CN120453102B - Ring main unit with tristable permanent magnet mechanism - Google Patents
Ring main unit with tristable permanent magnet mechanismInfo
- Publication number
- CN120453102B CN120453102B CN202510561975.XA CN202510561975A CN120453102B CN 120453102 B CN120453102 B CN 120453102B CN 202510561975 A CN202510561975 A CN 202510561975A CN 120453102 B CN120453102 B CN 120453102B
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- contact
- grounding
- pull rod
- armature
- tristable
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to power equipment, in particular to a ring main unit with a tristable permanent magnet mechanism, which comprises a cabinet body, a pull rod arranged in the cabinet body, a pull rod driving device, a moving contact, a fixed contact, a second grounding contact and a vacuum arc-extinguishing chamber, wherein the second grounding contact and the fixed contact are both fixed in the vacuum arc-extinguishing chamber, the fixed contact is positioned below the moving contact, the second grounding contact is positioned above the moving contact, the lower end of the pull rod extends into the vacuum arc-extinguishing chamber, the moving contact is connected to the lower end of the pull rod, the pull rod driving device is connected with the pull rod, and the pull rod driving device is used for driving the pull rod to move up and down so as to enable the moving contact to be in contact with the fixed contact, the moving contact to be disconnected with the fixed contact and the moving contact to be in contact with the second grounding contact. The invention can realize tristable state and higher safety.
Description
Technical Field
The invention relates to power equipment, in particular to a ring main unit with a tristable permanent magnet mechanism.
Background
In an electrical power system, high-voltage switching devices play a vital role, and their operating state directly influences the stability and safety of the electrical power system.
The existing high-voltage switch equipment drives the insulating pull rod through the operating mechanism, so that the vacuum circuit breaker is closed or opened, but due to the limited structure, the high-voltage switch can only realize bistable state, namely can only realize the state of opening and closing, can not realize automatic grounding state, and the safety is not guaranteed.
Disclosure of Invention
The invention aims to solve the technical problem of providing the ring main unit with the tristable permanent magnet mechanism, which can realize tristable and has higher safety.
In order to solve the technical problems, the application provides the following technical scheme:
The invention discloses a ring main unit with a tristable permanent magnet mechanism, which comprises a cabinet body, a pull rod arranged in the cabinet body, a pull rod driving device, a moving contact, a fixed contact, a second grounding contact and a vacuum arc-extinguishing chamber, wherein the second grounding contact and the fixed contact are both fixed in the vacuum arc-extinguishing chamber, the fixed contact is positioned below the moving contact, the second grounding contact is positioned above the moving contact, the lower end of the pull rod stretches into the vacuum arc-extinguishing chamber, the moving contact is connected to the lower end of the pull rod, the pull rod driving device is connected with the pull rod, and the pull rod driving device is used for driving the pull rod to move up and down so as to enable the moving contact to contact the fixed contact, the moving contact to be disconnected with the fixed contact and the moving contact to contact with the second grounding contact.
Further, the pull rod driving device comprises a regulator, an armature and a permanent magnet, wherein a hollow cavity is formed in the permanent magnet, the armature is arranged in the hollow cavity, the top of the armature extends out of the permanent magnet, the regulator is connected with the armature, the bottom of the armature is connected with the upper end of the pull rod, and the regulator is used for regulating the direction of current in the armature and the magnitude of current in the armature, so that the armature drives the pull rod to move up and down.
Further, the pull rod driving device further comprises an armature limiting assembly, the armature limiting assembly comprises a limiting cylinder, the limiting cylinder is connected with the cabinet body, the limiting cylinder is vertically arranged, the limiting cylinder is sleeved outside the armature, and the armature is suitable for moving up and down relative to the limiting cylinder.
Further, the armature limiting assembly further comprises a transverse shaft fixedly arranged at the top of the cabinet body, and the limiting cylinder is fixedly connected to the transverse shaft.
Further, the top of the armature is also provided with a limiting plate.
Further, the permanent magnet comprises a shell, a movable iron core, a coil, a static iron core and a plurality of magnetic steel sheets, wherein the movable iron core, the coil and the static iron core are arranged in the shell in sequence from top to bottom, and the magnetic steel sheets are connected to the outer side wall of the static iron core.
Further, the static contact comprises a static contact seat, a compensation contact and a compensation spring, a groove is formed in the static contact seat, the compensation contact and the compensation spring are both arranged in the groove, the compensation contact is located above the compensation spring, one end of the compensation spring is connected to the bottom of the groove, the other end of the compensation spring is connected with the compensation contact, and the top of the compensation contact is higher than the top of the static contact seat when the compensation spring is in a natural state.
Further, still including set up in the internal ground protector of cabinet, ground protector includes ground switch blade, first ground contact, ground copper bar ground connection, first ground contact with the ground copper bar is connected, the internal busbar that is provided with of cabinet, the busbar with the ground switch blade is connected, the ground switch blade be suitable for with first ground contact is connected or is broken, the second ground contact with the ground switch blade is connected.
Further, the ground protection device further comprises a switch blade driving assembly, the switch blade driving assembly comprises a driving shaft, a crank arm and a sliding sleeve, the driving shaft is connected to the inner wall of the cabinet body, the crank arm is arc-shaped, a supporting lug is arranged on the driving shaft, one end of the crank arm is hinged to the supporting lug, the other end of the crank arm is hinged to the sliding sleeve, the sliding sleeve is sleeved on the ground switch blade, the driving shaft rotates, and the driving shaft drives the ground switch blade to rotate through the crank arm so that the ground switch blade is connected with or disconnected from the first ground contact.
Further, the first ground contact is L-shaped, one end of the grounding switch blade matched with the first ground contact is a U-shaped connecting end, and when the grounding switch blade is connected with the first ground contact, the U-shaped connecting end is inserted into the first ground contact.
Compared with the prior art, the ring main unit with the tristable permanent magnet mechanism has at least the following beneficial effects:
The ring main unit with the tristable permanent magnet mechanism comprises a pull rod, a pull rod driving device, a moving contact, a fixed contact and a second grounding contact, wherein the pull rod driving device is used for driving the pull rod to move up and down, so that the moving contact is contacted with the fixed contact, the moving contact is disconnected with the fixed contact, and the moving contact is contacted with the second grounding contact, thereby realizing three states of opening, closing and grounding, enabling the switch main unit to have tristable state, leading the residual electric arc in the ring main unit after opening to the ground, and improving the safety of the ring main unit.
The ring main unit with the tristable permanent magnetic mechanism is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a first front view overall schematic of a ring main unit with a tristable permanent magnet mechanism of the present invention;
FIG. 2 is a schematic diagram of a second front view of the ring main unit with a tristable permanent magnetic mechanism of the present invention;
FIG. 3 is a third front view overall schematic of the ring main unit with the tristable permanent magnetic mechanism of the present invention;
FIG. 4 is a fourth front view overall schematic of the ring main unit with the tristable permanent magnetic mechanism of the present invention;
FIG. 5 is a schematic diagram of the overall rear view of a ring main unit with a tristable permanent magnet mechanism of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 1 at A;
FIG. 7 is a partial enlarged view at B in FIG. 2;
FIG. 8 is an enlarged view of a portion of FIG. 2 at C;
FIG. 9 is a partial enlarged view at D in FIG. 2;
FIG. 10 is an enlarged view of a portion of FIG. 3 at E;
FIG. 11 is an enlarged view of a portion of F in FIG. 4;
fig. 12 is a schematic structural diagram of a static contact in a ring main unit with a tristable permanent magnetic mechanism.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3, fig. 6 and fig. 8, the ring main unit with the tristable permanent magnet mechanism comprises a cabinet body 1, a pull rod 6 arranged in the cabinet body 1, a pull rod driving device, a moving contact 17, a fixed contact 18, a second grounding contact 19 and a vacuum arc-extinguishing chamber 16, wherein the second grounding contact 19 is used for grounding, the second grounding contact 19 and the fixed contact 18 are both fixed in the vacuum arc-extinguishing chamber 16, the fixed contact 18 is positioned below the moving contact 17, the second grounding contact 19 is positioned above the moving contact 17, the lower end of the pull rod 6 stretches into the vacuum arc-extinguishing chamber 16, the moving contact 17 is connected to the lower end of the pull rod 6, the pull rod driving device is connected with the pull rod 6, and the pull rod driving device is used for driving the pull rod 6 to move up and down, so that the moving contact 17 is contacted with the fixed contact 18, the moving contact 17 is disconnected with the fixed contact 18, and the moving contact 17 is contacted with the second grounding contact 19, and an arc generated by closing and opening through the vacuum arc-extinguishing chamber 16, and switching-off can be avoided to influence on operation safety. Specifically, the second ground contact 19 is annular, the lower end of the pull rod 6 passes through the second ground contact 19, and one pull rod 6, the pull rod driving device, the moving contact 17, the fixed contact 18, the second ground contact 19 and the vacuum arc extinguishing chamber 16 are a group of switch assemblies, in this embodiment, three groups of switch assemblies are provided. When the ring main unit with the tristable permanent magnet mechanism is used, the pull rod 6 is driven by the pull rod driving device to move downwards, so that the movable contact 17 is tightly contacted with the fixed contact 18 to realize a first stable state, namely switching on, the pull rod 6 is driven by the pull rod driving device to move upwards, so that the movable contact 17 is separated from the fixed contact 18 to realize a second stable state, namely switching off, and the distance of the pull rod 6 which is driven by the pull rod driving device to move upwards is increased, so that the movable contact 17 is tightly contacted with the second grounding contact 19 to realize a third stable state, namely grounding. The ring main unit with the tristable permanent magnet mechanism comprises the pull rod 6, the pull rod driving device, the moving contact 17, the fixed contact 18 and the second grounding contact 19, wherein the pull rod driving device is used for driving the pull rod 6 to move up and down, so that the moving contact 17 is contacted with the fixed contact 18, the moving contact 17 is disconnected with the fixed contact 18, and the moving contact 17 is contacted with the second grounding contact 19, thereby realizing three states of opening, closing and grounding, enabling the switch main unit to have tristable, leading the residual electric arc in the ring main unit after opening to the ground, and improving the safety of the ring main unit.
Alternatively, as shown in fig. 5, 7 and 8, the pull rod driving device comprises a regulator 21, an armature 4 and a permanent magnet 5, wherein a hollow cavity is arranged on the permanent magnet 5, the armature 4 is arranged in the hollow cavity, the top of the armature 4 extends out of the permanent magnet 5, the top end of the armature 4 is connected with the regulator 21, the bottom is connected with the upper end of the pull rod 6, and the regulator 21 is used for regulating the direction of current in the armature 4 and the magnitude of current in the armature 4, so that the armature 4 drives the pull rod 6 to move up and down. Specifically, still include two mounting panels 2, two mounting panels 2 are all connected on cabinet body 1 roof, form the installation space between two mounting panels 2, and permanent magnet 5 sets up in the installation space. When the switch is used, the direction of current is regulated by the regulator 21, the armature 4 is subjected to downward acting force under the action of the permanent magnet 5, the pull rod 6 is driven to move downwards, the moving contact 17 is tightly contacted with the fixed contact 18, the first stable state is realized, namely, the switch is closed, the direction of current is regulated by the regulator 21, the current direction of the armature 4 is opposite, the armature 4 is subjected to upward acting force of the permanent magnet 5, the pull rod 6 is driven to move upwards, the moving contact 17 is separated from the fixed contact 18, the second stable state is realized, namely, the switch is opened, when the current flow is consistent with the second stable state through the regulator 21 and the current intensity is increased, the armature 4 is subjected to larger upward acting force of the permanent magnet 5, the distance that the armature 4 drives the pull rod 6 to move upwards is increased, and the moving contact 17 is tightly contacted with the second grounding contact 19, so that the third stable state is realized. The armature 4 is moved up and down through the permanent magnet 5, so that the pull rod 6 is driven to move up and down, mechanical opening and closing are not needed, the accuracy of opening and closing can be guaranteed, the safety and reliability of opening and closing processes can be improved, the accurate control of the armature 4 is realized by changing the direction and the intensity of current, the stability and the safety of the high-voltage switch device are improved, the structure is simple, the operation is simple and convenient, and the maintenance difficulty is low.
Alternatively, as shown in fig. 11, the permanent magnet 5 includes a housing, a movable iron core 51, a coil 52, a stationary iron core 53, and a plurality of magnetic steel sheets 54 disposed in the housing, wherein the movable iron core 51, the coil 52, and the stationary iron core 53 are disposed in sequence from top to bottom, and the magnetic steel sheets 54 are connected to an outer sidewall of the stationary iron core 53. Specifically, the coil 52 and the static iron core 53 are fixed on the inner side wall of the casing, the movable iron core 51, the coil 52 and the static iron core 53 are annular, stability and reliability of the permanent magnet 5 can be improved, the magnetic steel sheet 54 is in a circular arc shape, a plurality of magnetic steel sheets 54 are attached to the outer circumferential surface of the static iron core 53 at equal intervals, and magnetism of the permanent magnet 5 is enhanced through the magnetic steel sheets 54.
Optionally, as shown in fig. 12, the static contact 18 includes a static contact base 180, a compensating contact 182, and a compensating spring 183, where the static contact base 180 is provided with a groove 181, the compensating contact 182 and the compensating spring 183 are both disposed in the groove 181, the compensating contact 182 is located above the compensating spring 183, one end of the compensating spring 183 is connected to the bottom of the groove 181, the other end is connected to the compensating contact 182, and when the compensating spring 183 is in a natural state, the top of the compensating contact 182 is higher than the top of the Yu Jing contact base 180. When the movable contact 17 contacts the fixed contact 18, the compensation contact 182 is contacted first, so that the compensation spring 183 is compressed, the compensation contact 182 moves downwards relative to the groove 181, and when the top of the compensation contact 182 is flush with the fixed contact seat 180, the movable contact 17 is completely attached to the fixed contact 18, and closing is completed. Through compensation contact 182, compensation spring 183, avoid appearing the clearance between moving contact 17 and the static contact 18, make the combined floodgate more stable, simultaneously, can compensate moving contact 17, static contact 18 because the deformation that long-time contact produced to and moving contact 17, static contact 18 are at the clearance that contact surface high pressure oxidation produced, improve the life of looped netowrk cabinet.
Optionally, as shown in fig. 7 and 11, the pull rod driving device further includes an armature limiting assembly 3, the armature limiting assembly 3 includes a limiting cylinder 32, the limiting cylinder 32 is connected with the cabinet 1, the limiting cylinder 32 is vertically arranged, the limiting cylinder 32 is sleeved outside the armature 4, and the armature 4 is suitable for moving up and down relative to the limiting cylinder 32. The limiting cylinder 32 limits the armature 4 to avoid the armature from deviating from the vertical direction when moving up and down.
Optionally, the armature limiting assembly 3 further includes a transverse shaft 31 fixedly disposed at the top of the cabinet 1, and the limiting cylinders 32 are fixedly connected to the transverse shaft 31, and in this embodiment, three limiting cylinders 32 are sequentially disposed along the length direction of the transverse shaft 31. The top of the armature 4 is also provided with a limiting plate 41 for limiting the up-and-down movement of the armature 4 relative to the limiting cylinder 32.
Optionally, as shown in fig. 4, 5, 9 and 10, the grounding protection device further comprises a grounding protection device arranged in the cabinet body 1, wherein the grounding protection device comprises a grounding switch blade 9, a first grounding contact 10 and a grounding copper bar 11, the grounding copper bar 11 is grounded, the first grounding contact 10 is connected with the grounding copper bar 11, a bus is arranged in the cabinet body 1 and connected with the grounding switch blade 9, the grounding switch blade 9 is suitable for being connected with or disconnected from the first grounding contact 10, and the second grounding contact 19 is connected with the grounding switch blade 9 through a wire 20. In this embodiment, the grounding protection device is provided with three groups, three first grounding contacts 10 are sequentially arranged along the length direction of the grounding copper bar 11, the bus bars include an a-phase bus bar 12, a B-phase bus bar 13 and a C-phase bus bar 14, and the a-phase bus bar 12, the B-phase bus bar 13 and the C-phase bus bar 14 are respectively connected with one grounding switch blade 9. Because the second grounding contact 19 is electrically connected with the grounding switch blade 9, when the grounding switch blade 9 is connected with the first grounding contact 10, the second grounding contact 19 can be grounded through the first grounding contact 10, the electric arc remained in the ring main unit after the ring main unit is opened is led to the ground, the safety of the ring main unit is improved, meanwhile, when the ring main unit is not used or is in a transportation process, the grounding switch blade 9 is separated from the first grounding contact 10, the grounding switch blade 9 or the first grounding contact 10 is prevented from being damaged due to vibration, when the ring main unit is used, the grounding switch blade 9 is connected with the first grounding contact 10, the good contact effect of the grounding switch blade 9 and the first grounding contact 10 is ensured, and the service life of the ring main unit is prolonged.
Optionally, the grounding protection device further comprises a switch blade driving assembly, the switch blade driving assembly comprises a driving shaft 7, a crank arm 8 and a sliding sleeve 81, the driving shaft 7 is connected to the inner wall of the cabinet body 1, the crank arm 8 is arc-shaped, a supporting lug 71 is arranged on the driving shaft 7, one end of the crank arm 8 is hinged to the supporting lug 71, the other end of the crank arm is hinged to the sliding sleeve 81, the sliding sleeve 81 is sleeved on the grounding switch blade 9, the driving shaft 7 is rotated, and the driving shaft 7 drives the grounding switch blade 9 to rotate through the crank arm 8 so that the grounding switch blade 9 is connected with or disconnected from the first grounding contact 10. Specifically, the driving shaft 7 is a square shaft, and the driving shaft 7 is rotatably connected to the inner wall of the cabinet 1.
Optionally, the first ground contact 10 is L-shaped, one end of the ground switch blade 9 matching with the first ground contact 10 is a U-shaped connection end, and when the ground switch blade 9 is connected with the first ground contact 10, the U-shaped connection end is inserted on the first ground contact 10, so that the ground switch blade 9 and the first ground contact 10 are matched more tightly, the bonding effect is improved, and the stability of the switch is improved.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (9)
1. The utility model provides a looped netowrk cabinet with tristable permanent magnet mechanism, its characterized in that, including cabinet body (1), set up in pull rod (6), pull rod drive arrangement, moving contact (17), stationary contact (18), second ground contact (19), vacuum interrupter (16) in cabinet body (1), second ground contact (19) stationary contact (18) all are fixed in vacuum interrupter (16), stationary contact (18) are located moving contact (17) below, second ground contact (19) are located moving contact (17) top, pull rod (6) lower extreme stretches into in vacuum interrupter (16), moving contact (17) connect in pull rod (6) lower extreme, pull rod drive arrangement with pull rod (6) are connected, pull rod drive arrangement is used for driving pull rod (6) reciprocates, makes moving contact (17) with stationary contact (18) stationary contact, moving contact (17) with moving contact (18) and moving contact (18) disconnection, moving contact (18) with moving contact (18), moving contact (180) and compensating device (180) are included in moving contact (18), moving contact (18) compensating device (180) are including permanent magnet (182), be provided with recess (181) on static contact base (180), compensation contact (182) compensation spring (183) all set up in recess (181), compensation contact (182) are located compensation spring (183) top, compensation spring (183) one end connect in recess (181) bottom, the other end with compensation contact (182) are connected, compensation spring (183) are in when natural state compensation contact (182) top is higher than static contact base (180) top.
2. The ring main unit with the tristable permanent magnet mechanism according to claim 1, wherein a hollow cavity is formed in the permanent magnet (5), the armature (4) is arranged in the hollow cavity, the top of the armature (4) extends out of the permanent magnet (5), the regulator (21) is connected with the armature (4), the bottom of the armature (4) is connected with the upper end of the pull rod (6), and the regulator (21) is used for regulating the direction of current in the armature (4) and the magnitude of current in the armature (4), so that the armature (4) drives the pull rod (6) to move up and down.
3. The ring main unit with the tristable permanent magnetic mechanism according to claim 2, wherein the pull rod driving device further comprises an armature limiting assembly (3), the armature limiting assembly (3) comprises a limiting cylinder (32), the limiting cylinder (32) is connected with the cabinet body (1), the limiting cylinder (32) is vertically arranged, the limiting cylinder (32) is sleeved outside the armature (4), and the armature (4) is suitable for moving up and down relative to the limiting cylinder (32).
4. A ring main unit with a tristable permanent magnetic mechanism according to claim 3 characterized in that said armature limiting assembly (3) further comprises a transverse shaft (31) fixedly arranged at the top of said cabinet body (1), said limiting cylinder (32) being fixedly connected to said transverse shaft (31).
5. The ring main unit with the tristable permanent magnetic mechanism according to claim 4, wherein a limiting piece (41) is further arranged on the top of the armature (4).
6. The ring main unit with the tristable permanent magnetic mechanism according to claim 5, wherein the permanent magnet (5) comprises a shell, a movable iron core (51), a coil (52), a static iron core (53) and a plurality of magnetic steel sheets (54) which are arranged in the shell, the movable iron core (51), the coil (52) and the static iron core (53) are sequentially arranged from top to bottom, and the magnetic steel sheets (54) are connected to the outer side wall of the static iron core (53).
7. The ring main unit with the tristable permanent magnetic mechanism according to claim 6, further comprising a grounding protection device arranged in the cabinet body (1), wherein the grounding protection device comprises a grounding switch blade (9), a first grounding contact (10) and a grounding copper bar (11), the grounding copper bar (11) is grounded, the first grounding contact (10) is connected with the grounding copper bar (11), a bus is arranged in the cabinet body (1), the bus is connected with the grounding switch blade (9), the grounding switch blade (9) is suitable for being connected with or disconnected from the first grounding contact (10), and the second grounding contact (19) is connected with the grounding switch blade (9).
8. The ring main unit with the tristable permanent magnetic mechanism according to claim 7, wherein the grounding protection device further comprises a switch blade driving assembly, the switch blade driving assembly comprises a driving shaft (7), a crank arm (8) and a sliding sleeve (81), the driving shaft (7) is connected to the inner wall of the cabinet body (1), the crank arm (8) is arc-shaped, a supporting lug (71) is arranged on the driving shaft (7), one end of the crank arm (8) is hinged to the supporting lug (71), the other end of the crank arm is hinged to the sliding sleeve (81), the sliding sleeve (81) is sleeved on the grounding switch blade (9), the driving shaft (7) rotates, and the driving shaft (7) drives the grounding switch blade (9) to rotate through the crank arm (8) so that the grounding switch blade (9) is connected with or disconnected from the first grounding contact (10).
9. The ring main unit with the tristable permanent magnetic mechanism according to claim 8, wherein the first grounding contact (10) is L-shaped, one end of the grounding switch blade (9) matched with the first grounding contact (10) is a U-shaped connecting end, and when the grounding switch blade (9) is connected with the first grounding contact (10), the U-shaped connecting end is spliced on the first grounding contact (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510561975.XA CN120453102B (en) | 2025-04-30 | 2025-04-30 | Ring main unit with tristable permanent magnet mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510561975.XA CN120453102B (en) | 2025-04-30 | 2025-04-30 | Ring main unit with tristable permanent magnet mechanism |
Publications (2)
| Publication Number | Publication Date |
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| CN120453102A CN120453102A (en) | 2025-08-08 |
| CN120453102B true CN120453102B (en) | 2026-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202510561975.XA Active CN120453102B (en) | 2025-04-30 | 2025-04-30 | Ring main unit with tristable permanent magnet mechanism |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202034297U (en) * | 2011-03-14 | 2011-11-09 | 董岳向 | Outdoor high-pressure permanent-magnet vacuum circuit breaker |
| CN102738727A (en) * | 2012-06-26 | 2012-10-17 | 江苏帝一集团有限公司 | Miniature intelligent permanent magnet vacuum ring main unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983017A (en) * | 2012-11-27 | 2013-03-20 | 北京电研华源电力技术有限公司 | Three-position switch |
| CN210296215U (en) * | 2019-06-27 | 2020-04-10 | 瑞熙恩电气（珠海）有限公司 | Permanent Magnet Vacuum Circuit Breakers and Gas-filled Cabinets |
| CN216749788U (en) * | 2021-12-17 | 2022-06-14 | 昆山瑞普电气有限公司 | Contact spring built-in type permanent magnetic mechanism |
-
2025
- 2025-04-30 CN CN202510561975.XA patent/CN120453102B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202034297U (en) * | 2011-03-14 | 2011-11-09 | 董岳向 | Outdoor high-pressure permanent-magnet vacuum circuit breaker |
| CN102738727A (en) * | 2012-06-26 | 2012-10-17 | 江苏帝一集团有限公司 | Miniature intelligent permanent magnet vacuum ring main unit |
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| CN120453102A (en) | 2025-08-08 |
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Effective date of registration: 20251117 Address after: 100085 Beijing city Haidian District Third Street No. 9 D block 1111 Applicant after: BEIJING SOJO ELECTRIC Co.,Ltd. Country or region after: China Applicant after: Shuangjie Electric Hefei Co.,Ltd. Address before: 231121 east side of Fenglin Avenue, Xiatang Town, Changfeng County, Hefei City, Anhui Province Applicant before: Shuangjie Electric Hefei Co.,Ltd. Country or region before: China |
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