CN201348907Y - Lightning protector of 10kV line - Google Patents

Lightning protector of 10kV line Download PDF

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Publication number
CN201348907Y
CN201348907Y CNU2009201427742U CN200920142774U CN201348907Y CN 201348907 Y CN201348907 Y CN 201348907Y CN U2009201427742 U CNU2009201427742 U CN U2009201427742U CN 200920142774 U CN200920142774 U CN 200920142774U CN 201348907 Y CN201348907 Y CN 201348907Y
Authority
CN
China
Prior art keywords
zinc oxide
lightning
oxide arrester
arrester
pressure
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
CNU2009201427742U
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Chinese (zh)
Inventor
韩学民
周文俊
杨仕通
邱凌
李怀龙
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.)
WUHAN HENG'AN ELECTRIC CO Ltd
Chaou Power Supply Co of State Grid Anhui Electric Power Co Ltd
Original Assignee
WUHAN HENG'AN ELECTRIC CO Ltd
Chaou Power Supply Co of State Grid Anhui 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 WUHAN HENG'AN ELECTRIC CO Ltd, Chaou Power Supply Co of State Grid Anhui Electric Power Co Ltd filed Critical WUHAN HENG'AN ELECTRIC CO Ltd
Priority to CNU2009201427742U priority Critical patent/CN201348907Y/en
Application granted granted Critical
Publication of CN201348907Y publication Critical patent/CN201348907Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a lightning protector of a 10kV line and relates to a lightning protection device. The lightning protector comprises an insulator and a wire which are mutually connected and is provided with a striking arc electrode, a zinc oxide arrester and a supporting crosspiece, wherein, the striking arc electrode is fixed on the high-voltage side of the zinc oxide arrester, a discharging gap is formed between the wire and the zinc oxide arrester, a lightning flashover channel is provided, the lower-voltage side of the zinc oxide arrester is fixed at the right end of the supporting crosspiece to avoid the lightning overvoltage and prevent the power frequency current from being intercepted, and the left end of the supporting crosspiece is fixed on a steel pin at the lower end of the insulator. The utility model is suitable for preventing the lightning stroke breakage and tripping of the 10 kV overhead distribution line, and is practical and economical.

Description

10kV line thunder protection device
Technical field:
The utility model relates to a kind of lightning protection equipment, relates in particular to a kind of 10kV line thunder protection device, specifically, relates to the lightning arrester that a kind of 10kV overhead distribution prevents lightning-caused breaking and tripping operation.
Background technology:
The insulation level of 10kV distribution line is low, and lightning stroke flashover easily takes place, and then the formation power frequency arc blows lead.Overhead distribution adopts insulated conductor, compares with cable, the insulated conductor reduced investment, builds soon, and advantage is fairly obvious; But the lightning-caused breaking problem is outstanding, and repeatedly insulated conductor lightning-caused breaking accident has appearred in the whole nation.According to on-the-spot ruuning situation, the lightning-caused breaking accident or the lightning stroke trip accident of upper frequency also appearred in the 10kV plain conductor, even the lightning-caused breaking accident also took place the 35kV plain conductor.The main cause that causes broken string is to build arc to form power frequency continued flow on the lightning stroke flashover passage, and the temperature of arc root is very high, can at short notice lead be blown, even plain conductor if the electric current that passes through is very big, also can blow lead.
The lightning protection measures that adopts has the overhead ground wire of installation, puncture property arc-preventing metal utensil, lightning protection pillar insulator and zinc oxide arrester etc. at present, still according to the feedback of field practice, exists various problems, needs to improve.
The utility model content:
For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of relatively more suitable lightning protection measures, and a kind of 10kV line thunder protection device promptly is provided, can be when effectively preventing the lightning-caused breaking accident, reduce the tripping rate with lightning strike of circuit, improve the reliability of power supply.
The utility model technical solution problem adopts following technical scheme:
A kind of 10kV line thunder protection device comprises interconnective insulator and lead, is provided with arc electrode, zinc oxide arrester and support cross-arm; Arc electrode is fixed in the zinc oxide arrester high-pressure side, forms a discharging gap between lead and zinc oxide arrester; The zinc oxide arrester low-pressure end is fixed in the right-hand member that supports cross-arm; The left end that supports cross-arm is fixed on the steel pin of insulator lower end.
Described arc electrode is a kind of U-shaped metal structure that comprises arc ignition face and fixing threaded hole from top to bottom.
Zinc oxide arrester comprises high-pressure side screw rod, hold-down nut, clamp nut, composite sheath, the zinc oxide valve plate of a plurality of series connection, following composite sheath, lower compression nut, following hold-down nut and the low-pressure end screw rod that connects successively from top to bottom.
Supporting cross-arm is a kind of metallic support sheet of bending, and left end is provided with the open screw that is connected with insulator lower end steel pin, and right-hand member is provided with the closure screw that is connected with lightning arrester low-pressure end screw rod.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model comprises arc electrode, zinc oxide arrester and support cross-arm etc.Its special character is to form an air gap by arc electrode between lead and lightning arrester, and lightning arrester low-pressure end natural grounding does not need to increase extra earth resistance, reduces construction intensity and can solve lead lightning-caused breaking problem effectively simultaneously.
2, arc electrode is installed in the zinc oxide arrester high-pressure side, form an air gap at lead and zinc oxide arrester, electrode design is circular-arc, even under the situation of lead swing, also can make the gap between lead and the arc electrode too big variation can not take place, guarantee the stability of discharge; The air gap of series connection makes lightning arrester not be subjected to the effect of power-frequency voltage, switching overvoltage etc. at ordinary times, increases the useful life of lightning arrester; Under the lightning overvoltage effect, lightning arrester can effective action, and the amplitude of restriction lightning overvoltage is also blocked power frequency continued flow, prevents the insulator arc-over accident; By supporting cross-arm lightning arrester is installed in parallel in the insulator side, appropriate design supports cross-arm makes lightning arrester and lead form suitable series gap, can form effective discharge channel by series gap, the assurance zinc oxide arrester can escape switching overvoltage again can be at effective action under the lightning overvoltage.
According to the above, when the 10kV overhead distribution is subjected to being struck by lightning, can puncture the discharging gap that arc electrode provides, make the zinc oxide arrester action, lightning overvoltage is limited under the flashover voltage of insulator, by zinc oxide arrester power frequency continued flow is blocked then, can prevent the tripping operation and the conductor cord disconnection accident that cause by lightning stroke flashover.
The utility model also has following good effect:
1, satisfy the zinc oxide arrester of GB regulation and the performance requirement of gold utensil, the discharge residual voltage is much smaller than the flashover voltage of insulator.
2, the zinc oxide arrester overcoat is made by synthetic overcoat silicon rubber, has good insulation performance performance and antifouling property.
3, design is succinct, and construction install convenience adopts pure air gap, and system voltage does not bear in system, the zinc oxide arrester long service life.
4, have good operating characteristics, arc electrode can provide repeatedly the ablation of power frequency arc, dependable performance.
5, be applicable to the 10kV overhead distribution, comprise that insulated circuit and plain conductor circuit prevent lightning stroke trip and broken string accident.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of arc electrode.
Fig. 3 is the structural representation of zinc oxide arrester.
Fig. 4 is the structure vertical view that supports cross-arm.
Number in the figure: 1 arc electrode, 1.1 arc ignition face, 1.2 fixing threaded holes, 2 zinc oxide arresters, 2.1 high-pressure side screw rods, 2.2 hold-down nuts, 2.3 clamp nut, 2.4 composite sheaths, 2.5 zinc oxide valve plates, 2.6 the low-pressure end screw rod, 2.7 times composite sheaths, 2.8 lower compression nuts, 2.9 following hold-down nut, 3 support cross-arm, 3.1 open screws, 3.2 the closure screw, 4 insulators, 5 leads.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment, non-limiting examples is as described below:
Embodiment: shown in Figure 1, the utility model comprises interconnective insulator 4 and lead 5, is provided with arc electrode 1, zinc oxide arrester 2 and supports cross-arm 3;
Arc electrode 1 is fixed in zinc oxide arrester 2 high-pressure sides, forms a discharging gap between lead 5 and zinc oxide arrester 2, and the lightning stroke flashover passage is provided;
Zinc oxide arrester 2 low-pressure ends are fixed in the right-hand member that supports cross-arm 3, prevent lightning overvoltage and block power frequency continued flow;
The left end that supports cross-arm 3 is fixed on the steel pin of insulator 4 lower ends.
Shown in Figure 2, arc electrode 1 is a kind of U-shaped metal structure that comprises arc ignition face 1.1 and fixing threaded hole 1.2 from top to bottom.Fixing threaded hole 1.2 can make arc electrode 1 be fixed on the high-pressure side screw rod 2.1 of zinc oxide arrester 2, and install arc electrode 1 firmly in the fastening nut hole; When installing on the line, lead 5 is placed on the arc ignition face 1.1 of arc electrode 1, form the discharging gap between lead 5 and the zinc oxide arrester 2.
Shown in Figure 3, zinc oxide arrester 2 comprises high-pressure side screw rod 2.1, hold-down nut 2.2, clamp nut 2.3, composite sheath 2.4, the zinc oxide valve plate 2.5 of a plurality of series connection, following composite sheath 2.7, lower compression nut 2.8, following hold-down nut 2.9 and the low-pressure end screw rod 2.6 that connects successively from top to bottom.
Upper and lower composite sheath 2.4,2.7 provides the external insulation of zinc oxide arrester 2, guarantees enough dielectric strengths;
The zinc oxide valve plate 2.5 of a plurality of series connection places zinc oxide arrester 2 centers, can limit lightning overvoltage and block power frequency continued flow.
In addition, zinc oxide arrester 2 can be selected the finished product lightning arrester of the regulation that meets JB/T 8952-2005 " AC system polymeric metal oxide surge arrester " and two standards of GB11032-2000 " interchange gapless metal-oxide lighting arrester " for use.
Shown in Figure 4, supporting cross-arm 3 is metallic support sheets of a kind of bending, and left end is provided with the open screw 3.1 that is connected with insulator lower end steel pin, and right-hand member is provided with the closure screw 3.2 that is connected with lightning arrester low-pressure end screw rod.
Open screw 3.1 is installed on the steel pin of insulator 4, and the low-pressure end screw rod 2.6 of zinc oxide arrester 2 is installed in the closure screw 3.2 that supports cross-arm 3, tightens lower compression nut 2.8.
So zinc oxide arrester 2 is connected in parallel on the side of insulator 4, plays the effect that prevents lightning-caused breaking.
Operation principle of the present utility model:
The lightning overvoltage amplitude height of 10kV overhead distribution, discharge time is short, and the insulation level of 10kV distribution line is low, lightning overvoltage can make insulator 4 that flashover takes place, and forms power frequency continued flow and blow lead on the lightning stroke flashover passage.
When electrical network normally moves, because arc electrode 1 forms a discharging gap between lead and zinc oxide arrester 2, isolate power-frequency voltage, zinc oxide arrester 2 bears voltage hardly, gap simultaneously reasonable in design, zinc oxide arrester 2 is failure to actuate when surpassing overvoltage, has increased the useful life of zinc oxide arrester 2; Under the lightning overvoltage effect of direct lightning strike or the generation of induction thunder, the air gap is breakdown, and zinc oxide arrester 2 bodies present Low ESR, and lightning current is released into ground; After the lightning impulse, power-frequency voltage loads on zinc oxide arrester 2 bodies, the resistance moment change of zinc oxide arrester 2 bodies is big, the electric current that passes through is that arc current is suppressed in low numerical value, increase falls in the air gap arc voltage, the insulation of air gap recovers rapidly, and electric arc extinguishes in the short time naturally at the utmost point, and power frequency continued flow is interdicted fully.

Claims (4)

1, a kind of 10kV line thunder protection device comprises interconnective insulator (4) and lead (5), it is characterized in that,
Be provided with arc electrode (1), zinc oxide arrester (2) and support cross-arm (3);
Arc electrode (1) is fixed in zinc oxide arrester (2) high-pressure side, forms a discharging gap between lead (5) and zinc oxide arrester (2);
Zinc oxide arrester (2) low-pressure end is fixed in the right-hand member that supports cross-arm (3);
The left end that supports cross-arm (3) is fixed on the steel pin of insulator (4) lower end.
2, a kind of 10kV line thunder protection device according to claim 1 is characterized in that, arc electrode (1) is a kind of U-shaped metal structure that comprises arc ignition face (1.1) and fixing threaded hole (1.2) from top to bottom.
3, a kind of 10kV line thunder protection device according to claim 1, it is characterized in that zinc oxide arrester (2) comprises high-pressure side screw rod (2.1), hold-down nut (2.2), clamp nut (2.3), composite sheath (2.4), the zinc oxide valve plate (2.5) of a plurality of series connection, following composite sheath (2.7), lower compression nut (2.8), following hold-down nut (2.9) and the low-pressure end screw rod (2.6) that connects successively from top to bottom.
4, a kind of 10kV line thunder protection device according to claim 1, it is characterized in that, supporting cross-arm (3) is a kind of metallic support sheet of bending, left end is provided with the open screw (3.1) that is connected with insulator lower end steel pin, and right-hand member is provided with the closure screw (3.2) that is connected with lightning arrester low-pressure end screw rod.
CNU2009201427742U 2009-01-20 2009-01-20 Lightning protector of 10kV line Expired - Fee Related CN201348907Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2009201427742U CN201348907Y (en) 2009-01-20 2009-01-20 Lightning protector of 10kV line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2009201427742U CN201348907Y (en) 2009-01-20 2009-01-20 Lightning protector of 10kV line

Publications (1)

Publication Number Publication Date
CN201348907Y true CN201348907Y (en) 2009-11-18

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Country Status (1)

Country Link
CN (1) CN201348907Y (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290177A (en) * 2011-07-27 2011-12-21 武汉水院电气有限责任公司 10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode
CN105023668A (en) * 2015-06-29 2015-11-04 蔡桂钧 Zinc oxide arrester for power plant
CN105869802A (en) * 2016-05-31 2016-08-17 上海电瓷厂有限公司 Detachable rotary horizontal all-insulation arrester with disconnector
CN109767886A (en) * 2019-03-27 2019-05-17 长沙理工大学 The anti-lightning strike broken string of 10kV insulated conductor determines method with protective device and mounting distance
CN111739702A (en) * 2020-05-11 2020-10-02 国网浙江江山市供电有限公司 Lightning protection flashover protector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290177A (en) * 2011-07-27 2011-12-21 武汉水院电气有限责任公司 10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode
CN102290177B (en) * 2011-07-27 2012-12-19 武汉水院电气有限责任公司 10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode
CN105023668A (en) * 2015-06-29 2015-11-04 蔡桂钧 Zinc oxide arrester for power plant
CN105869802A (en) * 2016-05-31 2016-08-17 上海电瓷厂有限公司 Detachable rotary horizontal all-insulation arrester with disconnector
CN105869802B (en) * 2016-05-31 2018-07-06 上海电瓷厂有限公司 A kind of detachable rotary-type pressure-bearing type all insulation arrester of band disconnector
CN109767886A (en) * 2019-03-27 2019-05-17 长沙理工大学 The anti-lightning strike broken string of 10kV insulated conductor determines method with protective device and mounting distance
CN109767886B (en) * 2019-03-27 2021-01-12 长沙理工大学 10kV insulated conductor lightning protection device for preventing breakage and installation distance determining method
CN111739702A (en) * 2020-05-11 2020-10-02 国网浙江江山市供电有限公司 Lightning protection flashover protector

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091118

Termination date: 20110120