CN112701005A - Combined electric connection and isolation grounding switch using same - Google Patents
Combined electric connection and isolation grounding switch using same Download PDFInfo
- Publication number
- CN112701005A CN112701005A CN202011419574.4A CN202011419574A CN112701005A CN 112701005 A CN112701005 A CN 112701005A CN 202011419574 A CN202011419574 A CN 202011419574A CN 112701005 A CN112701005 A CN 112701005A
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- arc contact
- base
- grounding
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- 238000002955 isolation Methods 0.000 title claims abstract description 37
- 230000003068 static effect Effects 0.000 claims abstract description 44
- 238000009434 installation Methods 0.000 claims abstract description 18
- 239000012212 insulator Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 230000000717 retained effect Effects 0.000 claims 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The invention relates to the field of high-voltage switches, in particular to a combined electric connection and an isolation grounding switch using the same. The combination formula electric connection includes quiet end contact base, keeps apart quiet arc contact and the quiet arc contact of ground connection, be equipped with insulating part connecting portion and arc contact installation department on the quiet end contact base, insulating part connecting portion are used for being connected with isolation earthing switch's corresponding support insulating part, be equipped with the pedestal mounting hole on the arc contact installation department, fixed being equipped with the arc contact base in the pedestal mounting hole, keep apart quiet arc contact and the sharing of the quiet arc contact of ground connection the arc contact base is installed in quiet end contact base. Compared with the structure that the isolation static arc contact and the grounding static arc contact are respectively installed through independent bases in the prior art, the structure can omit the original grounding static arc contact and the base of the isolation static arc contact, thereby reducing the number of parts and solving the problems of low assembly efficiency and inconvenient part management of the isolation grounding switch.
Description
Technical Field
The invention relates to the field of high-voltage switches, in particular to a combined electric connection and an isolation grounding switch using the same.
Background
The electrical connection plays a very critical role in gas-insulated metal-enclosed switchgear as a connecting element for connecting the individual conductive units. In a double grounded isolation grounding switch, the electrical connection carries both the conductive connection of the main circuit and the conductive connection of the ground circuit. When the main loop normally runs, the electric connection is responsible for communicating loops at two sides of the isolating switch; when the main circuit fails, the electrical connection is responsible for leading the fault current to the earth grid through the fast grounding switch.
Among the prior art, the electric connection in the earthing switch is kept apart to two earthing is combination formula electric connection, including quiet end contact base, keep apart quiet main contact, keep apart quiet arc contact, quiet main contact of ground connection and quiet arc contact of ground connection, wherein keep apart quiet arc contact and quiet arc contact of ground connection and all be through respective base fixed mounting on quiet end contact base, this leads to spare part quantity more in the production process, has increased the cost on the one hand, has reduced assembly efficiency, and on the other hand has also brought certain degree of difficulty for the management of spare part.
Disclosure of Invention
The invention aims to provide a combined electric connection to solve the problems of low assembly efficiency and inconvenient part management of an isolation grounding switch.
Meanwhile, the invention also aims to provide the isolating grounding switch using the combined type electric connection.
The combined electric connection adopts the following technical scheme: combination formula electric connection, including quiet end contact base, isolation quiet arc contact and the quiet arc contact of ground connection, be equipped with insulating part connecting portion and arc contact installation department on the quiet end contact base, insulating part connecting portion are used for being connected with isolation earthing switch's corresponding support insulating part, be equipped with the pedestal mounting hole on the arc contact installation department, fixed being equipped with arc contact base in the pedestal mounting hole, keep apart quiet arc contact and the sharing of the quiet arc contact of ground connection the arc contact base is installed in quiet end contact base.
Has the advantages that: in the combined electric connection, the arc contact mounting part is provided with a base mounting hole, an arc contact base is fixedly assembled in the base mounting hole, and the isolation static arc contact and the grounding static arc contact share the arc contact base and are mounted on the static end contact base. Compared with the structure that the isolation static arc contact and the grounding static arc contact are respectively installed through independent bases in the prior art, the structure can omit the original grounding static arc contact and the base of the isolation static arc contact, thereby reducing the number of parts and solving the problems of low assembly efficiency and inconvenient part management of the isolation grounding switch.
Furthermore, the arc contact base is provided with a flange connection structure, and is fixedly connected with the isolation static arc contact through the flange connection structure. The arc contact base is fixedly connected with the arc contact base through the flange connection structure, so that the arc contact base has the advantage of convenience in operation, and the assembly efficiency of the isolation grounding switch is improved.
Further, the isolation stationary arc contact is fixedly connected with the arc contact base through a threaded fastener. The threaded fastener has the advantages of convenience in operation and low cost.
Further, the grounded static arc contact is fixedly assembled on the arc contact base through threads. The grounding static arc contact is directly and fixedly assembled on the arc contact base through threads, and the assembly efficiency of the grounding static arc contact can be further improved.
Furthermore, the grounding static arc contact is assembled on the arc contact base through a thread of a threaded hole formed in the arc contact base, a contact finger installation part surrounding the threaded hole is arranged on the arc contact base, and a grounding contact finger of the grounding static main contact is installed on the contact finger installation part. The contact finger installation part is arranged on the arc contact base, the grounding contact finger is installed on the contact finger installation part, the structure of combined type electric connection can be further simplified, and the number of parts is reduced.
Furthermore, the contact finger mounting part is a contact finger mounting sleeve arranged on the arc contact base. The contact finger mounting sleeve is convenient to process, and the mounting of the grounding contact finger is realized by a simpler structure.
Furthermore, a first insulating part is arranged between one end of the grounding contact finger close to the disposal installation part and the static end contact seat. After the grounding contact finger is installed, if the grounding contact finger is reliably contacted with the arc contact base, the grounding contact finger and the arc contact base have no problem in conductive contact, but in the assembling and using processes, the reliable contact between the grounding contact finger and the arc contact base is difficult to guarantee under the actual condition, and once the grounding contact finger and the arc contact base are contacted without forming the reliable contact, the problem of local resistance increase is easily caused.
Furthermore, one side of the static end contact seat, which is close to the grounding static arc contact, is provided with a shielding cover, and the inner edge of the shielding cover is limited to one end of the grounding contact finger, which is far away from the arc contact base. The shielding case limits the corresponding end of the grounding contact finger, and the grounding contact finger can be more reliably installed under the condition of not increasing parts.
Furthermore, a second insulating part is arranged between one end of the grounding contact finger, which is close to the shielding case, and the grounding contact finger is limited through the second insulating part.
The isolation grounding switch adopts the following technical scheme: isolation earthing switch, including the casing and through supporting the electric connection of insulating part fixed mounting in the casing, the electric connection includes quiet end contact base, keeps apart quiet arc contact and the quiet arc contact of ground connection, be equipped with insulating part connecting portion and arc contact installation department on the quiet end contact base, insulating part connecting portion are used for being connected with isolation earthing switch's corresponding support insulating part, be equipped with the pedestal mounting hole on the arc contact installation department, fixed being equipped with arc contact base in the pedestal mounting hole, keep apart quiet arc contact and the quiet arc contact sharing of ground connection arc contact base is and install in quiet end contact base.
Furthermore, the arc contact base is provided with a flange connection structure, and is fixedly connected with the isolation static arc contact through the flange connection structure.
Further, the isolation stationary arc contact is fixedly connected with the arc contact base through a threaded fastener.
Further, the grounded static arc contact is fixedly assembled on the arc contact base through threads.
Furthermore, the grounding static arc contact is assembled on the arc contact base through a thread of a threaded hole formed in the arc contact base, a contact finger installation part surrounding the threaded hole is arranged on the arc contact base, and a grounding contact finger of the grounding static main contact is installed on the contact finger installation part.
Furthermore, the contact finger mounting part is a contact finger mounting sleeve arranged on the arc contact base.
Furthermore, a first insulating part is arranged between one end of the grounding contact finger close to the disposal installation part and the static end contact seat.
Furthermore, one side of the static end contact seat, which is close to the grounding static arc contact, is provided with a shielding cover, and the inner edge of the shielding cover is limited to one end of the grounding contact finger, which is far away from the arc contact base.
Furthermore, a second insulating part is arranged between one end of the grounding contact finger, which is close to the shielding case, and the grounding contact finger is limited through the second insulating part.
The technical scheme of the isolation grounding switch has the advantages that the combined electrical connection is adopted, so that the beneficial effects of the technical scheme of the combined electrical connection can be referred to, and the detailed description is omitted.
For the subject to be protected by the present patent, each preferred technical solution under the same subject may be adopted alone, and when the preferred technical solutions under the same subject can be combined, two or more preferred technical solutions under the same subject may be arbitrarily combined, and the technical solutions formed by the combination are not specifically described here, and are included in the description of the present patent in this form.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a modular electrical coupling of the present invention;
fig. 2 is a use state diagram of the combined electric link of the invention, and is a structural schematic diagram of an embodiment of the isolating grounding switch of the invention.
The names of the components corresponding to the corresponding reference numerals in the drawings are: 101. a stationary end contact base; 11. an insulating member connecting portion; 12. an arcing contact mounting portion; 13. an isolated contact finger mounting section; 14. hand hole; 102. an arc contact base; 21. a flange; 22. a grounding contact finger mounting sleeve; 103. isolating the stationary arc contact; 104. a grounded static arc contact; 105. a support insulator; 106. isolating the contact fingers; 107. a hold-down bolt; 108. a grounding contact finger; 109. a first insulating member; 110. a shield case; 111. a second insulating member.
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 in the embodiments of the present invention, are 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, the terms "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, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The combined electric connection embodiment of the invention comprises the following steps:
as shown in fig. 1-2, the combined electrical coupling includes a stationary contact base 101, an arcing contact base 102, an isolating stationary arcing contact 103, and a grounding stationary arcing contact 104.
The stationary contact 101 includes an insulator connecting portion 11, an arcing contact mounting portion 12, and an isolating contact finger mounting portion 13. The insulator connecting portion 11 is used to be fixedly connected with the supporting insulator 105 of the isolation grounding switch, for example, in fig. 2, the supporting insulator 105 of the isolation grounding switch is specifically a basin insulator, and the insulator connecting portion 11 has a substantially cylindrical overall shape, and a through hole is provided at an end thereof for being fixedly connected with the supporting insulator 105 of the isolation grounding switch. The arc contact mounting portion 12 is plate-shaped and located at one end of the insulator connecting portion 11, and a base mounting hole is provided thereon for mounting the arc contact base 102, and in this embodiment, a fitting hole is provided on the arc contact mounting portion 12 around the arc contact mounting hole for fitting with the pressure bolt 107 to fix the arc contact base 102 to the arc contact mounting portion 12. The isolating contact finger mounting part 13 is located on one side of the arcing contact mounting part 12, and is formed in a cylindrical shape, and an annular groove is formed in the inner wall of the isolating contact finger mounting part for mounting the isolating contact finger 106. In order to facilitate the installation operation of the corresponding internal components, the stationary contact 101 is further provided with a hand hole 14. The stationary contact 101 is formed integrally by casting.
The arcing contact base 102 is made of metal and has a conductive characteristic. The arc contact base 102 is provided with a first connection structure, a second connection structure, and a third connection structure, respectively. The first connecting structure is used for fixedly matching with the arc contact installation part 12 of the static end contact seat 101, the second connecting structure is used for installing the isolation static arc contact 103, and the third connecting structure is used for installing the grounding static arc contact 104. After the arc contact base 102 is adopted, the connection with the static end contact base 101, the isolation static arc contact 103 and the grounding static arc contact 104 of the isolation grounding switch can be realized through one part, compared with the prior art, the number of parts of the isolation grounding switch can be reduced, and the material cost and the part management cost are reduced.
In the present embodiment, the cross section of the arc contact base 102 is circular, and as shown in fig. 1, the first connecting structure is a flange connecting structure provided between both axial (left and right) ends of the arc contact base 102 with respect to the orientation shown in fig. 1, specifically, a flange 21 protruding outward in the radial direction is provided between both left and right ends of the arc contact base 102, and the flange connecting structure is formed by providing bolt holes on the flange 21. The second connecting structure is arranged on the right end face of the arc contact base 102, and specifically adopts a connecting hole, in the embodiment, the connecting hole specifically adopts a threaded hole, and when in use, the isolating static arc contact 103 of the isolating grounding switch can be fixed on the arc contact base 102 through the hold-down bolt 107. The third connection structure is disposed on the left end face of the arcing contact base 102, such that the second connection structure and the third connection structure are distributed on opposite sides of the arcing contact base 102; in this embodiment, the third connecting structure is specifically a threaded hole, and the grounded static arcing contact 104 can be installed by matching with the external thread at the tail of the grounded static arcing contact 104 when in use. When the isolating static arc contact 103 and the grounding static arc contact 104 are installed, the center line of the flange connection structure is collinear with the plugging center line of the isolating static arc contact 103 and the plugging center line of the grounding static arc contact 104. Of course, in other embodiments, the center line of the flange connection structure may be set to have a certain angle with the plugging center line of the isolating static arc contact 103 and the plugging center line of the grounding static arc contact 104 before.
In order to enable the arcing contact base 102 to have the function of installing the grounding contact finger 108 and further simplify the structure of the isolation grounding switch, a grounding contact finger installing sleeve 22 is further arranged on the arcing contact base 102 around the threaded hole, and the grounding contact finger installing sleeve 22 and the threaded hole are coaxially arranged. In use, the grounding contact fingers 108 (petal-shaped contact fingers) can be mounted on the grounding contact finger mounting sleeve 22 through the spring band, so as to mount the grounding contact fingers 108. In order to avoid unstable contact between the right end of the ground contact finger 108 and the arcing contact base 102, the arcing contact base 102 is provided with a support surface at the root of the ground contact finger mounting sleeve 22, which support surface is used to support the first insulating member 109 (insulating pad) to completely isolate the right end of the ground contact finger 108 from the arcing contact base 102.
Figure 2 shows the use of the modular electrical link of the invention (the arc contact base 102 is encircled in dashed lines). As shown in fig. 2, when using the combined electrical connection, the arc contact base can be fixedly mounted on the arc contact mounting portion 12 of the stationary contact base of the isolated ground switch by the first connection structure, the isolated stationary arc contact 103 is mounted on the arc contact base 102 by the second connection structure, the grounded stationary arc contact 104 is mounted on the arc contact base 102 by the third connection structure, one end of the grounded contact finger 108 is mounted on the grounded contact finger mounting sleeve 22, the stationary electrical connection is a split structure, and a shielding cover 110 is disposed at an end close to the grounded contact finger 108, in this embodiment, the shielding cover 110 is connected with the stationary contact base 101 by a screw thread, while connecting, the other end of the grounded contact finger 108 is positioned by the second insulating member 111, the position maintaining pad is made of an insulating material, which can prevent the problem of bad left end contact between the stationary electrical connection and the grounded contact finger 108, the principle of the first insulating member 109 is the same as that of the first insulating member 109, and is not described herein again.
The embodiment of the isolation grounding switch of the invention comprises the following steps:
as shown in fig. 1-2, the isolation grounding switch includes a housing and an electrical connection fixedly mounted on the housing through a supporting insulator 105, and the electrical connection is a structure in the combined electrical connection embodiment of the present invention, which is not described herein again.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. Combined type electric connection, including quiet end contact base (101), isolation quiet arc contact (103) and ground connection quiet arc contact (104), be equipped with insulating part connecting portion (11) and arc contact installation department (12) on quiet end contact base (101), insulating part connecting portion (11) are used for being connected with isolation earthing switch's corresponding support insulating part (105), its characterized in that, be equipped with the base mounting hole on arc contact installation department (12), fixed assembly has arc contact base (102) in the base mounting hole, keep apart quiet arc contact (103) and ground connection quiet arc contact (104) sharing arc contact base (102) and install in quiet end contact base (101).
2. The combined electrical coupling as claimed in claim 1, wherein the arcing contact base (102) is provided with a flange connection and is fixedly connected to the isolating stationary arcing contact (103) via the flange connection.
3. The combined electrical coupling of claim 1, wherein the isolating stationary arcing contact (103) is fixedly connected with the arcing contact base (102) by a threaded fastener.
4. The combined electrical coupling as claimed in any one of claims 1 to 3, wherein the grounded static arcing contact (104) is fixedly fitted on the arcing contact base (102) by screwing.
5. The combined electrical connection as claimed in claim 4, wherein the stationary grounding arcing contact (104) is screw-mounted on the arcing contact base (102) by means of a threaded hole provided in the arcing contact base (102), and the arcing contact base (102) is provided with a finger mounting portion surrounding the threaded hole, by means of which a grounding finger (108) of the stationary grounding main contact is mounted.
6. The combined electrical coupling of claim 5, wherein the finger mount is a finger mount sleeve disposed on the arcing contact base (102).
7. The combined electrical coupling as claimed in claim 5 or 6, characterised in that a first insulating element (109) is provided between the end of the grounding finger (108) close to the disposal mounting and the stationary contact base (101).
8. The combined electrical coupling as claimed in claim 5 or 6, characterised in that the stationary contact shoe (101) is provided on its side which is close to the grounding stationary arcing contact (104) with a shielding (110), the inner edge of the shielding (110) delimiting one end of the grounding contact finger (108) which is remote from the arcing contact base (102).
9. The combined electrical coupling as claimed in claim 8, wherein a second insulating member (111) is provided between the shielding case (110) and the end of the grounding contact finger (108) close to the shielding case (110), and the grounding contact finger (108) is retained by the second insulating member (111).
10. An isolating earthing switch comprising a housing and an electrical link fixedly mounted to the housing by means of a supporting insulator, characterized in that the electrical link is according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011419574.4A CN112701005B (en) | 2020-12-07 | 2020-12-07 | Combined electric connection and isolation grounding switch using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011419574.4A CN112701005B (en) | 2020-12-07 | 2020-12-07 | Combined electric connection and isolation grounding switch using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112701005A true CN112701005A (en) | 2021-04-23 |
| CN112701005B CN112701005B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011419574.4A Active CN112701005B (en) | 2020-12-07 | 2020-12-07 | Combined electric connection and isolation grounding switch using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112701005B (en) |
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|---|---|---|---|---|
| US2981815A (en) * | 1957-12-10 | 1961-04-25 | Westinghouse Electric Corp | Circuit interrupter |
| CN202268284U (en) * | 2011-09-02 | 2012-06-06 | 平高集团有限公司 | Moving and static contact connecting assembly and high voltage isolation grounding switch thereof |
| CN202678187U (en) * | 2012-06-21 | 2013-01-16 | 中国西电电气股份有限公司 | Three-position isolation grounding combination switch |
| CN104143451A (en) * | 2013-09-24 | 2014-11-12 | 国家电网公司 | High-speed earthing switch and earthing switch assembly unit with same |
| CN104143466A (en) * | 2013-09-24 | 2014-11-12 | 国家电网公司 | Earth switch assembly unit and high-speed earth switch thereof |
| CN205211647U (en) * | 2015-11-12 | 2016-05-04 | 川开电气有限公司 | Earthing switch who links to each other with tee bend |
| CN106571262A (en) * | 2016-10-27 | 2017-04-19 | 河南平高电气股份有限公司 | Isolation switch and contact assembly thereof |
| CN108269711A (en) * | 2017-12-11 | 2018-07-10 | 河南平高电气股份有限公司 | A kind of static contact and static contact component, GIS disconnecting switch |
| CN110718409A (en) * | 2019-07-12 | 2020-01-21 | 河南平高电气股份有限公司 | Isolation-grounding combined switch and isolation static contact supporting conductor thereof |
| CN214378173U (en) * | 2020-12-07 | 2021-10-08 | 河南平高电气股份有限公司 | Combined electric connection and isolation grounding switch using same |
-
2020
- 2020-12-07 CN CN202011419574.4A patent/CN112701005B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2981815A (en) * | 1957-12-10 | 1961-04-25 | Westinghouse Electric Corp | Circuit interrupter |
| CN202268284U (en) * | 2011-09-02 | 2012-06-06 | 平高集团有限公司 | Moving and static contact connecting assembly and high voltage isolation grounding switch thereof |
| CN202678187U (en) * | 2012-06-21 | 2013-01-16 | 中国西电电气股份有限公司 | Three-position isolation grounding combination switch |
| CN104143451A (en) * | 2013-09-24 | 2014-11-12 | 国家电网公司 | High-speed earthing switch and earthing switch assembly unit with same |
| CN104143466A (en) * | 2013-09-24 | 2014-11-12 | 国家电网公司 | Earth switch assembly unit and high-speed earth switch thereof |
| CN205211647U (en) * | 2015-11-12 | 2016-05-04 | 川开电气有限公司 | Earthing switch who links to each other with tee bend |
| CN106571262A (en) * | 2016-10-27 | 2017-04-19 | 河南平高电气股份有限公司 | Isolation switch and contact assembly thereof |
| CN108269711A (en) * | 2017-12-11 | 2018-07-10 | 河南平高电气股份有限公司 | A kind of static contact and static contact component, GIS disconnecting switch |
| CN110718409A (en) * | 2019-07-12 | 2020-01-21 | 河南平高电气股份有限公司 | Isolation-grounding combined switch and isolation static contact supporting conductor thereof |
| CN214378173U (en) * | 2020-12-07 | 2021-10-08 | 河南平高电气股份有限公司 | Combined electric connection and isolation grounding switch using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112701005B (en) | 2024-06-14 |
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