CN113223903A - Electromagnetic trip type leakage tripping device with novel structure - Google Patents
Electromagnetic trip type leakage tripping device with novel structure Download PDFInfo
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- CN113223903A CN113223903A CN202110523726.3A CN202110523726A CN113223903A CN 113223903 A CN113223903 A CN 113223903A CN 202110523726 A CN202110523726 A CN 202110523726A CN 113223903 A CN113223903 A CN 113223903A
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- 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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Abstract
The invention relates to an electromagnetic trip type leakage tripping device with a novel structure, which comprises: casing, activity setting are in movable contact and fixed the setting in the casing are in fixed contact in the casing, movable contact is connected with and installs elastic component on the casing roof, just movable contact with fixed contact electric connection, elastic component is connected with and installs locking subassembly in the casing, locking subassembly is connected with the meshing structure through transmission structure, and when using, the electric leakage protection position is connected to the electromagnetic component, and when the condition of electric leakage appears, the electromagnetic component makes the flexible subassembly trigger work to flexible subassembly drives the meshing structure motion, and the meshing structure drives the locking subassembly motion through transmission structure for elastic component takes place the motion, thereby movable contact and fixed contact separation have realized effectual electric leakage automatic tripping function.
Description
Technical Field
The invention relates to the technical field related to an electric leakage tripping device, in particular to an electromagnetic tripping type electric leakage tripping device with a novel structure.
Background
The leakage circuit breaker is divided into two types, one is an electronic leakage circuit breaker, the other is an electromagnetic leakage circuit breaker, at present, developed countries widely apply electromagnetic trip type leakage circuit breakers, and the leakage circuit breaker protected by the electromagnetic trip type leakage circuit breaker is a mechanical electromagnetic control mechanism formed by processing metal materials such as high-magnetic-permeability materials and permanent magnetic steel.
The leakage short-circuiting device for the electromagnetic trip type protection does not need an auxiliary power supply, is not stirred or lost by power supply voltage, can play a role of protection as long as leakage current is generated, is not interfered by voltage impact and electromagnetic waves simultaneously, does not generate misoperation, and does not damage a product per se when the power supply end is reversely connected with a load, thereby more effectively protecting the safety of load power consumption and lives and property.
The existing electromagnetic leakage circuit breaker basically only has a circuit breaker taking a small breaker as a structure, is complex in structure, poor in automation and easy to cause problems in tripping, and therefore ideal safety is often difficult to achieve in the process of leakage protection.
Disclosure of Invention
The present invention is directed to an electromagnetic trip type leakage tripping device with a novel structure to solve the problems of the background art mentioned above.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an electromagnetism trip formula electric leakage trip gear of novel structure, electromagnetism trip formula electric leakage trip gear of novel structure includes: the movable contact is connected with an elastic component arranged on the top wall of the shell, and the movable contact is electrically connected with the fixed contact;
the elastic component is connected with a locking component arranged in the shell, the locking component is connected with a meshing structure through a transmission structure, and the meshing structure is connected with a telescopic component arranged on the bottom wall of the shell;
the electromagnetism trip formula electric leakage trip gear of novel structure is still including installing electromagnetic component in the casing, electromagnetic component with flexible subassembly cooperation works as electromagnetic component during operation, flexible subassembly triggers work, drives the meshing structure motion, the meshing structure passes through drive structure drives the closure subassembly motion, so that the elastic component motion, movable contact with fixed contact separation.
As a further scheme of the invention: the electromagnetic assembly comprises an iron bar fixedly mounted on the bottom wall of the shell and a coil wound on the iron bar, the two ends of the coil are connected with a concentrator on the inner wall of the shell, and a wiring port of the concentrator is connected with a leakage protection circuit through a wire.
As a still further scheme of the invention: the telescopic assembly comprises a second fixed cylinder fixedly mounted on the bottom wall of the shell, a second pressure spring arranged in the second fixed cylinder and a telescopic rod arranged in the second fixed cylinder in a sliding manner;
one end of the second pressure spring is connected with the bottom wall of the second fixing cylinder, the other end of the second pressure spring is connected with one end of the telescopic rod, and an iron block is fixedly mounted at the other end of the telescopic rod.
As a still further scheme of the invention: the meshing structure is including fixed the setting rack plate on the telescopic link is installed with rotating the gear on the casing diapire, just the gear with rack plate cooperation, and with transmission structure connects.
As a still further scheme of the invention: the elastic assembly comprises a first fixed cylinder fixedly mounted on the top wall of the shell, a telescopic plate arranged in the first fixed cylinder in a sliding mode, and a first pressure spring which is sleeved on the periphery of the telescopic plate and is in a compressed state;
the two ends of the first fixed cylinder are arranged in a through mode, a through hole for a lead to pass through is formed in the lateral portion of the expansion plate, a notch matched with the locking assembly is formed in the lower portion of the expansion plate, and the movable contact is fixedly arranged at one end, far away from the first fixed cylinder, of the expansion plate.
As a still further scheme of the invention: the locking assembly comprises a fixed shaft fixedly arranged on the bottom wall of the shell, a sleeve pipe arranged on the fixed shaft in a sliding mode, and a first fixing plate fixedly arranged at one end, far away from the bottom wall of the shell, of the sleeve pipe;
the first fixing plate is provided with a second fixing plate through four torsion springs, the second fixing plate is fixedly provided with a clamping plate matched with the groove opening in the lower portion of the expansion plate, and the sleeve is connected with the transmission assembly.
As a still further scheme of the invention: the transmission assembly comprises a disc and a connecting rod, the disc is coaxially and fixedly installed with the gear, the connecting rod is connected with the disc and the sleeve, one end of the connecting rod is rotatably connected with the sleeve, and the other end of the connecting rod is rotatably connected with the eccentric position of the disc.
As a still further scheme of the invention: a bar-shaped sliding groove is further formed in the upper portion of the shell, a moving rod is arranged in the bar-shaped sliding groove in a sliding mode, and one end of the moving rod, which is located in the shell, is fixedly connected with the telescopic plate.
Compared with the prior art, the invention has the beneficial effects that: the electromagnetic component is connected with the leakage protection part when the leakage protection device is used, and when the leakage occurs, the electromagnetic component enables the telescopic component to trigger to work, so that the telescopic component drives the meshing structure to move, the meshing structure drives the locking component to move through the transmission structure, the elastic component moves, the movable contact is separated from the fixed contact, and the effective leakage automatic tripping function is realized.
Drawings
Fig. 1 is a schematic structural view of an embodiment of an electromagnetic trip type leakage tripping device with a novel structure.
Fig. 2 is an enlarged view of a structure at a in fig. 1.
Fig. 3 is an enlarged view of the structure at B in fig. 1.
Fig. 4 is a cross-sectional view of the first stationary barrel in an embodiment of the electromagnetic trip type electrical leakage tripping apparatus of the novel structure.
Fig. 5 is a schematic view showing a connection relationship between the engaging plate, the retractable plate and the movable rod in an embodiment of the electromagnetic trip type leakage tripping device with a novel structure.
Fig. 6 is a schematic view showing a connection state of a disk and a link in an embodiment of an electromagnetic trip type earth leakage trip device of a novel structure.
In the figure: 1-a shell; 2-a hub; 3-an iron rod; 4-a coil; 5-a first fixed cylinder; 6-a movable contact; 7-a fixed contact; 8-a first pressure spring; 9-moving the rod; 10-a fixed shaft; 11-a sleeve; 12-a first fixing plate; 13-a second fixing plate; 14-a snap plate; 15-torsion spring; 16-a second stationary cylinder; 17-a second compression spring; 18-a telescopic rod; 19-a rack plate; 20-a gear; 21-a connecting rod; 22-a disc; 23-iron blocks; 24-expansion plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1 to 6, in an embodiment of the present invention, an electromagnetic trip type leakage tripping device with a novel structure includes: the contact device comprises a shell 1, a movable contact 6 movably arranged in the shell 1 and a fixed contact 7 fixedly arranged in the shell 1, wherein the movable contact 6 is connected with an elastic component arranged on the top wall of the shell 1, and the movable contact 6 is electrically connected with the fixed contact 7;
the elastic component is connected with a locking component arranged in the shell 1, the locking component is connected with a meshing structure through a transmission structure, and the meshing structure is connected with a telescopic component arranged on the bottom wall of the shell 1;
the electromagnetism trip formula electric leakage trip gear of novel structure is still including installing electromagnetic component in casing 1, electromagnetic component with flexible subassembly 9 cooperation, works as electromagnetic component during operation, flexible subassembly triggers work, drives the latch structure motion, the latch structure passes through drive structure drives the closure subassembly motion, so that the elastic component motion, movable contact 6 with fixed contact 7 separation.
In the embodiment of the invention, when the electromagnetic component is used, the electromagnetic component is connected with the leakage protection part, when the leakage occurs, the electromagnetic component enables the telescopic component to trigger to work, so that the telescopic component drives the meshing structure to move, the meshing structure drives the locking component to move through the transmission structure, the elastic component moves, and the movable contact 6 is separated from the fixed contact 7, thereby realizing the effective leakage automatic tripping function.
As an embodiment of the invention, the electromagnetic assembly comprises an iron bar 3 fixedly installed on the bottom wall of the shell 1 and a coil 4 wound on the iron bar 3, two ends of the coil 4 are connected with a concentrator 2 installed on the inner wall of the shell 1, and a wiring port of the concentrator 2 is connected with a leakage protection circuit through a lead.
In the embodiment of the invention, when electric leakage occurs, the coil 4 is electrified through the concentrator 2, so that the coil 4 generates an annular magnetic field around, the iron rod 3 is magnetized, the iron rod 3 is matched with the telescopic assembly, the telescopic assembly is triggered to move, and the automation of electric leakage protection is ensured.
As an embodiment of the present invention, the telescopic assembly includes a second fixed cylinder 16 fixedly mounted on the bottom wall of the housing 1, a second pressure spring 17 disposed inside the second fixed cylinder 16, and a telescopic rod 18 slidably disposed inside the second fixed cylinder 16;
one end of the second pressure spring 17 is connected with the bottom wall of the second fixing cylinder 16, the other end of the second pressure spring is connected with one end of the telescopic rod 18, and an iron block 23 is fixedly mounted at the other end of the telescopic rod 18.
In the embodiment of the invention, when the electromagnetic assembly works, the iron rod 3 attracts the iron block 23, so that the iron block 23 drives the telescopic rod 18 to move towards the iron rod 3, the second pressure spring 17 is stretched, and the meshing structure triggers work in the moving process of the telescopic rod 18, and the transmission structure drives the locking assembly to move, so that the elastic assembly moves, and the movable contact 6 is separated from the fixed contact 7.
As an embodiment of the present invention, the engaging structure comprises a rack plate 19 fixedly disposed on the telescopic rod 18 and a gear 20 rotatably mounted on the bottom wall of the housing 1, and the gear 20 is engaged with the rack plate 19 and connected with the transmission structure.
In the embodiment of the present invention, when the telescopic assembly moves, the telescopic rod 18 drives the rack plate 19 to move toward the iron rod 3, so that the rack plate 19 is matched with the gear 20, the gear 20 rotates, and the gear 20 drives the transmission assembly to move.
As an embodiment of the present invention, the elastic assembly includes a first fixed cylinder 5 fixedly installed on the top wall of the housing 1, a telescopic plate 24 slidably disposed in the first fixed cylinder 5, and a first pressure spring 8 disposed around the telescopic plate 24 and in a compressed state;
the two ends of the first fixed cylinder 5 are arranged in a penetrating manner, a through hole for a lead to pass through is formed in the side portion of the expansion plate 24, a notch matched with the locking component is formed in the lower portion of the expansion plate 24, and the movable contact 6 is fixedly arranged at one end, far away from the first fixed cylinder 5, of the expansion plate 24.
In the embodiment of the invention, when the meshing structure moves, the gear 20 drives the clamping component to move through the transmission component, when the clamping component is gradually pulled out from the notch at the lower part of the telescopic plate 24, and when the clamping component is separated from the telescopic plate 24, the first pressure spring 8 returns due to the elasticity of the first pressure spring 8, the telescopic plate 24 drives the movable contact 6 to move towards the direction far away from the fixed contact 7, so that the movable contact 6 is separated from the fixed contact 7, and the circuit is effectively cut off.
As an embodiment of the present invention, the locking assembly includes a fixed shaft 10 fixedly mounted on the bottom wall of the housing 1, a sleeve 11 slidably disposed on the fixed shaft 10, and a first fixing plate 12 fixedly mounted on an end of the sleeve 11 away from the bottom wall of the housing 1;
the first fixing plate 12 is provided with a second fixing plate 13 through four torsion springs 15, the second fixing plate 13 is fixedly provided with a clamping plate 14 matched with the groove opening at the lower part of the expansion plate 24, and the sleeve 11 is connected with the transmission assembly.
In the embodiment of the present invention, when the engaging structure moves, the gear 20 drives the sleeve 11 to slide toward the bottom wall of the housing 1 through the transmission assembly, so that the sleeve 11 drives the first fixing plate 12 and the second fixing plate 13 to move therewith until the engaging plate 14 is pulled away from the notch at the lower portion of the retractable plate 24, and the elastic assembly moves, so that the movable contact 6 is separated from the fixed contact 7.
As an embodiment of the present invention, the transmission assembly includes a disc 22 fixedly installed coaxially with the gear 20, and a connecting rod 21 connecting the disc 22 and the sleeve 11, and one end of the connecting rod 21 is rotatably connected to the sleeve 11, and the other end is rotatably connected to an eccentric portion of the disc 22.
In the embodiment of the present invention, when the engaging structure moves, since the gear 20 and the disc 22 are coaxially and fixedly disposed, the gear 20 drives the disc 22 to rotate, and the disc 22 drives the sleeve 11 to slide toward the bottom wall of the housing 1 through the connecting rod 21 until the engaging plate 14 is pulled away from the notch at the lower portion of the retractable plate 24, thereby implementing an effective transmission function for the engaging assembly.
As an embodiment of the present invention, a bar-shaped sliding groove is further formed in the upper portion of the housing 1, a moving rod 9 is slidably disposed in the bar-shaped sliding groove, and one end of the moving rod 9 located inside the housing 1 is fixedly connected to the expansion plate 24.
In the embodiment of the present invention, after the electric leakage phenomenon is solved, the magnetism of the iron rod 3 disappears, the second compression spring 17 is restored by its own elastic force to make the telescopic rod 18 slide towards the second fixed cylinder 16, so that the meshing structure, the transmission structure and the locking assembly work reversely until the original state is restored, then the moving rod 9 is pulled towards the reverse direction away from the first fixed cylinder 5, the telescopic plate 24 moves along with the moving rod 9, and in the moving process, the first compression spring 8 is compressed, the bottom of the telescopic plate 24 contacts with the engaging plate 14, the torsion spring 15 is compressed, when the notch at the lower part of the telescopic plate 24 moves to the position corresponding to the engaging plate 14, the torsion spring 15 is restored by its own elastic force to make the engaging plate 14 inserted into the notch at the lower part of the telescopic plate 24, the movable contact 6 is stably butted with the fixed contact 7, so that the device is restored to the state before the electric leakage protection, is convenient for the next use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides an electromagnetism trip formula electric leakage trip gear of novel structure, its characterized in that, the electromagnetism trip formula electric leakage trip gear of novel structure includes: the device comprises a shell (1), a movable contact (6) movably arranged in the shell (1) and a fixed contact (7) fixedly arranged in the shell (1), wherein the movable contact (6) is connected with an elastic component arranged on the top wall of the shell (1), and the movable contact (6) is electrically connected with the fixed contact (7);
the elastic component is connected with a locking component arranged in the shell (1), the locking component is connected with a meshing structure through a transmission structure, and the meshing structure is connected with a telescopic component arranged on the bottom wall of the shell (1);
the electromagnetic trip type leakage tripping device with the novel structure is characterized in that the electromagnetic trip type leakage tripping device with the novel structure further comprises an electromagnetic assembly arranged in the shell (1), the electromagnetic assembly is matched with the telescopic assembly (9), when the electromagnetic assembly works, the telescopic assembly triggers to work to drive the meshing structure to move, the meshing structure passes through the transmission structure to drive the locking assembly to move, so that the elastic assembly moves, and the movable contact (6) is separated from the fixed contact (7).
2. The electromagnetic trip type leakage tripping device with the novel structure according to claim 1, wherein the electromagnetic assembly comprises an iron rod (3) fixedly mounted on the bottom wall of the casing (1) and a coil (4) wound on the iron rod (3), two ends of the coil (4) are connected with a concentrator (2) mounted on the inner wall of the casing (1), and a connection port of the concentrator (2) is connected with the leakage protection circuit through a lead.
3. The electromagnetic trip type leakage tripping device with a novel structure according to claim 2, wherein the telescopic assembly comprises a second fixed cylinder (16) fixedly mounted on the bottom wall of the housing (1), a second compression spring (17) arranged inside the second fixed cylinder (16), and a telescopic rod (18) slidably arranged in the second fixed cylinder (16);
one end of the second pressure spring (17) is connected with the bottom wall of the second fixing cylinder (16), the other end of the second pressure spring is connected with one end of the telescopic rod (18), and an iron block (23) is fixedly mounted at the other end of the telescopic rod (18).
4. A new structure of electromagnetic trip type leakage tripping device according to claim 3, characterized in that said engaging structure comprises a rack plate (19) fixedly arranged on said telescopic rod (18) and a gear (20) rotatably mounted on the bottom wall of said housing (1), and said gear (20) is engaged with said rack plate (19) and connected with said transmission structure.
5. The electromagnetic trip type leakage tripping device with a novel structure according to claim 1, wherein the elastic component comprises a first fixed cylinder (5) fixedly mounted on the top wall of the housing (1), a telescopic plate (24) slidably arranged in the first fixed cylinder (5), and a first compression spring (8) sleeved on the periphery of the telescopic plate (24) and in a compressed state;
the two ends of the first fixed cylinder (5) are arranged in a penetrating mode, a through hole for a lead to pass through is formed in the side portion of the expansion plate (24), a notch matched with the locking assembly is formed in the lower portion of the expansion plate (24), and the movable contact (6) is fixedly arranged at one end, far away from the first fixed cylinder (5), of the expansion plate (24).
6. The electromagnetic trip type leakage tripping device with a novel structure according to claim 5, wherein the locking assembly comprises a fixed shaft (10) fixedly mounted on the bottom wall of the housing (1), a sleeve (11) slidably arranged on the fixed shaft (10), and a first fixing plate (12) fixedly mounted on one end of the sleeve (11) far away from the bottom wall of the housing (1);
the utility model discloses a telescopic pipe, including first fixed plate (12), first torsional spring (15), second fixed plate (13) are provided with through four torsional springs (15) on first fixed plate (12), on second fixed plate (13) fixed mounting with block board (14) of notch looks adaptation of expansion plate (24) lower part, just sleeve pipe (11) with transmission assembly connects.
7. The electromagnetic trip type leakage tripping device with a novel structure according to claim 6, wherein the transmission assembly comprises a disk (22) fixedly mounted coaxially with the gear (20) and a connecting rod (21) connecting the disk (22) and the sleeve (11), and one end of the connecting rod (21) is rotatably connected with the sleeve (11) and the other end is rotatably connected with the eccentric position of the disk (22).
8. The electromagnetic trip type leakage tripping device with a novel structure according to claim 5, wherein a bar-shaped sliding groove is further formed in the upper portion of the housing (1), a moving rod (9) is slidably arranged in the bar-shaped sliding groove, and one end of the moving rod (9) located inside the housing (1) is fixedly connected with the expansion plate (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110523726.3A CN113223903B (en) | 2021-05-13 | 2021-05-13 | Electromagnetic trip type leakage tripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110523726.3A CN113223903B (en) | 2021-05-13 | 2021-05-13 | Electromagnetic trip type leakage tripping device |
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| Publication Number | Publication Date |
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| CN113223903A true CN113223903A (en) | 2021-08-06 |
| CN113223903B CN113223903B (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110523726.3A Active CN113223903B (en) | 2021-05-13 | 2021-05-13 | Electromagnetic trip type leakage tripping device |
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| CN (1) | CN113223903B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117310214A (en) * | 2023-11-29 | 2023-12-29 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Outdoor department outage formula electric leakage indicating device that registers one's residence |
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| JPH04312733A (en) * | 1991-04-11 | 1992-11-04 | Fuji Electric Co Ltd | Electromagnetic trip device for circuit breaker |
| CN102044385A (en) * | 2009-10-20 | 2011-05-04 | Ls产电株式会社 | Molded case circuit breaker having an instantaneous trip mechanism |
| CN102543607A (en) * | 2011-12-15 | 2012-07-04 | 常熟开关制造有限公司(原常熟开关厂） | Over-current tripper with self-locking function |
| CN105513915A (en) * | 2016-02-15 | 2016-04-20 | 佳一电气有限公司 | Intelligent circuit breaker combined device |
| CN112728771A (en) * | 2020-12-31 | 2021-04-30 | 诸暨旭泰机械有限公司 | Water flow control device with alarm indication for gas water heater |
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2021
- 2021-05-13 CN CN202110523726.3A patent/CN113223903B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04312733A (en) * | 1991-04-11 | 1992-11-04 | Fuji Electric Co Ltd | Electromagnetic trip device for circuit breaker |
| CN102044385A (en) * | 2009-10-20 | 2011-05-04 | Ls产电株式会社 | Molded case circuit breaker having an instantaneous trip mechanism |
| CN102543607A (en) * | 2011-12-15 | 2012-07-04 | 常熟开关制造有限公司(原常熟开关厂） | Over-current tripper with self-locking function |
| CN105513915A (en) * | 2016-02-15 | 2016-04-20 | 佳一电气有限公司 | Intelligent circuit breaker combined device |
| CN112728771A (en) * | 2020-12-31 | 2021-04-30 | 诸暨旭泰机械有限公司 | Water flow control device with alarm indication for gas water heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117310214A (en) * | 2023-11-29 | 2023-12-29 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Outdoor department outage formula electric leakage indicating device that registers one's residence |
| CN117310214B (en) * | 2023-11-29 | 2024-02-06 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Outdoor department outage formula electric leakage indicating device that registers one's residence |
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| CN113223903B (en) | 2022-09-16 |
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