CN100550551C - Prevent the are-tight puncture gold utensil that the suspended insulated guide wire lightning-caused breaking is used - Google Patents
Prevent the are-tight puncture gold utensil that the suspended insulated guide wire lightning-caused breaking is used Download PDFInfo
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- CN100550551C CN100550551C CNB2006100696009A CN200610069600A CN100550551C CN 100550551 C CN100550551 C CN 100550551C CN B2006100696009 A CNB2006100696009 A CN B2006100696009A CN 200610069600 A CN200610069600 A CN 200610069600A CN 100550551 C CN100550551 C CN 100550551C
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Abstract
The present invention prevents the are-tight puncture gold utensil that the suspended insulated guide wire lightning-caused breaking is used, comprise: penetrate the insulating barrier of insulated conductor and the penetrating cable clamp that inner conductor closely electrically contacts, the ground connection arc electrode that is electrically connected with the line insulator earth terminal, the are-tight electrode that is electrically connected with penetrating cable clamp, insulating cover, along blow-by, it is characterized in that the are-tight electrode that is electrically connected with penetrating cable clamp adopts two-way are-tight electrode, is connected the both sides of penetrating cable clamp at the bottom of the insulating cover.The present invention is by being set to two-way are-tight electrode, must be installed in load side when having changed the unidirectional use of the are-tight puncture gold utensil of original technology, when two-way use, and the defective that need install in the insulator both sides.It is dove-tail form or vertical-type structure that the present invention has done optimal design simultaneously for the shape of two-way are-tight electrode, make are-tight puncture gold utensil under the bidirectional power supply mode, move safer, install more convenient, use more economical.Are-tight puncture gold utensil of the present invention is easy for installation, quick, satisfies the action need of job site.
Description
Technical field
The present invention relates to the electric power system overhead distribution, relate in particular to a kind of are-tight puncture gold utensil that is used to prevent the suspended insulated guide wire lightning-caused breaking, it is particularly suitable for using on the 10KV suspended insulated guide wire.
Background technology
In order to reduce the overhead distribution fault that external causes such as trees, birds, accumulated snow cause, improve power supply reliability, developed country gradually adopts suspended insulated guide wire since the later stage in the sixties in the world. and China implements insulating from the eighties to city overhead distribution net and transforms pilot.The nineties begins to apply.
Insulated conductor is compared with cable, reduced investment, builds soon, and advantage is fairly obvious.But the lightning-caused breaking problem is but very outstanding.The lightning-caused breaking principle of insulated conductor has been compared obviously different with plain conductor.When direct lightning strike or lightning induced voltage acted on plain conductor and cause insulator arc-over, the power frequency short circuit current electric arc that continues moved to deviating from the power supply direction along lead under electrodynamic effect, and lead is very little by the probability of serious burn.Insulated conductor is then different, lightning overvoltage at first punctures wire insulation and then causes insulator arc-over, breakdown insulating barrier is a pin hole shape, the power frequency short circuit current electric arc that continues is subjected to the anti-coagulating action that insulate on every side, the arc root can only will fitly be blown at extremely short time inside conductor in the burning of pin hole place.Therefore, the lightning-caused breaking problem must be properly settled, the safe operation of overhead insulating power distribution network could be guaranteed.
According to the mechanism of above-mentioned insulated conductor lightning-caused breaking, the corresponding precautionary measures have " dredge and stop up " dual mode." dredging " is exactly with near the local bare wireization of the insulated conductor the insulator, make power frequency arc arc root shift or be fixed on the special gold utensil and burn, thereby guardwire avoids burn.For example, peeling off insulating barrier at insulator and wire coupling place adopts arc protection molded lines folder or the insulated conductor of insulator both sides is peeled off one section insulating barrier and installed the preventing arc wire clamp additional." obstruction " is exactly to stop the power frequency continued flow starting the arc behind the lightning stroke flashover.For example, adopt the current-limiting arc-extinguishing angle, i.e. the ring-like external series gap metal oxide arrester of band series connection.
Widely used a kind of are-tight puncture gold utensil patent publication No. is at present: CN1481057A, name is called: the are-tight puncture gold utensil that is used to prevent the suspended insulated guide wire lightning-caused breaking, its primary structure mode is: by the penetrating cable clamp that upper holder block and lower lock block constitute, the insulating barrier and the conductor inside that penetrate insulated conductor closely electrically contact; The ground connection arc electrode that is electrically connected with the line insulator earth terminal; The are-tight electrode that electrically connects with penetrating cable clamp; Be fixed on the insulating cover that penetrating cable clamp outside is used to insulate and limits arc.The characteristics that this is are-tight, and the puncture gold utensil has anti-lightning strike broken string, do not peel off wire insulation, construction is simple, security reliability is high.But, only be applicable to the single line installation because the are-tight electrode employing of its setting is unidirectional are-tight electrode.In the face of double-circuit the time, must all same protection gold utensil to be installed simultaneously, not only cause the complexity of construction, also resource be caused too much waste in the insulator both sides.
Summary of the invention
Technical problem to be solved by this invention is on the basis of existing plain edition preventing arc puncture gold utensil, improves to new structure is particularly useful for preventing moving under the suspended insulated guide wire lightning-caused breaking bidirectional power supply mode, and gold utensil is installed simple, and is easy to maintenance.
The present invention prevents the are-tight puncture gold utensil that the suspended insulated guide wire lightning-caused breaking is used, comprise: penetrate the insulating barrier of insulated conductor and the penetrating cable clamp that inner conductor closely electrically contacts, the ground connection arc electrode that is electrically connected with the line insulator earth terminal, the are-tight electrode that is electrically connected with penetrating cable clamp, insulating cover, along blow-by, it is characterized in that the are-tight electrode that is electrically connected with penetrating cable clamp adopts two-way are-tight electrode, is connected the both sides of penetrating cable clamp at the bottom of the insulating cover.
The present invention is the improvement to existing are-tight puncture gold utensil, by being set to two-way are-tight electrode, must be installed in load side when having changed unidirectional uses of original technology, when two-way use, and need be in the defective of insulator both sides installation.The present invention both had been applicable to the suspended insulated guide wire of unidirectional power supply power supply, also was applicable to the suspended insulated guide wire of bi-directional power power supply.When the present invention was installed in mains side, are-tight electrode bore burning of short circuiting arc near the part of insulator side, thereby prevents the generation of lightning-caused breaking.When being installed in load side, are-tight electricity bears burning of short circuiting arc away from the part of insulator side, thereby prevents the generation of lightning-caused breaking.But preferably on the insulated conductor of unidirectional power supply power supply, are-tight puncture gold utensil is installed on the line insulator load side in the present invention; On the suspended insulated guide wire of bi-directional power power supply, are-tight puncture gold utensil be installed on the main supplier of electricity of line insulator to load side.
The present invention has done optimal design for the shape of two-way are-tight electrode, preferred dove-tail form or vertical-type structure.
Penetrating cable clamp is made of upper holder block, middle briquetting and lower lock block, adopt torsion nut or torque wrench to fix between them, on upper holder block and middle briquetting and the contacted surface of insulated conductor, be provided with groove, the end radius of circle of groove and the radius of insulated conductor are complementary, the groove middle part is a plurality of cutters tooth of thorn-like, and the point of a knife of all cutters tooth and insulated conductor conductor inside section radius are complementary.Middle briquetting and lower lock block can be made as integrative-structure, and are-tight electrode can be made as one with middle briquetting, the lower lock block of integrative-structure, and also split is electrically connected with it.Middle briquetting and lower lock block preferably adopt the branch body structure, and are-tight electrode is pressed between middle briquetting and the lower lock block.Can change are-tight electrode like this, thereby reduce use cost.
Preferably be added with disk spring between described torsion nut or torque wrench and the upper holder block, quantity is 1～6, best 2, and make the puncture structure under the power circuit service conditions of complexity, move more safe and reliable.
Insulating cover on the are-tight electrode and the insulating cover on the penetrating cable clamp can be the split structure, also can be structure as a whole.
Below be several groups of some preferred technical data about the technical program, particular content has description in embodiment.
The ground connection arc electrode is positioned at the below of penetrating cable clamp, with the spacing of penetrating cable clamp be 80～450mm.
Are-tight electrode away from the end of insulated conductor to the minimum perpendicular distance of wire insulation greater than 30 millimeters, the end of its close insulated conductor and the beeline of wire insulation are greater than 5 millimeters, be parallel on the direction of insulated conductor, the wide 0-350 millimeter of part difference that two ends of are-tight electrode are more exposed than the puncture gold utensil, the axis of lead is respectively between 5 °-90 ° at the formed angle of the projection on the horizontal plane in projection on the horizontal plane and two are-tight electrodes.
Are-tight puncture gold utensil of the present invention has anti-lightning strike broken string, does not peel off wire insulation, construction is simple, subsidiary insulating cover, security reliability height, fill up the characteristics of domestic technique blank.Particularly; it has the following advantages: (1) because are-tight puncture gold utensil penetrates the insulating barrier of insulated conductor, closely electrically connects with the plain conductor of inside, after the thunder discharge; the arc root of the power frequency short circuit current electric arc that continues is fixed on the are-tight electrode and burns, and guardwire avoids burn.(2) are-tight puncture gold utensil need not to peel off insulating barrier, can draw high-voltage.The puncture cutter tooth is clamp-oned insulating barrier in the mode of a pressure, and is very little to the wire insulation damage.Stab knife tooth surface coating electrically conductive silicone grease can prevent that moisture from entering lead inside.(3) the are-tight electrode of are-tight puncture gold utensil has enough thickness and volume, stands repeatedly burning of power frequency arc.(4) adopt torsion nut or torque wrench, make the degree of depth of puncture reasonable, can well contact, can not influence the intensity and the performance of insulated conductor again with insulated conductor.(5) adopt disk spring to make the puncture structure under the power circuit service conditions of complexity, move more safe and reliable.(6) ground connection arc electrode reliable ground.During installation, the ground connection arc electrode is positioned at the below of penetrating cable clamp, with penetrating cable clamp spacing 80-450 millimeter, can guarantee that lightning discharge occurs on the are-tight puncture gold utensil.(7) add insulating cover in are-tight puncture gold utensil outside, can reduce the accident that causes owing to reasons such as foreign matter collisions, simultaneously the structure of insulating cover is optimized, exist unimpeded electric arc to burn passage when guaranteeing to be struck by lightning.Processing, easy for installation.(8) are-tight electrode is optimized, adopts swallow-tail form or vertical-type structure, make are-tight puncture gold utensil under the bidirectional power supply mode, move safer, install more convenient, use is more economical.(9) are-tight puncture gold utensil is easy for installation, quick, satisfies the action need of job site.(10) good mechanical property of are-tight puncture gold utensil, the insulation property of insulating cover, antifouling property and weather protection ageing properties are good.
Description of drawings
Fig. 1 is the scheme of installation of the are-tight puncture gold utensil of the present invention;
Fig. 2 is are-tight electrode first embodiment of the are-tight puncture gold utensil of the present invention and the schematic diagram of feature;
Fig. 3 is the schematic diagram of are-tight electrode second embodiment of the are-tight puncture gold utensil of the present invention;
Fig. 4 is the schematic diagram of penetrating cable clamp first embodiment of the are-tight puncture gold utensil of the present invention;
Fig. 5 is the schematic diagram of penetrating cable clamp second embodiment of the are-tight puncture gold utensil of the present invention;
Fig. 6 is the part feature schematic diagram of the are-tight puncture gold utensil of the present invention penetrating cable clamp;
Fig. 7 is insulating cover first embodiment of the are-tight puncture gold utensil of the present invention and the schematic diagram of feature;
Fig. 8 is the schematic diagram of insulating cover second embodiment of the are-tight puncture gold utensil of the present invention;
Fig. 9 is that the are-tight puncture gold utensil of the present invention is used for lightning impulse discharge test wiring schematic diagram;
Figure 10 is that the are-tight puncture gold utensil of the present invention is used for the power frequency arc wiring schematic diagram in when test;
Figure 11 is that the are-tight puncture gold utensil of the present invention is used for the power frequency arc layout schematic diagram in when test;
Among the figure: briquetting 6 lower lock blocks 7 are-tight electrode 8 penetrating cable clamp insulating covers 9 are-tight electrode insulation cover 10 torsion nuts 11 grooves 12 are-tight puncture gold utensil 13 disk springs in 1 insulated conductor, 2 insulators, 3 ground connection arc electrodes, 4 upper holder blocks 5
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
As Fig. 1 are-tight puncture gold utensil of the present invention, comprising: the penetrating cable clamp, ground connection arc electrode 3, are-tight electrode 7, penetrating cable clamp insulating cover 8, the are-tight electrode insulation cover 9 that are made of upper holder block 4, middle briquetting 5, lower lock block 6 constitute.
Wherein, penetrating cable clamp penetrates the external insulation layer of insulated conductor, closely electrically contacts with insulated conductor 1 conductor inside, so that its current potential is identical; When thunder and lightning takes place, discharge between penetrating cable clamp lower platen 6 and the ground connection arc electrode 3, the afterflow power frequency arc moves on the are-tight electrode 7 and burns, thus protection insulated conductor 1 is injury-free.
And, must guarantee that the penetrating cable clamp of are-tight puncture gold utensil is identical with the current potential of are-tight electrode 7.Penetrating cable clamp and are-tight electrode 7 can adopt and compress, thread connection, also can become one by modes such as casting or machinings.For best aluminium alloy of penetrating cable clamp or copper product, for are-tight electrode 7 best aluminium alloys, copper or stainless steel material.
Wherein, for the suspended insulated guide wire 1 of unidirectional power supply power supply, are-tight puncture gold utensil is installed on line insulator (for example post insulator) 2 load side; For the suspended insulated guide wire 1 of bi-directional power power supply, are-tight puncture gold utensil be installed on line insulator (for example post insulator) 2 main suppliers of electricity to load side.Ground connection arc electrode 3 is electrically connected with the earth terminal of line insulator 2, and is positioned at the same side of this line insulator with the puncture gold utensil.
Above-mentioned ground connection arc electrode 3 is made by metal material, and can be shaft-like, ring-type or other shape, but will satisfy following requirement: ground connection arc electrode 3 be answered reliable ground, guarantees to be positioned at the penetrating cable clamp below, with penetrating cable clamp minimum spacing scope be the 80-450 millimeter.
Above-mentioned are-tight electrode 7 is made by metal or electric conducting material, can make separately, also can make one with penetrating cable clamp.Be illustrated in figure 2 as first embodiment of are-tight electrode, be swallow-tail form.Figure 3 shows that second embodiment of are-tight electrode, wherein two ends of are-tight electrode unite two into one, and perpendicular to insulated conductor, are vertical-type.Are-tight electrode 7 shape and size can have different choice, but satisfy following requirement: describe below with reference to Fig. 2, are-tight electrode 7 away from the end of insulated conductor 1 to the minimum perpendicular distance d1 of wire insulation and d2 greater than 30 millimeters, the end of its close insulated conductor 1 and the beeline d3 of wire insulation avoid electric arc to burn lead greater than 5 millimeters; The long more thickness of are-tight electrode is thin more, and the short more thickness of electrode is thick more, to guarantee that are-tight electrode can tolerate electric arc and burn.On the direction that is parallel to insulated conductor 1, the wide 0-700 millimeter of width (L1+L2) of the part that the end of are-tight electrode is more exposed than the puncture gold utensil, as shown in Figure 2, the x end is wanted the wide 0-350 millimeter (L1) that goes out, and the y end is also wide to go out 0-350 millimeter (L2); The axis of lead is between 5 °-90 ° at formed angle α 1, the α 2 of the projection on the horizontal plane in projection on the horizontal plane and are-tight electrode.
Fig. 4 shows first kind of form of the composition of the upper holder block 4 in the are-tight puncture gold utensil, center platen 5 and lower lock block 6, are-tight electrode 7 among Fig. 1.Middle briquetting 5 is the branch body structure with lower lock block 6, between briquetting 5 and the lower lock block 6, is fixed on one by torsion nut 10 during are-tight electrode 7 is pressed in.Show the are-tight puncture gold utensil of another kind of structure as Fig. 5, the middle briquetting 5 of penetrating cable clamp wherein, lower lock block 6 are processed as a global facility with are-tight electrode 7.The shape and size of upper, middle and lower briquetting can have different choice.
As shown in Figure 6, on upper holder block 4 and middle briquetting 5 and insulated conductor 2 contacted surfaces, be provided with groove 11, play the effect of fixing cord.The end radius of circle R of groove 11 and the radius of insulated conductor 2 are complementary, groove 11 middle parts are the cutter tooth of thorn-like, the quantity of cutter tooth is 6-48, the point of a knife of all cutters tooth is positioned on the cylindrical profile face that radius is R1, R1 and insulated conductor 1 conductor inside section radius are complementary, and error is positive and negative 5 millimeters.After last lower lock block compresses lead, be the 0.5-5 millimeter at a distance of the clearance distance D between the closest approach therebetween.
As shown in Figure 1, compress the upper, middle and lower briquetting, make cutter tooth penetrate lead external insulation layer and the inner tight electrical coupling of metal by torsion nut or aluminium nut 10.The regulation moment loading under make penetrating cable clamp both with the lead close-coupled, can not destroy insulated conductor 1 again.Be added with disk spring 13 between upper holder block and the torsion nut, quantity is 1～6, best 2, and adopt disk spring 13 to make the puncture structure under the power circuit service conditions of complexity, move more safe and reliable.
As shown in Figure 7, insulating cover 8 is positioned at the penetrating cable clamp outside, are-tight electrode insulation cover 9 is positioned at are-tight electrode 7 outsides, plays the insulating protection effect.Insulating cover 8, are-tight electrode insulation cover 9 adopt the organic composite material manufacturing, have good flame retardancy, weather resistance and insulation property.During making, are-tight electrode insulation cover 9 can be made as one with are-tight electrode.Figure 8 shows that the another kind of form of insulating cover, insulating cover 8 and are-tight electrode insulation cover 9 are made as a whole.Insulating cover 8 can have different shape and size with are-tight electrode insulation cover 9, also can make as a whole, but the end that should guarantee insulating cover, is along blow-by, gap along lead direction reservation at least 1 mm wide makes it possible to form exposed electric arc movable passageway in penetrating cable clamp, are-tight electrode 8 bottoms.
More than described the concrete structure that the present invention is used for the are-tight puncture gold utensil of suspended insulated guide wire,, further specified implementation result of the present invention below by test data.
A. lightning impulse discharge test
This test is in order to check under the lightning impulse effect, and whether can flashover all on are-tight puncture gold utensil 2, locate the power frequency arc path effectively.
Test connection as shown in Figure 9, each parts is respectively among the figure: impulse voltage generator G, oscilloscope S, resitstance voltage divider D, insulated conductor 1, line insulator 2, are-tight puncture gold utensil 12.Are-tight puncture gold utensil is installed in the load side of line insulator 2.Result of the test sees Table 1, and each discharge all occurs on the are-tight puncture gold utensil 12.
Puncture gold utensil lightning impulse test result that table 1 is are-tight
Result of the test shows, installs are-tight puncture gold utensil 12 of the present invention, all occurs on the are-tight puncture gold utensil 12 at flashover under the Lightning Over-voltage effect, can locate the power frequency arc footpath effectively.
B. power frequency arc test
Can this test be in order to check power frequency continued flow electric arc arc root behind the lightning stroke flashover be fixed on the effect that burning, are-tight puncture gold utensil 12 burn on the are-tight puncture gold utensil 12 degree and guardwire avoid burning.During test, test product is installed in the mains side of circuit.
Test connection as shown in figure 10, each parts is respectively among the figure: power supply P, switch tool K, transformer T, isolating switch K1, K2, reactor L1, current transformer CT, line insulator 2 and are-tight puncture gold utensil 12 are installed according to shown in Figure 11.The about 12.5kA of amplitude of short circuit, duration 0.23s, the test of the short circuit power frequency of closing a floodgate arcing.
Result of the test shows that are-tight puncture gold utensil 12 is installed in mains side, and electric arc arc root is fixed on the are-tight electrode of are-tight puncture gold utensil 12 and burns, and guardwire avoids burn effectively.
The are-tight electrode of the are-tight puncture gold utensil in test back burns vestige, but insulated conductor is not burnt.
Above result of the test shows that no matter are-tight puncture gold utensil of the present invention is mounted in mains side, or load side can both prevent 10kV suspended insulated guide wire lightning-caused breaking effectively.
In addition, line insulator in the are-tight puncture gold utensil of the present invention is not limited to the post insulator in the foregoing description, also can use the insulator of suspension insulator and other form, dependency structure can be changed accordingly with reference to foregoing, and this is very clearly for those of ordinary skills.
Although invention has been described; but foregoing description just for illustrative purposes; the invention is not restricted to above-mentioned specific descriptions in conjunction with the accompanying drawings; those of ordinary skills can not break away from the various changes of spirit of the present invention to it, and protection scope of the present invention is limited by the accompanying Claim book.
Claims (10)
1, a kind of are-tight puncture gold utensil that prevents that the suspended insulated guide wire lightning-caused breaking from using comprises:
Penetrate the insulating barrier of insulated conductor (1) and the penetrating cable clamp that inner conductor closely electrically contacts, the ground connection arc electrode (3) that is electrically connected with line insulator (2) earth terminal, the are-tight electrode (7) that is electrically connected with penetrating cable clamp, insulating cover, at the bottom of the insulating cover along blow-by, it is characterized in that the are-tight electrode (7) that is electrically connected with penetrating cable clamp adopts two-way are-tight electrode, is connected the both sides of penetrating cable clamp.
2, are-tight puncture gold utensil according to claim 1 is characterized in that described two-way are-tight electrode (7) is dove-tail form or vertical-type structure.
3, are-tight puncture gold utensil according to claim 1, it is characterized in that described penetrating cable clamp is made of upper holder block (4), middle briquetting (5) and lower lock block (6), adopt torsion nut (10) fixing between them, on upper holder block (4) and middle briquetting (5) and the contacted surface of insulated conductor (1), be provided with groove (11), the radius of the end radius of circle of groove (11) and insulated conductor (1) is complementary, groove (11) middle part is a plurality of cutters tooth of thorn-like, and the point of a knife of all cutters tooth and insulated conductor conductor inside section radius are complementary.
4, are-tight puncture gold utensil according to claim 3 is characterized in that described middle briquetting (5), lower lock block (6) are made as integrative-structure with are-tight electrode (7).
5, are-tight puncture gold utensil according to claim 3 is characterized in that described middle briquetting (5) is made as integrative-structure with lower lock block (6), and are-tight electrode (7) is electrically connected with it.
6, are-tight puncture gold utensil according to claim 3 is characterized in that described middle briquetting (5) and lower lock block (6) are the branch body structure, and are-tight electrode (7) is pressed between middle briquetting and the lower lock block.
7, are-tight puncture gold utensil according to claim 1 is characterized in that ground connection arc electrode (3) is positioned at the below of penetrating cable clamp, with the spacing of penetrating cable clamp be 80～450mm.
8, are-tight puncture gold utensil according to claim 1, it is characterized in that are-tight electrode (7) away from the end of insulated conductor (1) to the minimum perpendicular distance of wire insulation greater than 30 millimeters, the end of its close insulated conductor and the beeline of wire insulation are greater than 5 millimeters, be parallel on the direction of insulated conductor, the wide 0-350 millimeter of part difference that two ends of are-tight electrode are more exposed than the puncture gold utensil, the axis of lead is in respectively between 5 °-90 ° at the formed angle of the projection on the horizontal plane in projection on the horizontal plane and two are-tight electrodes.
9, are-tight puncture gold utensil according to claim 3 is characterized in that being added with disk spring (13) between described torsion nut (10) and the upper holder block (4).
10, are-tight puncture gold utensil according to claim 1 is characterized in that insulating cover (9) and the insulating cover (8) on the penetrating cable clamp on the are-tight electrode is branch body structure or integrative-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100696009A CN100550551C (en) | 2006-11-04 | 2006-11-04 | Prevent the are-tight puncture gold utensil that the suspended insulated guide wire lightning-caused breaking is used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100696009A CN100550551C (en) | 2006-11-04 | 2006-11-04 | Prevent the are-tight puncture gold utensil that the suspended insulated guide wire lightning-caused breaking is used |
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| CN101174765A CN101174765A (en) | 2008-05-07 |
| CN100550551C true CN100550551C (en) | 2009-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104779020A (en) * | 2015-03-31 | 2015-07-15 | 国家电网公司 | Asymmetric piercing electrode for piercing type lightning arrester |
| CN108257744A (en) * | 2018-01-12 | 2018-07-06 | 国家电网公司 | Overhead insulated conductor lightning protection strikes off line apparatus |
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Non-Patent Citations (2)
| Title |
|---|
| 防止10KV架空绝缘导线雷击断线用穿刺型防弧金具的研制. 陈维江，孙昭英等.电网技术，第29卷第20期. 2005 |
| 防止10KV架空绝缘导线雷击断线用穿刺型防弧金具的研制. 陈维江，孙昭英等.电网技术，第29卷第20期. 2005 * |
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Granted publication date: 20091014 Termination date: 20151104 |