CN202888100U - Operating mechanism of residual current circuit breaker - Google Patents
Operating mechanism of residual current circuit breaker Download PDFInfo
- Publication number
- CN202888100U CN202888100U CN 201220602528 CN201220602528U CN202888100U CN 202888100 U CN202888100 U CN 202888100U CN 201220602528 CN201220602528 CN 201220602528 CN 201220602528 U CN201220602528 U CN 201220602528U CN 202888100 U CN202888100 U CN 202888100U
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- connecting rod
- tripping
- operating mechanism
- circuit breaker
- residual current
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Abstract
The utility model provides an operating mechanism of a residual current circuit breaker. The operating mechanism comprises a handle arranged in a rotating manner, a transmission mechanism, a buckling piece component, a tripping piece and a free tripping mechanism, wherein the transmission mechanism comprises a first connecting rod connected with the handle and a second connecting rod pivotally connected with the first connecting rod, and the second connecting rod is in transmission and connection with a moving contact; the buckling piece component comprises a buckling piece, a locking piece, a buckling spring and a locking spring; the tripping piece is used for driving the locking piece to move so as to separate the buckling piece from the locking piece; the free tripping mechanism can complete the motion of the moving contact when the handle does not rotate; the free tripping mechanism comprises a cam arranged in the rotating manner and a third connecting rod, wherein the convex part of the cam pushes against the buckling piece, one end of the third connecting rod is pivotally connected on the cam, and the other end of the third connecting rod is pivotally connected at the joint of the second connecting rod and the first connecting rod; and when the buckling piece is separated from the locking piece, the cam can drive the buckling piece to perform self-rotation, further drive the third connecting rod to move the second connecting rod and further drive the moving contact to move. The operating mechanism provided by the utility model has a simple structure and can realize a free tripping function without external force.
Description
Technical field
The utility model relates to a kind of residual current circuit breaker, particularly relates to a kind of operating mechanism of residual current circuit breaker.
Background technology
As everyone knows, in the terminal distribution of low-voltage distribution system, all need to install residual current circuit breaker, the direct contact of the person and electrical fire are protected.In practice, a large amount of residual current circuit breakers normally switches on and off electric current only can reach 40A, and few part can reach 63A, and when the rated current of field of employment surpassed 63A, the use of residual current circuit breaker will be met difficulty.Residual current circuit breaker in the reality use, part does not have the trip free function, the circuit breaker that part has the trip free function, but has the circuit breaker of trip free function when realizing the trip free function, need to operating mechanism be resetted by means of external force, complex structure and use inconvenience.
Chinese patent ZL200610049542 discloses a kind of operating mechanism of mini-type residual current actuated breaker, it comprises fixed contact, the driving mechanism of moving contact and moving contact, described driving mechanism comprises by operating grip, the first kinematic link; rocking arm; the quadric chain that the second kinematic link and strutting piece form and by snap close; tripping part; the trip gear that the first returning spring and the second returning spring form, and comprise that first arm of force of the striker that is controlled by the fault trip relay and length merge the push rod of second arm of force that is used for release less than matching with described snap close of first arm of force.Adopt this structure to realize that handle is when carrying out closed procedure, if handle all can make mechanism disconnect the initial position that the realization dynamic/static contact is returned to off-state after being in the fault trip device action of any position, effectively raise the reliability of residual current circuit breaker and the fail safe of use.But its mechanism is comparatively complicated, when realizing trip free each inter-agency cooperation comparatively strict, therefore when producing assembling, need strict design condition.
The utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of operating mechanism of residual current circuit breaker, being used for solving the prior art trip free need to be by external force, finish the complex structure of trip free function, the problem that the residual current of inapplicable large electric current disconnects.
Reach for achieving the above object other relevant purposes, the utility model provides a kind of operating mechanism of residual current circuit breaker, be used for driving moving contact action in the residual current circuit breaker, described operating mechanism comprises: the handle of rotary setting and transmission mechanism, transmission mechanism comprises the first connecting rod that links to each other with handle, and the second connecting rod that articulates with first connecting rod, second connecting rod links to each other with described moving contact transmission; Tripping part assembly comprises tripping part, snap close piece, tripping spring and latch spring, described tripping part and the mutual interlock of described snap close piece, and described tripping spring resets the tripping part, and described latch spring resets described snap close piece; The dropout part drives the motion of dropout part when residual current circuit breaker detects rated current, the dropout part drives described snap close piece motion makes the tripping part separate with snap close piece; Described operating mechanism also comprises free tripping mechanism, when not rotating, finishes by described handle the moving contact motion, free tripping mechanism comprises that one rotates cam and the third connecting rod that arranges, the protuberance of described cam is conflicted on described tripping part, described third connecting rod one end is articulated on the described cam, the other end of third connecting rod is articulated in the junction of described second connecting rod, first connecting rod, when the tripping part separates with snap close piece, described actuated by cams tripping part and then self rotation, and the drive third connecting rod orders about the second connecting rod motion and then drives described moving contact motion.
When the handle of the utility model in operating mechanism is in closing position and locks this position; when occurring residual current in the circuit and reach the rated value of circuit breaker; circuit breaker can be threaded off; the dropout part drives snap close piece to be separated with the tripping part; balance between tripping part, snap close piece and cam lost efficacy; cam self rotates and then drives third connecting rod, second connecting rod motion; second connecting rod drives the moving contact motion; thereby disconnection main circuit; realize defencive function; this moment, the moving contact of circuit breaker was to be in open position, and the operating mechanism handle is in closing position.Behind the cancellation handle locking, the handle capable of being self-return is to open position, and operating grip closes a floodgate again, and the operating mechanism of circuit breaker can normally be detained again, i.e. closed main circuit again.
Preferably, described cam, described snap close piece cooperate with the two ends of described tripping part respectively, and the three forms balanced lever.
Preferably, described first connecting rod is the U-shaped bar, and an end of U-shaped bar is plugged in the axis hole on the described handle, and the other end of U-shaped bar is as the rotation axis of described second connecting rod and third connecting rod.
Preferably, described operating mechanism also comprises attached assembly and the dropout lever that links to each other with described snap close piece transmission, described attached assembly is installed in described dropout lever place and links to each other with described dropout lever drive, and described attached assembly is the one or more combinations under voltage assembly, overvoltage assembly or the shunted exciter tripping assembly.
Preferably, described dropout lever drives described snap close piece motion by described dropout part, and dropout lever, dropout part all connect a back-moving spring.
Preferably, described operating mechanism also comprises alarm assemblies, and described alarm assemblies links to each other with a return unit transmission, and described return unit links to each other with described cam.
Preferably, described handle comprises rotation section and the grip part of holding for the user, and described rotation section is rotated and is arranged on the shell of described residual current circuit breaker, has an extension on the described rotation section, described grip part is provided with an open slot, and described extension is fastened in the described open slot.
Preferably, the groove inwall of described open slot is provided with two bayonet sockets of relative opening, and the opposite side of described extension is provided with lug, nib, and described lug, nib is fastened in the described bayonet socket.
As mentioned above, the operating mechanism of residual current circuit breaker of the present utility model, has following beneficial effect: adopt cam and third connecting rod and tripping part, the second connecting rod formation free tripping mechanism that cooperatively interacts, the parts of whole mechanism have been simplified in the utilization of cam, and the architectural characteristic of himself guaranteed the realization of trip free function, and simple in structure being easy to used; Operating mechanism of the present utility model can be set up other attached assemblies, such as under voltage assembly, overvoltage assembly or shunted exciter tripping assembly, and alarm assemblies, realize multi-functional combination; Operating mechanism of the present utility model can realize that the residual current of large current value disconnects, and disconnects the rated current maximum and can reach 125A; The structure that above-mentioned handle adopts the grip part to be combined with the rotation section, the grip part more meets Human Engineering Principle, rapid operation and comfortable.
Description of drawings
Fig. 1 is shown as the operating mechanism schematic diagram of residual current circuit breaker of the present utility model.
Fig. 2 is shown as handle "on" position figure in the described operating mechanism.
Fig. 3 is shown as handle "on" position rearview in the described operating mechanism.
Fig. 4 is shown as the state diagram of described operating mechanism trip free.
Fig. 5 is shown as the concrete structure figure of described handle.
The element numbers explanation
1 handle
2 tripping parts
3 cams
4 snap close pieces
5 return units
6 dropout levers
7 dropout parts
8 first connecting rods
9 third connecting rods
10 second connecting rods
11 left plates
12 right plates
13 latch springs
14 tripping springs
15 dropout springs
101 rotation sections
102 grip parts
103 open slots
104 extensions
Embodiment
Below by particular specific embodiment execution mode of the present utility model is described, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.
See also Fig. 1 to Fig. 5.Notice, the appended graphic structure that illustrates of this specification, ratio, size etc., equal contents in order to cooperate specification to disclose only, understand and reading for person skilled in the art scholar, be not to limit the enforceable qualifications of the utility model, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that the utility model can produce and the purpose that can reach, all should still drop on the technology contents that the utility model discloses and get in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under without essence change technology contents, when also being considered as the enforceable category of the utility model.
Such as Fig. 1 and shown in Figure 4, the utility model provides a kind of operating mechanism of residual current circuit breaker, is used for driving moving contact action in the residual current circuit breaker, and operating mechanism comprises: the shell that left plate 11 and right plate 12 consist of; Handle 1 and the transmission mechanism of rotary setting, transmission mechanism comprise the first connecting rod 8 that links to each other with handle 1, and the second connecting rod 10 that articulates with first connecting rod 8, and second connecting rod 10 links to each other with the moving contact transmission; Tripping part assembly comprises tripping part 2, snap close piece 4, tripping spring 14 and latch spring 13, tripping part 2 and snap close piece 4 mutual interlocks, and tripping spring 14 resets tripping part 2, and latch spring 13 resets snap close piece 4; Dropout part 7 drives 7 motions of dropout part when residual current circuit breaker detects rated current, dropout part 7 drives snap close piece 4 motions makes tripping part 2 separate with snap close piece 4; Also comprise free tripping mechanism, when not rotating, finishes by handle 1 the moving contact motion, free tripping mechanism comprises that one rotates cam 3 and the third connecting rod 9 that arranges, the protuberance of cam 3 is conflicted on tripping part 2, one end of third connecting rod 9 is articulated on the cam 3, the other end of third connecting rod 9 is articulated in the junction of second connecting rod 10, first connecting rod 8, when tripping part 2 separates with snap close piece 4, cam 3 drives tripping part 2 and then self rotation, and drive third connecting rod 9 orders about second connecting rod 10 motions and then drives the moving contact motion.
When the handle 1 of the utility model in operating mechanism is in closing position and locks this position; when occurring residual current in the circuit and reach the rated value of circuit breaker; circuit breaker can be threaded off; dropout part 7 drives snap close piece 4 to be separated with tripping part 2; the balance that tripping part 2, snap close piece 4 and cam are 3 lost efficacy; cam 3 self rotates and then drives third connecting rod 9, second connecting rod 10 motions; second connecting rod 10 drives the moving contact motion; thereby disconnection main circuit; realize defencive function; this moment, the moving contact of circuit breaker was to be in open position, and handle 1 is in closing position.1 motionless operating mechanism of handle is still finished contact and is disconnected, and need to by other external force, not realize the trip free function fully.Behind the cancellation handle locking, handle 1 can self-return to open position, operating grip 1 closes a floodgate again, the operating mechanism of circuit breaker can normally be detained again, i.e. closed main circuit again.
As shown in Figure 2 to Figure 3, the handle 1 of manual or electronic deciliter operating mechanism, handle 1 can drive first connecting rod 8 motions, first connecting rod 8 interacts with third connecting rod 9, thereby control second connecting rod 10 rotates, second connecting rod 10 is meshed with the moving contact of residual current circuit breaker, thereby the disconnection of control moving contact finally reaches the control main circuit and disconnects and closed purpose with closed.As shown in Figure 4, above-mentioned first connecting rod 8 is the U-shaped bar, one end of U-shaped bar is plugged in the axis hole on the handle 1, the other end of U-shaped bar is as the rotation axis of second connecting rod 10 and third connecting rod 9, one end of third connecting rod 9 and second connecting rod 10, first connecting rod 8 is three point gearing in the articulated section, the mutual balance of active force, the other end of third connecting rod 9 and cam 3 engagements, the protuberance of cam 3 is that the outer arcuate face matches with tripping part 2, thereby control the motion of tripping part 2 by the rotation of cam 3, the other end of tripping part 2 and snap close piece 4 interlocks, this optimal design by tripping part 2, can solve the circuit that normal deciliter electric current of second connecting rod 10 control movable contacts reaches 125A, and the operating characteristic of residual current circuit breaker operating mechanism keeps stable.
As shown in Figure 4, above-mentioned cam 3, snap close piece 4 cooperate with the two ends of tripping part 2 respectively, and the three forms balanced lever.In the present embodiment, with cam 3, the position that snap close piece 4 contacts with tripping part 2 is arranged on the both sides of handle 1, can increase like this tripping part as the length of lever, strengthen lever force, when residual current appears in the dropout part in circuit and reach the rated value of circuit breaker, move, driving snap close piece 4 separates with tripping part 2, at this moment lever balance is broken, cam 3 is broken with the balance of tripping part 2, cam 3 drives 2 motions of tripping part and self rotation, the growth of lever has increased the reagency of cam side, so the residual current that this free tripping mechanism makes this operating mechanism be applicable to large current value disconnects, and maximum rated current can reach 125A.
The course of work of this operating mechanism is: as shown in Figure 4; handle 1 is in closing position and locks this position; when occurring residual current in the circuit and reach the rated value of circuit breaker; circuit breaker can be threaded off; dropout part 7 drives snap close piece 4 and moves with the rotation direction of dropout part 7; when snap close piece 4 moves to when losing efficacy with 2 interlocks of tripping part; tripping part 2 will be in free state with the biting point of snap close piece 4; tripping part 2 can be under the drive of cam 3 and move; when cam 3 moves to correct position; third connecting rod 9 and second connecting rod 10; first connecting rod 8 triangular mutual balances are broken; first connecting rod 8 and second connecting rod 10 are in free state, thereby disconnecting main circuit, realize defencive function; this moment, the moving contact of circuit breaker was to be in open position, and handle 1 is in closing position.This moment cancel handle locking after, handle 1 under the active force of its back-moving spring self-return to open position.When handle 1 is returned to open position, be under the active force of back-moving spring etc. of tripping spring 14, latch spring 13, dropout part at each back-moving spring, dropout part 7, snap close piece 4, tripping part 2, cam 3 can be returned to original position successively, operating grip 1 closes a floodgate again, and the operating mechanism of circuit breaker can normally be detained (closed main circuit) again.
Further, the operating mechanism of residual current circuit breaker of the present utility model comprises a dropout lever 6 that links to each other with above-mentioned snap close piece 4 transmissions, utilize this this operating mechanism of dropout lever that other attached assemblies can also be installed, attached assembly is installed in dropout lever 6 places and links to each other with 6 transmissions of dropout lever, attached assembly is the under voltage assembly, one or more combinations in overvoltage assembly or the shunted exciter tripping assembly, above-mentioned dropout lever 6 can drive snap close piece 4 motions by above-mentioned dropout part 7, dropout lever 6, dropout part 7 all connects a back-moving spring, and the back-moving spring that dropout lever 6 connects is the dropout spring 15 among Fig. 3.This operating mechanism also can comprise alarm assemblies, and alarm assemblies links to each other with a return unit 5 transmissions, and return unit 5 links to each other with cam 3.When each attached assembly of residual current circuit breaker assembly unit, the action bars of corresponding attached assembly should be in the dropout lever 6 of operating mechanism, the position (as shown in Figure 3) in the middle of the return unit 5, when assembly unit under voltage assembly, overvoltage assembly and shunted exciter tripping assembly, the action bars of each attached assembly acts on the dropout lever 6 of operating mechanism, the rotation of dropout lever 6 can promote snap close piece 4 motions, afterwards the motion path of each element of operating mechanism as mentioned above, thereby reach control main circuit purpose.When the assembly unit alarm assemblies, because cam 3 passes through rivet and fit with return unit 5, rotation along with cam 3, can drive the rotary motion trace of return unit 5 rivet hole on the cam 3 and move, the motion of return unit 5 will promote the action bars of alarm assemblies, when circuit breaker once divided closing operation to main circuit, the cam 3 of operating mechanism will rotate once, thereby realized assembly unit alarm assemblies function.
For ease of operating personnel's use, above-mentioned handle is comprised of two parts.As shown in Figure 5, handle 1 comprises rotation section 101 and the grip part 102 of holding for the user, rotation section 101 is rotated on the shell that is arranged on residual current circuit breaker and namely is supported between left plate, right plate, has an extension 104 on the rotation section 101, grip part 102 is provided with an open slot 103, and extension 104 is fastened in the open slot 103.The groove inwall of open slot 103 is provided with two bayonet sockets of relative opening, and the opposite side of extension 104 is provided with lug, nib, and lug, nib is fastened in the described bayonet socket.By direction as shown grip part 102 is pushed rotation section 101, open slot matches with lug, nib, and it has guaranteed that the grip part can push the rotation section easily, and can not be easily with its taking-up, and the grip part meets Human Engineering Principle, rapid operation and comfortable.
In sum, the operating mechanism of residual current circuit breaker of the present utility model, adopt cam and third connecting rod and tripping part, the second connecting rod formation free tripping mechanism that cooperatively interacts, the parts of whole mechanism have been simplified in the utilization of cam, and the architectural characteristic of himself guaranteed the realization of trip free function, and simple in structure being easy to used; Operating mechanism of the present utility model can be set up other attached assemblies, such as under voltage assembly, overvoltage assembly or shunted exciter tripping assembly, and alarm assemblies, realize multi-functional combination; Operating mechanism of the present utility model can realize that the residual current of large current value disconnects, and disconnects the rated current maximum and can reach 125A; The structure that above-mentioned handle adopts the grip part to be combined with the rotation section, the grip part more meets Human Engineering Principle, rapid operation and comfortable.So the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not is used for restriction the utility model.Any person skilled in the art scholar all can be under spirit of the present utility model and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under spirit that the utility model discloses and the technological thought, must be contained by claim of the present utility model.
Claims (8)
1. the operating mechanism of a residual current circuit breaker, be used for driving moving contact action in the residual current circuit breaker, described operating mechanism comprises: the handle of rotary setting (1) and transmission mechanism, transmission mechanism comprises the first connecting rod (8) that links to each other with handle (1), and the second connecting rod (10) that articulates with first connecting rod (8), second connecting rod (10) links to each other with described moving contact transmission; Tripping part assembly, comprise tripping part (2), snap close piece (4), tripping spring (14) and latch spring (13), described tripping part (2) and mutually interlock of described snap close piece (4), described tripping spring (14) resets tripping part (2), and described latch spring (13) resets described snap close piece (4);
Dropout part (7) drives dropout part (7) motion when residual current circuit breaker detects rated current, dropout part (7) drives described snap close piece (3) motion makes tripping part (2) separate with snap close piece (4); It is characterized in that,
Described operating mechanism also comprises free tripping mechanism, finish the moving contact motion when not rotating at described handle (1), free tripping mechanism comprises that one rotates cam (3) and the third connecting rod (9) that arranges, the protuberance of described cam (3) is conflicted on described tripping part (2), described third connecting rod (9) one ends are articulated on the described cam (3), the other end of third connecting rod (9) is articulated in described second connecting rod (10), the junction of first connecting rod (8), at tripping part (2) and snap close piece (4) when separating, described cam (3) drives tripping part (2) and then self rotation, and drives third connecting rod (9) and order about second connecting rod (10) and move and then drive described moving contact motion.
2. the operating mechanism of residual current circuit breaker according to claim 1, it is characterized in that: described cam (3), described snap close piece (4) cooperate with the two ends of described tripping part (2) respectively, and the three forms balanced lever.
3. the operating mechanism of residual current circuit breaker according to claim 1, it is characterized in that: described first connecting rod (8) is the U-shaped bar, one end of U-shaped bar is plugged in the axis hole on the described handle (1), and the other end of U-shaped bar is as the rotation axis of described second connecting rod (10) and third connecting rod (9).
4. the operating mechanism of residual current circuit breaker according to claim 1, it is characterized in that: described operating mechanism also comprises attached assembly and the dropout lever (6) that links to each other with described snap close piece (3) transmission, described attached assembly is installed in that described dropout lever (6) is located and links to each other with described dropout lever (6) transmission, and described attached assembly is the one or more combinations under voltage assembly, overvoltage assembly or the shunted exciter tripping assembly.
5. the operating mechanism of residual current circuit breaker according to claim 4, it is characterized in that: described dropout lever (6) drives described snap close piece (4) motion by described dropout part (7), and described dropout lever (6), dropout part (7) all connect a back-moving spring
6. the operating mechanism of residual current circuit breaker according to claim 1, it is characterized in that: described operating mechanism also comprises alarm assemblies, and described alarm assemblies links to each other with a return unit (5) transmission, and described return unit (5) links to each other with described cam (3).
7. the operating mechanism of residual current circuit breaker according to claim 1, it is characterized in that: described handle (1) comprises rotation section (101) and the grip part (102) of holding for the user, described rotation section (101) is rotated and is arranged on the shell of described residual current circuit breaker, has an extension (104) on the described rotation section (101), described grip part (102) is provided with an open slot (103), and described extension (104) is fastened in the described open slot (103).
8. the operating mechanism of residual current circuit breaker according to claim 7, it is characterized in that: the groove inwall of described open slot (103) is provided with two bayonet sockets of relative opening, the opposite side of described extension (104) is provided with lug, nib, and described lug, nib is fastened in the described bayonet socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602528 CN202888100U (en) | 2012-11-14 | 2012-11-14 | Operating mechanism of residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602528 CN202888100U (en) | 2012-11-14 | 2012-11-14 | Operating mechanism of residual current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
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| CN202888100U true CN202888100U (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220602528 Expired - Lifetime CN202888100U (en) | 2012-11-14 | 2012-11-14 | Operating mechanism of residual current circuit breaker |
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| CN (1) | CN202888100U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811234A (en) * | 2012-11-14 | 2014-05-21 | 三信国际电器上海有限公司 | After-current circuit breaker operation mechanism |
| CN104157523A (en) * | 2014-06-30 | 2014-11-19 | 浙江天正智能电器有限公司 | Breaker with handle locking function |
| CN106971920A (en) * | 2016-01-14 | 2017-07-21 | 三信国际电器上海有限公司 | The actuating mechanism that residual current action breaker is used |
| CN109390189A (en) * | 2017-08-03 | 2019-02-26 | 乐星产电(无锡)有限公司 | Trip gear |
-
2012
- 2012-11-14 CN CN 201220602528 patent/CN202888100U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811234A (en) * | 2012-11-14 | 2014-05-21 | 三信国际电器上海有限公司 | After-current circuit breaker operation mechanism |
| CN103811234B (en) * | 2012-11-14 | 2016-08-03 | 三信国际电器上海有限公司 | The operating mechanism of residual current circuit breaker |
| CN104157523A (en) * | 2014-06-30 | 2014-11-19 | 浙江天正智能电器有限公司 | Breaker with handle locking function |
| CN106971920A (en) * | 2016-01-14 | 2017-07-21 | 三信国际电器上海有限公司 | The actuating mechanism that residual current action breaker is used |
| CN106971920B (en) * | 2016-01-14 | 2019-09-10 | 三信国际电器上海有限公司 | The actuating mechanism that residual current action breaker uses |
| CN109390189A (en) * | 2017-08-03 | 2019-02-26 | 乐星产电(无锡)有限公司 | Trip gear |
| CN109390189B (en) * | 2017-08-03 | 2020-08-14 | 乐星电气(无锡)有限公司 | Tripping device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
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| CX01 | Expiry of patent term |