CN114883154A - Leakage protection unit and residual current protection circuit breaker - Google Patents
Leakage protection unit and residual current protection circuit breaker Download PDFInfo
- Publication number
- CN114883154A CN114883154A CN202210590003.XA CN202210590003A CN114883154A CN 114883154 A CN114883154 A CN 114883154A CN 202210590003 A CN202210590003 A CN 202210590003A CN 114883154 A CN114883154 A CN 114883154A
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- Prior art keywords
- protection unit
- tripping
- handle
- residual current
- lock catch
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- 238000003756 stirring Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 230000009191 jumping Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 abstract description 25
- 230000009471 action Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/128—Manual release or trip mechanisms, e.g. for test purposes
-
- 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 relates to an electric leakage protection unit and a residual current protection circuit breaker, which comprise a base, a handle, a tripping mechanism and a first electromagnetic tripping device, wherein the handle, the tripping mechanism and the first electromagnetic tripping device are arranged in the base, the handle and the first electromagnetic tripping device are in linkage connection with the tripping mechanism to respectively drive manual switching-on and tripping-off of the tripping mechanism, and a resetting plate and a lock catch in the tripping mechanism share a pivot shaft, so that when the resetting plate rotates to unlock the lock catch, the pushing action point of the resetting plate on the lock catch cannot deviate, the unlocking of a locking part and a locked part cannot mutually slide, and the stability of tripping force and the reliability of a tripping process are further improved.
Description
Technical Field
The invention relates to the technical field of circuit breaker manufacturing, in particular to a residual current protection circuit breaker, and particularly relates to improvement of a leakage protection unit.
Background
The residual current protection circuit breaker generally comprises a circuit breaker unit and an electric leakage protection unit, wherein the circuit breaker unit is used for realizing the on-off of a loop and the overload and short-circuit protection of the loop, the circuit breaker mechanism is pushed to open a brake through the action of a thermal tripping mechanism and an electromagnetic mechanism, the electric leakage protection unit is used for detecting the leakage current in the loop through a zero sequence current transformer, then the setting of a control circuit board is carried out, the control circuit board outputs voltage to push out a tripper push rod in the electric leakage protection unit (induced electromotive force induced by the zero sequence current transformer is output to the tripper), so that the tripping mechanism of the electric leakage protection unit is pushed to operate, and finally the circuit breaker unit is opened, and a circuit is protected.
The applicant proposes in patent CN107424879A a leakage protection unit in which the tripping action is an eccentric action with no fixed point, and improves the tripping action process, so that the tripping is more labor-saving, and the leakage protection unit has safe and reliable functions. However, in subsequent research and development, it is found that in the tripping process of the product, the action point of the reset plate on the pushing force of the lock catch is easy to deviate, so that the tripping force is easy to change, and the tripping force is unstable.
Disclosure of Invention
Therefore, in order to solve the above problems, the present invention provides an earth leakage protection unit with an optimized structure, and further provides a residual current protection circuit breaker with the earth leakage protection unit.
The invention is realized by adopting the following technical scheme:
the invention provides a leakage protection unit, which comprises a base, a handle, a tripping mechanism and a first electromagnetic tripping device, wherein the handle, the tripping mechanism and the first electromagnetic tripping device are arranged in the base and are in linkage connection with the tripping mechanism so as to respectively drive a manual switching-on and switching-off of the tripping mechanism and a tripping and switching-off of the tripping mechanism, the tripping mechanism comprises a tripping rod, a jump buckle, a lock catch and a resetting plate, the handle, the tripping rod, the lock catch and the resetting plate are rotatably and pivotally connected to the base, the lock catch and the resetting plate share a pivoting shaft, the jump buckle is pivotally connected with the tripping rod, the handle is in linkage connection with the jump buckle, the lock catch is provided with a locking part, the jump buckle is also provided with a locked part which can be matched with the lock catch of the locking part, the resetting plate is arranged on one side of the first electromagnetic tripping device so as to receive the pushing of an output rod of the first electromagnetic tripping device, thereby toggling the latch to release the latch fit.
Preferably, the locking portion and the locked portion are formed in a J-shaped hook structure that can be hooked to each other.
Wherein, preferred earth leakage protection unit still includes first elastic component, first elastic component one end acts on the base, the other end acts on reset the board to rely on its elastic force to keep reset the contact of board and the output lever of first electromagnetism release, and realize the rotation of reset the board and reset.
The leakage protection unit preferably further comprises a second elastic piece and a third elastic piece, one end of the second elastic piece acts on the base, and the other end of the second elastic piece acts on the lock catch so as to realize the rotation reset of the lock catch; and one end of the third elastic piece acts on the base, and the other end of the third elastic piece acts on the handle so as to realize the rotary reset of the handle.
Preferably, the reset plate is provided with a pushing part, the lock catch is provided with a pushing receiving part, and the pushing part pushes the pushing receiving part to realize shifting of the lock catch by the reset plate.
Preferably, the pushing part and the pushing receiving part are respectively a bump structure integrally formed on the reset plate and the latch.
Preferably, the reset plate is further provided with an arc-shaped groove, the pushing portion is arranged at one end of the arc-shaped groove, and the pushing receiving portion extends into the arc-shaped groove.
The invention has the following beneficial effects: in the tripping mechanism, the reset plate and the lock catch share one pivot shaft, so that when the reset plate rotates to unlock the lock catch, the pushing action point of the lock catch cannot deviate, the locking part and the unlocked part cannot slide mutually, and the stability of tripping force and the reliability of a tripping process are further improved.
Drawings
Fig. 1 is a schematic perspective view of a residual current protection circuit breaker according to an embodiment;
fig. 2 is an exploded view of the earth leakage protection unit of the residual current circuit breaker in the embodiment;
FIG. 3 is a schematic perspective view of an embodiment of a leakage protection unit;
FIG. 4 is a front view (opening) of the earth leakage protection unit in the embodiment;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
fig. 6 is a front view (closing) of the earth leakage protection unit in the embodiment;
fig. 7 is a schematic perspective view of a circuit breaker unit in an embodiment;
FIG. 8 is a schematic illustration of the circuit breaker pole latch and trip bar mating in an embodiment;
fig. 9 is a schematic view of the reset plate and latch of the embodiment mated.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the drawings and the detailed description.
Referring to fig. 1-2, as a preferred embodiment of the present invention, a residual current circuit breaker is provided, which includes a circuit breaker unit 10 and an earth leakage protection unit 20 connected in parallel, where the circuit breaker unit 10 is used to open and close a circuit, and the earth leakage protection unit 20 is used to detect an earth leakage current in the circuit, and infer that the circuit breaker unit 10 is opened by the action of a trip mechanism, so as to protect the circuit.
As shown in fig. 2-7, the leakage protection unit 20 specifically includes a base 1, a handle 2, a trip mechanism 50, a first electromagnetic trip 8, a control circuit board 12, and a zero sequence current transformer 13, where the trip mechanism 50 includes a trip bar 4, a trip buckle 5, a lock catch 6, and a reset plate 7, the handle 2, the trip bar 4, the lock catch 6, and the reset plate 7 are all rotatably pivoted on the base 1, the trip buckle 5 is pivoted with the trip bar 4, where a pivot axis of the trip bar 4 and the base 1 is a shaft V, a pivot axis of the trip buckle 5 and the trip bar 4 is a shaft P, and the shaft V and the shaft P are not coaxial. The handle 2 is linked with the jump buckle 5 through the connecting rod 3, the lock catch 6 is provided with a locking part 61, and the jump buckle 5 is also provided with a locked part 51 which can be matched with the locking part 61 in a lock catch manner. As shown in fig. 4-6, in the open state of the circuit breaker (fig. 4), the handle 2 is toggled, the trip catch 5 is driven to rotate around the axis P through the linkage of the connecting rod 3 until the locked portion 51 and the locking portion 61 are locked (locked by the hasp) due to the rotation of the trip catch 5, at this time, the lock catch 6 forms a limit for the trip catch 5, the locking portion 61 provides a fulcrum for the trip catch 5, and the trip catch 5 jointly drives the trip bar 4 to rotate around the axis V under the continuous acting force of the handle 2. As shown in fig. 2, the trip bar 4 includes a linkage connection portion 41 extending into the breaker unit 10, and the linkage connection portion 41 cooperates with the operating mechanism 17 of the breaker unit 10 to close the breaker unit 10.
The zero sequence current transformer 13 is used for detecting leakage current in a loop, when the leakage current is detected, a signal is fed back to the control circuit board 12, after the control circuit board 12 sets the signal, an instruction is sent out again to enable the first electromagnetic release 8 to act, the reset plate 7 is arranged on one side of the first electromagnetic release 8, and when the output rod 81 of the first electromagnetic release 8 extends out, the reset plate 7 can be pushed to rotate. This reset plate 7 links with hasp 6 simultaneously, and reset plate 7 accepts after the promotion of 8 output levers 81 of first electromagnetism release 8 can push away to act on hasp 6 to stir hasp 6 and rotate, realize the unblock by locking part 51 and locking part 61. After the locked engagement between the locked portion 51 and the locking portion 61 is released, the trip mechanism 50 is quickly released to trip, and the trip lever 4 rotates and engages with the operating mechanism 17 of the circuit breaker unit 10, thereby tripping and tripping the leakage protection unit 20 and the circuit breaker unit 10. Specifically, as shown in fig. 8, the operating mechanism 17 includes a breaker pole latch 170, a lead-out portion 171 is disposed on the breaker pole latch 170, and when the trip mechanism 50 is tripped, the linkage connecting portion 41 of the trip lever 4 acts on the lead-out portion 171 to trip the breaker pole latch 170, so as to trip and open the circuit breaker unit 10.
In order to provide a reset force to each rotating member and enable the trip mechanism 50 to be rapidly tripped when the locked portion 51 and the locking portion 61 are unlocked by the reset force, as an exemplary embodiment, the present embodiment is further provided with a first elastic member, a second elastic member and a third elastic member (not shown in the figures), and the first elastic member, the second elastic member and the third elastic member are torsion springs, and one end of the first elastic member acts on the base 1, and the other end of the first elastic member acts on the reset plate 7, so as to maintain the contact between the reset plate 7 and the output rod 81 of the first electromagnetic trip 8 by virtue of the elastic force thereof, and to achieve the rotational reset of the reset plate 7 after rapid trip, thereby providing the reset force to the output rod 81. One end of the second elastic piece acts on the base 1, and the other end of the second elastic piece acts on the lock catch 4, so that the rotation reset of the lock catch 4 after quick tripping is realized; third elastic component one end acts on base 1, and the other end acts on handle 2 to realize fast tripping back handle 2's rotation and reset.
As shown in fig. 5, in the present embodiment, the locked portion 51 and the locking portion 61 are in a J-shaped hook structure that can be hooked with each other, so that the locking engagement between the two is more stable and reliable.
More importantly, in the present embodiment, the reset plate 7 and the latch 6 share one pivot shaft R, so that when the reset plate 7 rotates to unlock the latch 6, the pushing action point of the latch 6 will not shift because the rotation centers of the reset plate 7 and the latch 6 are overlapped, and the locked portion 51 and the locked portion 61 will not slide with each other, thereby further improving the stability of the tripping force and the reliability of the tripping process.
Fig. 9 shows a specific structure of the cooperation between the reset plate 7 and the latch 6, wherein the reset plate 7 is provided with a pushing portion 71, the latch 6 is provided with a pushing receiving portion 62, the reset plate 7 is pushed by the output rod 81 of the first electromagnetic release 8 and then rotates around the pivot axis R, and the pushing portion 71 can push against the pushing receiving portion 62, so as to toggle the latch 6 to rotate, and unlock the locked portion 51 and the locking portion 61.
In this embodiment, the pushing portion 71 and the pushing receiving portion 62 are formed as a protrusion integrally formed on the reset plate 7 and the latch 6, respectively, for facilitating production and manufacturing. In other embodiments, the pushing portion 71 and the push receiving portion 62 may be in any shape capable of abutting against each other, such as a plate shape, a rod shape, and the like. Furthermore, as shown in fig. 9, the reset plate 7 is further provided with an arc-shaped groove 72, the pushing portion 71 is disposed at one end of the arc-shaped groove 72, and the pushing receiving portion 62 extends into the arc-shaped groove 72, so that when assembling, by matching the pushing receiving portion 62 with the arc-shaped groove 72, the relative positions of the reset plate 7 and the latch 6 can be established to some extent, and the coaxiality of the two during assembling can be ensured.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. Leakage protection unit, including base and installation setting handle, tripping device and the first electromagnetism release in the base, handle and first electromagnetism release all with tripping device linkage is connected, in order to drive respectively tripping device's manual divide-shut brake and dropout separating brake, its characterized in that: tripping device includes trip bar, jump and detains, hasp and the board that resets, handle, trip bar, hasp and the board that resets all rotationally the pivot establish and connect on the base, the hasp shares a pin joint axle with the board that resets, jump detain with the connection is established to the trip bar pivot, the handle is connected with the linkage of jumping the knot, be equipped with a locking part on the hasp, jump detain on still be equipped with can with locking part hasp complex is locked the portion, the board that resets sets up one side of first electromagnetism release is in order to accept the promotion of the output lever of first electromagnetism release, thereby stirs the hasp is in order to relieve the hasp cooperation.
2. A residual current protection unit as claimed in claim 1, characterized in that: the locking part and the locked part are J-shaped hook structures which can be mutually hooked.
3. A residual current protection unit as claimed in claim 1, characterized in that: still include first elastic component, first elastic component one end acts on the base, the other end acts on reset the board to rely on its elastic force to keep reset the contact of board and the output lever of first electromagnetism release, and realize that the rotation of the board that resets.
4. A residual current protection unit as claimed in claim 1, characterized in that: the locking device further comprises a second elastic piece and a third elastic piece, wherein one end of the second elastic piece acts on the base, and the other end of the second elastic piece acts on the lock catch so as to realize the rotation reset of the lock catch; and one end of the third elastic piece acts on the base, and the other end of the third elastic piece acts on the handle so as to realize the rotary reset of the handle.
5. A residual current protection unit as claimed in claim 1, characterized in that: the reset plate is provided with a pushing portion, the lock catch is provided with a pushing receiving portion, and the pushing portion pushes against the pushing receiving portion to achieve shifting of the lock catch by the reset plate.
6. A residual current protection unit according to claim 5, characterized in that: the pushing part and the pushing receiving part are respectively of a lug structure which is integrally formed on the reset plate and the lock catch.
7. A residual current protection unit as claimed in claim 6, characterized in that: the reset plate is further provided with an arc-shaped groove, the pushing portion is arranged at one end of the arc-shaped groove, and the pushing receiving portion extends into the arc-shaped groove.
8. Residual current protection circuit breaker, including circuit breaker unit and earth leakage protection unit, its characterized in that: the earth leakage protection unit is the earth leakage protection unit of any one of claims 1-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210590003.XA CN114883154A (en) | 2022-05-27 | 2022-05-27 | Leakage protection unit and residual current protection circuit breaker |
| PCT/CN2023/090952 WO2023226673A1 (en) | 2022-05-27 | 2023-04-26 | Leakage protection unit and residual-current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210590003.XA CN114883154A (en) | 2022-05-27 | 2022-05-27 | Leakage protection unit and residual current protection circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114883154A true CN114883154A (en) | 2022-08-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210590003.XA Pending CN114883154A (en) | 2022-05-27 | 2022-05-27 | Leakage protection unit and residual current protection circuit breaker |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114883154A (en) |
| WO (1) | WO2023226673A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226673A1 (en) * | 2022-05-27 | 2023-11-30 | 厦门宏发开关设备有限公司 | Leakage protection unit and residual-current circuit breaker |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117912909A (en) * | 2024-03-06 | 2024-04-19 | 美高电气科技有限公司 | Electronic circuit breaker with arc fault protection function |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6771426B2 (en) * | 2017-05-12 | 2020-10-21 | 三菱電機株式会社 | Earth leakage breaker |
| CN108511288B (en) * | 2018-03-07 | 2023-09-05 | 广东南冠电气有限公司 | Small electromagnetic trip type leakage circuit breaker |
| CN209691710U (en) * | 2019-03-22 | 2019-11-26 | 公牛集团股份有限公司 | A kind of residual current action breaker |
| CN111900053A (en) * | 2020-09-02 | 2020-11-06 | 美高电气科技有限公司 | Earth leakage protection actuating mechanism and splicing type circuit breaker |
| CN114883154A (en) * | 2022-05-27 | 2022-08-09 | 厦门宏发开关设备有限公司 | Leakage protection unit and residual current protection circuit breaker |
| CN217444321U (en) * | 2022-05-27 | 2022-09-16 | 厦门宏发开关设备有限公司 | Leakage protection unit and residual current protection circuit breaker |
-
2022
- 2022-05-27 CN CN202210590003.XA patent/CN114883154A/en active Pending
-
2023
- 2023-04-26 WO PCT/CN2023/090952 patent/WO2023226673A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226673A1 (en) * | 2022-05-27 | 2023-11-30 | 厦门宏发开关设备有限公司 | Leakage protection unit and residual-current circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023226673A1 (en) | 2023-11-30 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20240201 Address after: No.560-564 Donglin Road, Jimei North Industrial Zone, Jimei District, Xiamen City, Fujian Province Applicant after: XIAMEN HONGFA AUTOMOTIVE ELECTRONICS Co.,Ltd. Country or region after: China Address before: No.566 Donglin Road, Jimei North Industrial Zone, Xiamen City, Fujian Province Applicant before: XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS Co.,Ltd. Country or region before: China |
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