CN109411303A - A kind of earth leakage protective breaker of band - Google Patents
A kind of earth leakage protective breaker of band Download PDFInfo
- Publication number
- CN109411303A CN109411303A CN201811375918.9A CN201811375918A CN109411303A CN 109411303 A CN109411303 A CN 109411303A CN 201811375918 A CN201811375918 A CN 201811375918A CN 109411303 A CN109411303 A CN 109411303A
- Authority
- CN
- China
- Prior art keywords
- earth leakage
- breaker
- leakage protective
- lever
- main casing
- 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.)
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Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 62
- 238000005192 partition Methods 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
Landscapes
- Breakers (AREA)
Abstract
The present invention relates to a kind of earth leakage protective breakers of band; including housing unit; earth leakage protective chamber, breaker chamber are equipped in the housing unit; the earth leakage protective is intracavitary to be equipped with earth leakage protective device assembly; the breaker is intracavitary to be equipped with breaker assembly; the housing unit includes main casing; the main casing two sides are connected with lid; partition is equipped in the main casing; earth leakage protective chamber, breaker chamber are formed by partition in the housing unit, earth leakage protective device assembly and breaker assembly are respectively mounted on a main housing.The current shell structure separated with earth leakage protective breaker is changed to a main casing and lid positioned at main casing two sides by the present invention; it is divided into earth leakage protective chamber and breaker chamber by partition; earth leakage protective device assembly and breaker assembly are respectively mounted on a main housing; then covering two sides lid can be completed assembling; reduce built-up time; it improves efficiency, greatly reduces production cost.
Description
Technical field
The present invention relates to a kind of earth leakage protective breakers of band.
Background technique
With earth leakage protective breaker, generally earth leakage protective device and miniature circuit breaker assembled side-by-side is formed, earth leakage protective
The shell of device and miniature circuit breaker is that lid shell and seat shell assemble, and is respectively equipped with one in earth leakage protective device and miniature circuit breaker
Trip assembley therefor is covered, is realized link by linkage mechanism between the two, conducting wire and union end conducting wire point is inscribed in the input terminal of breaker
Not Chuan Guo the input terminal in the seat shell of previous breaker and on lid shell wire guide and union end wire guide is inscribed up through leakage
Hole in non-electricity protector seat shell, input terminal are inscribed the zero sequence transformer that conducting wire passes through in earth leakage protective device and engage with union end conducting wire
The power input of i.e. each phase breaker all have passed through zero sequence transformer.Above-mentioned breaker structure is band leakage common currently on the market
The breaker structure of non-electricity protector, this structure are needed in assembling by the respective group of the component in earth leakage protective device or breaker
Install, but need by between earth leakage protective device and breaker linkage structure and conductor part connect, group is loaded onto very numerous
It is trivial.
Summary of the invention
The purpose of the invention is to overcome shortcoming and defect of the existing technology, and it is earth leakage protective to provide a kind of band
Breaker.
The technical solution used in the present invention is as follows: a kind of earth leakage protective breaker of band, including housing unit, the shell
Earth leakage protective chamber, breaker chamber are equipped in body component, the earth leakage protective is intracavitary to be equipped with earth leakage protective device assembly, the breaker
Intracavitary to be equipped with breaker assembly, the housing unit includes main casing, and the main casing two sides are connected with lid, the main casing
In be equipped with partition, by partition formation earth leakage protective chamber, breaker chamber in the housing unit, earth leakage protective device assembly and open circuit
Device assembly is respectively mounted on a main housing.
The main casing includes detachable first shell part and second shell part, the first shell part and
The first through hole passed through for conducting wire is formed after the splicing of two housing parts.
The first shell part and second shell part, which are respectively equipped with mutually overlapped stage portion and form grafting, matches
The connecting column of conjunction.
Handle, intracavitary the first lever for being equipped with linkage of the earth leakage protective and the first dynamic touching are hinged on the main casing
Head, intracavitary the second lever and the second moving contact for being equipped with linkage of the breaker, first lever and the second lever are hinged
In on partition, first lever and the second lever circumferentially link.
The partition is equipped with the second through-hole, is connected between first lever and the second lever across the second through-hole
Linkage post moves in the second through-hole with linkage post described in the first lever and the second lever rotation.
The earth leakage protective is intracavitary to be equipped with electric leakage tripping driver, the release lever with the electric leakage tripping driver cooperation,
The breaker is intracavitary to be equipped with buckle releaser, lock, tripping, and second lever middle is articulated on the partition and one end and hand
Handle is connected, the other end is connect with the second moving contact, and one end and lock hinged with partition abut against, separately in the middle part of the tripping
One end and the transmission of the second moving contact cooperate, and the partition is equipped with third through-hole, and the release lever passes through third through-hole and lock
It is connected.
The release lever includes for first rotary shaft hinged with partition, positioned at the first rotary shaft side and the leakage
First push plate portion of electricity tripping driver corresponding matching extends positioned at the first extension of the first rotary shaft other side and from first
The second extension that portion vertically extends, second extension pass through through-hole and resist the lock.
First push plate portion is equipped with hook, and the partition is equipped with spring top plate, in first rotary shaft
It is arranged with spring, the both ends of the spring are respectively held against hook and spring top plate, and the spring withstands the first push plate portion
Electric leakage tripping driver.
Test button is installed on the main casing, is equipped with test elastic component in the main casing, the test button with
The shell connection, in shell, the test elastic component is connect with test button end for the test elastic component part limit,
First lever is prepared for conductive material, and pressing the test button can make to test elastic component and the first lever contact.
The test button includes button portion, the clamping part being clamped at left and right sides of button portion with shell, pushing part, institute
It states shell and is equipped with the first through hole being adapted to the button portion, spring stop, be equipped between the button portion and spring stop
Return springs.
Beneficial effects of the present invention are as follows: the current shell structure separated with earth leakage protective breaker is changed to by the present invention
One main casing and the lid positioned at main casing two sides are divided into earth leakage protective chamber and breaker chamber, earth leakage protective device by partition
Component and breaker assembly are respectively mounted on a main housing, and then covering two sides lid can be completed assembling, reduce built-up time,
It improves efficiency, greatly reduces production cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without any creative labor, according to
These attached drawings obtain other attached drawings and still fall within scope of the invention.
Fig. 1 is the structural schematic diagram of breaker；
Fig. 2 is the perspective view of the explosion of housing unit；
Fig. 3 is the perspective view of the explosion of main casing；
Fig. 4 is the structural schematic diagram of the intracavitary driving parts part of earth leakage protective in main casing；
Fig. 5 is the enlarged diagram of A in Fig. 4；
Fig. 6 is the structural schematic diagram that main casing interrupts the intracavitary driving parts part of road device；
Fig. 7 is the enlarged diagram of B in Fig. 4；
Fig. 8 is the enlarged diagram of C in Fig. 6；
Fig. 9 is the structural schematic diagram of release lever；
Figure 10 is the structural schematic diagram of lock；
Figure 11 is the enlarged diagram of D in Fig. 4；
Figure 12 is the structural schematic diagram of test button；
Figure 13 is the structural schematic diagram that main casing is used to install test button part；
Figure 14 is diagrammatic cross-section of the housing unit at connecting column；
In figure, 1, main casing；101, third through-hole；102, spring top plate；103, partition；104, first shell part；105, the
Two housing parts；106, first through hole；107, connecting column；108, the second through-hole；109, fifth hole；1010, spring stop；
1011, fourth hole；1012, test elastic component chuck；1013, test elastic component card slot；1014, stage portion；2, electric leakage tripping
Driver；3, iron core；4, release lever；401, the first rotary shaft；402, the first push plate portion；403, the first extension；404, second
Extension；405, hook；5, buckle releaser；7, lock；701, the second rotary shaft；702, supporting block；703, third extension；
704, convex block；8, the first lever；9, the first moving contact；10, the second lever；11, the second moving contact；12, tripping；13, handle；
14, spring 15, lid；16, linkage post；17, test button；1701, button portion；1702, clamping part；1703, pushing part；
1704, extension；18, test elastic component；19, return springs.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
It should be noted that all statements for using " first " and " second " are for distinguishing in the embodiment of the present invention
Two non-equal entities of same names or non-equal parameter, it is seen that " first " " second " only for statement convenience, no
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
The direction and position term that the present invention is previously mentioned, for example, "upper", "lower", "front", "rear", "left", "right", "inner", "
Outside ", " top ", " bottom ", " side " etc. are only direction or position with reference to attached drawing.Therefore, the direction used and position term
It is rather than the limiting the scope of the invention to illustrate and understand the present invention.
As shown in Figure 1, a kind of earth leakage protective breaker of band, including housing unit, the housing unit is interior to be equipped with electric leakage
Chamber, breaker chamber are protected, the earth leakage protective is intracavitary to be equipped with earth leakage protective device assembly, and the breaker is intracavitary to be equipped with breaker group
Part, as shown in Fig. 2, the housing unit includes main casing 1,1 two sides of main casing are connected with lid 15, the main casing 1
In be equipped with partition 103, earth leakage protective chamber, breaker chamber, earth leakage protective device assembly are formed by partition 103 in the housing unit
It is installed on main casing 1 with breaker assembly.The current shell structure separated with earth leakage protective breaker is changed to one
Main casing and lid positioned at main casing two sides, are divided into earth leakage protective chamber and breaker chamber, earth leakage protective device assembly by partition
It is respectively mounted on a main housing with breaker assembly, then covering two sides lid can be completed assembling, reduce built-up time, improve
Efficiency greatly reduces production cost.
As shown in figs. 3 and 5, the main casing 1 includes detachable first shell part 104 and second shell part
105, the first through hole 106 passed through for conducting wire is formed after the first shell part 104 and the splicing of second shell part 105.Mesh
It is preceding it is common a lesser through-hole is respectively provided on miniature circuit breaker and earth leakage protective device shell, passed through for conducting wire, such as patent
Structure disclosed in CN96203657.9, it is careful to need when conducting wire passes through, and slowly moves through, and main casing 1 is divided into can
The first shell part 104 and second shell part 105 of fractionation are got around in threading from the side of first shell part 104
Assembling, second shell part 105 and first shell part 104 are spliced, conducting wire is limited to first shell part 104 after installing
In the first through hole 106 formed after splicing with second shell part 105, assembling is fastly, conveniently.
As shown in Figure 3, Figure 4, the first shell part 104 and second shell part 105 be respectively equipped with mutually overlapped
Stage portion 1014 and form mating connecting column 107.Second shell part 105 and first shell part 104 are spliced
When, second shell part 105 is placed on first shell part 104 from top to bottom.
As shown in figs. 4 and 6, it is hinged with handle 13 on the main casing 1, the earth leakage protective is intracavitary to be equipped with the of linkage
One lever 8 and the first moving contact 9, intracavitary the second lever 10 and the second moving contact 11 for being equipped with linkage of the breaker, described the
One lever 8 and the second lever 10 are articulated on partition 103, first lever 8 and the circumferential linkage of the second lever 10.It is described every
Plate 103 is equipped with the second through-hole 108, and the connection across the second through-hole 108 is connected between first lever 8 and the second lever 10
Dynamic column 16 rotates the linkage post 16 in the second through-hole 108 with the first lever 8 and the second lever 10 and moves.Realize that first is dynamic
The linkage of contact 9 and the second moving contact 11, wherein the linkage of the first lever 8 and the second lever 10 be by linkage post 16, can also
With by being articulated with same root hinge column, hinge column is to be rotatably connected with partition, hinge column and the first lever 8 and the second lever
10 are connected to be circumferential, and this structure also requires consideration for how to prevent hinge column from moving up and down.
The intracavitary release lever for being equipped with electric leakage tripping driver 2, cooperating with the electric leakage tripping driver 2 of the earth leakage protective
4, the tripping driver 2 that leaks electricity is interior to be equipped with iron core 3, and the breaker is intracavitary to be equipped with buckle releaser 5, latches 7, tripping 12, and described second
It is articulated in the middle part of lever 10 on the partition 103 and one end is connected with handle 13, the other end is connect with the second moving contact 11,
12 middle part of tripping is hinged with partition 103 and one end and lock 7 abut against, the transmission of the other end and the second moving contact 11 cooperates,
The partition 103 is equipped with third through-hole 101, and the release lever 4 passes through third through-hole 101 and is connected with lock 7.When electric leakage is threaded off
When driver detects drain conditions, iron core pushes release lever to rotate tripping, makes to disengage positioned at the intracavitary lock of breaker and jump
Button, realizes tripping, and structure is simple.
As shown in Fig. 7, Fig. 8, Fig. 9, the release lever 4 includes for first rotary shaft 401 hinged with partition 103, position
In 401 side of the first rotary shaft with the first push plate portion 402 of electric leakage tripping 2 corresponding matching of driver, positioned at the first rotation
First extension 403 of 401 other side of shaft and the second extension 404 vertically extended from the first extension 403, described
Two extensions 404 pass through through-hole 101 and resist the lock 7.
First push plate portion 402 is equipped with hook 405, and the partition 103 is equipped with spring top plate 102, described
Spring 14 is arranged in first rotary shaft 401, the both ends of the spring 14 are respectively held against hook 405 and spring top plate 102,
The spring 14 makes the first push plate portion 402 withstand electric leakage tripping driver 2.
As shown in Figure 10, the lock 7 includes for the second hinged rotary shaft 701, is located at 701 side of the second rotary shaft
With the supporting block 702 of 12 corresponding matching of tripping, positioned at 701 other side of the second rotary shaft and second extension
The 404 third extensions 703 for offseting cooperation, 703 outer end of third extension are equipped with convex block 704, the convex block 704 opposite the
Three extensions 703 are obliquely installed to 404 direction of the second extension.Convex block 704 makes lock 7 keep connecting with release lever 4.
As figs 11-13, test button 17 is installed on the main casing 1, test elasticity is equipped in the main casing 1
Part 18, the test button 17 are connect with the main casing 1, and 18 part of the test elastic component limit is described in main casing 1
Test elastic component 18 is connect with 15 end of test button, and first lever 8 is prepared for conductive material, presses the test
Button 17 can be such that test elastic component 18 contacts with the first lever 8.Test elastic component 18 is connect with circuit part, the first lever 8 and
First moving contact 9 can be powered connection, when the first moving contact 9 is closed state, pressing test button 15 make to test elastic component 18 with
First lever 8 contact, to make circuit part form short-circuit condition, so that whether test breaker in the short-circuit state can be just
Often tripping.
The test button 17 includes button portion 1701, the card positioned at button portion 1701 left and right sides and the clamping of main casing 1
Buckle 1702, pushing part 1703, the main casing 1 are equipped with fifth hole 109, the spring catch being adapted to the button portion 1701
Plate 1010 is equipped with return springs 19 between the button portion 1701 and spring stop 1010.Connection knot between main casing 1
Structure is simple, convenient for assembling.
About 1701 two sides of button portion are equipped with extension 1704, two extensions 1704 and two 1702 shapes of clamping part
The limit of pairs of return springs 19, one of 1704 outer end of extension connect pushing part 1703, the spring stop 102
Be equipped with the fourth hole 1011 that be adapted to the pushing part 1703, the pushing part 1703 across fourth hole 1011 with it is described
Elastic component 18 is tested to connect.Return springs 19 are prevented to be detached from button portion 1701.
It is equipped with test elastic component chuck 1012 in the main casing 1, is equipped with test in the test elastic component chuck 1012
One end of elastic component card slot 1013, the test elastic component 18 is connected to circuit board, and middle section passes through the test elastic component
Card slot 1013, the other end are connect with 17 end of test button.The test elastic component card slot 1013 is equipped at least one bending part,
Test elastic component will not move easily when pushing test elastic component in this way.
Wherein, test elastic component 18 is a metal clips, and return springs 19 are spring.
When assembling circuit breaker, first the intracavitary breaker assembly of breaker is mounted on partition, will need to protect through electric leakage
Intracavitary conducting wire is protected around the side of the reserved assembling second shell part 105 in first shell part 104, then by second shell portion
Divide 105 to put up, overlaps connecting column grafting and stage portion, by loop in first shell part 104 and second shell portion
Divide the first through hole 106 formed after 105 splicings, then the intracavitary earth leakage protective device assembly of earth leakage protective be mounted on partition,
Conducting wire, linkage post are connected, then lid 15 is covered from main casing two sides, is bolted, one of bolt, which passes through, to be connected
Column is connect, the bolt is also cross the lid 15 of first shell part 104, second shell part 105, two sides, and there are one bolts
Also cross the lid 15 of second shell part 105 and two sides, another there are three bolts also cross first shell part 104 and two
The lid 15 of side, realizes being reliably connected for housing unit, and easy to assembly simultaneously.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (10)
1. a kind of earth leakage protective breaker of band, including housing unit, the housing unit is interior to be equipped with earth leakage protective chamber, breaker
Chamber, the earth leakage protective is intracavitary to be equipped with earth leakage protective device assembly, and the breaker is intracavitary to be equipped with breaker assembly, and feature exists
In: the housing unit includes main casing (1), and main casing (1) two sides are connected with lid (15), in the main casing (1)
Equipped with partition (103), earth leakage protective chamber, breaker chamber, earth leakage protective device group are formed by partition (103) in the housing unit
Part and breaker assembly are installed on main casing (1).
2. the earth leakage protective breaker of band according to claim 1, it is characterised in that: the main casing (1) includes removable
The first shell part (104) and second shell part (105) divided, the first shell part (104) and second shell part
(105) first through hole (106) passed through for conducting wire is formed after splicing.
3. the earth leakage protective breaker of band according to claim 2, it is characterised in that: the first shell part (104)
Mutually overlapped stage portion (1014) is respectively equipped with second shell part (105) and forms mating connecting column
(107).
4. the earth leakage protective breaker of band according to claim 1, it is characterised in that: be hinged on the main casing (1)
Handle (13), intracavitary the first lever (8) for being equipped with linkage of the earth leakage protective and the first moving contact (9), the breaker are intracavitary
The second lever (10) and the second moving contact (11) equipped with linkage, first lever (8) and the second lever (10) are articulated with
On partition (103), first lever (8) and the second lever (10) circumferentially link.
5. the earth leakage protective breaker of band according to claim 4, it is characterised in that: the partition (103) is equipped with the
Two through-holes (108) are connected with the linkage post across the second through-hole (108) between first lever (8) and the second lever (10)
(16), the linkage post (16) is rotated with the first lever (8) and the second lever (10) to move in the second through-hole (108).
6. the earth leakage protective breaker of band according to claim 4, it is characterised in that: the earth leakage protective is intracavitary to be equipped with leakage
Electricity tripping driver (2), the release lever (4) with electric leakage tripping driver (2) cooperation, the breaker is intracavitary to be equipped with tripping
Device (5), lock (7), tripping (12), are articulated on the partition (103) in the middle part of second lever (10) and one end and handle
(13) it is connected, the other end is connect with the second moving contact (11), and one end hinged with partition (103) in the middle part of the tripping (12)
It is abutted against with lock (7), the transmission cooperation of the other end and the second moving contact (11), the partition (103) is equipped with third through-hole
(101), the release lever (4) passes through third through-hole (101) and is connected with lock (7).
7. the earth leakage protective breaker of band according to claim 6, it is characterised in that: the release lever (4) includes being used for
Hinged the first rotary shaft (401), driving with electric leakage tripping positioned at the first rotary shaft (401) side with partition (103)
The first push plate portion (402) of device (2) corresponding matching, be located at the first rotary shaft (401) other side the first extension (403) and from
The second extension (404) that first extension (403) vertically extends, second extension (404) pass through third through-hole
(101) lock (7) is resisted.
8. the earth leakage protective breaker of band according to claim 7, it is characterised in that: in first push plate portion (402)
Equipped with hook (405), the partition (103) is equipped with spring top plate (102), is arranged on first rotary shaft (401)
Have spring (14), the both ends of the spring (14) are respectively held against hook (405) and spring top plate (102), the spring
(14) the first push plate portion (402) is made to withstand electric leakage tripping driver (2).
9. the earth leakage protective breaker of band according to claim 4, it is characterised in that: be equipped on the main casing (1)
Test button (17), the main casing (1) is interior to be equipped with test elastic component (18), the test button (17) and the main casing
(1) it connects, test elastic component (18) part limit is in main casing (1), the test elastic component (18) and test button
(15) end connects, and first lever (8) is prepared for conductive material, and expeimental cartridge can be made by pressing the test button (17)
Property part (18) is contacted with the first lever (8).
10. the earth leakage protective breaker of band according to claim 9, it is characterised in that: the test button (17) includes
Button portion (1701) is located at left and right sides of button portion (1701) and the clamping part (1702) of main casing (1) clamping, pushing part
(1703), the main casing (1) is equipped with fifth hole (109), the spring stop being adapted to the button portion (1701)
(1010), return springs (19) are equipped between the button portion (1701) and spring stop (1010).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811375918.9A CN109411303A (en) | 2018-11-19 | 2018-11-19 | A kind of earth leakage protective breaker of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811375918.9A CN109411303A (en) | 2018-11-19 | 2018-11-19 | A kind of earth leakage protective breaker of band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109411303A true CN109411303A (en) | 2019-03-01 |
Family
ID=65474031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811375918.9A Pending CN109411303A (en) | 2018-11-19 | 2018-11-19 | A kind of earth leakage protective breaker of band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109411303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012990A (en) * | 2021-03-04 | 2021-06-22 | 李林 | Residual current circuit breaker with alarm prompt function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113012990A (en) * | 2021-03-04 | 2021-06-22 | 李林 | Residual current circuit breaker with alarm prompt function |
| CN113012990B (en) * | 2021-03-04 | 2024-05-14 | 徐进 | Leakage circuit breaker with alarm prompt facility |
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Application publication date: 20190301 |