CN108808603A - 35kV switchgear bus casings - Google Patents
35kV switchgear bus casings Download PDFInfo
- Publication number
- CN108808603A CN108808603A CN201811016986.6A CN201811016986A CN108808603A CN 108808603 A CN108808603 A CN 108808603A CN 201811016986 A CN201811016986 A CN 201811016986A CN 108808603 A CN108808603 A CN 108808603A
- Authority
- CN
- China
- Prior art keywords
- main body
- shielding layer
- flange
- casing
- external shielding
- 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
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/061—Tubular casings
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- Patch Boards (AREA)
Abstract
The invention discloses a kind of 35kV switchgears bus casing, including casing main body, casing main body is disposed with overskirt edge, flange sleeve, skirt edge from top to bottom；Flange sleeve is set to the middle part of casing main body；Flange sleeve includes flange, and the metal fixing being connected with switch board housing is provided on flange；The body interior of casing main body is provided with external shielding layer, and external shielding layer is curved to the inside, and external shielding layer is connected with metal fixing；Internal shield is correspondingly arranged on the inside of external shielding layer, internal shield is set on the inner wall of casing main body；The present invention uses double-layer shielding structure, reasonable for structure, eliminates the problems in bus casing internal electric field collection, has reached the equally distributed effect of bus casing internal electric field；Insulating layer in thickening between external shielding layer so that the partial discharge quantity of bus casing is substantially reduced and controls in the range of less than or equal to 3pC, improves safety, the reliability of bus casing.
Description
Technical field
The present invention relates to a kind of bus casing more particularly to a kind of 35kV switchgears bus casings.
Background technology
Switchgear is a kind of electrical equipment, be mainly used for power plant, power transformation in one's power the electric system such as industrial and mining enterprises receive and
It distributes electric energy and control, protection and monitoring is carried out to circuit.Current switchgear bus casing existing on the market is in experiment electricity
When pressure is 30~350,000 volts, partial discharge quantity is not more than 3pC；When test voltage is promoted to ten thousand volts of 40.5 × 1.1 (about 44.55)
When, the partial discharge quantity of existing bus casing is more than 3pC on the market, and safety is low, poor reliability.
Invention content
In order to solve the shortcoming present in above-mentioned technology, the present invention provides a kind of 35kV switchgears bus sheaths
Pipe.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of 35kV switchgears bus casing,
Including casing main body, casing main body is disposed with overskirt edge, flange sleeve, skirt edge from top to bottom；Flange sleeve is set
It is placed in the middle part of casing main body；Flange sleeve includes flange, and flange is set to the lower part of flange sleeve；It is provided with and opens on flange
Close the metal fixing that cabinet shell is connected；The body interior of casing main body is provided with external shielding layer, the inside lateral bending of external shielding layer
Song, external shielding layer are connected with metal fixing；Internal shield is correspondingly arranged on the inside of external shielding layer, internal shield is set to
On the inner wall of casing main body；Internal shield is connected by internal shield connecting line with bus bar with bolt.
Creepage distance between flange upper end and overskirt edge lower end is more than between flange lower end and skirt edge upper end
Creepage distance reduces the partial discharge quantity of bus casing.
The distance between internal shield of external shielding layer and corresponding position is not less than 75 millimeters, passes through external shielding layer in increase
Between thickness of insulating layer realize reduce bus casing partial discharge quantity.
The wall thickness of casing main body is not less than 10 millimeters, ensures that the anti-breakdown voltage of bus casing reaches 100,000 volts, safety
It can higher.
External shielding layer is electroconductive nylon circle, and equally distributed circular hole is offered on electroconductive nylon circle；Internal shield is conduction
Nylon ring offers equally distributed circular hole on electroconductive nylon circle.
Connecting hole is offered on metal fixing, connecting hole is multiple；Bolt in connecting hole by casing main body and switchs
Cabinet cage connection is together.
The present invention uses double-layer shielding structure, reasonable for structure, eliminates the problems in bus casing internal electric field collection, reaches
Bus casing internal electric field equally distributed effect；Insulating layer in thickening between external shielding layer so that the office of bus casing
Portion's discharge capacity is substantially reduced and controls in the range of less than or equal to 3pC, improves safety, the reliability of bus casing.
Description of the drawings
Fig. 1 is the integrally-built diagrammatic cross-section of the present invention.
Fig. 2 is the vertical view of the present invention.
In figure：1, casing main body；2, overskirt edge；3, skirt edge；4, flange；5, external shielding layer；6, internal shield；7,
Internal shield connecting line.
Specific implementation mode
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of 35kV switchgears bus casing, including casing main body 1, casing main body 1 from top to bottom according to
It is secondary to be provided with overskirt edge 2, flange sleeve, skirt edge 3；Flange sleeve is set to the middle part of casing main body 1；Flange sleeve packet
Flange 4 is included, flange 4 is set to the lower part of flange sleeve；The metal being connected with switch board housing is provided on flange 4 to fix
Part, connecting hole is offered on metal fixing, and connecting hole is multiple；Bolt in connecting hole will be outside casing main body 1 and switchgear
Shell links together.The body interior of casing main body 1 is provided with external shielding layer 5, and external shielding layer 5 is curved to the inside, external shielding layer 5
It is connected with metal fixing；The inside of external shielding layer 5 is correspondingly arranged on internal shield 6, and internal shield 6 is set to casing main body
On 1 inner wall.External shielding layer 5 is connected by metal fixing with switch board housing, and then is connected to ground；In use, interior screen
It covers layer 6 by internal shield connecting line 7 to be connected with bus bar with bolt, realizes the connection with high-pressure side.
The wall thickness of casing main body 1 is not less than 10 millimeters, ensures that the anti-breakdown voltage of bus casing reaches 100,000 volts, safety
It can higher.
Creepage distance between 2 lower end of 4 upper end of flange and overskirt edge be more than 4 lower end of flange and 3 upper end of skirt edge it
Between creepage distance, reduce the partial discharge quantity of bus casing.
The distance between internal shield of external shielding layer and corresponding position is not less than 75 millimeters, passes through external shielding layer in increase
Between thickness of insulating layer realize reduce bus casing partial discharge quantity.
External shielding layer 5 is electroconductive nylon circle, and equally distributed circular hole is offered on electroconductive nylon circle；Internal shield 6 is to lead
Electric nylon ring offers equally distributed circular hole on electroconductive nylon circle, eliminates the problems in bus casing internal electric field collection, reach
The equally distributed effect of bus casing internal electric field is arrived.The internal shield of existing bus casing is all to use metal in the market
Net, the disadvantage is that the both ends wedge angle of metal mesh can have electric discharge phenomena；And the internal shield 6 of the present invention is electroconductive nylon circle, nothing
Any wedge angle substantially increases the safety and reliability of bus casing.
For the present invention when carrying out partial discharge test, test voltage also can control bus casing when being more than or equal to 450,000 volts
Partial discharge quantity is not more than 3pC, reliability higher.
Compared with prior art, the present invention having the advantage that：
1) thickness of insulating layer between external shielding layer and internal shield is increased, the shelf depreciation of bus casing is reduced
Amount；
2) increase the creepage distance between flange upper end and overskirt edge lower end, reduce the shelf depreciation of bus casing
Amount；
3) inside and outside shielded layer is electroconductive nylon circle, eliminates the problems in bus casing internal electric field collection, has reached busbar
The effect of inside pipe casing electric fields uniform distribution；
4) internal shield is electroconductive nylon circle, without any wedge angle, the electric discharge phenomena of sharp corner is not present, improve bus sheath
The safety of pipe, reliability.
The above embodiment is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the scope of technical scheme of the present invention, also belong to this hair
Bright protection domain.
Claims (6)
1. a kind of 35kV switchgears bus casing, including casing main body (1), it is characterised in that：Described sleeve pipe main body (1) is from upper
Overskirt edge (2), flange sleeve, skirt edge (3) are disposed under；The flange sleeve is set to casing main body (1)
Middle part；The flange sleeve includes flange (4), and flange (4) is set to the lower part of flange sleeve；It is arranged on the flange (4)
There is the metal fixing being connected with switch board housing；The body interior of described sleeve pipe main body (1) is provided with external shielding layer (5),
External shielding layer (5) is curved to the inside, and external shielding layer (5) is connected with metal fixing；The inside of the external shielding layer (5) corresponds to
It is provided with internal shield (6), internal shield (6) is set on the inner wall of casing main body (1)；The internal shield (6) passes through interior
Shielded layer connecting line (7) is connected with bus bar with bolt.
2. 35kV switchgears bus casing according to claim 1, it is characterised in that：Flange (4) upper end with it is upper
Creepage distance between shirt rim portion (2) lower end is more than the creepage distance between flange (4) lower end and skirt edge (3) upper end, subtracts
The small partial discharge quantity of bus casing.
3. 35kV switchgears bus casing according to claim 1, it is characterised in that：The external shielding layer and corresponding position
The distance between internal shield set is not less than 75 millimeters, is realized and is reduced by the thickness of insulating layer between external shielding layer in increase
The partial discharge quantity of bus casing.
4. 35kV switchgears bus casing according to claim 1, it is characterised in that：The wall of described sleeve pipe main body (1)
Thickness is not less than 10 millimeters, ensures that the anti-breakdown voltage of bus casing reaches 100,000 volts, security performance higher.
5. 35kV switchgears bus casing according to claim 1, it is characterised in that：The external shielding layer (5) is to lead
Electric nylon ring offers equally distributed circular hole on electroconductive nylon circle；The internal shield (6) is electroconductive nylon circle, conductive Buddhist nun
Equally distributed circular hole is offered on Long Quan.
6. 35kV switchgears bus casing according to claim 1, it is characterised in that：It is opened up on the metal fixing
It is multiple to have connecting hole, connecting hole；Bolt in connecting hole links together casing main body (1) with switch board housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016986.6A CN108808603A (en) | 2018-09-03 | 2018-09-03 | 35kV switchgear bus casings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016986.6A CN108808603A (en) | 2018-09-03 | 2018-09-03 | 35kV switchgear bus casings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108808603A true CN108808603A (en) | 2018-11-13 |
Family
ID=64081855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811016986.6A Withdrawn CN108808603A (en) | 2018-09-03 | 2018-09-03 | 35kV switchgear bus casings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108808603A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109859911A (en) * | 2019-03-29 | 2019-06-07 | 江苏神马电力股份有限公司 | A kind of collar tube sub-assembly and bushing shell for transformer |
-
2018
- 2018-09-03 CN CN201811016986.6A patent/CN108808603A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109859911A (en) * | 2019-03-29 | 2019-06-07 | 江苏神马电力股份有限公司 | A kind of collar tube sub-assembly and bushing shell for transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181113 |