CN209169641U - Secondary total earth plate structure - Google Patents
Secondary total earth plate structure Download PDFInfo
- Publication number
- CN209169641U CN209169641U CN201821953440.9U CN201821953440U CN209169641U CN 209169641 U CN209169641 U CN 209169641U CN 201821953440 U CN201821953440 U CN 201821953440U CN 209169641 U CN209169641 U CN 209169641U
- Authority
- CN
- China
- Prior art keywords
- earth plate
- total earth
- copper bar
- plate structure
- cable
- Prior art date
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052802 copper Inorganic materials 0.000 claims abstract description 32
- 239000010949 copper Substances 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000000737 periodic effect Effects 0.000 abstract description 3
- 208000025274 Lightning injury Diseases 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Abstract
The utility model relates to a kind of secondary total earth plate structures comprising copper bar, twisted wire and total earth plate；In the cable duct below the screen cabinet of secondary device room, it is equipped with the copper bar by the direction of screen cabinet arrangement, and be also equipped with the copper bar in the cable duct of screen cabinet end, the adjacent copper bar joins end to end, and is formed and protects the indoor secondary grounded screen of equipotential；The secondary grounded screen side of equipotential is crimped to total earth plate by the twisted wire, and the reliable single-point for realizing secondary grounded screen to main grounding grid connects.The voltage born on secondary cable can be effectively reduced in the utility model, reduce the electric current flowed through in cable shield；Easy construction, and utilize the grounding point ground resistance of the secondary earth mat of operations staff's periodic detection to main grounding grid.
Description
Technical field
The utility model relates to a kind of substation's technical fields, especially with regard to one kind in substation secondary earth mat to mainly
Net secondary total earth plate structure of junction application.
Background technique
In substation, it is equipped with main grounding grid not only to provide for primary equipment with reference to ground, release various electric currents, guarantor
Personal safety is protected, there are also the secondary electrical grounding nets of special protection secondary device safe and reliable operation.The grounded screen is concentrated
The secondary devices such as master control room, switch yard, protective chamber concentration zones are arranged in, and close by cable duct inner copper line and main grounding grid
It is connected.
According to the great anti-accident measures of power grid, should adopt an effective measure the interference for preventing space magnetic field to secondary cable, and root
According to the actual conditions that switch yard and primary equipment are installed, laying and factory, the close-connected electrical grounding net of station owner's grounded screen.Deng
Current potential grounded screen should meet claimed below: 1) should master control room, the protection room laying channel of secondary cable, switch yard with regard to ground terminal
Sub- case and protection filter joint etc. are not less than 100mm using section2Naked copper row laying closely connect with main grounding grid
Electrical grounding net.2) master control room, protect Shi Ping cabinet lower layer cable duct in, by cabinet screen arrangement direction lay 100mm2
Dedicated copper bar, which is connected, is formed and protects indoor electrical grounding net.Protect indoor equipotential
Grounded screen and factory, the main grounding grid stood can only existence anduniquess tie point, tie point position preferably selects at cable shaft.To guarantee
Connection is reliable, and connecting line must be not less than 50mm at least 4 or more, section2Copper cable (row) constitute concurrent ground connection.
Although currently, strict regulations are made for the grounding point quantity of single electrical grounding net, not to " at least 4
It is more than root, section be not less than 50mm2Copper cable (row) constitute concurrent ground connection " practice propose concrete scheme, this be also design, construction
And the ambiguous place of acceptance specification.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of secondary total earth plate structures, can be greatly reduced
Maximum potential difference when lightning stroke in the closer electrical secondary system of distance fault point, the comprehensive resistance energy for invading and harassing electrical secondary system to voltage
Power increases.And dangerous point can be reduced, the probability that shielded layer is burnt occurs.
To achieve the above object, the utility model takes following technical scheme: a kind of secondary total earth plate structure comprising
Copper bar, twisted wire and total earth plate；In the cable duct below the screen cabinet of secondary device room, it is laid with by the direction of screen cabinet arrangement
Copper bar is stated, and is also equipped with the copper bar in the cable duct of screen cabinet end, the adjacent copper bar joins end to end, and forms protection
The indoor secondary grounded screen of equipotential；The secondary grounded screen side of equipotential is crimped to total ground connection by the twisted wire
Plate, the reliable single-point for realizing secondary grounded screen to main grounding grid connect.
Further, total earth plate includes floor body, connector and grounding flat steel；The floor body is using U-shaped
Structure, and the both ends for being located at the U-shaped structure opening are respectively arranged with extension；The extension is solid by the connector
It is scheduled on cable duct bottom；Junction between the extension and the cable duct is additionally provided with the grounding flat steel, leads to
It crosses the grounding flat steel and draws the floor body and be connected to main grounding grid.
Further, the band steel protective cover identical with its shape and structure is provided with outside the floor body, and this is flat
Two extensions of steel protective cover are fixed on the cable duct bottom by the connector.
It further, is 100mm by the copper bar specification that the direction of screen cabinet arrangement is laid with2。
Further, the twisted wire uses 4 specifications for 50mm2Copper stranded conductor constitute.
Further, the floor body is made of the copper plate of about 0.8 meter of length, 40 × 4.
Further, the band steel protective cover uses length to be made of 0.8 meter of zinc-coated flat steel sheet.
Further, the connector uses the expansion bolt of M10 × 110.
Further, two extensions of the floor body are fixed on by the connector away from the 300mm of cable duct bottom.
Because the utility model adopts the above technical scheme, it has the following advantages: total earth plate of 1, the utility model
It is the equal of the busbar connector of a secondary electrical grounding net.It is added in the secondary electrical grounding net cable duct of protective chamber
Total earth plate, maximum potential difference when lightning stroke can be greatly reduced in the closer electrical secondary system of distance fault point, makes electrical secondary system pair
The synthesis resistivity that voltage is invaded and harassed increases；Simultaneously when power frequency and lightning stroke occur, adding total fishplate bar can make electric current more uniform
The cable shield for flowing through entire electrical secondary system, reduce dangerous point and the probability that burns of shielded layer occur.2, the utility model exists
The U-shaped secondary total earth plate of small interior setting is not less than 50mm compared to using 4 or more, section2Copper cable lead to main grounding grid
Mode, convenient for the grounding point ground resistance of the secondary earth mat of operations staff's periodic detection to main grounding grid, and construction is simple, big
Certain copper consumption can be also saved in the more engineering of protective chamber in type substation.
Detailed description of the invention
Fig. 1 is the secondary earth mat plan view in secondary device room；
Fig. 2 is secondary total earth plate structural schematic diagram；
Fig. 3 is the top view of Fig. 2.
Specific embodiment
In the description of the present invention, it should be understood that the orientation of the instructions such as term " on ", "lower" "inner", "outside"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it should not be understood as limiting the present invention.Detailed retouch is carried out to the utility model with reference to the accompanying drawings and examples
It states.
As shown in Figure 1, the utility model provides a kind of secondary total earth plate structure, the structure is small for master control room and protection
The secondary electrical grounding net in room is to main grounding grid junction comprising copper bar 1, twisted wire 2 and total earth plate 3.Positioned at secondary device
In cable duct below the screen cabinet of room, it is equipped with copper bar 1 by the direction of screen cabinet arrangement, and be also laid in the cable duct of screen cabinet end
There is a copper bar 1, and adjacent copper bar 1 joins end to end, and is formed and protects the indoor secondary grounded screen of equipotential.The secondary grounded screen of equipotential
Side is crimped to total earth plate 3 by twisted wire 2, and the reliable single-point for realizing secondary grounded screen to main grounding grid connects, can be effective
The voltage born on secondary cable is reduced, the electric current flowed through in cable shield is reduced.
In a preferred embodiment, as shown in Figure 2 and Figure 3, total earth plate 3 includes floor body 4, connector 5 and connects
Ground band steel 6.Floor body 4 uses U-shaped structure, convenient for the crimping of twisted wire 2 and routine testing ground resistance；And it is opened positioned at U-shaped structure
Both ends at mouthful are respectively arranged with extension.The extension of floor body 4 is fixed on cable duct bottom by connector 5；It is located at
Junction between extension and cable duct is additionally provided with grounding flat steel 6, draws floor body 4 by grounding flat steel 6 and is connected to master
Grounded screen.
In above-described embodiment, band steel protective cover 7 identical with its shape and structure is provided with outside floor body 4, and
Two extensions of the band steel protective cover 7 are fixed on cable duct bottom also by connector 5.
It is 100mm by 1 specification of copper bar that the direction of screen cabinet arrangement is laid in the various embodiments described above2, i.e. copper core in copper bar 1
Cross-sectional area be 100mm2。
In the various embodiments described above, twisted wire 2 uses 4 specifications for 50mm2Copper stranded conductor constitute.
In the various embodiments described above, floor body 4 is made of the copper plate of about 0.8 meter of length, 40 × 4；Band steel protective cover 7
Length is used to be made of 0.8 meter of zinc-coated flat steel sheet.
In the various embodiments described above, connector 5 uses the expansion bolt of M10 × 110.
In the various embodiments described above, two extensions of floor body 4 are fixed on by connector 5 away from the 300mm of cable duct bottom.
To sum up, master control room, protective chamber are mounted on secondary grounded screen in substation, secondary grounded screen and main grounding grid
It connects significant safely to secondary device.The utility model adds total earth plate in secondary grounded screen, so that each cell
Secondary electrical grounding net be that single-point is connect with grounded screen, can be effectively reduced the voltage born on secondary cable, reduce
The electric current flowed through in cable shield.
The both ends of total earth plate are external to main grounding grid using grounding flat steel 6 and realize the reliable of secondary earth mat and main grounding grid
A little connect.Easy construction, and utilize the grounding point ground resistance of the secondary earth mat of operations staff's periodic detection to main grounding grid.
The various embodiments described above are merely to illustrate the utility model, and structure and size, setting position and the shape of each component are all
Can be varied, on the basis of technical solutions of the utility model, it is all according to the utility model principle to individual part into
Capable improvement and equivalents, should not exclude except the protection scope of the utility model.
Claims (8)
1. a kind of secondary total earth plate structure, it is characterised in that: including copper bar, twisted wire and total earth plate；Positioned at secondary device room
Shield in the cable duct below cabinet, is equipped with the copper bar by the direction of screen cabinet arrangement, and also spread in the cable duct of screen cabinet end
Equipped with the copper bar, the adjacent copper bar joins end to end, and is formed and protects the indoor secondary grounded screen of equipotential；The equipotential
Secondary grounded screen side is crimped to total earth plate by the twisted wire, realizes the reliable list of secondary grounded screen to main grounding grid
Point connection.
2. secondary total earth plate structure as described in claim 1, it is characterised in that: total earth plate include floor body,
Connector and grounding flat steel；The floor body uses U-shaped structure, and the both ends for being located at the U-shaped structure opening are set respectively
It is equipped with extension；The extension is fixed on cable duct bottom by the connector；Positioned at the extension and the cable
Junction between ditch is additionally provided with the grounding flat steel, draws the floor body by the grounding flat steel and is connected to main ground connection
Net.
3. secondary total earth plate structure as claimed in claim 2, it is characterised in that: be provided with outside the floor body and its
The identical band steel protective cover of shape and structure, and two extensions of the band steel protective cover are fixed on the cable by the connector
Ditch bottom.
4. secondary total earth plate structure as described in any one of claims 1 to 3, it is characterised in that: by screen cabinet arrangement
The copper bar specification that direction is laid with is 100mm2。
5. secondary total earth plate structure as described in any one of claims 1 to 3, it is characterised in that: the twisted wire is using 4 rule
Lattice are 50mm2Copper stranded conductor constitute.
6. secondary total earth plate structure as claimed in claim 3, it is characterised in that: the band steel protective cover use length for
0.8 meter of zinc-coated flat steel sheet is made.
7. secondary total earth plate structure as claimed in claim 2 or claim 3, it is characterised in that: the connector uses M10 × 110
Expansion bolt.
8. secondary total earth plate structure as claimed in claim 2 or claim 3, it is characterised in that: two extensions of the floor body
It is fixed on by the connector away from the 300mm of cable duct bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821953440.9U CN209169641U (en) | 2018-11-26 | 2018-11-26 | Secondary total earth plate structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821953440.9U CN209169641U (en) | 2018-11-26 | 2018-11-26 | Secondary total earth plate structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209169641U true CN209169641U (en) | 2019-07-26 |
Family
ID=67340133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821953440.9U Active CN209169641U (en) | 2018-11-26 | 2018-11-26 | Secondary total earth plate structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209169641U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346929A (en) * | 2018-11-26 | 2019-02-15 | 国家电网有限公司 | A kind of secondary total earth plate structure |
-
2018
- 2018-11-26 CN CN201821953440.9U patent/CN209169641U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346929A (en) * | 2018-11-26 | 2019-02-15 | 国家电网有限公司 | A kind of secondary total earth plate structure |
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