CN201307473Y - Lightning protector for 10 kV line - Google Patents
Lightning protector for 10 kV line Download PDFInfo
- Publication number
- CN201307473Y CN201307473Y CNU2008201926731U CN200820192673U CN201307473Y CN 201307473 Y CN201307473 Y CN 201307473Y CN U2008201926731 U CNU2008201926731 U CN U2008201926731U CN 200820192673 U CN200820192673 U CN 200820192673U CN 201307473 Y CN201307473 Y CN 201307473Y
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- zinc oxide
- lightning
- oxide arrester
- arrester
- arm
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Abstract
The utility model discloses a lightning protector for a 10 kV line, relating to a lightning protection device. The lightning protector comprises an insulator 4 and a lead 5 which are connected with each other, an arc ignition electrode (1), a zinc oxide lightning protector (2) and a support cross arm (3). The arc ignition electrode (1) is fixed at the high voltage terminal of the zinc oxide lightning protector (2), and a discharge gap is formed between the lead (5) and the zinc oxide lightning protector to serve as a passage for lightning flashover. The low voltage terminal of the zinc oxide lightning protector (2) is fixed at the right end of the support cross arm (3) to prevent lightning surge and to cut off power frequency afterflow. The left end of the support cross arm (3) is fixed on a steel leg at the lower end of the insulator (4). The lightning protector is applicable for preventing lightning-caused breakage and tripping on a 10kV overhead power distribution line. Therefore, the lightning protector is practicable and economic.
Description
Technical field
The utility model relates to a kind of lightning protection equipment; Relate in particular to a kind of 10kV circuit lightning Protection device, specifically, relate to the lightning arrester that a kind of 10kV overhead distribution prevents lightning-caused breaking.
Background technology
The insulation level ratio of 10kV distribution line is easier to take place lightning stroke flashover, and then the formation power frequency arc blows lead.Overhead distribution adopts insulated conductor, has solved corridor and safety problem that plain conductor cann't be solved.Compare with cable, the insulated conductor reduced investment, build soon, advantage is fairly obvious; But the lightning-caused breaking problem is more outstanding, and repeatedly insulated conductor lightning-caused breaking accident has appearred in the whole nation.According to on-the-spot ruuning situation, the 10kV plain conductor lightning-caused breaking accident or tripping rate with lightning strike have also occurred easily than higher, 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, is difficult to form effective measures.
Summary of the invention
The purpose of this utility model just is to overcome the shortcoming and defect that existing lightning protection measures exists, a kind of relatively more suitable lightning protection measures is provided, a kind of 10kV circuit lightning 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.
Order of the present utility model is achieved in that
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.
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 also can make the gap between lead and the arc electrode too big variation can not take place under the situation of lead swing, guarantees the stability of discharge; The air gap of series connection makes lightning arrester can 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.
As shown from the above technical solution, 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 conductor cord disconnection accident that causes by lightning stroke flashover.
The utlity model has following advantage and 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 insulated conductor lightning-caused breaking accident.
Because the utility model is applicable to anti-lightning strike broken string of 10kV overhead distribution and tripping operation, has practicality and economy.
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 .1 is the structural front view that supports cross-arm,
Fig. 4 .2 is the structure vertical view that supports cross-arm.
Wherein:
1-arc electrode;
1.1-arc ignition face;
1.2-fixing threaded hole;
1.3-nut bore.
2-zinc oxide arrester;
2.1-high-pressure side screw rod;
2.2-hold-down nut;
2.3-clamp nut;
2.4-composite sheath;
2.5-zinc oxide valve plate;
2.6-low-pressure end screw rod.
3-support cross-arm;
3.1-steel pin screw;
3.2-lightning arrester low-pressure end screw.
4-insulator.
5-lead.
Embodiment:
Describe in detail below in conjunction with drawings and Examples:
One, general structure
As Fig. 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.
Two, each functional block structure
1, arc electrode 1
As Fig. 2, arc electrode 1 is a kind of T shape metal structure that comprises arc ignition face 1.1, fixing threaded hole 1.2 and nut bore 1.3 from top to bottom.
Screw 1.2 can make arc electrode 1 be fixed on the high-pressure side screw rod 2.1 of zinc oxide arrester 2, and tightening back nut hole 1.3 can cover hold-down nut 2.2, simultaneously arc electrode 1 is installed firmly; When installing on the line, lead 5 is placed on 1 the arc ignition face 1.1 of arc electrode, form the discharging gap between lead 5 and the zinc oxide arrester 2.
2, zinc oxide arrester 2
As Fig. 3, zinc oxide arrester 2 comprises from top to bottom zinc oxide valve plate 2.5, composite sheath 2.4, clamp nut 2.3, hold-down nut 2.2 and the low-pressure end screw rod 2.6 of the high-pressure side screw rod 2.1 of connection, hold-down nut 2.2, clamp nut 2.3, composite sheath 2.4, a plurality of series connection successively.
Composite sheath 2.4 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.
3, support cross-arm 3
As Fig. 4 .1,4.2, supporting cross-arm 3 is metallic support sheets of a kind of bending, and the left side is provided with steel pin screw 3.1 jaggy, and the right is provided with lightning arrester low-pressure end screw 3.2.
Steel pin 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 lightning arrester low-pressure end screw 3.2 that supports cross-arm 3, tightens clamp nut 2.3.
So zinc oxide arrester 2 is connected in parallel on the side of insulator 4, plays the effect that prevents lightning-caused breaking.
Three, 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 circuit lightning 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, by the described a kind of 10kV circuit lightning Protection device of claim 1, it is characterized in that:
Arc electrode (1) is a kind of T shape metal structure that comprises arc ignition face (1.1), fixing threaded hole (1.2) and nut bore (1.3) from top to bottom.
3, by the described a kind of 10kV circuit lightning Protection device of claim 1, it is characterized in that:
Zinc oxide arrester (2) comprises from top to bottom zinc oxide valve plate (2.5), composite sheath (2.4), clamp nut (2.3), hold-down nut (2.2) and the low-pressure end screw rod (2.6) of the high-pressure side screw rod (2.1) of connection, hold-down nut (2.2), clamp nut (2.3), composite sheath (2.4), a plurality of series connection successively.
4, by the described a kind of 10kV circuit lightning Protection device of claim 1, it is characterized in that:
Supporting cross-arm (3) is a kind of metallic support sheet of bending, and the left side is provided with steel pin screw jaggy (3.1), and the right is provided with lightning arrester low-pressure end screw (3.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201926731U CN201307473Y (en) | 2008-11-20 | 2008-11-20 | Lightning protector for 10 kV line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201926731U CN201307473Y (en) | 2008-11-20 | 2008-11-20 | Lightning protector for 10 kV line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201307473Y true CN201307473Y (en) | 2009-09-09 |
Family
ID=41099940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201926731U Expired - Lifetime CN201307473Y (en) | 2008-11-20 | 2008-11-20 | Lightning protector for 10 kV line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201307473Y (en) |
Cited By (6)
| 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 |
| CN102403686A (en) * | 2011-11-02 | 2012-04-04 | 河南省电力公司漯河供电公司 | Lightning protection device for contactless power transmission and distribution line |
| CN102723707A (en) * | 2012-05-23 | 2012-10-10 | 河南省电力公司信阳供电公司 | Lightning protection device with overhead insulated line |
| CN104009440A (en) * | 2014-04-22 | 2014-08-27 | 国网上海市电力公司 | Installation method of line arresters for lighting protection of 10 kV common-tower double-circuit line |
| WO2014169509A1 (en) * | 2013-04-18 | 2014-10-23 | 国家电网公司 | New power distribution network overvoltage protector equipped with ring-shaped electrode and distanced grades |
| CN105514802A (en) * | 2016-01-27 | 2016-04-20 | 武汉水院电气有限责任公司 | Two-stage series gap lightning flashover protector capable of being replaced in electrified mode |
-
2008
- 2008-11-20 CN CNU2008201926731U patent/CN201307473Y/en not_active Expired - Lifetime
Cited By (7)
| 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 |
| CN102403686A (en) * | 2011-11-02 | 2012-04-04 | 河南省电力公司漯河供电公司 | Lightning protection device for contactless power transmission and distribution line |
| CN102723707A (en) * | 2012-05-23 | 2012-10-10 | 河南省电力公司信阳供电公司 | Lightning protection device with overhead insulated line |
| WO2014169509A1 (en) * | 2013-04-18 | 2014-10-23 | 国家电网公司 | New power distribution network overvoltage protector equipped with ring-shaped electrode and distanced grades |
| CN104009440A (en) * | 2014-04-22 | 2014-08-27 | 国网上海市电力公司 | Installation method of line arresters for lighting protection of 10 kV common-tower double-circuit line |
| CN105514802A (en) * | 2016-01-27 | 2016-04-20 | 武汉水院电气有限责任公司 | Two-stage series gap lightning flashover protector capable of being replaced in electrified mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090909 |