CN109066341A - A kind of switch cabinet connecting device and installation method - Google Patents
A kind of switch cabinet connecting device and installation method Download PDFInfo
- Publication number
- CN109066341A CN109066341A CN201811008480.0A CN201811008480A CN109066341A CN 109066341 A CN109066341 A CN 109066341A CN 201811008480 A CN201811008480 A CN 201811008480A CN 109066341 A CN109066341 A CN 109066341A
- Authority
- CN
- China
- Prior art keywords
- insulating sleeve
- conductor
- switch cabinet
- connecting device
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/308—Mounting of cabinets together
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Patch Boards (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The present invention provides a kind of switch cabinet connecting device and installation method, the switch cabinet connecting device includes connection conductor, insulating sleeve, insulate connector sleeve and center conductor and spring, it connects conductor one end and runs through insulating sleeve, and the structure that is sealedly and fixedly connected is formed between insulating sleeve, the connection conductor other end exposes to insulating sleeve, center conductor is hollow cylindrical configuration, and socket structure is formed between one end and connection conductor one end, spring is arranged in belled position between connection conductor and center conductor, insulation connector sleeve is mounted between insulating sleeve and center conductor.The present invention is suitable for being linked and packed between different current class switchgears, no matter switchgear or attachment device enterprise, assembly accessory and product inventory can all be reduced, avoid the attachment device of different current classes using different molds, to be easily achieved the production of product batch metaplasia, research and development of products cost is reduced, product own cost is also reduced.
Description
Technical field
The present invention relates to switchgears to connect mounting technique field, more particularly, to applied to 35kV, 2500A and following electricity
A kind of switch cabinet connecting device and installation method of pressure, current class.
Background technique
Existing switchgear is when carrying out mutual connection installation, especially ring network cabinet, GIS cabinet difference current class
Switchgear product or current class of the same race switchgear product respectively splice assembling when, different current classes, different voltages etc.
The switchgear product of grade is different, and required connection accessory is relatively more, and attachment device number of fitting parts required for causing is more, even
It is more troublesome to connect installation, also needs to change the structure size of switchgear sometimes, not only increases opening for attachment device aftermarket product
Cost is sent out, but also correspondingly increases the design installation difficulty of switchgear.
For example, when outlet is two 1250A, needing three switchgears, including an incoming line cabinet if inlet wire is 2500A
With two outgoing line cabinets, these three switchgears must all select the spelling cabinet attachment device of 2500A.But if make two of outlet
1250A switchgear uses the spelling cabinet attachment device of 1250A grade, then not only installation is simple, can also reduce attachment device product
Input cost.Therefore, for being linked and packed between different current class switchgears, it is necessary to research and develop special switchgear
Attachment device reduces product input cost to reduce assembly accessory.
Summary of the invention
The technical problem to be solved by the present invention is in view of the problems of the existing technology, providing a kind of switchgear connection dress
It sets and installation method, not only being linked and packed between Convenient switch cabinet, but also advantageously reduces the input cost of attachment device.
The technical problem to be solved in the present invention is realized using following technical scheme: a kind of switch cabinet connecting device, including
Connect conductor, insulating sleeve, insulation connector sleeve and center conductor and spring, described connection conductor one end run through insulating sleeve and
The structure that is sealedly and fixedly connected is formed between insulating sleeve, the connection conductor other end exposes to insulating sleeve, the center
Conductor is to form socket structure between hollow cylindrical configuration and one end and connection conductor one end, is led in connection conductor with center
Spring is arranged in belled position between body, and the insulation connector sleeve is mounted between insulating sleeve and center conductor.
Preferably, the spring mounting groove of connection conductor one end setting ring structure, the spring be annular ring spring,
And spring socket is mounted in spring mounting groove.
Preferably, high voltage shield is rabbeted on the insulating sleeve, between the high voltage shield and connection conductor
It is formed and is conductively connected.
Preferably, the cross sectional shape of the high voltage shield is U-shaped, and end forms arc structure.
Preferably, on the insulating sleeve rabbet metal insert set and low pressure shielding part, the low pressure shielding part with
It is formed and is conductively connected between metal insert set.
Preferably, the cross sectional shape of the low pressure shielding part is T shape, and end forms arc-shaped structure.
Preferably, several boss are set in the exterior circumference of the insulating sleeve.
Preferably, the insulation connector sleeve is to consolidate the layer formed by interior semi-conductive layer, insulating layer and outer semiconducting layer
Shape structural member, the insulating layer is between interior semi-conductive layer and outer semiconducting layer and insulating layer end exposes to and partly leads outside
Electric layer.
Preferably, limited step is arranged in the type resonator end surface of the insulating sleeve.
A kind of switchgear connection installation method, is carried out using switch cabinet connecting device as described above, also,
Firstly, installing insulating sleeve respectively on two switchgears for needing to spell cabinet connection, and an insulation sleeve wherein
Center conductor is installed on pipe, and insulation connector sleeve is mounted on center conductor；
Then, make relatively close movement between two switchgears, until the company on center conductor and another insulating sleeve
Connect between conductor grafting in place.
Compared with prior art, the beneficial effects of the present invention are: the chief component of the switch cabinet connecting device includes
Connection conductor, insulating sleeve, insulate connector sleeve, center conductor and spring, the negligible amounts of components, the assembly between components
Structure is also simple, significantly reduces the input costs such as research and development, the production of switch cabinet connecting device, also, utilize the switchgear
It is easy to operate when attachment device is attached installation exercise to two switchgears for needing to spell cabinet connection, it greatly improves out
Close the connection installation exercise efficiency between cabinet.Present invention is particularly suitable for the connection dresses between the switchgear of different current classes
Match, whether switchgear enterprise or attachment device enterprise, can reduce assembly accessory, and efficiently reduce product library
It deposits, avoids the switchgears of different current classes using different molds come the attachment device that forms a complete production network, thus, it is easy to realize production
The mass production of product, advantageously reduces the research and development cost of product, while also reducing product own cost.
Detailed description of the invention
Fig. 1 is a kind of organigram of switch cabinet connecting device of the present invention.
Fig. 2 is the assembling structure schematic diagram connected between conductor and insulating sleeve.
Fig. 3 is the cross-sectional view of insulating part.
Fig. 4 is the main view of spring.
Fig. 5 is the side view of spring.
Fig. 6 is the schematic illustration that a kind of switchgear of the present invention connects installation method.
Marked in the figure: 1- connection conductor, 2- insulating sleeve, 3- metal insert set, 4- switch cabinet, 5- sealing ring, 6- are exhausted
Edge connector sleeve, 7- center conductor, 8- spring, 9- ground line, 11- conductive connection hole, 12- transition arc, 13- spring mounting groove,
14- seal convexity, 21- high voltage shield, 22- low pressure shielding part, 23- seal groove, 24- limited step, 25- boss, 61- interior half
Conductive layer, 62- insulating layer, 63- outer semiconducting layer, 64- are grounded mounting groove.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and specific implementation
The present invention is described in detail for example.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Switch cabinet connecting device as shown in Figure 1, it is main include connection conductor 1, insulating sleeve 2, insulation connector sleeve 6, in
Heart conductor 7 and spring 8 and ground line 9, the center conductor 7 are hollow cylindrical configuration, one end with connect 1 one end of conductor
Between form socket structure, spring 8, the described insulation connection is arranged in the belled position between connection conductor 1 and center conductor 7
Set 6 is mounted between insulating sleeve 2 and center conductor 7.Specifically, the connection conductor 1, center conductor 7 are copper or aluminium
Equal conductive metal materials, the insulating sleeve 2 preferably use epoxy resin bushing, the exterior circumference in 2 one end of insulating sleeve
On be provided with several boss 25, the inside of the insulating sleeve 2 is type semienclosed chamber, and type resonator end surface is provided with 23 He of seal groove
Limited step 24 installs sealing ring 5 in the seal groove 23, rabbets several gold on the insulating sleeve 2 in 23 outside of seal groove
Belong to inserts set 3, the metal insert set 3 forms through-hole in 2 two sides of insulating sleeve.In production, insulating sleeve 2 is led with connection
An entirety has been die cast as between body 1, it is air tight therebetween, that is, insulating sleeve is being run through in described 1 one end of connection conductor
The structure that is sealedly and fixedly connected is formed after 2 and between insulating sleeve 2, and the other end for connecting conductor 1 then exposes to insulation sleeve
Pipe 2.Further, several seal convexities 14 are set on connection conductor 1, the connection conductor 1 by seal convexity 14 with
It is formed and is sealedly and fixedly connected structure between insulating sleeve 2, can not only make to connect connection between conductor 1 and insulating sleeve 2 more
Reliably, it is made to be not to separate under the action of longitudinal force, moreover, it is also possible to ensure between the inside and outside portion of insulating sleeve 2
Draught head be not because connect 1 surface of conductor penetrate due to reduce.
Wherein, it exposes on the part connection conductor 1 of insulating sleeve 2 and offers several conductive connection holes 11, be located at
The spring mounting groove 13 that several ring structures are offered on part connection conductor 1 inside insulating sleeve 2, in connection conductor 1
End face forms transition arc 12, as shown in Figure 2.It is conductively connected hole 11 by setting, facilitates the main bus-bar inside connecting switch cabinet
It is conductively connected with connecting between conductor 1 by the conductive connection hole 11, to guarantee through high current and transmitting high voltage.
The spring 8 can be mounted in spring mounting groove 13 using annular ring spring as shown in Figure 4, Figure 5, and by the socket of spring 8,
Formation contacts through-flow between the spring 8 and center conductor 7, as shown in Figure 1.
As shown in figure 3, it is hollow, both ends open tubular structure that the insulation connector sleeve 6, which is intermediate, including interior partly lead
Electric layer 61, insulating layer 62 and outer semiconducting layer 63, interior semi-conductive layer 61 and outer semiconducting layer 63 therein are semi-conductive rubber
Material, remaining insulating layer 62 are electro-insulating rubber material.Interior semi-conductive layer 61, insulating layer 62 and the outer semiconducting layer 63 is solid
Knot forms layer structure, and the insulating layer 62 is between interior semi-conductive layer 61 and outer semiconducting layer 63 and 62 end of insulating layer
Portion exposes to outer semiconducting layer 63.The both ends in 6 outside of insulation connector sleeve are respectively pyramidal structure, in insulation connector sleeve 6
On the outer semiconducting layer 63 in portion setting ground line mounting groove 64, it is described ground line 9 one end be mounted on ground line mounting groove 64 in,
The other end exposes to insulating sleeve 2.
When carrying out the spelling cabinet connection installation exercise between switchgear using above-mentioned switch cabinet connecting device, as shown in fig. 6,
Specifically:
Firstly, insulating sleeve 2 is installed respectively on the switch cabinet 4 of two switchgears for spell cabinet connection, it will
The stud of switchgear side panel is fixed after passing through metal insert set 3.Due to insulating sleeve 2 be by metal insert set 3 with
What switch cabinet 4 connected, and the ground connection of switch cabinet 4 can cover 3 by metal insert and improve, and can shorten connection conductor 1 in this way
On high voltage by 2 surface of insulating sleeve reach ground potential distance.It, can be with by the way that boss 25 is arranged on insulating sleeve 2
Increase creepage distance, so that attachment device product be made to be not to puncture because of surface creepage.
Then, the socket of spring 8 is mounted in spring mounting groove 13, center conductor 7 is packed into spring 8, makes to connect
It connects and forms equipotential link between conductor 1 and center conductor 7, and can be formed through-flow.Insulation connector sleeve 6 is mounted on center conductor
On 7, low pressure shielding part 22 therein forms equipotential link with switch cabinet 4 by metal insert set 3, when switch cabinet 4 connects
When ground, the low pressure shielding part 22 also electrical grounding.
Next, first fixing one of switchgear, then another switchgear is elapsed into simultaneously that close fixed
A switchgear, until center conductor 7 and another insulating sleeve 2 on connection conductor 1 between grafting in place, as shown in Figure 6.When
After two switchgears fix respectively, installation exercise is completed, can normal transfer overvoltage, electric current between two switchgears.
When switchgear and attachment device are run, point will form between insulation connector sleeve 6 and the contact surface of insulating sleeve 2
Angle, and the electric field strength of the sharp corner is very big, the discharge path easy to form along 2 inner surface of insulating sleeve, so as to cause breakdown,
Lead to attachment device product failure.In order to be effectively prevented from generation discharge breakdown, high pressure screen can be rabbeted inside insulating sleeve 2
Shield 21 and low pressure shielding part 22, the high voltage shield 21, low pressure shielding part 22 are conductive or semiconductive material.Wherein,
The cross sectional shape of the high voltage shield 21 preferably uses U-shaped structure, among it with connect between conductor 1 formed be conductively connected；
Further, the end of the high voltage shield 21 is formed as arc structure, such as closing or endless totally enclosed arc-shaped
Structure.The cross sectional shape of the low pressure shielding part 22 preferably uses T-shaped structure, and one side passes through several connecting lines and metal insert
It is formed and is conductively connected between set 3, other side both ends are arc-shaped structure and have certain distance apart from 2 internal cavity of insulating sleeve.
Further, the radius of curvature of the arc-shaped structure at 22 both ends of low pressure shielding part is unequal, close to high voltage shield 21 that
The radius of curvature of the arc-shaped structure of side is preferably less than the radius of curvature of the arc-shaped structure close to 23 that side of seal groove,
As shown in Figure 2.
By the way that high voltage shield 21 is arranged, mainly play the role of high-tension shielding, to prevent insulation connector sleeve 6 and insulation
It discharges between the end face of casing 2 since mismachining tolerance or installation error form the air gap, and then attachment device is caused to produce
Product failure.By the way that low pressure shielding part 22 is arranged, it is also possible that the electric-field strength at the contact surface of center conductor 7 and insulating sleeve 2
Degree is substantially reduced, to be conducive to improve the service life of attachment device product.
Due to technological problems, the cabinet bore size of switch cabinet 4 is relatively accurate, and switchs the ruler that screw thread is welded on cabinet
It is very little relatively inaccurate, therefore, limited step 24 is arranged by the type resonator end surface in insulating sleeve 2, the limited step 24 is logical
It is often to be formed by casting and be integrated molding structure between limited step 24 and insulating sleeve 2.When attachment device product is pacified
When dress, the limited step 24 can pass through the aperture on switch cabinet 4 and be fixed, so that pacifying on two switchgears
Concentricity between the insulating sleeve 2 of dress is relatively accurate, and the concentricity it is accurate whether will directly affect attachment device product
Can performance when in use meet the requirements.
Switch cabinet connecting device of the invention can be used for 35kV and following voltage class, pass through replacement connection conductor 1 and bullet
The quantity of spring 8, can under the premise of not changing switch cabinet structure size unrestricted choice 630A, 1250A, 1600A, 2000A,
The through-flow demand of 2500A current class, be easy to implement switchgear especially ring network cabinet, GIS cabinet different current classes between
Independent assortment, reduces installation cost, also reduces installation difficulty.For example, when using 630A electric current, spring 8 settable 1
Part, spring mounting groove 13 process 1, connect conductor 1 and center conductor 7 may be selected to be aluminium material.When using 1250A electric current,
8 settable 2, spring, spring mounting groove 13 processes 2, connects conductor 1 and center conductor 7 may be selected to be aluminium material.Work as use
When 1600A electric current, spring 8 may be selected 3, and spring mounting groove 13 processes 3, connects conductor 1 and center conductor 7 may be selected to be aluminium
Material.When using 2000A electric current, spring 8 may be selected 2, and spring mounting groove 13 processes 2, connect conductor 1 and center conductor
7 may be selected to be copper material.When using 2500A electric current, spring 8 may be selected 3, and spring mounting groove 13 processes 3, connect conductor
1 and center conductor 7 may be selected to be copper material.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of switch cabinet connecting device, it is characterised in that: including connection conductor (1), insulating sleeve (2), insulation connector sleeve (6)
And center conductor (7) and spring (8), the connection conductor (1) one end run through insulating sleeve (2) and between insulating sleeve (2)
Formation is sealedly and fixedly connected structure, and connection conductor (1) other end exposes to insulating sleeve (2), and the center conductor (7) is
Hollow cylindrical configuration and one end form socket structure with connecting between conductor (1) one end, lead in connection conductor (1) with center
Spring (8) are arranged in belled position between body (7), and the insulation connector sleeve (6) is mounted on insulating sleeve (2) and center conductor
(7) between.
2. a kind of switch cabinet connecting device according to claim 1, it is characterised in that: described connection conductor (1) one end is set
The spring mounting groove (13) of ring structure is set, the spring (8) is annular ring spring and spring (8) socket is mounted on spring peace
In tankage (13).
3. a kind of switch cabinet connecting device according to claim 1, it is characterised in that: embedding on the insulating sleeve (2)
It connects high voltage shield (21), the high voltage shield (21) is conductively connected with formation between conductor (1) is connect.
4. a kind of switch cabinet connecting device according to claim 3, it is characterised in that: the high voltage shield (21) is cut
Face shape is U-shaped, and end forms arc structure.
5. a kind of switch cabinet connecting device according to claim 1, it is characterised in that: embedding on the insulating sleeve (2)
Metal insert set (3) and low pressure shielding part (22) are connect, is formed and is led between the low pressure shielding part (22) and metal insert set (3)
Electrical connection.
6. a kind of switch cabinet connecting device according to claim 5, it is characterised in that: the low pressure shielding part (22) is cut
Face shape is T shape, and end forms arc-shaped structure.
7. a kind of switch cabinet connecting device according to claim 1-6, it is characterised in that: the insulating sleeve
(2) several boss (25) are set in exterior circumference.
8. a kind of switch cabinet connecting device according to claim 1-6, it is characterised in that: the insulation connection
Set (6) is that the layered structural articles formed are consolidated by interior semi-conductive layer (61), insulating layer (62) and outer semiconducting layer (63), described
Insulating layer (62) is between interior semi-conductive layer (61) and outer semiconducting layer (63) and insulating layer (62) end exposes to and partly leads outside
Electric layer (63).
9. a kind of switch cabinet connecting device according to claim 1, it is characterised in that: the type chamber of the insulating sleeve (2)
Limited step (24) are arranged in end face.
10. a kind of switchgear connects installation method, it is characterised in that: using such as the described in any item switchgears of claim 1-9
Attachment device carries out, also,
Firstly, installing insulating sleeve (2) respectively on two switchgears for needing to spell cabinet connection, and an insulating sleeve wherein
(2) center conductor (7) are installed on, and insulation connector sleeve (6) is mounted on center conductor (7)；
Then, make relatively close movement between two switchgears, until on center conductor (7) and another insulating sleeve (2)
Connect conductor (1) between grafting in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008480.0A CN109066341B (en) | 2018-08-31 | 2018-08-31 | Switch cabinet connecting device and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008480.0A CN109066341B (en) | 2018-08-31 | 2018-08-31 | Switch cabinet connecting device and installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109066341A true CN109066341A (en) | 2018-12-21 |
| CN109066341B CN109066341B (en) | 2023-12-26 |
Family
ID=64758012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811008480.0A Active CN109066341B (en) | 2018-08-31 | 2018-08-31 | Switch cabinet connecting device and installation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109066341B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467596A (en) * | 2019-09-06 | 2021-03-09 | 河南森源电气股份有限公司 | Switch cabinet group |
| CN115064900A (en) * | 2022-06-02 | 2022-09-16 | 汇网电气有限公司 | Connecting device of switch cabinet |
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| CN102157830A (en) * | 2011-03-31 | 2011-08-17 | 宁波天安（集团）股份有限公司 | Solid insulating bus connector |
| CN202178506U (en) * | 2011-08-22 | 2012-03-28 | 浙江雷安电气有限公司 | High-voltage switch cabinet casing pipe |
| CN206379628U (en) * | 2016-12-28 | 2017-08-04 | 汉舟四川铜铝复合科技有限公司 | One kind is used for busbar channel and switch disconnector attachment means in cabinet |
| CN207303817U (en) * | 2017-11-07 | 2018-05-01 | 西门子中压开关技术（无锡）有限公司 | Compound inslation switchgear |
| CN207517450U (en) * | 2017-11-15 | 2018-06-19 | 江苏金三力电力器材实业有限公司 | A kind of high ferro locomotive switchgear polymerization crystal silicon insulator |
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2018
- 2018-08-31 CN CN201811008480.0A patent/CN109066341B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157830A (en) * | 2011-03-31 | 2011-08-17 | 宁波天安（集团）股份有限公司 | Solid insulating bus connector |
| CN202178506U (en) * | 2011-08-22 | 2012-03-28 | 浙江雷安电气有限公司 | High-voltage switch cabinet casing pipe |
| CN206379628U (en) * | 2016-12-28 | 2017-08-04 | 汉舟四川铜铝复合科技有限公司 | One kind is used for busbar channel and switch disconnector attachment means in cabinet |
| CN207303817U (en) * | 2017-11-07 | 2018-05-01 | 西门子中压开关技术（无锡）有限公司 | Compound inslation switchgear |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467596A (en) * | 2019-09-06 | 2021-03-09 | 河南森源电气股份有限公司 | Switch cabinet group |
| CN115064900A (en) * | 2022-06-02 | 2022-09-16 | 汇网电气有限公司 | Connecting device of switch cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109066341B (en) | 2023-12-26 |
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