CN205910292U - Arrester reveal current shield device - Google Patents

Arrester reveal current shield device Download PDF

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Publication number
CN205910292U
CN205910292U CN201620382093.3U CN201620382093U CN205910292U CN 205910292 U CN205910292 U CN 205910292U CN 201620382093 U CN201620382093 U CN 201620382093U CN 205910292 U CN205910292 U CN 205910292U
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CN
China
Prior art keywords
radome
leakage current
spark gap
screening arrangement
current screening
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
Application number
CN201620382093.3U
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Chinese (zh)
Inventor
张翼
罗涛
王瑞新
林雪原
黄建国
张阳
胡国青
叶朝辉
郑开
曾璧环
骆炫忠
程晖
黄康乐
林建达
孔凡坊
吴旭鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Wenzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Power Construction of Wenzhou
Original Assignee
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Wenzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Power Construction of Wenzhou
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Zhejiang Electric Power Co Ltd, Wenzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd, Power Construction of Wenzhou filed Critical State Grid Corp of China SGCC
Priority to CN201620382093.3U priority Critical patent/CN205910292U/en
Application granted granted Critical
Publication of CN205910292U publication Critical patent/CN205910292U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an arrester reveal current shield device, include: the shield cover, shield cover installation and parcel are outside at the high -pressure side of arrester, and the shield cover designs into the high -pressure side molding of parcel arrester, is carrying out arrester high voltage DC when experimental, because the stray current of the less production of spatial distance shields, and when test, directly can accomplish in the cubical switchboard when can be with arrester high voltage DC experimental, saves and removes and installing lightning arrester's process afterwards, has improved the work efficiency and the security of experiment.

Description

A kind of Leakage Current screening arrangement of spark gap
Technical field
This utility model is related to technical field of power systems, the Leakage Current shielding dress of more particularly to a kind of spark gap Put.
Background technology
Spark gap is a very important equipment in electric substation, mainly for the protection of electrical equipment from thunder and lightning and various Overvoltage injury simultaneously limits time of afterflow.It is applied to transformator, transmission line of electricity, switch cubicle, electric metering box etc..In normal work When, it assumes high-impedance state, and only microampere order electric current passes through, and under the effect of overvoltage high current, it just assumes low resistance, from And limit the residual voltage of spark gap.For example, need according to the rules to newly put into operation and overhaul after Zinc-Oxide Arrester carry out direct current Reference voltage u under 1ma1M a and 0.75u1Under m a voltage, the test (abbreviation DC high potential test afterwards) of leakage current is it may be assumed that straight Voltage u under stream 1ma1M a (abbreviation u afterwards1M a) for metal oxide arrester two ends pass through 1ma DC current when, spark gap The magnitude of voltage at two ends;0.75u1Leakage current (abbreviation imoa afterwards) under m a voltage, is the u that test product two ends apply 75%1M a electricity Pressure, flows through the DC leakage-current of spark gap.u1M a and imoaChange can directly reflect aging, the degree of metamorphism of spark gap. Particularly to the spark gap being assembled using large-area metal oxide resistor piece and in parallel the keeping away of multicolumn metal oxide resistance Thunder device, this test can be easy to judge their mass defect, particularly important to the safe and reliable operation of Zinc-Oxide Arrester.
At present, existing spark gap DC high potential test method, needs to remove the spark gap in switch cubicle and takes outside cabinet Tested, as shown in figure 1, the equivalent circuit diagram tested in switch cubicle for Zinc-Oxide Arrester, the surveyed electricity of test of lightning arrester Flow valuve is: is=imoa+i0, wherein, imoaFor the leakage current values of spark gap itself, can truly reflect lightning arrester insulation status;i0 For extraneous stray electrical current interference value, if pressure gap is less during test of lightning arrester, its stray electrical current electric current is bigger, and spark gap is tried The impact testing result is bigger.It is primarily due to space in switch cubicle excessively compact, if directly carrying out straight in switch cubicle Stream high-potting, the voltage of spark gap DC high potential test is higher, close together with nearby device is easy for producing stray electrical current i0So that actual measurement electric current isFor imoaWith i0Sum, i0Interference make measurement result can not react the actual feelings of spark gap Condition.And all of spark gap is all removed to outside and is tested, one carrys out the huge efficiency making experiment work of workload significantly Reduce, two are likely to damage can be caused to bring safe mass hidden danger spark gap the process to remove.
Utility model content
The purpose of this utility model is to propose a kind of Leakage Current screening arrangement of spark gap, can be by spark gap direct current Because the stray electrical current of the less generation of space length masks during high-potting, then the DC high potential test of spark gap just can be Complete in switch cubicle, save remove and zinc oxide surge arresters afterwards operation, improve work efficiency and the safety of test.
For reaching above-mentioned purpose, this utility model provides technical scheme below:
The Leakage Current screening arrangement of a kind of spark gap, comprising: radome, high-voltage connection and connector or conduct Part, wherein,
Described radome is installed and is wrapped in outside the high-pressure side of described spark gap;
The inside of described radome, the other end and described spark gap are fixed in described connector or the one end conducting part High-pressure side carries out joint connection, and described high-voltage connection is fixed on described connector or conducts on part.
Preferably, described radome is an insulating shroud.
Preferably, described radome is the radome made using the cable pyrocondensation cover material of insulation.
Preferably, described radome is cylinder integrated formed structure.
Preferably, described radome is split-type structural, including direct tube section and conical section.
Wherein, described direct tube section and conical section are passed through circular connector and are connected.
Preferably, the outside on described radome is provided with hook or link.
Preferably, described radome is metallic shield.
Preferably, described radome is provided with an opening.
Understand via above-mentioned technical scheme, compared with prior art, the utility model discloses the letting out of a kind of spark gap Dew current shielding device, comprising: radome, radome is installed and is wrapped in outside the high-pressure side of spark gap, and radome is designed to Parcel spark gap high-pressure side moulding, when carrying out spark gap DC high potential test, can by spark gap DC high potential test when Stray electrical current due to the less generation of space length masks, and when being tested, directly can complete in switch cubicle, Save remove and zinc oxide surge arresters afterwards operation, improve work efficiency and the safety of test.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also Other accompanying drawings can be obtained according to the accompanying drawing providing.
The equivalent circuit diagram that Fig. 1 tests in switch cubicle for Zinc-Oxide Arrester;
Fig. 2 is a kind of Leakage Current screening arrangement structural representation of spark gap disclosed in this utility model embodiment;
Fig. 3 is the Leakage Current screening arrangement structural representation of another kind of spark gap disclosed in this utility model embodiment;
Fig. 4 is the Leakage Current screening arrangement structural representation of another kind of spark gap disclosed in this utility model embodiment;
Fig. 5 is the inner structure schematic diagram of radome disclosed in this utility model embodiment;
Fig. 6 is that the radome tip exterior of Leakage Current screening arrangement disclosed in this utility model embodiment is provided with hook Structural representation;
Fig. 7 is Leakage Current screening arrangement schematic diagram disclosed in the present embodiment.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely description is it is clear that described embodiment is only a part of embodiment of this utility model rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of making creative work The every other embodiment being obtained, broadly falls into the scope of this utility model protection.
This utility model designs and produces a kind of high screening arrangement of dielectric strength, for strengthen spark gap and nearby device it Between dielectric strength so that stray electrical current during spark gap DC high potential test is greatly lowered so that do not affect to measure is accurate Property so that we can in the case of not removing spark gap directly complete in switch cubicle test.
Refer to accompanying drawing 2, Fig. 2 is a kind of Leakage Current screening arrangement knot of spark gap disclosed in this utility model embodiment Structure schematic diagram.Specifically, present embodiment discloses a kind of Leakage Current screening arrangement of spark gap, as shown in Fig. 2 this leakage electricity Stream screening arrangement specifically includes that radome 1, and radome 1 is installed and is wrapped in outside the high-pressure side 2 of spark gap, and radome designs Become the high-pressure side moulding of parcel spark gap.
The present embodiment is installed by the high-pressure side in spark gap and is wrapped up a radome, and radome is designed to parcel and keeps away The high-pressure side moulding of thunder device, when carrying out spark gap DC high potential test, can by during spark gap DC high potential test due to sky Between the stray electrical current of the less generation of distance mask, and when being tested, directly can complete in switch cubicle, save dismounting And the operation of zinc oxide surge arresters afterwards, improve work efficiency and the safety of test.
Refer to accompanying drawing 3, Fig. 3 is the Leakage Current screening arrangement of another kind of spark gap disclosed in this utility model embodiment Structural representation.As shown in figure 3, this Leakage Current screening arrangement specifically includes that radome 1, radome 1 is installed and is wrapped in and keeps away Outside the high-pressure side of thunder device 2, radome 1 is designed to wrap up the high-pressure side moulding of spark gap 2, on this basis, this Leakage Current Screening arrangement also includes: high-voltage connection 4 and connector or conduct part 3, wherein, connector or conduct one end of part 3 and fix In the inside of radome 1, the other end carries out joint with the high-pressure side of spark gap 2 and is connected, and high-voltage connection 4 be fixed on connector or Conduct on part 3.
Preferably, the above-mentioned connector referring to or to conduct part 3 be spring, high-voltage connection is fixed on spring, in shielding The inner structure of cover increases spring, and high-voltage connection is fixed on spring, ensures that Leakage Current screening arrangement covers on lightning-arrest During device high-pressure side, high-voltage connection and spark gap high-pressure side carry out reliable contacts.Part as connector or is conducted using spring, can To realize the flexible connection of spark gap and screening arrangement, the damage of screening arrangement exempted from by protection spark gap.Specifically, above-mentioned Fig. 2, Fig. 3 and Fig. 4 is Leakage Current screening arrangement structural representation disclosed in this utility model embodiment, and Fig. 5 is this utility model The inner structure schematic diagram of radome disclosed in embodiment.
Preferably, the above-mentioned radome 1 referring to is an insulating shroud, and is made using the cable thermoplastic cover material of insulation.
Preferably, the above-mentioned radome 1 referring to is cylinder integrated formed structure.Specifically, may be referred to accompanying drawing 3 and accompanying drawing Shown in 4, Fig. 4 is the Leakage Current screening arrangement structural representation of another kind of spark gap disclosed in this utility model embodiment, tool Body, as shown in figure 4, structure is consistent with accompanying drawing 3, be insulation weak spot mainly due to radome top, accordingly, it is preferred that Its tip designs is become round and smooth moulding, in addition, it can also be designed to other shapes.
Preferably, above-mentioned radome 1 split-type structural referring to, including direct tube section 5 and conical section 6, and direct tube section and circle Cone section is passed through circular connector and is connected 7, as shown in Figure 7.
Preferably, the tip exterior of the above-mentioned radome 1 referring to is provided with hook, directly can will reveal electricity using peg Stream screening arrangement covers in spark gap high-pressure side.Refer to accompanying drawing 6, Fig. 6 is Leakage Current screen disclosed in this utility model embodiment The radome tip exterior covering device is provided with the structural representation of hook;Fig. 7 is Leakage Current shielding disclosed in the present embodiment Schematic device.
Preferably, the above-mentioned radome 1 referring to is provided with an opening 8, for the extraction of high-voltage connection, realizes test dress Put and be connected with the high-pressure side of spark gap.
In order to verify the effectiveness of the Leakage Current screening arrangement of the spark gap of this utility model offer, using to same Spark gap have selected shield test reactor method and standard removes test method(s) to be contrasted, and test data is analyzed, test Result and analysis contrast are as follows:
The used time of two ways compares (unit: minute)
The test data of two ways compares
Sequence number u1ma(kv) imoa(μa)
Screening arrangement method 78.8 8
Ortho-test 78.2 7
According to above result of the test and analysis contrast, the Leakage Current screening arrangement of the spark gap that this utility model provides Spark gap is removed, with standard, the result tested substantially to be consistent, and the used time than ortho-test few very Many, therefore, spark gap can be removed with alternate standard and be tried by the Leakage Current screening arrangement that this utility model provides The method tested.
The Leakage Current screening arrangement of the spark gap that this utility model provides is high by high-strength insulating material, parcel spark gap The moulding of pressure side and the outside stray electrical of spark gap DC high potential test with the contained spring composition of high-voltage connection good contact The structure of stream screening arrangement.
In sum, the utility model discloses a kind of Leakage Current screening arrangement of spark gap, this utility model utilizes High-strength insulating material, the moulding of parcel spark gap high-pressure side and the contained spring with high-voltage connection good contact make lightning-arrest The outside stray electrical current screening arrangement of device DC high potential test, strengthens the dielectric strength between spark gap and nearby device, can be by Because the stray electrical current of the less generation of space length masks so that we can not remove during spark gap DC high potential test In switch cubicle, test is directly completed so that the DC high potential test of spark gap just can be in switch cubicle in the case of spark gap Complete, save remove and zinc oxide surge arresters afterwards operation, improve work efficiency and the safety of test.
It should be noted that each embodiment in this specification is all described by the way of going forward one by one, each embodiment weight Point explanation is all difference with other embodiment, between each embodiment identical similar partly mutually referring to.
Also, it should be noted herein, such as first and second or the like relational terms are used merely to one Entity or operation are made a distinction with another entity or operation, and not necessarily require or imply between these entities or operation There is any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant are intended to contain The comprising of lid nonexcludability, so that including a series of article of key elements or equipment not only includes those key elements, but also Including other key elements being not expressly set out, or also include for this article or the intrinsic key element of equipment.Do not having More limit in the case of, the key element that limited by sentence "including a ..." is it is not excluded that in the article including above-mentioned key element Or also there is other identical element in equipment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or new using this practicality Type.Multiple modifications to these embodiments will be apparent from for those skilled in the art, is determined herein The General Principle of justice can be realized in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The wide scope consistent with features of novelty.

Claims (9)

1. a kind of Leakage Current screening arrangement of spark gap is it is characterised in that include: radome, high-voltage connection and connector Or conduct part, wherein,
Described radome is installed and is wrapped in outside the high-pressure side of described spark gap;
The inside of described radome, the high pressure of the other end and described spark gap are fixed in described connector or the one end conducting part End carries out joint connection, and described high-voltage connection is fixed on described connector or conducts on part.
2. Leakage Current screening arrangement according to claim 1 is it is characterised in that described radome is an insulating shroud.
3. Leakage Current screening arrangement according to claim 1 is it is characterised in that described radome is the electricity using insulation The radome that cable pyrocondensation cover material is made.
4. Leakage Current screening arrangement according to claim 1 is it is characterised in that described radome is integrally formed for cylinder Structure.
5. Leakage Current screening arrangement according to claim 1 it is characterised in that described radome be split-type structural, Including direct tube section and conical section.
6. Leakage Current screening arrangement according to claim 5 is it is characterised in that described direct tube section and conical section pass through circle Shape connector connects.
7. Leakage Current screening arrangement according to claim 1 is it is characterised in that the outside on described radome is provided with Hook or link.
8. Leakage Current screening arrangement according to claim 1 is it is characterised in that described radome is metallic shield.
9. Leakage Current screening arrangement according to claim 1 is opened it is characterised in that being provided with one on described radome Mouthful.
CN201620382093.3U 2016-04-28 2016-04-28 Arrester reveal current shield device Expired - Fee Related CN205910292U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107329032A (en) * 2017-07-20 2017-11-07 北京送变电公司 Arrester direct current leakage test device
CN108627733A (en) * 2018-06-13 2018-10-09 中国南方电网有限责任公司超高压输电公司柳州局 A kind of intensity leakage current of an arrester experiment shielding auxiliary tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107329032A (en) * 2017-07-20 2017-11-07 北京送变电公司 Arrester direct current leakage test device
CN107329032B (en) * 2017-07-20 2019-09-17 北京送变电公司 Arrester direct current leakage test device
CN108627733A (en) * 2018-06-13 2018-10-09 中国南方电网有限责任公司超高压输电公司柳州局 A kind of intensity leakage current of an arrester experiment shielding auxiliary tool

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170125

Termination date: 20170428