CN114429879A - Isolated static contact and three-station isolated grounding switch - Google Patents
Isolated static contact and three-station isolated grounding switch Download PDFInfo
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- CN114429879A CN114429879A CN202111547690.9A CN202111547690A CN114429879A CN 114429879 A CN114429879 A CN 114429879A CN 202111547690 A CN202111547690 A CN 202111547690A CN 114429879 A CN114429879 A CN 114429879A
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- 230000003068 static effect Effects 0.000 title claims abstract description 51
- 238000002955 isolation Methods 0.000 claims abstract description 35
- 238000009434 installation Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 10
- 238000002679 ablation Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000005452 bending Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 24
- 230000006872 improvement Effects 0.000 description 17
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/003—Earthing switches
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Abstract
The invention relates to an isolation static contact and a three-station isolation grounding switch. Keep apart the static contact and include along preceding perpendicular seat of front-back direction interval arrangement and the perpendicular seat in back, be equipped with respectively on two relative inside walls that erect the seat and electrically conduct and touch the finger, electrically conduct touch the finger and be used for electrically conductive contact with the moving contact, the right-hand member of two perpendicular seats is for supplying moving contact male to insert the end, is equipped with the striking piece respectively in insert end department on two perpendicular seats, and the striking piece has the segmental arc of left or right bending, and the segmental arc is used for contacting in order to realize the striking with the moving contact. In the process of bus conversion operation, before the moving contact is separated from the conductive contact finger of the isolation static contact, the current flows mainly through the conductive contact finger; after the moving contact is separated from the conductive contact finger, large current is led to the arc striking plate through the arc section, when the moving contact is separated from the arc section of the arc striking plate, the arc striking plate starts to strike, and the arc is ablated at the moment, so that the ablation of the arc to the conductive contact finger can be effectively reduced, and the service life of the isolated static contact is prolonged.
Description
Technical Field
The invention relates to a three-station isolating grounding switch, in particular to an isolating static contact of the three-station isolating grounding switch.
Background
Old station transformation, extension of electric wire netting transmission and transformation substation use HGIS switchgear more and more, and three-station switch that has the isolation ground function is HGIS equipment's important component, and it is higher and higher to its relevant technological parameter requirement.
At present, the design of a three-position isolation grounding switch at home and abroad mainly comprises two modes of linear motion and rotary motion of a moving contact. For example, the three-position isolating and grounding switch disclosed in chinese patent publication No. CN201629255U includes a moving contact, an isolating and grounding fixed contact, and the moving contact is driven by a rotating shaft to rotate. When the moving contact is in conductive contact with the isolating static contact, the isolating function is realized; when the moving contact is in conductive contact with the grounding fixed contact, the grounding function is realized; the switch is opened when the moving contact is not in contact with the isolation static contact and the grounding static contact. And the isolation static contact and the grounding static contact are both provided with conductive contact fingers for being in conductive contact with the moving contact.
The common isolating switch has bus conversion parameters of 10V and 1600A, but the bus conversion parameters of the isolating switch are improved along with the improvement of the product voltage grade and the requirement on compact product structure, and the latest requirement on the bus conversion parameters of 100V and 1600A means that the arc energy is higher, so that the arc is easy to ablate the conductive contact finger of the isolating static contact, and the service life of the isolating switch is influenced.
Disclosure of Invention
The invention aims to provide an isolated static contact, which aims to solve the technical problem that electric arcs are easy to ablate a conductive contact finger of the isolated static contact when the electric arc energy is higher in the prior art; the invention also aims to provide a three-station isolating grounding switch using the isolating static contact.
In order to achieve the above purpose, the technical scheme of the invention for isolating the static contact is as follows:
keep apart the static contact, including the preceding perpendicular seat of following back and forth direction interval arrangement and the perpendicular seat of back, be equipped with respectively on the relative inside wall of two perpendicular seats and electrically conduct and touch the finger, electrically conduct touch the finger and be used for with moving contact conductive contact, the right-hand member of two perpendicular seats is for supplying moving contact male to insert the end, is equipped with the striking respectively in inserting end department on two perpendicular seats, the striking has the segmental arc of left or right bending, the segmental arc is used for contacting in order to realize the striking with the moving contact.
The beneficial effects are that: in the process of bus conversion operation, before the moving contact is separated from the conductive contact finger of the isolation static contact, the current flows mainly through the conductive contact finger; after the moving contact is separated from the conductive contact finger, large current is led to the arc striking plate through the arc section, when the moving contact is separated from the arc section of the arc striking plate, the arc striking plate starts to strike, and the arc is ablated at the moment, so that the ablation of the arc to the conductive contact finger can be effectively reduced, and the service life of the isolated static contact is prolonged.
As a further improvement, the arc-shaped segment is arranged at the end part of the arc ignition sheet.
The beneficial effects are that: the design is not only beneficial to the processing of the arc-shaped section, but also beneficial to the stress deformation of the arc-shaped section.
As a further improvement, the arc striking sheet comprises a plurality of arc striking contact fingers which are arranged at intervals up and down, and the arc striking contact fingers are provided with the arc sections.
The beneficial effects are that: the design is not only beneficial to the deformation of the arc-shaped section, but also beneficial to the heat dissipation of the arc-shaped section.
As a further improvement, two arc striking sheets are respectively arranged on the two vertical seats, and the two arc striking sheets on the same vertical seat are arranged in the left-right direction.
The beneficial effects are that: by means of the design, the current capacity can be increased.
As a further improvement, the arc sections of the two arc striking sheets are bent in opposite directions.
The novel moving contact has the beneficial effects that by the design, the installation space is saved, and the moving contact can be conveniently inserted and pulled out.
As a further improvement, the arc striking pieces are fixed on the corresponding vertical seats through screws.
The beneficial effects are that: by the design, the arc striking piece is convenient to fix, good in stability and convenient to disassemble, assemble and replace at the later stage.
As a further improvement, the two vertical seats respectively comprise a base and a shielding block fixed on the base through screws, and the shielding block is an arc-resistant block resistant to arc ablation.
The beneficial effects are that: by the design, the shielding block can effectively avoid the surface of the shielding block from being ablated into uneven spots by electric arcs, and an electric field can be effectively optimized.
As a further improvement, a positioning structure for positioning the shielding block is arranged on the base.
The beneficial effects are that: by the design, the position accuracy of the shielding block can be ensured.
As a further improvement, the arc striking piece is of a Z-shaped structure, the arc striking piece comprises a fixed section, an overhanging section and a connecting section, the connecting section is connected between the fixed section and the overhanging section, and the arc section is arranged on the overhanging section; the base is provided with a step block, and the step block is provided with a first fixed vertical face facing to the right, a second fixed vertical face back to the conductive contact finger and a fixed plane facing to the upper direction; the shielding block comprises a top cover part buckled on the fixed plane, a first enclosing part positioned on the right side of the first fixed vertical face and a second enclosing part buckled on the second fixed vertical face; the shielding block and the step block enclose an installation space for installing the arc striking plate, and the fixed section is fixed on the first fixed vertical face through a screw.
In order to achieve the purpose, the technical scheme of the three-position isolation grounding switch is as follows:
three-station isolation grounding switch comprises a shell, wherein a moving contact, an isolation static contact and a grounding static contact are arranged in the shell, the isolation static contact comprises a front vertical seat and a rear vertical seat which are arranged at intervals along the front-rear direction, conductive contact fingers are respectively arranged on the relative inner side walls of the two vertical seats, the conductive contact fingers are used for being in conductive contact with the moving contact, the right ends of the two vertical seats are insertion ends for inserting the moving contact, arc striking plates are respectively arranged at the insertion ends of the two vertical seats, each arc striking plate is provided with an arc-shaped section bent leftwards or rightwards, and the arc-shaped sections are used for being in contact with the moving contact to achieve arc striking.
The beneficial effects are that: in the process of bus conversion operation, before the moving contact is separated from the conductive contact finger of the isolation static contact, the current flows mainly through the conductive contact finger; after the moving contact is separated from the conductive contact finger, large current is led to the arc striking plate through the arc section, when the moving contact is separated from the arc section of the arc striking plate, the arc striking plate starts to strike, and the arc is ablated at the moment, so that the ablation of the arc to the conductive contact finger can be effectively reduced, and the service life of the isolated static contact is prolonged.
As a further improvement, the arc-shaped segment is arranged at the end part of the arc ignition sheet.
The beneficial effects are that: the design is not only beneficial to the processing of the arc-shaped section, but also beneficial to the stress deformation of the arc-shaped section.
As a further improvement, the arc striking sheet comprises a plurality of arc striking contact fingers which are arranged at intervals up and down, and the arc striking contact fingers are provided with the arc sections.
The beneficial effects are that: the design is not only beneficial to the deformation of the arc-shaped section, but also beneficial to the heat dissipation of the arc-shaped section.
As a further improvement, two arc striking sheets are respectively arranged on the two vertical seats, and the two arc striking sheets on the same vertical seat are arranged in the left-right direction.
The beneficial effects are that: by means of the design, the current capacity can be increased.
As a further improvement, the arc sections of the two arc striking sheets are bent in opposite directions.
The novel moving contact has the beneficial effects that by the design, the installation space is saved, and the moving contact can be conveniently inserted and pulled out.
As a further improvement, the arc striking pieces are fixed on the corresponding vertical seats through screws.
The beneficial effects are that: by the design, the arc striking piece is convenient to fix, good in stability and convenient to disassemble, assemble and replace at the later stage.
As a further improvement, the two vertical seats respectively comprise a base and a shielding block fixed on the base through screws, and the shielding block is an arc-resistant block resistant to arc ablation.
The beneficial effects are that: by the design, the shielding block can effectively avoid the surface of the shielding block from being ablated into uneven spots by electric arcs, and an electric field can be effectively optimized.
As a further improvement, a positioning structure for positioning the shielding block is arranged on the base.
The beneficial effects are that: by the design, the position accuracy of the shielding block can be ensured.
As a further improvement, the arc striking piece is of a Z-shaped structure, the arc striking piece comprises a fixed section, an overhanging section and a connecting section, the connecting section is connected between the fixed section and the overhanging section, and the arc section is arranged on the overhanging section; the base is provided with a step block, and the step block is provided with a first fixed vertical face facing to the right, a second fixed vertical face back to the conductive contact finger and a fixed plane facing to the upper direction; the shielding block comprises a top cover part buckled on the fixed plane, a first enclosing part positioned on the right side of the first fixed vertical face and a second enclosing part buckled on the second fixed vertical face; the shielding block and the step block enclose an installation space for installing the arc striking plate, and the fixed section is fixed on the first fixed vertical face through a screw.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a three-position isolation grounding switch of the present invention;
fig. 2 is a top view of the isolation stationary contact of fig. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic diagram of the structure of FIG. 3 with the shielding block removed;
FIG. 5 is a schematic view of the watch band of FIG. 4 with the finger and tab removed;
FIG. 6 is a schematic structural view of the arc runner of FIG. 4;
FIG. 7 is a schematic diagram of the structure of the shielding block of FIG. 3;
in the figure: 11. a housing; 12. a movable support; 13. a grounding static contact; 14. a moving contact; 15. isolating the static contact; 16. a base; 17. a first screw; 18. a conductive contact finger; 19. a second screw; 20. a shielding block; 21. an arc-shaped section; 22. a step block; 23. a first fixed facade; 24. a third screw; 25. an arc striking sheet; 26. positioning pins; 27. a first threaded hole; 28. a second threaded hole; 29. a third threaded hole; 30. a first pin hole; 31. a fixed section; 32. a connecting section; 33. a cantilever section; 34. a third through hole; 35. a second through hole; 36. a first through hole; 37. a second pin hole; 38. a fourth screw; 39. a fifth screw; 40. a cap portion; 41. a first enclosing portion; 42. a second enclosure portion.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …," or the like, does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "front", "back", "upper", "lower", "left" and "right" are based on the orientations and positional relationships shown in the drawings and are only for convenience in describing the present invention, but do not indicate that the referred device or component must have a specific orientation, and thus, should not be construed as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
Embodiment 1 of the three-position isolating grounding switch of the invention:
as shown in fig. 1, the three-position isolation grounding switch includes a housing 11, a movable support 12 is disposed in the housing 11, the movable support 12 extends in a vertical direction, an upper end of the movable support 12 is fixed at a top of the housing 11, and a lower end of the movable support 12 is connected with a movable contact 14. And a grounding static contact 13 and an isolating static contact 15 are also arranged in the shell, the grounding static contact 13 is positioned on the right side of the movable support 12, and the isolating static contact 15 is positioned below the movable support 12. The moving contact 14 is driven to rotate by an insulating torsion bar to realize conductive contact with the isolating fixed contact 15 or the grounding fixed contact 13, so that the isolating and grounding functions are realized.
The direction of the movable contact 14 inserted into the isolated stationary contact 15 is the left-right direction. As shown in fig. 2 and 3, the isolated stationary contact 15 includes a front vertical seat and a rear vertical seat spaced apart from each other in the front-rear direction, the opposite inner side walls of the two vertical seats are respectively provided with a conductive contact finger 18, the conductive contact finger 18 is used for making conductive contact with the movable contact 14, preferably, both the two vertical seats are processed with watchband contact finger installation grooves, and the conductive contact finger 18 is a watchband contact finger. Wherein, two watchband contact fingers are arranged on each vertical seat at intervals along the left-right direction, the number of the watchband contact fingers is 62, and the theoretical through flow reaches 4680A.
In this embodiment, the front stem and the rear stem are detachably and fixedly connected together by a fourth screw 38, so as to facilitate the processing of the watch band contact finger mounting groove. Wherein, the front vertical seat and the rear vertical seat have the same structure and are symmetrically arranged. The front vertical seat and the rear vertical seat are fixedly connected together to form an isolation static contact 15, and the isolation static contact 15 is fixed on other conductors in the shell 11 through a fifth screw 39.
In this embodiment, the right ends of the two vertical seats are insertion ends into which the movable contact 14 is inserted, the insertion ends of the two vertical seats are respectively provided with an arc striking plate 25, the arc striking plate 25 is provided with an arc section 21, and the arc section 21 is used for contacting with the movable contact 14 to realize arc striking, so as to disperse arc energy. Wherein the arc segment 21 is arranged at the end position of the arc runner 25.
Taking the rear vertical seat as an example, as shown in fig. 3 and 5, the rear vertical seat includes a base 16 and a shielding block 20, and the shielding block 20 and the step block 22 enclose an installation space for installing the arc runner 25, and the installation space is Z-shaped. The base 16 is provided with a step block 22, and the step block 22 is provided with a first fixed vertical surface 23 facing right, a second fixed vertical surface facing back and a fixed plane facing upward; two third threaded holes 29 are formed in the first fixing vertical surface 23; as shown in fig. 4 and 6, the arc ignition piece 25 is a Z-shaped structure, the arc ignition piece 25 includes a fixing section 31, an overhanging section 33 and a connecting section 32, the connecting section 32 is connected between the fixing section 31 and the overhanging section 33, two third through holes 34 are provided on the fixing section 31, the third through holes 34 are in one-to-one correspondence with the third threaded holes 29, and the arc ignition piece 25 is fixed on the first fixing vertical surface 23 of the step block 22 through the third screws 24. Wherein the arc segment 21 is arranged on the overhanging segment 33.
As shown in fig. 3 and 4, the striking plate 25 includes a plurality of striking fingers spaced above and below, and the striking fingers have the arc segments 21 described above. This configuration facilitates not only the deformation of the arc segment 21, but also the heat dissipation of the arc segment 21.
In this embodiment, the rear vertical seat is provided with two arc striking pieces 25, and the two arc striking pieces 25 are arranged in the left-right direction to increase the through-current capacity. The arc-shaped section of the left arc piece 25 is bent leftwards, and the arc-shaped section 21 of the right arc piece 25 is bent rightwards, so that the installation space is saved, and the moving contact 14 is conveniently inserted into the isolation static contact 15 and the moving contact 14 is separated from the isolation static contact 15.
In this embodiment, the fixed sections of the two arc ignition pieces 25 are closely arranged, and gaps are left between the connection sections 32 and between the overhanging sections 33 of the two arc ignition pieces 25, so that the arc ignition contact fingers are deformed when receiving the acting force of the movable contact 14.
As shown in fig. 3, 4 and 7, the second fixing vertical surface is provided with a first threaded hole 27, and the fixing plane is provided with a second threaded hole 28. The shielding block 20 comprises a top cover part 40 buckled on a fixed plane, a first enclosing part 41 positioned on the right side of the first fixed vertical surface 23 and a second enclosing part 42 buckled on the second fixed vertical surface, wherein a second through hole 35 is formed in the top cover part, a first through hole 36 is formed in the second enclosing part, the first through hole 36 corresponds to the first threaded hole 27, the second through hole 35 corresponds to the second threaded hole 28, and the shielding block 20 is fixed on the step block 22 through a first screw 17 and a second screw 19. Wherein, the first enclosing part 41 is provided with an avoiding groove for avoiding the head of the third screw 24.
In this embodiment, the shielding block 20 is made of CuW, so that the surface of the shielding block can be effectively prevented from being ablated into uneven spots by electric arc, and the electric field can be effectively optimized.
In this embodiment, the base 16 is provided with a first pin hole 30, and the positioning pin 26 is installed in the first pin hole 30; second pin holes 37 are formed in the first enclosing part 41, and the second pin holes 37 are in positioning fit with the positioning pins 26 to ensure the position accuracy of the shielding block 20. Wherein the positioning pin 26 constitutes the positioning structure.
As shown in fig. 2, the shielding block 20 is provided with an avoiding hole for avoiding a bolt head of the third screw 24.
In this embodiment, the arc striking plate 25 is formed by cutting a 2mm CuW plate into a plurality of grids at the connecting section 32 and the overhanging section 33 and then integrally bending the grids. Therefore, the elasticity of the arc striking piece 25 is enhanced, the arc energy can be dispersed, the heat dissipation is facilitated, and the conductive contact finger 18 is protected due to the ablation resistance.
In the process of bus switching operation, before the moving contact 14 is separated from the conductive contact finger 18 of the isolation static contact 15, the current mainly flows through the conductive contact finger 18, after the moving contact 14 is separated from the conductive contact finger 18, a large current is led to the arc striking piece 25, when the moving contact 14 is separated from the arc section 21 of the arc striking piece 25, the arc starts to strike, the arc is ablated by the arc striking piece at the moment, and the arc striking piece is high-temperature resistant in material, so that the ablation of the arc to the conductive contact finger can be effectively reduced.
According to the three-station isolation grounding switch, the arc striking sheet is arranged on the isolation static contact, so that the arc ablation resistance of the isolation static contact is improved, the bus conversion parameters are met, and the service life is prolonged.
Embodiment 2 of the three-position isolation grounding switch of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the arc ignition piece is in a Z-shaped structure, and the arc segment is arranged at the end of the arc ignition piece. In this embodiment, the arc ignition piece is of a n-shaped structure, and the arc segment is arranged in the middle of the arc ignition piece.
Embodiment 3 of the three-position isolating grounding switch of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, two arc striking sheets are respectively disposed on two vertical bases, and the two arc striking sheets on the same vertical base are arranged in the left-right direction. In this embodiment, two vertical seats are respectively provided with an arc striking plate.
Embodiment 4 of the three-position isolating grounding switch of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the bending directions of the arc segments of the two arc ignition sheets are opposite, that is, the arc segment of the left arc ignition sheet is bent to the left, and the arc segment of the right arc ignition sheet is bent to the right. In this embodiment, the arc segments of the two arc striking pieces are bent in the same direction, that is, the arc segments of the two arc striking pieces are bent leftward or the arc segments of the two arc striking pieces are bent rightward.
Embodiment 5 of the three-position isolation grounding switch of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the arc striking plate is fixed on the corresponding vertical seat by a screw. In this embodiment, the arc striking plate is press-fitted on the corresponding vertical seat through the shielding block.
In the embodiment of the isolation static contact according to the present invention, the isolation static contact in the embodiment has the same structure as that of any one of the isolation static contacts in embodiments 1 to 5 of the three-station isolation grounding switch, and details are not repeated herein.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (10)
1. Keep apart static contact (15), including the preceding perpendicular seat of arranging along preceding back direction interval and the perpendicular seat of back, be equipped with respectively on the relative inside wall of two perpendicular seats electrically conductive touch indicate (18), electrically conductive touch indicate (18) and be used for with moving contact (14) conductive contact, the right-hand member of two perpendicular seats is for supplying moving contact (14) male insertion end, a serial communication port, be equipped with striking piece (25) respectively in insertion end department on two perpendicular seats, striking piece (25) have left or right crooked segmental arc (21), segmental arc (21) are used for contacting in order to realize the striking with moving contact (14).
2. The isolated static contact (15) according to claim 1, wherein the arc-shaped segment (21) is arranged at the end of an arc ignition piece (25).
3. The isolated static contact (15) according to claim 1 or 2, wherein the arc striking plate (25) comprises a plurality of arc striking contact fingers arranged at intervals up and down, and the arc striking contact fingers are provided with the arc-shaped sections (21).
4. The isolated static contact (15) according to claim 1 or 2, wherein two arc striking plates (25) are respectively disposed on two vertical bases, and the two arc striking plates (25) on the same vertical base are arranged in the left-right direction.
5. An isolated static contact (15) according to claim 4, wherein the arc segments (21) of the two arc ignition pieces (25) are bent in opposite directions.
6. Stationary isolated contact (15) according to claim 1 or 2, wherein said arc runner (25) is fixed to the corresponding vertical seat by means of screws.
7. Isolated stationary contact (15) according to claim 1 or 2, wherein the two uprights each comprise a base (16) and a shielding block (20) fixed to the base (16) by means of screws.
8. The isolated stationary contact (15) as claimed in claim 7, wherein the base (16) is provided with a positioning structure for positioning the shielding block (20).
9. The isolated static contact (15) according to claim 7, wherein the arc starting piece (25) is a Z-shaped structure, the arc starting piece (25) comprises a fixed section (31), an overhanging section (33) and a connecting section (32), the connecting section (32) is connected between the fixed section (31) and the overhanging section (33), and the arc section (21) is arranged on the overhanging section (33); the base (16) is provided with a step block (22), and the step block (22) is provided with a first fixed vertical surface (23) facing to the right, a second fixed vertical surface facing away from the conductive contact finger (18) and an upward fixed plane; the shielding block (20) comprises a top cover part (40) buckled on the fixed plane, a first enclosing part (41) positioned on the right side of the first fixed vertical surface (23) and a second enclosing part (42) buckled on the second fixed vertical surface; the shielding block (20) and the step block (22) enclose an installation space for installing the arc striking plate, and the fixing section (31) is fixed on the first fixing vertical surface (23) through a screw.
10. Three-station isolation grounding switch comprises a shell (11), wherein a movable contact (14), an isolation static contact (15) and a grounding static contact (13) are arranged in the shell (11), and the three-station isolation grounding switch is characterized in that the isolation static contact (15) is the isolation static contact (15) in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547690.9A CN114429879B (en) | 2021-12-16 | 2021-12-16 | Isolation static contact and three-station isolation grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547690.9A CN114429879B (en) | 2021-12-16 | 2021-12-16 | Isolation static contact and three-station isolation grounding switch |
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| Publication Number | Publication Date |
|---|---|
| CN114429879A true CN114429879A (en) | 2022-05-03 |
| CN114429879B CN114429879B (en) | 2024-03-22 |
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| CN202111547690.9A Active CN114429879B (en) | 2021-12-16 | 2021-12-16 | Isolation static contact and three-station isolation grounding switch |
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