CN100334784C - Arc-preventing metal utensil and its installation method - Google Patents
Arc-preventing metal utensil and its installation method Download PDFInfo
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- CN100334784C CN100334784C CNB011346671A CN01134667A CN100334784C CN 100334784 C CN100334784 C CN 100334784C CN B011346671 A CNB011346671 A CN B011346671A CN 01134667 A CN01134667 A CN 01134667A CN 100334784 C CN100334784 C CN 100334784C
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Abstract
The present invention discloses an arc-preventing metal utensil and an installation method thereof, wherein the arc-preventing metal utensil is composed of two semi-cylindrical bodies, and the middle parts of planes of the two semi-cylindrical bodies are provided with thin slots, wherein both ends of each thin slot are thick slots. Cambered surfaces of the semi-cylindrical bodies are provided with grooves, and mounting holes are arranged on the grooves. The arc-preventing metal utensil is arranged on a loading side of an insulated conductor, and the edge of the arc-preventing metal utensil has a distance of 100 to 150 millimeters with an axial line of an insulator. The arc-preventing metal utensil enables the insulated conductor to have the advantages of short peeling, small nudity, simple construction and less investment, and solves the defects of long conductor peeling, large nudity, complicated construction and installation and large investment of the prior art. The present invention fills blanks of domestic technologies.
Description
Technical field
The invention discloses a kind of arc-preventing metal utensil and installation method thereof, be used for electric power system distribution line field, be particularly suitable on the 10kV suspended insulated guide wire, using.
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 from the later stage in the sixties in the world.China begins that from the eighties city overhead distribution net is implemented insulating and transforms pilot.The nineties is an example with Beijing, and the insulating rate crosses 70.4%.
Insulated conductor has solved corridor that plain conductor can't resolve and safety problem really, compares with cable, reduced investment, builds soon, and advantage is fairly obvious.But the lightning-caused breaking problem is but very outstanding.Japan reaches a conclusion in the research of early seventies: the insulated conductor thunderbolt must be broken.1998, lightening activity was strong, the 10kV insulated overhead line generation lightning-caused breaking of Beijing Power Supply Bureau's administration 14 times.Therefore, the lightning-caused breaking problem must be properly settled, the safe operation of overhead insulating power distribution network could be guaranteed.
The thunderbolt resistance characteristics 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, lasting power frequency short circuit current electric arc moved to deviating from the power supply direction along lead under electrodynamic effect, can the serious burn lead.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 burn at the pin hole place, will be by neat blowing at extremely short time inside conductor.
According to the mechanism of above-mentioned insulated conductor lightning-caused breaking, at present, 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, insulating barrier employing arc protection molded lines folder is peeled off at insulator and wire coupling place by Finland; The Sweden and the U.S. peel off the insulated conductor of insulator both sides one section insulating barrier and install the preventing arc wire clamp additional; The wire insulation at insulator place is peeled off by Japan, adopts discharge clamp insulator." obstruction " is exactly to stop the power frequency continued flow starting the arc behind the lightning stroke flashover.For example, a large amount of current prevention and arc angles of adopting of Japan, the i.e. ring-like external series gap metal oxide arrester of band series connection.And studying two local wire insulations of strengthening of insulator, and prolong lightning stroke flashover path, reduce the method for power frequency arc probability of sustained arc.
Though can prevent lightning-caused breaking effectively, there are following deficiency in the said goods and their installation method:
1. present existing arc-preventing metal utensil, during installation, insulated conductor need be peeled off long length, and exposed part is bigger, and this can have certain influence to the sealing and the insulation of lead.
2. use lightning arrester, though protection effect is good, construction and installation complexity, investment are big.
Summary of the invention
The arc-preventing metal utensil and the installation method thereof that the purpose of this invention is to provide a kind of new structure, its have can make insulated conductor peel off short, exposed little, construction is simple, small investment, the characteristics of replenishing the domestic technique blank spot.
The object of the present invention is achieved like this: a kind of arc-preventing metal utensil, it is made up of laterally zygomorphic two bodies, body is a semicylinder, in-plane at the body semicylinder has stria, the two ends of stria are thick grooves, have groove on the cambered surface of body semicylinder, have installing hole on the groove.
Wherein, the height of body semicylinder is 80～120 millimeters, and the length of thick groove is 10～20 millimeters, and the radius of body semicylinder is 35～40 millimeters.
Specifically can be: the height of body semicylinder be 80 millimeters, and the length of thick groove is 10 millimeters, and the radius of body semicylinder is 35 millimeters; Or the height of body semicylinder is 90 millimeters, and the length of thick groove is 13 millimeters, and the radius of body semicylinder is 37 millimeters; Or the height of body semicylinder is 100 millimeters, and the length of thick groove is 15 millimeters, and the radius of body semicylinder is 38 millimeters; Or the height of body semicylinder is 110 millimeters, and the length of thick groove is 18 millimeters, and the radius of body semicylinder is 39 millimeters; Or the height of body semicylinder is 120 millimeters, and the length of thick groove is 20 millimeters, and the radius of body semicylinder is 40 millimeters.
The degree of depth radius of stria and the radius of plain conductor are complementary, and the degree of depth radius of thick groove and the radius of insulated conductor are complementary.
The degree of depth radius of stria is 5～10 millimeters, and the degree of depth radius of thick groove is 10～16 millimeters.
Specifically can be; The degree of depth radius of stria is 5 millimeters, and the degree of depth radius of thick groove is 10 millimeters; Or the degree of depth radius of stria is 6 millimeters, and the degree of depth radius of thick groove is 12 millimeters; Or the degree of depth radius of stria is 8 millimeters, and the degree of depth radius of thick groove is 14 millimeters; Or the degree of depth radius of stria is 9 millimeters, and the degree of depth radius of thick groove is 15 millimeters; Or the degree of depth radius of stria is 10 millimeters, and the degree of depth radius of thick groove is 16 millimeters.
The degree of depth of groove is higher than the nut height on the installing hole.
The degree of depth of groove is 15～20 millimeters, and the length of groove is 32～48 millimeters.
Specifically can be: the degree of depth of groove be 15 millimeters, and the length of groove is 32 millimeters; Or the degree of depth of groove is 16 millimeters, and the length of groove is 36 millimeters; Or the degree of depth of groove is 18 millimeters, and the length of groove is 40 millimeters; Or the degree of depth of groove is 19 millimeters, and the length of groove is 44 millimeters; Or the degree of depth of groove is 20 millimeters, and the length of groove is 48 millimeters.
Arc-preventing metal utensil installation method of the present invention is:
The first step, in the insulated conductor load side, to leave 170 millimeters places of insulator axis is the center, peels off the insulating barrier that a bit of length is H1-2D2 on insulated conductor, exposes plain conductor, wherein H1 represents the height of body semicylinder, and D2 represents stria degree of depth radius;
Second step, according to the nominal area of section of insulated conductor, the arc-preventing metal utensil that select the radius of the degree of depth radius of thick groove and insulated conductor to be complementary, stria degree of depth radius and plain conductor radius is complementary;
The 3rd step, install and fix arc-preventing metal utensil at the plain conductor place, the arc-preventing metal utensil edge to the distance of insulator axis in 100～150 millimeters scopes.
H1-2D2 in the first step is 12～8 millimeters, can be 12 millimeters, or 10 millimeters, or 8 millimeters.But be not limited in above-mentioned numerical value.
Arc-preventing metal utensil edge to the distance of insulator axis in the 3rd step is in 100 millimeters, 110 millimeters, 120 millimeters, 130 millimeters, 140 millimeters, 150 millimeters.But be not limited only to above-mentioned numerical value.
Advantage of the present invention is: 1, because arc-preventing metal utensil is installed in the load side of insulator (for the looped network circuit, all need to install at mains side and load side), on 100 to 150mm positions, distance insulator center, peel off the insulating barrier of a bit of insulated conductor, this installation site be through repeatedly, repeatedly the experiment, the best construction section that finally finds, arc-preventing metal utensil of the present invention is installed in this construction section, after the thunder discharge, the arc root of the power frequency short circuit current electric arc that continues all shifts and is fixed on the load side burning of arc-preventing metal utensil, thereby guardwire avoids burn; 2, external arc-preventing metal utensil structure need be peeled off long section insulated conductor, and arc-preventing metal utensil structure of the present invention, only need peel off a bit of insulating barrier, all be fixed on the arc root of lightning flash over and power frequency arc on the arc-preventing metal utensil, exposed part significantly reduces, 3, because arc-preventing metal utensil has been selected the thickness of optimal design for use, the relative lead of volume is bigger, stands burning of power frequency arc; 4, because the stria at arc-preventing metal utensil middle part can closely contact with plain conductor, and the thick groove in the two ends of arc-preventing metal utensil can closely contact with insulated conductor, when thunderbolt took place, guardwire was not struck off effectively; 5, arc-preventing metal utensil is quick and easy for installation, satisfies the action need of job site, and in the design of gold utensil, has taken into full account the arc resistance energy of gold utensil, and by test, optimal design has gone out gold utensil contour structures of the present invention; 6, the low cost of manufacture of this arc-preventing metal utensil, preventing arc is effective, and the solution of high performance-price ratio is provided for the anti-lightning strike broken string of present 10kV insulated conductor.
Below by test data, further specify implementation result of the present invention and advantage:
1, lightning impulse discharge test
This test is in order to check under the lightning impulse effect, and whether can flashover all on arc-preventing metal utensil 2, locate the power frequency arc path effectively.
Test connection as shown in Figure 6, each parts is respectively among the figure: impulse voltage generator G, oscilloscope S, resitstance voltage divider D, insulated conductor 7, insulator 6, arc-preventing metal utensil 2.Arc-preventing metal utensil 2 is installed in apart under insulator 6 center line 100mm and two kinds of situations of 150mm, and result of the test sees Table 1 and table 2, and each discharge all occurs on the arc-preventing metal utensil 2.But flashover path but has two kinds: the one, and the overwhelming majority (referring to Fig. 5) is along arc-preventing metal utensil 2-metal wiring 10-electric insulator steel foot 11, hereinafter to be referred as the right-angle line flashover; The 2nd, small part is along arc-preventing metal utensil 2-electric insulator steel foot 11, hereinafter to be referred as the oblique line flashover.
Table 1 arc-preventing metal utensil end result of the test under the 100mm situation of insulator center
| Flashover voltage kV | Discharge time delay μ s | Flashover mode (each voltage applies 20 times) | |
| Right-angle line flashover number of times | Oblique line flashover number of times | ||
| 226.5 | 4.73 | 20 | 0 |
| 253.6 | 2.41 | 7 | 13 |
| 284.5 | 1.8 | 17 | 3 |
| 306.4 | 1.45 | 20 | 0 |
| 320.5 | 1.20 | 20 | 0 |
| 344.3 | 1.00 | 20 | 0 |
| 363.6 | 0.86 | 20 | 0 |
Table 2 arc-preventing metal utensil end result of the test under the 150mm situation of insulator center
| Flashover voltage kV | Discharge time delay μ s | Flashover mode (each voltage applies 20 times) | |
| Right-angle line flashover number of times | Oblique line flashover number of times | ||
| 265.2 | 6.67 | 17 | 3 |
| 279.3 | 2.50 | 18 | 2 |
| 305.1 | 1.92 | 17 | 3 |
| 321.8 | 1.53 | 20 | 0 |
| 366.9 | 1.21 | 18 | 2 |
| 411.9 | 0.91 | 18 | 2 |
Result of the test shows, peel off the insulating barrier of a bit of insulated conductor on respectively apart from insulator center 100,150mm position, install arc-preventing metal utensil 2 of the present invention, all occur on the arc-preventing metal utensil 2, can locate the power frequency arc path effectively at flashover under the Lightning Over-voltage effect.
2, 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, arc-preventing metal utensil 2 burn on the arc-preventing metal utensil 2 degree and guardwire avoid burning.
Test connection as shown in Figure 7, each parts is respectively among the figure: power supply P, switch tool K, transformer T, isolating switch K1, K2, reactor L1, current transformer CT, insulator 6, arc-preventing metal utensil 2, install according to described method.At two kinds of different lightning flash over paths, the striking silk is connected between arc-preventing metal utensil 2-metal wiring 10-electric insulator steel foot 11 (squares), or between the arc-preventing metal utensil 2-electric insulator steel foot 11 (linear).Respectively repeatedly close a floodgate short circuit power frequency arcing test of the about 12.5kA of amplitude of short circuit, duration 0.23s, dual mode.
Result of the test shows that arc-preventing metal utensil 2 is installed in load side, and electric arc arc root is fixed on the load side burning of arc-preventing metal utensil 2, and guardwire avoids burn effectively.
Above result of the test shows that the present invention can prevent 10kV suspended insulated guide wire lightning-caused breaking effectively.
Description of drawings
Fig. 1 is the main schematic diagram of looking of arc-preventing metal utensil of the present invention (half);
Fig. 2 is an arc-preventing metal utensil schematic top plan view of the present invention;
Fig. 3 is an arc-preventing metal utensil schematic side view of the present invention;
Fig. 4 is that arc-preventing metal utensil of the present invention is installed partial schematic diagram;
Fig. 5 is an arc-preventing metal utensil scheme of installation of the present invention;
Fig. 6 is that the present invention is used for lightning impulse discharge test wiring schematic diagram;
Fig. 7 is that the present invention is used for the power frequency arc wiring schematic diagram in when test.
Embodiment
In conjunction with the embodiments structure of the present invention is described further below by accompanying drawing:
Embodiment 1:
As shown in Figure 1, 2, 3, a kind of arc-preventing metal utensil, it is made up of laterally zygomorphic two bodies 2;
Body 2 is a semicylinder (or similar semicylinders), and the height H 1 of body 2 semicylinders can be 80～120 millimeters, and the radius R of body 2 semicylinders can be 35～40 millimeters;
In-plane at body 2 semicylinders has stria 5, and the degree of depth radius R of stria 52 is complementary with the radius of plain conductor, and R2 can be 5～10 millimeters, and the semicylinder height H 1 that the length of stria 5 equals body 1 deducts the length D2 of two thick grooves 1; The two ends of stria 5 are thick grooves 1, and the degree of depth radius R 1 of thick groove 1 is complementary with the radius of insulated conductor, and R1 can be 10～16 millimeters, and the length D2 of thick groove 1 can be 10～20 millimeters; Have groove 3 on the cambered surface of body 2 semicylinders, have two installing holes 4 on the groove 3, the depth D 1 of groove 3 is higher than the nut height of being installed on the installing hole 4, and D1 can be 15～20 millimeters, and the length H2 of groove 3 can be 32～48 millimeters.
Preferred structure of the present invention is: the radius R of body 2 semicylinders is 35 millimeters, the height H 1 of body 2 semicylinders is 80 millimeters, the length H2 of groove 3 is 32 millimeters, the depth D 1 of groove 3 is 15 millimeters, the length D2 of thick groove 1 is 10 millimeters, the degree of depth radius R 1 of thick groove 1 is 10 millimeters, and the degree of depth radius R 2 of stria 5 is 5 millimeters, and the length of stria 5 is 12 millimeters;
Or the radius R of body 2 semicylinders is 37 millimeters, the height H 1 of body 2 semicylinders is 90 millimeters, the length H2 of groove 3 is 36 millimeters, the depth D 1 of groove 3 is 16 millimeters, the length D2 of thick groove 1 is 13 millimeters, the degree of depth radius R 1 of thick groove 1 is 12 millimeters, and the degree of depth radius R 2 of stria 5 is 6 millimeters, and the length of stria 5 is 10 millimeters;
Or the radius R of body 2 semicylinders is 38 millimeters, the height H 1 of body 2 semicylinders is 100 millimeters, the length H2 of groove 3 is 40 millimeters, the depth D 1 of groove 3 is 18 millimeters, the length D2 of thick groove 1 is 15 millimeters, the degree of depth radius R 1 of thick groove 1 is 14 millimeters, and the degree of depth radius R 2 of stria 5 is 8 millimeters, and the length of stria 5 is 10 millimeters;
Or the radius R of body 2 semicylinders is 39 millimeters, the height H 1 of body 2 semicylinders is 110 millimeters, the length H2 of groove 3 is 44 millimeters, the depth D 1 of groove 3 is 19 millimeters, the length D2 of thick groove 1 is 18 millimeters, the degree of depth radius R 1 of thick groove 1 is 15 millimeters, and the degree of depth radius R 2 of stria 5 is 9 millimeters, and the length of stria 5 is 8 millimeters;
Or the radius R of body 2 semicylinders is 40 millimeters, the height H 1 of body 2 semicylinders is 120 millimeters, the length H2 of groove 3 is 48 millimeters, the depth D 1 of groove 3 is 20 millimeters, the length D2 of thick groove 1 is 20 millimeters, the degree of depth radius R 1 of thick groove 1 is 16 millimeters, and the degree of depth radius R 2 of stria 5 is 10 millimeters, and the length of stria 5 is 8 millimeters.
Content of the present invention is not limited in the listed content of present embodiment.
As Fig. 4, shown in 5, installation method of the present invention is: select the arc-preventing metal utensil of corresponding model (promptly to select the degree of depth radius R 2 of installation back stria 5 and the radius of plain conductor 8 to be complementary according to the nominal area of section of insulated conductor, the arc-preventing metal utensil that the degree of depth radius R 1 of thick groove 1 and the radius of insulated conductor 7 are complementary), to leave 170 millimeters places of insulator axis is the center, peel off a bit of (length is H1-2D2) insulating barrier, load onto arc-preventing metal utensil, tight a bolt and (clamped by arc-preventing metal utensil for guaranteeing lead, after tighting a bolt, 2 of two bodies can have 3 millimeters tolerance clearance), and measurement arc-preventing metal utensil edge is to the distance L of insulator axis, if L is in 100～150 millimeters scopes, installation qualification then, otherwise, suitable adjustment be done.
Claims (12)
1, a kind of arc-preventing metal utensil, it is made up of laterally zygomorphic two bodies (2), it is characterized in that: body (2) is a semicylinder, in-plane at body (2) semicylinder has stria (5), the two ends of stria (5) are thick groove (1), have groove (3) on the cambered surface of body (2) semicylinder, have installing hole (4) on the groove (3).
2, a kind of arc-preventing metal utensil as claimed in claim 1 is characterized in that: the height (H1) of body (2) semicylinder is 80～120 millimeters, and the length (D2) of thick groove (1) is 10～20 millimeters, and the radius (R) of body (2) semicylinder is 35～40 millimeters.
3, a kind of arc-preventing metal utensil as claimed in claim 2 is characterized in that: the height (H1) of body (2) semicylinder is 80 millimeters, and the length (D2) of thick groove (1) is 10 millimeters, and the radius (R) of body (2) semicylinder is 35 millimeters; Or the height (H1) of body (2) semicylinder is 90 millimeters, and the length (D2) of thick groove (1) is 13 millimeters, and the radius (R) of body (2) semicylinder is 37 millimeters; Or the height (H1) of body (2) semicylinder is 100 millimeters, and the length (D2) of thick groove (1) is 15 millimeters, and the radius (R) of body (2) semicylinder is 38 millimeters; Or the height (H1) of body (2) semicylinder is 110 millimeters, and the length (D2) of thick groove (1) is 18 millimeters, and the radius (R) of body (2) semicylinder is 39 millimeters; Or the height (H1) of body (2) semicylinder is 120 millimeters, and the length (D2) of thick groove (1) is 20 millimeters, and the radius (R) of body (2) semicylinder is 40 millimeters.
4, as claim 1 or 2 or 3 described a kind of arc-preventing metal utensils, it is characterized in that: the degree of depth radius (R2) of stria (5) is complementary with the radius of plain conductor, and the degree of depth radius (R1) of thick groove (1) is complementary with the radius of insulated conductor.
5, a kind of arc-preventing metal utensil as claimed in claim 4 is characterized in that: the degree of depth radius (R2) of stria (5) is 5～10 millimeters, and the degree of depth radius (R1) of thick groove (1) is 10～16 millimeters.
6, a kind of arc-preventing metal utensil as claimed in claim 5 is characterized in that: the degree of depth radius (R2) of stria (5) is 5 millimeters, and the degree of depth radius (R1) of thick groove (1) is 10 millimeters; Or the degree of depth radius (R2) of stria (5) is 6 millimeters, and the degree of depth radius (R1) of thick groove (1) is 12 millimeters; Or the degree of depth radius (R2) of stria (5) is 8 millimeters, and the degree of depth radius (R1) of thick groove (1) is 14 millimeters; Or the degree of depth radius (R2) of stria (5) is 9 millimeters, and the degree of depth radius (R1) of thick groove (1) is 15 millimeters; Or the degree of depth radius (R2) of stria (5) is 10 millimeters, and the degree of depth radius (R1) of thick groove (1) is 16 millimeters.
7, a kind of arc-preventing metal utensil as claimed in claim 6 is characterized in that: the degree of depth (D1) of groove (3) is higher than the nut height on the installing hole (4).
8, a kind of arc-preventing metal utensil as claimed in claim 7 is characterized in that: the degree of depth (D1) of groove (3) is 15～20 millimeters, and the length (H2) of groove (3) is 32～48 millimeters.
9, a kind of arc-preventing metal utensil as claimed in claim 8 is characterized in that: the degree of depth (D1) of groove (3) is 15 millimeters, and the length (H2) of groove (3) is 32 millimeters; Or the degree of depth (D1) of groove (3) is 16 millimeters, and the length (H2) of groove (3) is 36 millimeters; Or the degree of depth (D1) of groove (3) is 18 millimeters, and the length (H2) of groove (3) is 40 millimeters; Or the degree of depth (D1) of groove (3) is 19 millimeters, and the length (H2) of groove (3) is 44 millimeters; Or the degree of depth (D1) of groove (3) is 20 millimeters, and the length (H2) of groove (3) is 48 millimeters.
10, as each described a kind of arc-preventing metal utensil among the claim 1-3, it is characterized in that: the degree of depth (D1) of groove (3) is higher than the nut height on the installing hole (4).
11, as the installation method of each described arc-preventing metal utensil among the claim 1-10, it is characterized in that:
The first step, in the insulated conductor load side, to leave 170 millimeters places of insulator (6) axis is the center, on insulated conductor (7), peel off the insulating barrier that a bit of length is H1-2D2, expose plain conductor (8), wherein H1 represents the height of body (2) semicylinder, and D2 represents stria (5) degree of depth radius;
Second step, according to the nominal area of section of insulated conductor (7), the arc-preventing metal utensil that the degree of depth radius (R1) of selecting thick groove (1) is complementary with the radius of insulated conductor (7), stria (5) degree of depth radius (R2) and plain conductor (8) radius are complementary;
The 3rd step, locate to install and fix arc-preventing metal utensil at plain conductor (8), the arc-preventing metal utensil edge to the distance (L) of insulator (6) axis in 100～150 millimeters scopes.
12, the installation method of arc-preventing metal utensil as claimed in claim 11 is characterized in that: the H1-2D2 in the first step is 12～8 millimeters, can be 12 millimeters, or 10 millimeters, or 8 millimeters; Arc-preventing metal utensil edge to the distance (L) of insulator (6) axis in the 3rd step is in 100 millimeters, 110 millimeters, 120 millimeters, 130 millimeters, 140 millimeters, 150 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011346671A CN100334784C (en) | 2001-11-09 | 2001-11-09 | Arc-preventing metal utensil and its installation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011346671A CN100334784C (en) | 2001-11-09 | 2001-11-09 | Arc-preventing metal utensil and its installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1417912A CN1417912A (en) | 2003-05-14 |
| CN100334784C true CN100334784C (en) | 2007-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011346671A Expired - Lifetime CN100334784C (en) | 2001-11-09 | 2001-11-09 | Arc-preventing metal utensil and its installation method |
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| CN (1) | CN100334784C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102290775B (en) * | 2011-04-26 | 2015-03-25 | 国家电网公司 | Lightning-caused breaking prevention method for 10kV overhead insulating line |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4396968A (en) * | 1982-09-22 | 1983-08-02 | Westinghouse Electric Corp. | Fused distribution power system with clamp device for preventing arc damage to insulated distribution conductors |
| US4396794A (en) * | 1981-03-30 | 1983-08-02 | Westinghouse Electric Corp. | Arc protection clamp and arrangement for covered overhead power distribution lines |
| GB2315166A (en) * | 1996-07-06 | 1998-01-21 | Ccl Systems Ltd | Arc protection clamping connector |
| CN2517157Y (en) * | 2001-11-09 | 2002-10-16 | 中国电力科学研究院 | Flash guard hardware mounted on load side of insulation aerial wire insulator |
-
2001
- 2001-11-09 CN CNB011346671A patent/CN100334784C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4396794A (en) * | 1981-03-30 | 1983-08-02 | Westinghouse Electric Corp. | Arc protection clamp and arrangement for covered overhead power distribution lines |
| US4396968A (en) * | 1982-09-22 | 1983-08-02 | Westinghouse Electric Corp. | Fused distribution power system with clamp device for preventing arc damage to insulated distribution conductors |
| GB2315166A (en) * | 1996-07-06 | 1998-01-21 | Ccl Systems Ltd | Arc protection clamping connector |
| CN2517157Y (en) * | 2001-11-09 | 2002-10-16 | 中国电力科学研究院 | Flash guard hardware mounted on load side of insulation aerial wire insulator |
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| Publication number | Publication date |
|---|---|
| CN1417912A (en) | 2003-05-14 |
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