CN209497254U - A kind of transformer neutral point grounding surge protective device - Google Patents
A kind of transformer neutral point grounding surge protective device Download PDFInfo
- Publication number
- CN209497254U CN209497254U CN201822051676.XU CN201822051676U CN209497254U CN 209497254 U CN209497254 U CN 209497254U CN 201822051676 U CN201822051676 U CN 201822051676U CN 209497254 U CN209497254 U CN 209497254U
- Authority
- CN
- China
- Prior art keywords
- support column
- arrester
- transformer
- neutral point
- disconnecting switch
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of transformer neutral point grounding surge protective devices, are related to Hyper-Voltage of Power Systems protection technique field.In the utility model: arrester is grounded after being connected in series with counter of lightning arrester；Discharging gap is grounded after connecting with current transformer；The tandem compound of the tandem compound of arrester and counter of lightning arrester, discharging gap and current transformer is connected in parallel with disconnecting switch；Concrete column includes the first support column and the second support column；First support column is bolted with the second support column by lead screw.The utility model passes through the protective device by being made of elements such as disconnecting switch, arrester, current transformer and discharging gaps; neutral ground or earth-free two different methods of operation are realized, to avoid transformer neutral point because being caused voltage to increase, damage to transformer insulated by lightning impulse and failure；By the way that adjustable concrete column mounting seat is arranged, the height of concrete column is adjusted according to landform.
Description
Technical field
The utility model belongs to Hyper-Voltage of Power Systems protection technique field, connects more particularly to a kind of transformer neutral point
Ground overvoltage protection.
Background technique
The neutral point of three-phase transformer connects in 1000KV, 750KV, 500KV, 330KV, 220KV, 110KV voltage class
Ground system, commonly referred to as heavy current grounding system；The neutral point of three-phase transformer can be in 35KV, 10KV, 6KV voltage class
By grounding through arc, resistance eutral grounding or isolated neutral system, commonly referred to as small current neutral grounding system.
110kV, 220kV are the mains voltage grades of supply network, since lightning stroke, single-phase grounding fault etc. will cause
Neutral point overvoltage, and supply network is normally placed in deserted mountain field, when installation, need to be adjusted depending on the site environment.
Utility model content
The purpose of this utility model is to provide a kind of transformer neutral point grounding surge protective devices, by by being isolated
The protective device of the elements such as switch, arrester, current transformer and discharging gap composition, realizes neutral ground or earth-free two
The different method of operation of kind, to avoid transformer neutral point because being caused voltage to increase, to transformer by lightning impulse and failure
Insulation damages；By the way that adjustable concrete column mounting seat is arranged, the height of concrete column is adjusted according to landform, convenient for each
A landform protection device for installing.
In order to solve the above technical problems, the utility model is achieved through the following technical solutions:
The utility model is a kind of transformer neutral point grounding surge protective device, including pedestal, table on the pedestal
Face is separately installed with a disconnecting switch, arrester, counter of lightning arrester, discharging gap and current transformer；Under the pedestal
Surface is equipped with one or several concrete columns；
The arrester is grounded after being connected in series with counter of lightning arrester；After the discharging gap is connected with current transformer
Ground connection；The top of the disconnecting switch and the neutral point of transformer connect；The Bottom ground of the disconnecting switch；The arrester
It is connected in parallel with disconnecting switch with the tandem compound of the tandem compound of counter of lightning arrester, discharging gap and current transformer；
The discharging gap is stick electrode；One end of the stick electrode is equipped with screw thread, the screw thread and discharging gap
Fixed mechanism on nut cooperation；
The concrete column is equipped with several annular mounting bases；One hand control valve is installed in the mounting base；The hand
Dynamic control valve is connect with disconnecting switch；
The concrete column includes the first support column and the second support column；The upper end of first support column and the fixed company of pedestal
It connects；The bottom end of second support column is fixed on bottom surface；The opposite sides of the first support column week side is respectively equipped with one
Guide groove；The bottom surface of first support column is equipped with a screw hole；The upper surface intermediate active of second support column is equipped with one
Lead screw bolt；The lead screw bolt and the screw hole of the first support column bottom surface cooperate, and pass through the first support of rotational lead screw bolt driving
Column is slided up and down along guide post, the height of adjustment base；The two sides of the lead screw bolt are respectively equipped with a guide post；The guiding
Column and guide groove cooperate.
Further, the disconnecting switch uses GW outdoor disconnector or GW outdoor disconnector.
Further, the arrester uses Zinc-Oxide Arrester.
Further, the pedestal is equipped with several mounting holes, and the pedestal is mounted on concrete column by bolt, described
Bolt and mounting hole cooperate.
The utility model has the following beneficial effects:
The utility model passes through the protection that is made of elements such as disconnecting switch, arrester, current transformer and discharging gaps
Device realizes neutral ground or earth-free two different methods of operation, to avoid transformer neutral point because being rushed by thunder and lightning
It hits and causes voltage to increase, damage to transformer insulated with failure；By the way that adjustable concrete column mounting seat is arranged, according to
Landform adjusts the height of concrete column, convenient in each landform protection device for installing.
Certainly, any product for implementing the utility model does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, make required for being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the structural schematic diagram using the protective device of GW13 outdoor disconnector；
Fig. 2 is the structural schematic diagram using the protective device of GW8 outdoor disconnector；
Fig. 3 is the structural schematic diagram of concrete column；
Fig. 4 is a kind of systematic schematic diagram of transformer neutral point grounding surge protective device.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
All other embodiment obtained, fall within the protection scope of the utility model.
In the description of the present invention, it should be understood that term " aperture ", "upper", "lower", " thickness ", "top",
" in ", " length ", "inner", indicating positions or the positional relationship such as " surrounding ", be merely for convenience of description the utility model and simplification
Description, rather than the component or element of indication or suggestion meaning must have a particular orientation, and are constructed and grasped with specific orientation
Make, therefore should not be understood as limiting the present invention.
It please refers to shown in Fig. 1-4, the utility model is a kind of transformer neutral point grounding surge protective device, including bottom
Seat 1, it is mutual that 1 upper surface of pedestal is separately installed with a disconnecting switch 2, arrester 3, counter of lightning arrester 4, discharging gap 5 and electric current
Sensor 6；
The lower surface of pedestal 1 is equipped with one or several concrete columns 7；
Arrester 3 is grounded after being connected in series with counter of lightning arrester 4；In order to which tour personnel is monitored, discharging gap 5
It is grounded after connecting with current transformer 6；
The top of disconnecting switch 2 is connect with the neutral point 901 of transformer 9；The Bottom ground of disconnecting switch 2；
The tandem compound of the tandem compound of arrester 3 and counter of lightning arrester 4, discharging gap 5 and current transformer 6 with
Disconnecting switch 2 is connected in parallel；
Discharging gap 5 is stick electrode；Use diameter for 16mm galvanized steel bar；One end of stick electrode is equipped with screw thread, spiral shell
Nut on the fixed mechanism of line and discharging gap 5 cooperates；The clearance distance of discharging gap 5 can according to circumstances be adjusted；
Concrete column 7 is equipped with several annular mounting bases 701；One hand control valve 8 is installed in mounting base 701；Control manually
Valve 8 processed is connect with disconnecting switch 2；Staff can control disconnecting switch 2 by hand control valve 8；
Concrete column 7 includes the first support column 702 and the second support column 703；The upper end of first support column 702 and pedestal 1 are solid
Fixed connection；The bottom end of second support column 703 is fixed on bottom surface；
The opposite sides of first 702 weeks sides of support column is respectively equipped with a guide groove 7021；The bottom of first support column 702
Face is equipped with a screw hole；
The upper surface intermediate active of second support column 703 is equipped with a lead screw bolt 704；Lead screw bolt 704 and first
The screw hole of 702 bottom surface of dagger cooperates, and drives the first support column 702 to glide in guide post 7031 by rotational lead screw bolt 704
It is dynamic, the height of adjustment base 1；
The two sides of lead screw bolt 704 are respectively equipped with a guide post 7031；Guide post 7031 and guide groove 7021 cooperate.
Wherein, disconnecting switch 2 uses GW13 outdoor disconnector or GW8 outdoor disconnector, is selected according to line condition
The disconnecting switch 2 of different model, wherein the current limit of GW13 outdoor disconnector is 630A, the limit of GW8 outdoor disconnector
Constant current is 400A.
Wherein, arrester 3 uses Zinc-Oxide Arrester.
Wherein, pedestal 1 is equipped with several mounting holes, and pedestal 1 is mounted on concrete column 7 by bolt, bolt and mounting hole
Cooperation.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the utility model
In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples
In can be combined in any suitable manner.
The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, also not limiting the utility model is only the specific embodiment.Obviously, according to this theory
The content of bright book can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably
The principles of the present invention and practical application are explained, so that skilled artisan be enable to better understand and utilize this
Utility model.The utility model is limited only by the claims and their full scope and equivalents.
Claims (4)
1. a kind of transformer neutral point grounding surge protective device, including pedestal (1), it is characterised in that: on the pedestal (1)
Surface is separately installed with a disconnecting switch (2), arrester (3), counter of lightning arrester (4), discharging gap (5) and current transformer
(6)；
The lower surface of the pedestal (1) is equipped with one or several concrete columns (7)；
The arrester (3) is grounded after being connected in series with counter of lightning arrester (4)；The discharging gap (5) and current transformer
(6) it is grounded after connecting；
The top of the disconnecting switch (2) is connect with the neutral point (901) of transformer (9)；The bottom of the disconnecting switch (2) connects
Ground；
The series connection of the tandem compound, discharging gap (5) and current transformer (6) of the arrester (3) and counter of lightning arrester (4)
Combination is connected in parallel with disconnecting switch (2)；
The discharging gap (5) is stick electrode；One end of the stick electrode is equipped with screw thread, the screw thread and discharging gap
(5) the nut cooperation on fixed mechanism；
The concrete column (7) is equipped with several annular mounting bases (701)；One is equipped on the mounting base (701) to manually control
Valve (8)；The hand control valve (8) connect with disconnecting switch (2)；
The concrete column (7) includes the first support column (702) and the second support column (703)；First support column (702) it is upper
End is fixedly connected with pedestal (1)；The bottom end of second support column (703) is fixed on bottom surface；
The opposite sides of all sides of first support column (702) is respectively equipped with a guide groove (7021)；First support column
(702) bottom surface is equipped with a screw hole；
The upper surface intermediate active of second support column (703) is equipped with a lead screw bolt (704)；The lead screw bolt
(704) cooperate with the screw hole of the first support column (702) bottom surface, drive the first support column (702) by rotational lead screw bolt (704)
It is slided up and down along guide post (7031), the height of adjustment base (1)；
The two sides of the lead screw bolt (704) are respectively equipped with a guide post (7031)；The guide post (7031) and guide groove
(7021) cooperate.
2. a kind of transformer neutral point grounding surge protective device according to claim 1, which is characterized in that it is described every
Pass (2) are left using GW13 outdoor disconnector or GW8 outdoor disconnector.
3. a kind of transformer neutral point grounding surge protective device according to claim 1, which is characterized in that described to keep away
Thunder device (3) uses Zinc-Oxide Arrester.
4. a kind of transformer neutral point grounding surge protective device according to claim 1, which is characterized in that the bottom
Seat (1) is equipped with several mounting holes, and the pedestal (1) is mounted on concrete column (7) by bolt, and the bolt is matched with mounting hole
It closes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822051676.XU CN209497254U (en) | 2018-12-07 | 2018-12-07 | A kind of transformer neutral point grounding surge protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822051676.XU CN209497254U (en) | 2018-12-07 | 2018-12-07 | A kind of transformer neutral point grounding surge protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209497254U true CN209497254U (en) | 2019-10-15 |
Family
ID=68152440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822051676.XU Expired - Fee Related CN209497254U (en) | 2018-12-07 | 2018-12-07 | A kind of transformer neutral point grounding surge protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209497254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787316A (en) * | 2020-12-30 | 2021-05-11 | 广东电网有限责任公司电力科学研究院 | Suppression device for transformer excitation surge current |
-
2018
- 2018-12-07 CN CN201822051676.XU patent/CN209497254U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787316A (en) * | 2020-12-30 | 2021-05-11 | 广东电网有限责任公司电力科学研究院 | Suppression device for transformer excitation surge current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191015 Termination date: 20211207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |