CN208352978U - A kind of excess voltage suppressor - Google Patents
A kind of excess voltage suppressor Download PDFInfo
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- CN208352978U CN208352978U CN201821181703.9U CN201821181703U CN208352978U CN 208352978 U CN208352978 U CN 208352978U CN 201821181703 U CN201821181703 U CN 201821181703U CN 208352978 U CN208352978 U CN 208352978U
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- voltage suppressor
- conductor
- excess voltage
- outer conductor
- internal protection
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Abstract
This application discloses a kind of excess voltage suppressors, comprising: the outer conductor of tubular；The internal protection conductor of outer conductor is set, and the interconnecting piece and outer conductor of internal protection conductor are electrically connected, and internal protection conductor has wire connecting portion；One end is electrically connected with wire connecting portion, and the other end is electrically connected with interconnecting piece, with the transient voltage suppressor diode being arranged in parallel with internal protection conductor；Connector has the outer tube for being socketed and being electrically connected with outer conductor, and the interior junctor being electrically connected in outer tube and with wire connecting portion.Above-mentioned excess voltage suppressor; other not set protection class components of the inside of outer conductor; so that the structure of excess voltage suppressor is more simple; cost is lower; with smaller volume and weight; and the response characteristic of the unprotected element of dash current ability that entire excess voltage suppressor is able to bear influences, so that the protective value of excess voltage suppressor is more reliable.
Description
Technical field
The utility model relates to Electric Power Equipment Insulation state inspection fields, in particular to for GIS ultrahigh frequency part
A kind of excess voltage suppressor of discharge measuring.
Background technique
Cubicle Gas-Insulated Switchgear (abbreviation GIS device) is the critical elements in electric system, its own can
By sexual intercourse to the safe and stable operation of entire electric power networks.It is direct monitoring and assessment using superfrequency method detection shelf depreciation
One of the important means of GIS device state of insulation, is also widely applied in power grid at present.However GIS device is in reality
Can have by the impact of thunder and lightning and Frequency Transient Overvoltage, while when acutely electric discharge occurring inside the equipment in the operation of border
The ultra high-frequency partial discharge sensor that may cause in GIS device is coupled to overvoltage signal.Therefore, it is necessary in superfrequency office
Parallel connection excess voltage suppressor at the output interface of portion's discharge sensor, with the person and the instrument safety at protection end.
The frequency range of all kinds of overvoltage is generally in 100MHz hereinafter, and ultra high-frequency partial discharge sensor in GIS device
Working band be typically distributed between 300MHz~1.5GHz.Therefore the effect of excess voltage suppressor can be seen as high pass filter
Wave device, i.e., in 100MHz low resistive state presented below, all kinds of overvoltage that can incude ultra high-frequency partial discharge sensor are believed
It number clamps down near low potential, and there is certain impedance in high band, do not influence detection system to local discharge signal
Measurement.
Currently, the excess voltage suppressor generallyd use is high voltage surge formula excess voltage suppressor, it is by excessively electric mostly
It presses between the inner conductor and outer conductor of suppressor and each quasi-nonlinear protection such as connect varistor, gas-discharge tube, discharging gap
Element or combinations thereof realizes the defencive function to GIS equipment partial discharge measurement circuit.But the addition of these protection elements increases
Add the complexity of suppressor, and does not have preferable frequency selective characteristic.And in field of radio frequency communication, using 1/4 wavelength
Short-circuiting device principle design coaxial over-voltage suppressor be also widely used, but the working band of this kind of excess voltage suppressor compared with
It is narrow, it is unsatisfactory for the broadband test demand of GIS device superfrequency Partial Discharge Detection.
Utility model content
In view of this, the present invention provides a kind of excess voltage suppressors, and compared with existing structure, structure is simpler
List, volume are smaller, and more preferably to the protecting effect in GIS equipment partial discharge measurement circuit.
In order to achieve the above object, the utility model provides the following technical solutions:
A kind of excess voltage suppressor, comprising:
The outer conductor of tubular；
Internal protection conductor inside the outer conductor is set, and the interconnecting piece of the internal protection conductor is led outside with described
Body is electrically connected, and the internal protection conductor has wire connecting portion；
One end is electrically connected with the wire connecting portion, and the other end is electrically connected with the interconnecting piece, with the internal protection conductor
The transient voltage suppressor diode being arranged in parallel；
Connector has the outer tube that be socketed and be electrically connected with the outer conductor, and in the outer tube and with it is described
The interior junctor that wire connecting portion is electrically connected.
Preferably, in above-mentioned excess voltage suppressor, the material of the internal protection conductor is brass, and includes:
Cake body, the cake body are the interconnecting piece, and the circumferential side wall and the outer conductor for passing through the cake body
Circumferential inner wall be fitted and connected, to realize the connection of the internal protection conductor and the outer conductor；
The coaxially connected cylindrical body on the cake body, the cylindrical body are the wire connecting portion.
Preferably, in above-mentioned excess voltage suppressor, the cake body and the outer conductor are realized by screw thread and are connected.
It preferably, further include being arranged in the inner cavity of the outer conductor, and be located in described in above-mentioned excess voltage suppressor
The sealing end of portion protection side of the conductor far from the connector.
Preferably, in above-mentioned excess voltage suppressor, the outer conductor and the outer tube of socket are relatively rotatable to each other, and
The material of the two is identical.
Preferably, in above-mentioned excess voltage suppressor, the connector is the N-type of the interior junctor and outer coaxial tube setting
Connector, BNC type connector or SMA type connector.
Preferably, in above-mentioned excess voltage suppressor, the wire connecting portion offers jack on the end face far from the interconnecting piece,
The interior junctor is the contact pin being inserted into the jack, and the interior junctor and the interconnecting piece weld.
It preferably, further include the round pie insulator being arranged in the outer tube bore, institute in above-mentioned excess voltage suppressor
State the centre that interior junctor passes through the insulator.
Excess voltage suppressor provided by the utility model, internal protection conductor and outer conductor are directly electrical connection, such
Design structure make excess voltage suppressor in the overvoltage frequency range of GIS device approximately ground, in superfrequency shelf depreciation
Working sensor frequency range then has the impedance value of particular range, can satisfy the wideband of GIS device superfrequency measurement of partial discharge
Band area requirement, and the transient voltage suppressor diode for being connected to internal protection conductor both ends also can be to the superfrequency of shelf depreciation
Discharge path is provided more than the strong discharge signal of threshold value in local discharge sensor working band, and the inside of outer conductor is not set
Other protection class components are set, so that the structure of excess voltage suppressor is more simple, cost is lower, with smaller volume and again
Amount, and the response characteristic for the unprotected element of dash current ability that entirely excess voltage suppressor is able to bear influences, so that mistake
The protective value of voltage suppressor is more reliable.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the cross-sectional view of excess voltage suppressor provided by the embodiment of the utility model；
Fig. 2 is that excess voltage suppressor is schemed in the Smith of the impedance measurements of 5Hz to 3GHz frequency range；
Fig. 3 is the structural schematic diagram of excess voltage suppressor, GIS device and test cable cooperation.
In Fig. 1-Fig. 3:
1- outer conductor, 2- internal protection conductor, 3- transient voltage suppressor diode, 4- connector, 5- seal end, 6- insulation
Body, 7-GIS ontology, 8- three-way connection, 9- test cable, 10- ultra high-frequency partial discharge sensor；
21- cake body, 22- cylindrical body, 41- outer tube, junctor in 42-.
Specific embodiment
The utility model provides a kind of excess voltage suppressor, compared with existing structure, structure is simpler, volume more
It is small, and more preferably to the protecting effect in GIS equipment partial discharge measurement circuit.
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 making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1-Figure 3, excess voltage suppressor provided by the embodiment of the utility model, for being mounted on GIS device,
It is main including outer conductor 1, internal protection conductor 2, transient voltage suppressor diode 3 and connecing with outer tube 41 and interior junctor 42
First 4.Wherein, outer conductor 1 is tubular structure, and with inner cavity, and internal protection conductor 2 is then arranged in the inner cavity of outer conductor 1,
Internal protection conductor 2 has interconnecting piece and inlet wire portion, the two parts are located at the both ends of internal protection conductor 2, Ke Yili
Solution is two ends of internal protection conductor 2, and interconnecting piece realizes internal protection conductor 2 by the connection of the inner wall with outer conductor 1
With the electric connection of outer conductor 1, and transient voltage suppressor diode 3 is then similarly positioned in the inner cavity of outer conductor 1, and is protected with inside
Body 2 is protected and led to be arranged in parallel, particularly one end of transient voltage suppressor diode 3 is electrically connected with wire connecting portion, the other end with connect
Portion's electrical connection, the interior junctor 42 that connector 4 has outer tube 41 and is arranged in outer tube 41, outer tube 41 are inserted on outer conductor 1 to realize
The socket of the two, and be also electrically connected, while interior junctor 42 is also electrically connected with the wire connecting portion of internal protection conductor 2.Wherein,
It is preferred that the breakdown voltage of transient voltage suppressor diode 3 (i.e. two-way TVS pipe) is 10V, and it passes through two lead end difference
Aperture is welded on internal protection conductor 2, to realize two poles of electric connection and transient voltage inhibition with internal protection conductor 2
Fixation of the pipe 3 on internal protection conductor 2.
The excess voltage suppressor of above structure can satisfy the protection requirement in GIS equipment partial discharge measurement circuit, avoid
It is destroyed by high pressure.In a certified embodiment, excess voltage suppressor has low impedance characteristic in 100MHz or less,
Therefore when the ultra high-frequency partial discharge sensor 10 of GIS device senses overvoltage, excess voltage suppressor can be by overvoltage
Signal is directed in grounding shell, to prevent equipment or operator of all kinds of induced overvoltage signals to 9 side of test cable
Member damages；And in superfrequency working frequency range, excess voltage suppressor has the impedance of tens of Ohms, can satisfy GIS device
The measurement demand of shelf depreciation.
In order to advanced optimize technical solution, in excess voltage suppressor provided in this embodiment, the material of internal protection conductor 2
Matter is brass, and as shown in Figure 1, enabling internal protection conductor 2 includes: cake body 21, this cake body 21 is interconnecting piece, and is passed through
The circumferential side wall of cake body 21 and the circumferential inner wall of outer conductor 1 are fitted and connected, to realize internal protection conductor 2 and outer conductor 1
Connection；The coaxially connected cylindrical body 22 on cake body 21, this cylindrical body 22 are wire connecting portion.It is preferably internal to protect in the present embodiment
The material for protecting and leading body 2 is brass, is because brass is easy to process and has preferable electric conductivity compared with other materials.And
The structure structure coaxially connected using cake body 21 and cylindrical body 22, so that the cross sectional shape of protection conductor is T-type in entire, from
The high stability of body structure, and when being connect with outer conductor 1, it is the circumferential side wall and outer conductor 1 by cake body 21
Circumferential inner wall is fitted and connected and realizes, so that the two has bigger connection, conductive area, connectivity robustness and leads
It is electrically also higher.It is also preferable to which cake body 21 and cylindrical body 22 are structure as a whole.
More preferred, cake body 21 and outer conductor 1 are realized by screw thread and are connected.Such set-up mode enables to inside
It can dismantle, be replaced convenient for the maintenance of component, and the adjusting for the degree that is connected firmly between protection conductor 2 and outer conductor 1.
It further include being arranged in the inner cavity of outer conductor 1, and internally positioned protection conductor 2 is far from connector 4 in the present embodiment
The sealing end 5 of side, sealing end 5 are protruding to except the inner cavity of outer conductor 1, as shown in figures 1 and 3.Outer conductor 1 and connector
After 4 complete assembly, sealing end preferably is formed using epoxide resin material casting is fixed in the one end of outer conductor 1 far from connector 4
5, to realize that internal protection conductor 2 is isolated with extraneous, it can further promote the structural strength of excess voltage suppressor and close
Sealing strength.
Further, the outer conductor 1 and outer tube 41 for also enabling socket are relatively rotatable to each other, and the material of the two is identical.Make
Outer conductor 1 and outer tube 41 are processed with same material, electric conductivity between the two can be further increased, and enables the two can phase
To rotation, then excess voltage suppressor provided in this embodiment is enabled to realize installation and removal, inspection convenient for safeguarding in use
It repairs.
Specifically, it is preferred that connector 4 be interior junctor 42 be coaxially disposed with outer tube 41 N Connector, BNC type connector or
SMA type connector.These types of connector is common connector, convenient for materials, is conducive to technical side provided in this embodiment
The realization of case.
In addition, wire connecting portion is the contact pin being inserted into jack far from jack, interior junctor 42 is offered on the end face of interconnecting piece,
And interior junctor 42 is welded with interconnecting piece.On the end face of cylindrical wire connecting portion, the axis direction along wire connecting portion reserves one
The jack that can be inserted by contact pin, the aperture of this jack are slightly larger than the diameter of contact pin, and when assembling by welding procedure by this
The two connection, can further increase the connection effect of the two.
As shown in Figure 1, the excess voltage suppressor in the present embodiment further includes that the round pie that is arranged in 41 inner cavity of outer tube is exhausted
Edge body 6, interior junctor 42 pass through the centre of insulator 6.The outer diameter of insulator 6 is matched with the internal diameter of outer conductor 1, to make
It obtains and is connected and fixed between outer tube 41 and interior junctor 42 by the realization of insulator 6 of round pie, to guarantee the structural stability of connector 4
And insulating properties, this insulator 6 can select polytetrafluoroethylene material, and position along axis direction is inscribed in its center
Body 42 reserves a mounting hole.
As shown in Fig. 2, it is the excess voltage suppressor that is provided using Network Analyzer to embodiment in 5Hz to 3GHz frequency
The Smith of impedance measurements in range schemes.In entire test frequency range, overvoltage suppression it can be seen from graphical results
The impedance of device processed is justified close to the equal resistance that resistance is 0 Ω, and shows low-resistance characteristic in low-frequency range excess voltage suppressor, and
Super high band then has certain impedance.By consulting test result it is found that excess voltage suppressor is in 100MHz impedance below
Less than 0.5 Ω, approximately ground；And in the working frequency range of the ultra high-frequency partial discharge sensor of 300MHz to 1.5GHz 10, impedance
It can satisfy GIS device part to excess voltage suppressor provided in this embodiment between 100 Ω, is further demonstrated between 10 Ω
It discharges wide band measurement request, specific impedance value can be by adjusting the structure of the internal protection conductor 2 of excess voltage suppressor
Size and realize.
Preferably, excess voltage suppressor is connect by three-way connection 8 with GIS ontology 7, test cable 9, as shown in Figure 3.This
Embodiment provide excess voltage suppressor when in use, by coaxial three-way connection 8 respectively with the superfrequency office in GIS device
Portion's discharge sensor 10 is connected with test cable 9.Wherein excess voltage suppressor, ultra high-frequency partial discharge sensor 10, test
Cable 9 and threeway jointing 4 all use the connector 4 of same size.In a kind of preferred structure, connector 4 and three-way connection 8 are equal
Select N connector, when ultra high-frequency partial discharge sensor 10 is coupled to the overvoltage signal of GIS device, excess voltage suppressor
It can directly be passed through to the release of internal protection conductor 2 into grounding shell, thus avoid high-voltage signal occur in test cable 9,
Realize the effective protection to test loop.
Since GIS device uses excess voltage suppressor provided by the above embodiment, so the GIS device is pressed down by overvoltage
Device bring beneficial effect processed please refers to corresponding part in above-described embodiment, and details are not described herein.
Each part is described in a progressive manner in this specification, what the structure of each part stressed is
With the difference of existing structure, the entirety and part-structure of excess voltage suppressor can pass through the structure of the above-mentioned multiple portions of combination
And it obtains.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (8)
1. a kind of excess voltage suppressor characterized by comprising
The outer conductor of tubular；
Internal protection conductor inside the outer conductor, the interconnecting piece of the internal protection conductor and outer conductor electricity are set
Property connection, and the internal protection conductor have wire connecting portion；
One end is electrically connected with the wire connecting portion, and the other end is electrically connected with the interconnecting piece, in parallel with the internal protection conductor
The transient voltage suppressor diode of setting；
Connector has the outer tube that be socketed and be electrically connected with the outer conductor, and in the outer tube and with the wiring
The interior junctor that portion is electrically connected.
2. excess voltage suppressor according to claim 1, which is characterized in that the material of the internal protection conductor is Huang
Copper, and include:
Cake body, the cake body is the interconnecting piece, and passes through the circle of the circumferential side wall of the cake body and the outer conductor
All inner walls are fitted and connected, to realize the connection of the internal protection conductor and the outer conductor；
The coaxially connected cylindrical body on the cake body, the cylindrical body are the wire connecting portion.
3. excess voltage suppressor according to claim 2, which is characterized in that the cake body and the outer conductor pass through spiral shell
Line realizes connection.
4. excess voltage suppressor according to claim 1, which is characterized in that further include the inner cavity that the outer conductor is arranged in
In, and it is located at the sealing end of the side of the internal protection conductor far from the connector.
5. excess voltage suppressor according to claim 1, which is characterized in that the outer conductor of socket and the outer tube energy
It is enough to relatively rotate, and the material of the two is identical.
6. excess voltage suppressor according to claim 2, which is characterized in that outside the connector is the interior junctor and is described
N Connector, BNC type connector or the SMA type connector of pipe coaxial arrangement.
7. excess voltage suppressor according to claim 6, which is characterized in that end of the wire connecting portion far from the interconnecting piece
Offer jack on face, the interior junctor is the contact pin being inserted into the jack, and the interior junctor and the interconnecting piece
Welding.
8. excess voltage suppressor according to any one of claims 1-7, which is characterized in that further include being arranged described
Round pie insulator in outer tube bore, the interior junctor pass through the centre of the insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821181703.9U CN208352978U (en) | 2018-07-24 | 2018-07-24 | A kind of excess voltage suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821181703.9U CN208352978U (en) | 2018-07-24 | 2018-07-24 | A kind of excess voltage suppressor |
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| Publication Number | Publication Date |
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| CN208352978U true CN208352978U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821181703.9U Active CN208352978U (en) | 2018-07-24 | 2018-07-24 | A kind of excess voltage suppressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596545A (en) * | 2019-09-04 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection device and detection method based on combined action of alternating current and impulse voltage |
-
2018
- 2018-07-24 CN CN201821181703.9U patent/CN208352978U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596545A (en) * | 2019-09-04 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection device and detection method based on combined action of alternating current and impulse voltage |
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