CN203673900U - 10 kV distribution circuit lightning protection apparatus - Google Patents

10 kV distribution circuit lightning protection apparatus Download PDF

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Publication number
CN203673900U
CN203673900U CN201420027963.6U CN201420027963U CN203673900U CN 203673900 U CN203673900 U CN 203673900U CN 201420027963 U CN201420027963 U CN 201420027963U CN 203673900 U CN203673900 U CN 203673900U
Authority
CN
China
Prior art keywords
protection device
lightning protection
cylinder
insulator
gap
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
CN201420027963.6U
Other languages
Chinese (zh)
Inventor
吴仁光
吕达
孙圳
史斌
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
Ningbo Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Xiangshan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Ningbo Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Xiangshan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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, Ningbo Power Supply Co of State Grid Zhejiang Electric Power Co Ltd, Xiangshan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201420027963.6U priority Critical patent/CN203673900U/en
Application granted granted Critical
Publication of CN203673900U publication Critical patent/CN203673900U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a 10 kV distribution circuit lightning protection apparatus. The apparatus comprises an insulator, a metal fitting top cap which is arranged at the top end of the insulator and is provided with an electrode, a metal fitting chassis which is arranged at the bottom end of the insulator and is provided with a metal electrode, and an epoxy cylinder which is arranged inside the insulator and comprises a gap cylinder, a first taper copper sheet arranged at the top end of the gap cylinder, a second taper copper sheet arranged at the bottom end of the gap cylinder, and a zinc oxide resistor sheet arranged below the second taper copper sheet. According to the utility model, since the epoxy cylinder is arranged inside the insulator, the gap of the gap cylinder in the epoxy cylinder is not changed due to external factors after on-wire operation.

Description

A kind of 10kV wiring circuit lightning protection device
Technical field
The utility model relates to database field, in particular, relates to a kind of 10kV wiring circuit lightning protection device.
Background technology
In total tripping operation number of times of 10kV distribution line, what caused by thunderbolt accounts for 40%~70%, and with a varied topography, electric resistance of soil is high, the area that thunder and lightning takes place frequently, and the failure rate that thunder and lightning causes is higher.And along with the promoting the use of of insulated conductor, the fault of lightning-caused breaking is also increasing, this just makes shocking preventing technology become to have in distribution line the research direction of paying attention to.
Lightning protection device of the prior art comprises overvoltage protection device; overvoltage protection device is made up of becket, zinc oxide arrester and ground plate; in the time of lightning overvoltage, first puncture the air gap of overvoltage protection device, then through zinc oxide arrester, lightning current is imported to the earth.In prior art, utilize air gap to puncture and dredge lightning current, if spatial joint clearance is enough large, be enough to the starting the arc of power frequency continued flow to be eliminated, and the size of air gap is changed by external cause easily after on-line running.
Utility model content
In view of this, the utility model provides a kind of 10kV wiring circuit lightning protection device, the problem that changed by external cause to overcome the size of air gap in prior art.
For achieving the above object, the utility model provides following technical scheme:
A kind of 10kV wiring circuit lightning protection device, comprising:
Insulator;
Be arranged on the gold utensil top cap on described insulator top, described gold utensil top cap is provided with electrode;
Be arranged on the gold utensil chassis of described insulator bottom, described gold utensil chassis is provided with metal electrode;
Be arranged on the epoxy cylinder of described insulator inside, described epoxy cylinder comprises gap cylinder, be arranged at the first taper copper sheet on cylinder top, described gap, be arranged at the second taper copper sheet of cylinder bottom, described gap, be arranged on the zinc oxide resistance sheet of described the second taper copper sheet below.
Wherein, described lightning protection device is to be highly the lightning protection device of 280mm.
Wherein, described insulator is that insulation distance is the insulator of 190mm.
Wherein, described gap cylinder is to be highly the gap cylinder of 80mm.
Wherein, the epoxy cylinder that described epoxy cylinder is glass fibre.
Wherein, described gap cylinder is ceramic gap cylinder.
Wherein, described zinc oxide resistance sheet comprises three ZnO resistors.
Wherein, also comprise:
Be arranged on the screw on described gold utensil chassis.
Wherein, also comprise:
Be arranged on the load insulating coating of described outer surface of insulator.
Known via above-mentioned technical scheme, compared with prior art, the utility model embodiment provides a kind of 10kV wiring circuit lightning protection device, owing to epoxy cylinder being arranged on to insulator inside, so the gap of the gap cylinder in epoxy cylinder can not be subject to changed by external cause after on-line running.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
The structural representation of a kind of 10kV wiring circuit lightning protection device that Fig. 1 provides for the utility model embodiment;
In a kind of 10kV wiring circuit lightning protection device that Fig. 2 provides for the utility model embodiment, be arranged at the structural representation of the epoxy cylinder of insulator inside.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to accompanying drawing 1, the structural representation of a kind of 10kV wiring circuit lightning protection device providing for the utility model embodiment, this device comprises: insulator 101, gold utensil top cap 102, gold utensil chassis 103 and epoxy cylinder, wherein:
Gold utensil top cap 102 is arranged on the top of insulator 101, and gold utensil chassis 103 is arranged on the bottom of insulator 101, and epoxy cylinder is arranged on the inside of insulator 101.
Gold utensil top cap is provided with electrode.This electrode does not need puncture or wire stripping, does not destroy wire insulation.
The height of the lightning protection device that the utility model embodiment provides can be 280mm, and the insulation distance of insulator 101 can be 190mm.
The external structure of insulator 101 can present umbrella, and this umbrella-shaped structure can be called cluster parachute.
Because epoxy cylinder is arranged on the inside of insulator 101, so not shown in Fig. 1.
Refer to Fig. 2, the structural representation of the epoxy cylinder of insulator inside is provided in a kind of 10kV wiring circuit lightning protection device providing for the utility model embodiment, epoxy cylinder comprises: gap cylinder 201, the first taper copper sheet 202, the second taper copper sheet 203 and zinc oxide resistance sheet 204, wherein:
The first taper copper sheet 202 is arranged at the top of gap cylinder 201, and the second taper copper sheet 203 is arranged at the bottom of gap cylinder 201, and zinc oxide resistance sheet 204 is arranged on the below of the second taper copper sheet 203.
Zinc oxide resistance sheet can comprise three ZnO resistors.
The height of gap cylinder 201 can be 80mm.
The height of gap cylinder 201 should meet power-frequency sparkover voltage >=26kV, impulse sparkover voltage < 80kV.Realizing this function is mainly to regulate the height of gap cylinder 201 and the material of ceramic cylinder to realize.
The material of epoxy cylinder can be glass fibre, to increase the increase bending resistance load property of lightning protection device, the material of gap cylinder can be pottery, gap cylinder is internal clearance, for lightning current provides passage, and extinguishes in time the electric arc of power current, this zinc oxide resistance sheet is mainly responsible for lightning current to import the earth, and due to the nonlinear interaction of zinc oxide resistance sheet, even if can make power frequency continued flow pass through, even if also can cut off power frequency continued flow.
The Main Function of zinc oxide resistance sheet is to discharge lightning current, suppresses power frequency continued flow.The amplitude of lightning current is between 4kA-20kA, and power frequency continued flow maximum amplitude is at 15kA.These several factors of quantity that realize diameter, thickness and use that this function is mainly zinc oxide resistance sheet determine.It is to guarantee that lightning protection device prevents the key of lightning stroke trip that the development of zinc oxide resistance sheet is used.
The epoxy cylinder of lightning protection device adopts glass fibre to make, this be difference its with the key of general insulator, adopt glass fibre to improve the lightning protection bending resistance load performance of device absolutely, can meet the bending resistance burden requirement of 10kV insulator.
The material of the first taper copper sheet and the second taper copper sheet is fine copper, plays electric action.
The course of work of the lightning protection device that the utility model embodiment provides is: in the time that 10kV circuit is subject to Lightning Over-voltage and does not reach the flashover voltage of the insulator, internal clearance starts electric discharge, open when overcurrent reaches certain numerical value zinc oxide resistance sheet passage, overcurrent is discharged into the earth.And while being erected on insulated conductor, power frequency continued flow does not enter insulator inside, even the power frequency continued flow starting the arc, the enough arc extinguishings in air gap of 80mm, can cut off power frequency continued flow to prevent line tripping in time.
The non-linear of zinc oxide resistance sheet refers to that zinc oxide resistance sheet shows as Low ESR under lightning current, and under power current, zinc oxide resistance sheet shows as high impedance.
Power frequency continued flow: when electric equipment, under superpotential effect, electric discharge phenomena occurs, served as after loss of voltage, had with that power current and then to flow through, this electric current is exactly so-called power frequency continued flow.(power frequency is referring to the nominal frequency value of AC electric power systems.The power frequency of China's electric power system is 50Hz).
According to the effect of lightning protection device, and the performance index of pillar insulator for the technical conditions of the compound pillar insulator of reference and 10kV aerial condutor, main electric property, mechanical performance and the test requirements document of the lightning protection device that the utility model embodiment provides are as table 1, and the internal clearance of lightning protection device distance should enough be extinguished power frequency arc, lightning protection device should pass through heavy current impact resistance test, for example, can bear 4/10 μ s, 65kA heavy current impact twice.Lightning protection device should pass through composite sheath Insulation Test, lightning impulse tolerance 125kV, each 15 times of positive-negative polarity, the dry tolerance of power frequency 45kV, the each 1min of wet tolerance 45kV.The lightning protection device that the utility model embodiment provides all can be realized These parameters.
Table 1
System voltage (kV) 10 Rated voltage (kV) 12
Impulse electricity is pressed (kV) <80 Impact tolerance (kV) 125
(kV) pressed in work electric discharge ≥26 Power frequency withstand (kV/1min) 45
2mS square wave (A) 200 Structure height (mm) 280
U5kA residual voltage (kV) <40 Insulation distance (mm) 190
Bending resistance compound (kN) 6 Creepage distance (mm) 420
The 10kV wiring circuit lightning protection device that the utility model embodiment provides can also comprise the screw that is arranged on described gold utensil chassis.
The 10kV wiring circuit lightning protection device that the utility model embodiment provides can also comprise the load insulating coating that is arranged on described outer surface of insulator.
In sum; compared with overvoltage protection device of the prior art; the advantage of lightning protection device maximum is exactly that the external series gap of overvoltage protection device is fused to insulator inside by lightning protection device, thereby changes external series gap electric discharge into internal clearance electric discharge, to guarantee the stability of discharge voltage.
Overvoltage protection device of the prior art requires becket and insulator for concentrically ringed position when mounted; and after long-time running; there is partially to encircle phenomenon in the overwhelming majority; make becket and insulator not in concentrically ringed position; the even direct connect insulator of becket, causes its discharge voltage unstable, after all; its operation problem is because its structural factor causes, external series gap electric discharge be its easily go wrong basic.And its discharging gap is transferred to insulator inside by the advantage of the comprehensive overvoltage protection device of lightning protection device that the utility model embodiment provides, avoid the appearance of this problem.
In addition; installing; it is 80 ± 10mm to vertical range between wire that overvoltage protection device of the prior art requires becket; insulator and becket are in concentrically ringed position; these have all increased the installation difficulty of overvoltage protection device; and the mounting means of the lightning protection device that the utility model embodiment provides is identical with common insulator, do not need to adjust distance, it is simple, convenient to install.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (9)

1. a 10kV wiring circuit lightning protection device, is characterized in that, comprising:
Insulator;
Be arranged on the gold utensil top cap on described insulator top, described gold utensil top cap is provided with electrode;
Be arranged on the gold utensil chassis of described insulator bottom, described gold utensil chassis is provided with metal electrode;
Be arranged on the epoxy cylinder of described insulator inside, described epoxy cylinder comprises gap cylinder, be arranged at the first taper copper sheet on cylinder top, described gap, be arranged at the second taper copper sheet of cylinder bottom, described gap, be arranged on the zinc oxide resistance sheet of described the second taper copper sheet below.
2. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, described lightning protection device is the lightning protection device for 280mm highly.
3. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, described insulator is that insulation distance is the insulator of 190mm.
4. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, described gap cylinder is the gap cylinder for 80mm highly.
5. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that the epoxy cylinder that described epoxy cylinder is glass fibre.
6. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, described gap cylinder is ceramic gap cylinder.
7. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, described zinc oxide resistance sheet comprises three ZnO resistors.
8. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, also comprises:
Be arranged on the screw on described gold utensil chassis.
9. 10kV wiring circuit lightning protection device according to claim 1, is characterized in that, also comprises:
Be arranged on the load insulating coating of described outer surface of insulator.
CN201420027963.6U 2014-01-16 2014-01-16 10 kV distribution circuit lightning protection apparatus Expired - Fee Related CN203673900U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420027963.6U CN203673900U (en) 2014-01-16 2014-01-16 10 kV distribution circuit lightning protection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420027963.6U CN203673900U (en) 2014-01-16 2014-01-16 10 kV distribution circuit lightning protection apparatus

Publications (1)

Publication Number Publication Date
CN203673900U true CN203673900U (en) 2014-06-25

Family

ID=50970167

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420027963.6U Expired - Fee Related CN203673900U (en) 2014-01-16 2014-01-16 10 kV distribution circuit lightning protection apparatus

Country Status (1)

Country Link
CN (1) CN203673900U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103730216A (en) * 2014-01-16 2014-04-16 国家电网公司 10KV wiring circuit lightning protection device
CN106205899A (en) * 2016-07-15 2016-12-07 江苏远航电缆附件有限公司 A kind of band gap compound needle type insulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103730216A (en) * 2014-01-16 2014-04-16 国家电网公司 10KV wiring circuit lightning protection device
CN106205899A (en) * 2016-07-15 2016-12-07 江苏远航电缆附件有限公司 A kind of band gap compound needle type insulator
CN106205899B (en) * 2016-07-15 2017-07-28 江苏远航电缆附件有限公司 A kind of band gap compound needle type insulator

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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

Granted publication date: 20140625

Termination date: 20160116

EXPY Termination of patent right or utility model