CN205882696U - Neutral point ground protecting device and photovoltaic transformer substation - Google Patents
Neutral point ground protecting device and photovoltaic transformer substation Download PDFInfo
- Publication number
- CN205882696U CN205882696U CN201620839782.2U CN201620839782U CN205882696U CN 205882696 U CN205882696 U CN 205882696U CN 201620839782 U CN201620839782 U CN 201620839782U CN 205882696 U CN205882696 U CN 205882696U
- Authority
- CN
- China
- Prior art keywords
- electric discharge
- neutral point
- protection device
- support
- metallic rod
- 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.)
- Active
Links
Landscapes
- Elimination Of Static Electricity (AREA)
Abstract
The utility model provides a neutral point ground protecting device and photovoltaic transformer substation, belonging to the field of electrical appliances, protection device includes the arrester, discharge device and support, the input and the neutral point of arrester are connected, the output is connected with the top of support, discharge device includes first metal pole, the first piece that discharges, second metal pole and the second piece that discharges, first metal pole one end is connected with the sheetmetal of arrester, the other end is connected with the first piece that discharges, second metal pole one end is connected with the first piece that discharges, the other end is connected with the top of support, first discharge piece and second discharge the piece and all are arc, first discharge piece and second discharge the piece and enclose into arc discharge gap jointly, discharge device is connected with grounding part. The transformer substation includes foretell protection device. The discharge gap's of this protection device and transformer substation electric field is very even, and the discharge voltage rate of accuracy is high, stability is high, and the dispersibility is little moreover, and protective properties is better, can effectively compensate prior art's defect.
Description
Technical field
This utility model relates to field of electrical equipment, in particular to a kind of grounding protection device of neutral point and photovoltaic
Transformer station.
Background technology
Transformer neutral point earth protection device is exclusively used in power transformer neutral point, to realize transformer neutral point ground connection
Run or two kinds of different methods of operation of earth-free operation, thus avoid, due to the system failure, causing transformer neutral point voltage
Raise, cause the infringement to transformator.
At present, the neutral point discharge gap of the transformer neutral point earth protection device that most domestic producer dispatches from the factory all is adopted
Use bar type gap, be characterized in low cost and convenient fixing, install simple.
But, nod gap is severe non-uniform electric field, and discharge voltage is unstable and dispersibility is big, thus determines its protectiveness
Energy poor (with reference to Fig. 1).Simultaneously as the difficult especially alignment in nod gap pinnacle, so field adjustable difficulty is big.
Utility model content
The purpose of this utility model is to provide a kind of grounding protection device of neutral point, its discharging gap electric fields uniform, puts
Piezoelectric voltage accuracy rate is high, stability is high, and dispersibility is little, and protective value is preferable；Meanwhile, two electric discharge sheets of its discharging gap
Being easy to align with, field adjustable is simple and convenient.
Another object of the present utility model is to provide a kind of photovoltaic transformer station, and it uses above-mentioned neutral ground to protect
Device, can effectively protect neutral point.
Embodiment of the present utility model is achieved in that
A kind of grounding protection device of neutral point, it includes spark gap, electric discharge device, support and earthing member, described lightning-arrest
The input of device is connected with neutral point, and outfan is connected with the top of described support, described electric discharge device include the first metallic rod,
First electric discharge sheet, the second metallic rod and the second electric discharge sheet, described first metallic rod one end connects with the input of described spark gap
Connect, the other end with described first electric discharge sheet is connected, described second metallic rod one end with described second discharge sheet be connected, the other end and
The top of described support connects, described first electric discharge sheet and described second electric discharge sheet all in circular arc, described first electric discharge sheet and
Described second electric discharge sheet surrounds arc discharging gap, described spark gap and described second metallic rod respectively with earthing member even jointly
Connect.
Further, in this utility model preferred embodiment, described first electric discharge sheet and described second electric discharge sheet
Surface is provided with silver coating.
Further, in this utility model preferred embodiment, described first metallic rod and described second metallic rod are equal
For expansion link.
Further, in this utility model preferred embodiment, described expansion link includes slide bar, sleeve and bolt,
Described slide bar one end is slidably connected in described sleeve, and the other end stretches out described sleeve, and the barrel of described sleeve is provided with spiral shell
Hole, described screw coordinates with described bolt thread, and described bolt can be pushed against by rotation or unclamp described slide bar.
Further, in this utility model preferred embodiment, also include disconnecting switch, operator link and operation machine
Structure, described disconnecting switch is arranged at the top of described support, and the input of described disconnecting switch is connected with electrical network, outfan with in
Property point connect, described operating mechanism is connected with described disconnecting switch by described operator link.
Further, in this utility model preferred embodiment, described operating mechanism is fixedly installed in institute by anchor ear
State on support.
Further, in this utility model preferred embodiment, described support is metal rack, and described earthing member is arranged
Bottom in described metal rack.
Further, in this utility model preferred embodiment, electric discharge device also includes switching summation current transformer, institute
The input stating current transformer is connected away from one end of described second electric discharge sheet with described second metallic rod, and outfan is with described
The top of support connects, and described switch is in parallel with described current transformer.
Further, in this utility model preferred embodiment, the top of described support is provided with metal pedestal, described in keep away
Thunder device and electric discharge device are arranged in described metal pedestal, and described support is provided with bracing piece, and described bracing piece two ends are cut with scissors respectively
Connecing with on described frame upper and described metal pedestal, described bracing piece, described metal pedestal and support are collectively forming triangle and add
Strong structure.
A kind of photovoltaic transformer station, it includes above-mentioned grounding protection device of neutral point.
This utility model embodiment provides the benefit that:
This grounding protection device of neutral point uses the electric discharge sheet of two arcs to surround the structure of arc discharging gap, and arc is put
The electric field in electricity gap is highly uniform, and discharge voltage accuracy rate is high, stability is high, and dispersibility is little, and protective value is preferable；Simultaneously
Owing to two electric discharge sheets of arc are easy to align with, therefore field adjustable is simple and convenient, can effectively make up the defect of prior art.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, will use required in embodiment below
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiment of the present utility model, the most should be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 is the electric field schematic diagram in the bar type gap of existing grounding protection device of neutral point；
The structural representation of the grounding protection device of neutral point that Fig. 2 provides for this utility model first embodiment；
The electric field schematic diagram of the arc discharging gap that Fig. 3 provides for this utility model first embodiment.
Reference collects:
Steel bracket 100；
Plain conductor 110；
Metal pedestal 120；
Bracing piece 130；
Spark gap 200；
First metallic rod 310；
Second metallic rod 320；
First electric discharge sheet 330；
Second electric discharge sheet 340；
Current transformer 400；
Disconnecting switch 500；
Operator link 600；
Operating mechanism 700.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that retouched
The embodiment stated is a part of embodiment of this utility model rather than whole embodiments.Generally described in the accompanying drawing herein and
The assembly of this utility model embodiment illustrated can be arranged with various different configurations and design.
Therefore, below the detailed description of the embodiment of the present utility model provided in the accompanying drawings is not intended to limit requirement
The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in this utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of this utility model protection.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, or
It is the orientation or position relationship usually put during the use of this utility model product, is for only for ease of description this utility model and letter
Change describe rather than instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd " etc. are only used for district
Divide and describe, and it is not intended that indicate or hint relative importance.
Additionally, the term such as term " level ", " vertically " is not offered as requiring parts abswolute level or pendency, but can be slightly
Low dip.As " level " only refers to for its direction relatively " vertically " more level, it is not that this structure of expression must be complete
Full level, but can be slightly tilted.
In description of the present utility model, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " sets
Put ", should be interpreted broadly " installation ", " being connected ", " connection ", connect for example, it may be fixing, it is also possible to be to removably connect,
Or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to pass through intermediary
It is indirectly connected to, can be the connection of two element internals.For the ordinary skill in the art, can manage with concrete condition
Solve above-mentioned term concrete meaning in this utility model.
First embodiment:
Refer to Fig. 2-3, the present embodiment provides a kind of grounding protection device of neutral point, it include support, spark gap 200,
Electric discharge device, disconnecting switch 500, operator link 600 and operating mechanism 700.
Wherein, support is metal rack, and it can use various metal material to make, such as steel bracket in the present embodiment
100, it is high that steel have intensity, the feature of low cost, can reduce the cost of support while ensureing support intensity.Steel bracket
100 in cylinder, and it includes top and bottom.
The bottom of steel bracket 100 is provided with mounting base and earthing member, and mounting base is perpendicular to the axis of steel bracket 100,
Installing and be provided with multiple installation through hole on floor, multiple installation through holes are arranged around the axis uniform intervals of steel bracket 100.Ground connection
Part can be to use various structures and form, and in the present embodiment, earthing member uses plain conductor 110, and plain conductor 110 one end connects
In steel bracket 100 near the position of the first end.Plain conductor 110 is arranged at and can effectively reduce metal bottom steel bracket 100 and lead
The length of line 110, on the one hand facilitates the layout of plain conductor 110, and the material that on the other hand can reduce plain conductor 110 becomes
This.
During installation, first the pre-buried many screw rods with nut on the ground of installation site, then make many screw rods be positioned at
Ground position, through installing through hole accordingly, screws nut afterwards so that it is compress the upper surface installing floor, finally by gold
Belong to the wire 110 introducing subsurface in one end away from steel bracket 100, so achieve that the fixing of steel bracket 100 and plain conductor
The installation of 110.After installation, the axis of steel bracket 100 is approximately perpendicular to horizontal plane.The top of steel bracket 100 arranges and has contacted
The metal pedestal 120 of strip, the length direction of metal pedestal 120 is perpendicular to the axis direction of steel bracket 100.
Spark gap 200 is prior art, and it arranges and be contacted with in metal pedestal 120 and length direction and steel bracket 100
Axis direction is identical.The input of spark gap 200 is connected with neutral point, and outfan is connected with the top of steel bracket 100.
Electric discharge device is arranged in metal pedestal 120, and it includes first metallic rod the 310, first electric discharge sheet the 330, second gold medal
Belong to bar 320 and the second electric discharge sheet 340.The length direction of the first metallic rod 310 is perpendicular to the axis direction of steel bracket 100, its
One end is connected with the input of spark gap 200, and the other end and the first electric discharge sheet 330 connect.Second metallic rod 320 is L-shaped, one
Holding and be connected with the second electric discharge sheet 340, the other end connects with the top of steel bracket 100 and contacts.First electric discharge sheet 330 and second is put
Electricity sheet 340 is all in circular arc, and the first electric discharge sheet 330 and the second electric discharge sheet 340 surround arc discharging gap jointly.
In order to improve the first electric discharge sheet 330 and discharge capability of the second electric discharge sheet 340, in the present embodiment, the first electric discharge sheet
330 and second electric discharge sheet 340 surface be provided with silver coating.
So that user can be according to the size of practical situation regulation arc discharging gap, in the present embodiment, the first gold medal
Belong to bar 310 and the second metal sense is expansion link.Flexible by the first metallic rod 310 and the second metallic rod 320, can increase
Or reduce the width of arc discharging gap so that arc discharging gap is in optimum Working, improve the guarantor of centering point
Protect effect.
Above-mentioned expansion link can be to use various structures and form, and in the present embodiment, expansion link includes slide bar, sleeve and spiral shell
Bolt, slide bar one end is slidably connected in sleeve, and the other end stretches out sleeve.Screw, screw and bolt it is provided with on the barrel of sleeve
Threaded engagement, bolt can be pushed against by rotation or unclamp slide bar.
When needing the size regulating arc discharging gap, first swivel bolt unclamps slide bar, then pulls slide bar, regulation to stretch
Contracting bar is to the length needed, and then swivel bolt pushes against slide bar, operates very convenient.
Disconnecting switch 500 is arranged at the top of support, and the input of disconnecting switch 500 is connected with electrical network, outfan with in
Property point connect, operating mechanism 700 is connected with disconnecting switch 500 by operator link 600.Operating mechanism 700 is fixed by anchor ear
It is installed on steel bracket 100.The purpose arranging disconnecting switch 500 is to cut off the connection of electrical network and neutral point, thus has
Effect avoids the destruction of the instantaneous pressure centering point of electrical network.
Further, in the present embodiment, electric discharge device also includes switching summation current transformer 400, current transformer 400
Input and the second metallic rod 320 connect away from second one end discharging sheet 340, and outfan is connected with the top of support, switch
In parallel with described current transformer 400.The purpose arranging current transformer 400 is big electric current to be converted into small area analysis, in order to
Detection.It should be noted that current transformer 400 under normal circumstances can, Guan Bi switch so that it is short circuit.Need
Switch is just disconnected so that it is access circuit work during use.
Further, in the present embodiment, steel bracket 100 being provided with bracing piece 130, bracing piece 130 two ends are respectively articulated with
With on steel bracket 100 top and metal pedestal 120, bracing piece 130, metal pedestal 120 and steel bracket 100 are collectively forming triangle and add
Strong structure.The purpose arranging bracing piece 130 is to improve the structural strength of whole steel bracket 100, thus improves whole ground connection and protect
The stability of protection unit.
The present embodiment additionally provides a kind of photovoltaic transformer station, and it includes above-mentioned grounding protection device of neutral point.
In sum, this grounding protection device of neutral point uses the electric discharge sheet of two arcs to surround the knot of arc discharging gap
Structure, the electric field of arc discharging gap is highly uniform, and discharge voltage accuracy rate is high, stability is high, and dispersibility is little, protective value
Preferably；Simultaneously because the two of arc electric discharge sheets are easy to align with, therefore field adjustable is simple and convenient, can effectively make up existing skill
The defect of art.
Second embodiment:
The present embodiment provides a kind of grounding protection device of neutral point, the technology effect of its unitary construction, operation principle and acquirement
Fruit is essentially identical with first embodiment, and difference is spark gap 200 and the concrete form of electric discharge device ground connection.
In the present embodiment, support uses cement support, and earthing member uses metallic rod, metallic rod one end and metal pedestal 120
Connecting, the other end inserts subsurface just may be used.Said structure can be grounded protection effect as the structure in first embodiment
Really.
These are only preferred embodiment of the present utility model, be not limited to this utility model, for this area
Technical staff for, this utility model can have various modifications and variations.It is all within spirit of the present utility model and principle,
Any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (10)
1. a grounding protection device of neutral point, it is characterised in that include spark gap, electric discharge device, support and earthing member, institute
The input stating spark gap is connected with neutral point, and outfan is connected with the top of described support, and described electric discharge device includes first
Metallic rod, the first electric discharge sheet, the second metallic rod and the second electric discharge sheet, described first metallic rod one end is defeated with described spark gap
Entering end to connect, the other end is connected with described first electric discharge sheet, and described second metallic rod one end is connected, separately with described second electric discharge sheet
One end is connected with the top of described support, and described first electric discharge sheet and described second electric discharge sheet are all in circular arc, and described first puts
Electricity sheet and described second electric discharge sheet jointly surround arc discharging gap, described spark gap and described second metallic rod respectively with ground connection
Part connects.
Grounding protection device of neutral point the most according to claim 1, it is characterised in that described first electric discharge sheet and described the
The surface of two electric discharge sheets is provided with silver coating.
Grounding protection device of neutral point the most according to claim 1, it is characterised in that described first metallic rod and described
Two metallic rod are expansion link.
Grounding protection device of neutral point the most according to claim 3, it is characterised in that described expansion link includes slide bar, set
Cylinder and bolt, described slide bar one end is slidably connected in described sleeve, and the other end stretches out described sleeve, the barrel of described sleeve
On be provided with screw, described screw coordinates with described bolt thread, and described bolt can be pushed against by rotation or unclamp described cunning
Bar.
Grounding protection device of neutral point the most according to claim 1, it is characterised in that also include disconnecting switch, operation even
Bar and operating mechanism, described disconnecting switch is arranged at the top of described support, and the input of described disconnecting switch is with electrical network even
Connecing, outfan is connected with neutral point, and described operating mechanism is connected with described disconnecting switch by described operator link.
Grounding protection device of neutral point the most according to claim 5, it is characterised in that described operating mechanism is solid by anchor ear
Dingan County is loaded on described support.
Grounding protection device of neutral point the most according to claim 1, it is characterised in that described support is metal rack, institute
State earthing member and be arranged at the bottom of described metal rack.
Grounding protection device of neutral point the most according to claim 1, it is characterised in that electric discharge device also includes switch and electricity
Current transformer, the input of described current transformer is connected away from one end of described second electric discharge sheet with described second metallic rod,
Outfan is connected with the top of described support, and described switch is in parallel with described current transformer.
Grounding protection device of neutral point the most according to claim 1, it is characterised in that the top of described support is provided with gold
Belonging to seat, described spark gap and electric discharge device are arranged in described metal pedestal, and described support is provided with bracing piece, described bracing piece
Two ends are hingedly connected in described frame upper and described metal pedestal, described bracing piece, described metal pedestal and the common shape of support
Triangularity reinforcement structure.
10. a photovoltaic transformer station, it is characterised in that include the neutral ground protection described in claim 1-9 any one
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839782.2U CN205882696U (en) | 2016-08-04 | 2016-08-04 | Neutral point ground protecting device and photovoltaic transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839782.2U CN205882696U (en) | 2016-08-04 | 2016-08-04 | Neutral point ground protecting device and photovoltaic transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205882696U true CN205882696U (en) | 2017-01-11 |
Family
ID=57700985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620839782.2U Active CN205882696U (en) | 2016-08-04 | 2016-08-04 | Neutral point ground protecting device and photovoltaic transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205882696U (en) |
-
2016
- 2016-08-04 CN CN201620839782.2U patent/CN205882696U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102135587A (en) | Fault monitoring method and system of power line | |
| CN202930802U (en) | Movable type distribution transformer allowing uninterruptible power supply mounting and dismounting | |
| CN205882696U (en) | Neutral point ground protecting device and photovoltaic transformer substation | |
| CN103323759A (en) | Test platform of parallel protective gap of transformer neutral point | |
| CN104124680A (en) | Arc harmonic elimination, line selection and overvoltage protection device | |
| CN208834829U (en) | A kind of porcelain pole arm type arrester with series gaps | |
| CN107785882A (en) | A kind of more level active compensation devices of three-phase four-arm and control method | |
| CN207925289U (en) | A kind of open-type zero sequence current mutual inductor | |
| CN207800931U (en) | Detachable finger-contact type ground wire and earthing or grounding means | |
| CN209497254U (en) | A kind of transformer neutral point grounding surge protective device | |
| CN109004569A (en) | A kind of totally-enclosed switch cabinet bus grounding device and application method | |
| CN211136931U (en) | Special butt joint instrument of GIS | |
| CN209313343U (en) | A kind of construction building cable bearer | |
| Lacoursiere | Steel utility poles: advantages and applications | |
| CN105356306A (en) | Mounting structure for grouping automatic switching compensation cabinet | |
| CN207069254U (en) | 500kV ground wire assembly and disassembly servicing units | |
| CN203434593U (en) | Neutral-point gap ground protection apparatus of transformer | |
| KR102642322B1 (en) | Grounding device for power transmission | |
| CN207441370U (en) | A kind of Novel lightning arrester | |
| Kamble et al. | Load-flow Analysis of Distribution systems using ETAP | |
| CN218958033U (en) | Portable grounding device | |
| CN216436763U (en) | Open-type cable branch station | |
| CN218216118U (en) | Grounding wire device for high-voltage switch cabinet | |
| CN216054516U (en) | High-voltage interrupter base | |
| CN213125070U (en) | External creel stand for power distribution control cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |