 2014-07-16 | 上海诺雅克电气有限公司 | Operation mechanism of small breaker |
| CN204991625U (en) * | 2015-10-21 | 2016-01-20 | 佳一电气有限公司 | Miniature circuit breaker controlling means separating brake structure |
| CN206774474U (en) * | 2017-06-19 | 2017-12-19 | 厦门宏发开关设备有限公司 | A kind of residual current tripping mechanism and breaker |
-
2017
- 2017-06-19 CN CN201710462871.9A patent/CN107424879B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130274A (en) * | 1993-10-29 | 1995-05-19 | Toshiba Lighting & Technol Corp | Circuit breaker |
| CN103928270A (en) * | 2013-12-31 | 2014-07-16 | 上海诺雅克电气有限公司 | Operation mechanism of small breaker |
| CN204991625U (en) * | 2015-10-21 | 2016-01-20 | 佳一电气有限公司 | Miniature circuit breaker controlling means separating brake structure |
| CN206774474U (en) * | 2017-06-19 | 2017-12-19 | 厦门宏发开关设备有限公司 | A kind of residual current tripping mechanism and breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107424879A (en) | 2017-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107424879B (en) | Residual current tripping mechanism and circuit breaker | |
| CN109950103B (en) | Circuit breaker operating mechanism and circuit breaker | |
| CN114220697B (en) | Isolating switch mechanism pole locking and unlocking mechanism | |
| EP2472547B1 (en) | Locking device for use with a circuit breaker and method of assembly | |
| CN108470657B (en) | Three-station mechanism of combined electrical apparatus | |
| JP4867644B2 (en) | External circuit handle device for circuit breaker | |
| CN201256130Y (en) | Improved circuit breaker | |
| CN206774474U (en) | A kind of residual current tripping mechanism and breaker | |
| CN108565185B (en) | Leakage indication protection mechanism and leakage indication protection method of leakage circuit breaker | |
| CN115472471A (en) | Circuit breaker and combined switch electrical apparatus | |
| CN111613479B (en) | Novel five-prevention locking method | |
| CN113823535A (en) | Intelligent miniature circuit breaker | |
| CN115602502A (en) | Circuit breaker tripping structure | |
| CN107293455B (en) | Tripping mechanism of permanent magnet circuit breaker, permanent magnet circuit breaker and switch cabinet | |
| CN109509689B (en) | Operating mechanism of switch electric appliance | |
| CN219759497U (en) | Locking structure of breaker operating mechanism | |
| CN219163307U (en) | Tripping mechanism of circuit breaker and circuit breaker | |
| CN216902654U (en) | Tripping device and isolating switch | |
| CN216528688U (en) | Limiting structure of lever in circuit breaker operating mechanism | |
| CN218568760U (en) | Circuit breaker and combined switch electrical apparatus | |
| CN217114283U (en) | Locking assembly of electric operating mechanism of circuit breaker | |
| WO2017167090A1 (en) | Auxiliary means for operating mechanism | |
| CN215988633U (en) | Intelligent miniature circuit breaker control system | |
| CN215644205U (en) | Interlock, circuit breaker subassembly and cubical switchboard | |
| CN220543776U (en) | Mechanical interlocking mechanism for grounding knife of rear door of switch cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |