KR20140033942A - Yoke of suspending insulator for supporting 3 electric wires - Google Patents

Yoke of suspending insulator for supporting 3 electric wires Download PDF

Info

Publication number
KR20140033942A
KR20140033942A KR1020120100524A KR20120100524A KR20140033942A KR 20140033942 A KR20140033942 A KR 20140033942A KR 1020120100524 A KR1020120100524 A KR 1020120100524A KR 20120100524 A KR20120100524 A KR 20120100524A KR 20140033942 A KR20140033942 A KR 20140033942A
Authority
KR
South Korea
Prior art keywords
yoke
suspension
pair
length
insulator device
Prior art date
Application number
KR1020120100524A
Other languages
Korean (ko)
Inventor
김영홍
신구용
임재섭
최인혁
이동일
이형권
Original Assignee
한국전력공사
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 한국전력공사 filed Critical 한국전력공사
Priority to KR1020120100524A priority Critical patent/KR20140033942A/en
Publication of KR20140033942A publication Critical patent/KR20140033942A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/02—Suspension insulators; Strain insulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/05—Suspension arrangements or devices for electric cables or lines
    • H02G7/053—Suspension clamps and clips for electric overhead lines not suspended to a supporting wire

Landscapes

  • Insulators (AREA)

Abstract

The present invention relates to a yoke for a suspension insulator for an assembly of three electric wires. The yoke includes/: a length unit; and a pair of projections protruding from each side of the length unit. An insulator assembly connection hole for connecting an insulator assembly is formed at one end of the length unit, and a suspension clamp connection hole is formed at the other end of the length unit. Each of the projection units has a suspension clamp connection hole. By supporting three electric wires using a single yoke, the yoke for a suspension insulator for an assembly of three electric wires given in the present invention supports the three electric wires appropriate for DC transmission, accordingly increases utilization of a DC line, and facilitates attachment and installation of an arcing horn. In addition, by integrating the yoke for a suspension insulator, it is expected that the manufacturing process becomes convenient, manufacturing costs and resources are reduced, and maintenance costs are minimized as mechanical defects are prevented because the composition of components is not complex. Furthermore, by arranging the three electric wires in an inverted triangle shape, maintenance work becomes convenient and supporting force for the three electric wires can be increased. Also, as working holes for maintenance or wiring of the suspension insulator are additionally designed, convenience of maintenance work can be improved.

Description

YOKE OF SUSPENDING INSULATOR FOR SUPPORTING 3 ELECTRIC WIRES}

The present invention relates to a yoke for a three-conductor single suspension insulator device, and more particularly, a three-conductor 1 capable of supporting three wires in an inverted triangular arrangement in a single suspension insulator device used in a suspension steel tower of a overhead transmission line. The present invention relates to a yoke for a three-conductor single suspension insulator device for providing a yoke for a continuous suspension insulator device, which is convenient for fabrication and that there is no fear of mechanical defects.

Suspension insulators are used in transmission pylons installed in Korea, and suspension insulators support wires in suspension-type pylons. The number of wires forming a phase in a overhead transmission line is one or more. The higher the transmission voltage, the more the number of wires forming a phase for reducing corona generation.

In general, two wires constitute a single phase in a 154kV transmission line, and two or four wires constitute a single phase in a 345kV transmission line. In the 765kV transmission line, six wires each form one phase. As such, the number of wires forming a phase may vary depending on a transmission voltage and a transmission capacity.

On the other hand, in Korea, due to the need for direct current transmission, there is a need for a transmission line in which three wires form one phase. Conventionally, two, four or six wires form a single phase, so only two, four or six conductor suspension insulators capable of supporting two, four or six wires in a transmission tower It was utilized. Therefore, development of the suspension insulator device for three conductors has been calculated | required.

On the other hand, Korean Patent Laid-Open No. 10-2000-0026776 discloses a six-conductor V insulator. However, even with the above configuration, there are limitations in that three wires cannot be connected to a child drill with one phase.

An object of the present invention is to support three wires by one yoke and to install three arcing horns at the same time by supporting the three wires by one yoke, and to provide an arcing horn. Yoke for insulators are integrated to make manufacturing easier and reduce manufacturing cost and manpower. Minimize maintenance cost due to no mechanical defects. Consist of three conductors in an inverted triangle arrangement. At the same time, to provide a yoke for a three-conductor single suspension insulator device to increase the bearing capacity.

The yoke for the three-conductor single suspension insulator device according to the present invention for achieving the above object comprises a pair of protrusions protruding on both sides of the length portion and the length portion, respectively, one end of the length It is characterized in that a single connection hole is formed that can be connected, a suspension clamp connection hole is formed at the other end of the length, a pair of protrusions are characterized in that each of the suspension clamp connection hole is formed.

In addition, the three suspension clamp connection holes of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that arranged in an inverted triangle shape.

In addition, the length of the yoke for the three conductor single suspension insulator device according to the invention is characterized in that the width becomes narrower toward the end.

In addition, a pair of arcing horn attachment holes for engaging the arcing horn is formed in the central portion of the length of the yoke for the three-conductor single suspension insulator device according to the present invention.

In addition, the pair of arcing horn attachment holes of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that each of the arcing horn is coupled.

In addition, the length of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that a pair of length working holes for fixing the wire during the wire replacement or repair work is formed.

In addition, the protrusion of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that a pair of holes for the work of the projection for fixing the wire during the wire replacement or repair work is formed.

In addition, the length of the yoke for the three-conductor single suspension insulator device according to the present invention is provided with a pair of length working holes for fixing the wire during the wire replacement or repair work, the protruding portion of the wire for the wire replacement or repair work A pair of protrusion working holes are formed to fix the pair, and a pair of protrusion working holes is formed so that the area of the hole is larger than the pair of length working holes.

In addition, each of the suspension clamp connection holes of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that the suspension clamp for connecting the electric wire is coupled.

In addition, the suspension clamp connection hole and the suspension clamp of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that the screw is coupled.

In addition, each of the suspension clamps of the yoke for the three-conductor single suspension insulator device according to the present invention is characterized in that the clamping hole is formed so that the wires can be coupled and fixed.

According to the present invention, by supporting three wires by one yoke can support three conductors suitable for direct current transmission can increase the utilization of the DC line and at the same time can easily attach and install the arcing horn. In addition, by integrally configuring the yoke for the suspension insulator device, the production is convenient, manufacturing cost and manufacturing manpower is reduced, there is no configuration of complex parts, there is no effect of the occurrence of mechanical defects can minimize the maintenance cost.

In addition, by constructing an inverted triangular array of three conductors, maintenance and repair work can be performed conveniently, and the supporting force of the three conductors can be enhanced. The work hole can be used for maintenance and wire work of the suspension insulator. The additional design has the effect of increasing the convenience of maintenance work.

1 is a front view of a yoke for a three-conductor single suspension insulator device according to an embodiment of the present invention.
Figure 2 is a perspective view of the suspension clamp is coupled to the yoke for the three-conductor single suspension insulator device according to an embodiment of the present invention.
3 is a front use state diagram of a yoke for a three-conductor single suspension insulator device according to an embodiment of the present invention.
Figure 4 is a side use state diagram of the yoke for the three-conductor single suspension insulator device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of a yoke for a three-conductor single suspension insulator device according to an embodiment of the present invention.

The yoke for the three conductor single suspension insulator device according to the embodiment of the present invention includes a length portion 100. On both sides of the length part 100, a pair of protrusions 200 protruding from each other are formed. In particular, the protrusions 200 are preferably formed on both sides of the upper portion of the length part 100, respectively. As a pair of protrusions 200 are formed on both sides of the length part 100, the yoke forms a T shape. Thus, by forming a pair of protrusions 200 on both sides of the length portion 100 to form the yoke in a T-shape, the center of gravity of the yoke is formed close to the steel tower, so that the yoke is more robust when clamping the wire Can be clamped stably.

In addition, the length part 100 and the pair of protrusions 200 are integrated to form a yoke. Accordingly, the manufacturing process of the yoke can omit the complicated manufacturing process by forging or casting, and has an excellent effect that can be produced only by cutting and processing ordinary steel sheets so as not to produce defective products in the manufacturing process.

The length part 100 may be formed to be narrower in width from one end of the length part 100 to the other end. By forming the width of the length portion 100 to be narrower toward the lower side to minimize the area of the length corresponding to the portion for clamping the wire, it is possible to clamp the wire more stably by minimizing the load supporting the wire.

One end of the length portion 100 of the yoke is formed with a single insulated connection hole 110 that can connect a single insulator. Since a single insulator means that only one insulator is connected to the yoke, the single insulator connection hole 110 is formed of only one hole. One end of the length portion 100 in which the single intimate connection hole 110 is formed is preferably formed to slightly protrude in the longitudinal direction of the length portion 100. One end of the length portion 100 in which the single intimate connection hole 110 is formed may be formed to protrude slightly in the longitudinal direction of the length part 100, thereby facilitating connection and detachment of the single intimacy.

At the other end of the length part 100, a suspension clamp connection hole 120c is formed. In addition, the pair of protrusions 200 are provided with suspension clamp connection holes 120a and 120b, respectively.

Suspension clamp connection hole (120c) is preferably formed at the lower end of the length portion (100). That is, it is preferable that the suspension clamp connection hole 120c is formed at the narrowest portion of the end of the length part 100 because the width of the length part 100 is gradually narrowed.

The pair of suspension clamp connection holes 120a and 120b formed in each of the pair of protrusions 200 are preferably formed at the lowermost end of each of the protrusions 200. That is, it is preferably formed at the most end of the portion protruding from the protrusion 200. This is to increase the bearing capacity of the wire by clamping the wire by minimizing the load applied to the yoke by widening the interval where the yoke clamps the wire as much as possible.

Therefore, one suspension clamp connection hole 120c of the three suspension clamp connection holes 120a, 120b and 120c is formed in the length portion 100, and the other two suspension clamp connection holes 120a and 120b are paired. Are formed on the protrusions 200, respectively. Thus, three suspension clamp connection holes 120a, 120b, and 120c are formed in the yoke to clamp three wires with one yoke, and are useful for a transmission line in which three wires form a phase according to the necessity of direct current transmission. Can be utilized.

Three suspension clamp connection holes (120a, 120b, 120c) is preferably formed in an inverted triangle shape. That is, the suspension clamping connection hole 120c formed at the other end of the length part 100 corresponds to the position of the lower vertex of the inverted triangle. As described above, the three suspension clamp connection holes 120a, 120b, and 120c may be formed in an inverted triangle shape so that three wires may be arranged in an inverted triangle arrangement. In addition, by supporting two relatively large wires in a pair of protrusions 200 close to the center of gravity of the yoke, and supporting a relatively small wire at the lowermost end of the length portion 100 of the yoke 3 Optimum balance is achieved for supporting the strands of wires.

A pair of arcing horn attachment holes 130a and 130b are formed in the central portion of the length portion 100 of the yoke. The arcing horn may be coupled to the arcing horn attachment holes 130a and 130b, and the arcing horn may be fixed by screwing by a bolt.

In the length part 100 of the yoke, a pair of length work holes 140a and 140b may be formed to fix the wire in the wire replacement or repair work. When replacing or repairing the electric wire clamped by the yoke, a place for the electric wire previously connected to the yoke is required. Therefore, as the wires previously clamped by the yoke are mounted on the length working holes 140a and 140b, it is possible to more easily perform the wire replacement work or the repair work.

The protrusion 200 of the yoke may have a pair of protrusion working holes 150a and 150b for fixing the wire at the time of wire replacement or repair. When replacing or repairing the electric wire clamped by the yoke, a place for the electric wire previously connected to the yoke is required. Accordingly, as the wires previously clamped by the yoke are mounted on the protruding holes 150a and 150b, the wire replacement work or the repair work can be performed more easily.

It is preferable that the pair of protrusion working holes 150a and 150b have a larger area than the pair of length working holes 140a and 140b. As the area of the protrusion work holes 150a and 150b and the length work holes 140a and 140b are different, the protrusion work holes 150a and 150b or the length work are alternatively selected according to the thickness of the wire to be subjected to the maintenance work. The operation may be performed by selecting from the holes 140a and 140b.

Figure 2 is a perspective view of the suspension clamp is coupled to the yoke for the three-conductor single suspension insulator device according to an embodiment of the present invention.

Suspension clamps 121a, 121b, 121c are coupled to each of the three suspension clamp connection holes 120a, 120b, and 120c. One suspension clamp 121a, 121b, 121c clamps one wire. That is, three suspension clamp connection holes 120a, 120b and 120c are formed in the yoke, and one suspension clamp 121a, 121b and 121c is formed in each of the suspension clamp connection holes 120a, 120b and 120c. The yoke can clamp three wires.

Each of the suspension clamps 121a, 121b, and 121c corresponding to the suspension clamp connection holes 120a, 120b, and 120c may be screwed together. In addition, the yoke and the suspension clamps 121a, 121b, 121c are perpendicular to each other when the actual suspension clamps 121a, 121b, 121c are suspended. Therefore, the suspension clamps 121a, 121b, and 121c must be coupled to rotate at least a predetermined angle about the suspension clamp connection holes 120a, 120b, and 120c while the suspension clamps 121a, 121b, and 121c are connected to the suspension clamp connection holes 120a, 120b, and 120c. . After rotating the suspension clamps 121a, 121b and 121c at a desired angle, the suspension clamps 121a, 121b and 121c are fixed to the suspension clamp connection holes 120a, 120b and 120c through screwing.

The clamping holes 122a, 122b and 122c are formed in the suspension clamps 121a, 121b and 121c, respectively. One clamping hole 122a, 122b, 122c is formed in one suspension clamp 121a, 121b, 121c. One clamping hole 122a, 122b, 122c clamps one wire and fixes it to the yoke. Therefore, one yoke can clamp three wires, thereby making a transmission line in which three wires form a phase.

3 and 4 are a front use state and a side use state diagram of the yoke for the three conductor single suspension insulator device according to an embodiment of the present invention. Hereinafter, an application example of the yoke for the three-conductor single suspension insulator device according to the embodiment of the present invention will be described with reference to FIGS. 3 and 4.

First, a steel tower fixing part 20 is formed to suspend a single insulator 10 to a steel tower. Pylon insulator 10 is connected to the pylon fixing part 20, it is preferable that the single insulator 10 and the tower fixing part 20 is screwed. Single insulator 10 is formed by combining a plurality of insulator in the height direction.

An arcing horn 131 is installed between the tower fixing part 20 and the single ingot 10. Arcing horn 131, when a high voltage current flows into the pylon unexpectedly due to lightning or other natural disasters, the current passes through the pylon fixing part 20 to a single insulator (10), so 10) It is installed to prevent burning or damage.

The bottom of the single insulator 10 is connected to the single insulator connection hole 110 formed in the length portion 100 of the yoke for the three conductors single suspension insulator device. That is, the single insulator 10 is coupled to the single insulator connection hole 110 formed at one end of the length part 100 of the yoke.

The arcing horn 132 is coupled to the arcing horn attachment holes 130a and 130b formed at the central portion of the length part 100. Arcing horn 132 is a high-voltage current flowing into the wire or suspension clamps (121a, 121b, 121c) due to lightning or other natural disasters, the current passes through the yoke rye (10) It is installed in order to prevent the single insulator 10 burned or damaged.

Suspension clamps 121a, 121b and 121c are coupled to the three suspension clamp connection holes 120a, 120b and 120c respectively formed in the length part 100 and the pair of protrusions 200, respectively. At this time, the suspension clamps 121a, 121b and 121c are preferably screwed to the suspension clamp connection holes 120a, 120b and 120c. Each suspension clamp 121a, 121b, 121c forms a clamping hole 122a, 122b, 122c, respectively, and each clamping hole 122a, 122b, 122c clamps one wire, respectively.

The three suspension clamp connection holes 120a, 120b, and 120c are arranged in an inverted triangle shape. Therefore, the three suspension clamps 121a, 121b and 121c coupled to the three suspension clamp connection holes 120a, 120b and 120c are also arranged in an inverted triangle shape. Thus, the three wires clamped by each of the suspension clamps 121a, 121b, 121c are also arranged in an inverted triangle shape. Therefore, two wires with a relatively large load are connected to two suspension clamps 121a and 121b formed close to the center of gravity of the yoke, and one wire with a relatively small load is separated from the yoke's center of gravity by a distance. It is connected to the suspension clamp 121c. This increases the bearing capacity of the electric wires coupled to the yoke and enables the clamping of the electric wires stably through the connection of three balanced electric wires.

According to the present invention as described above, by supporting three wires by one yoke can support the three conductors suitable for direct current transmission can increase the utilization of the DC line and at the same time can be easily attached and installed arcing horn. In addition, by integrally configuring the yoke for the suspension insulator device, the production is convenient, manufacturing cost and manufacturing manpower is reduced, there is no configuration of complex parts, there is no effect of the occurrence of mechanical defects can minimize the maintenance cost. In addition, by constructing an inverted triangular array of three conductors, maintenance and repair work can be performed conveniently, and the supporting force of the three conductors can be enhanced. The work hole can be used for maintenance and wire work of the suspension insulator. The additional design has the effect of increasing the convenience of maintenance work.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: single love 20: pylon connection
100: length 110: single intimate connection hole
120a, 120b, 120c: suspension clamp connection hole
121a, 121b, 121c: suspension clamps 122a, 122b, 122c: clamping holes
130a, 130b: arcing horn attachment holes 131, 132: arcing horn
140a, 140b: Length Work Holes
150a, 150b: protrusion working hole 200: protrusion

Claims (11)

Length; And
It includes a pair of protrusions each protruding on both sides of the length,
One end of the length portion is formed with a single intimate connection hole that can connect a single intimate
Suspension clamp connection hole is formed at the other end of the length portion,
Yoke for a three-conductor single suspension insulator device characterized in that each of the pair of protrusions is formed with a suspension clamp connection hole. The method according to claim 1,
Yoke for a three-conductor double suspension insulator device characterized in that the three suspension clamp connection holes are arranged in an inverted triangle shape. The method according to claim 1,
Yoke for a three-conductor single suspension insulator device, characterized in that the length portion becomes narrower toward the end. The method according to claim 1,
Yoke for a three-conductor double suspension insulator device characterized in that a pair of arcing horn attachment holes for engaging the arcing horn is formed in the central portion of the length. The method of claim 4,
Yoke for a three-conductor double suspension insulator device characterized in that each of the pair of arcing horn attachment holes are combined with the arcing horn. The method according to claim 1,
Yoke for a three-conductor single-suspend insulator device characterized in that the length portion is formed with a pair of holes for the length work for fixing the wire during the wire replacement or repair work. The method according to claim 1,
Yoke for a three-conductor single suspension insulator device characterized in that the projecting portion is formed with a pair of projecting hole for fixing the wire during the wire replacement or repair work. The method according to claim 1,
The length portion is formed with a pair of length work hole for fixing the wire during wire replacement or repair work,
The projecting portion is formed with a pair of projecting hole for fixing the electric wire in the wire replacement or repair work,
The yoke for the three conductor single suspension insulator device, wherein the pair of protruding work holes are formed to have a larger area of the hole than the pair of prolonged work holes. The method according to claim 1,
Yoke for a three-conductor double suspension insulator device, characterized in that each of the suspension clamp connection holes are coupled to the suspension clamp to connect the electric wire. The method of claim 9,
Yoke for a three-conductor single suspension insulator device characterized in that the suspension clamp connection hole and the suspension clamp is screwed. The method of claim 9,
Each of the suspension clamps yoke for a three-conductor double suspension insulator device characterized in that the clamping hole is formed so that the wire can be fixed.
KR1020120100524A 2012-09-11 2012-09-11 Yoke of suspending insulator for supporting 3 electric wires KR20140033942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120100524A KR20140033942A (en) 2012-09-11 2012-09-11 Yoke of suspending insulator for supporting 3 electric wires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120100524A KR20140033942A (en) 2012-09-11 2012-09-11 Yoke of suspending insulator for supporting 3 electric wires

Publications (1)

Publication Number Publication Date
KR20140033942A true KR20140033942A (en) 2014-03-19

Family

ID=50644658

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120100524A KR20140033942A (en) 2012-09-11 2012-09-11 Yoke of suspending insulator for supporting 3 electric wires

Country Status (1)

Country Link
KR (1) KR20140033942A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110912058A (en) * 2019-12-06 2020-03-24 中国电力工程顾问集团西南电力设计院有限公司 Wind deflection prevention semi-V-shaped suspension string
CN113161960A (en) * 2021-05-14 2021-07-23 国网河北省电力有限公司巨鹿县供电分公司 Compact suspension clamp for power supply line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110912058A (en) * 2019-12-06 2020-03-24 中国电力工程顾问集团西南电力设计院有限公司 Wind deflection prevention semi-V-shaped suspension string
CN110912058B (en) * 2019-12-06 2024-04-26 中国电力工程顾问集团西南电力设计院有限公司 Semi-V-shaped suspension string for preventing windage yaw
CN113161960A (en) * 2021-05-14 2021-07-23 国网河北省电力有限公司巨鹿县供电分公司 Compact suspension clamp for power supply line

Similar Documents

Publication Publication Date Title
KR20190000870U (en) Cable holder
KR101236132B1 (en) Fixing tool of lightning arrester for a power-transmission line
CN105977890A (en) Aperture-adjustable suspension wire clamp
KR101600293B1 (en) Insulator for overhead electric power distribution line
KR101619905B1 (en) Zig for insulator change apparatus
KR101537085B1 (en) Bracket connecting tool of lightning arrester for a power-transmission line
KR100519935B1 (en) Light weight buffer metal of electric pole for supply of electric power
KR20140033942A (en) Yoke of suspending insulator for supporting 3 electric wires
KR100796566B1 (en) Light weight buffer metal of electric pole for supply of electric power
US9502160B2 (en) Corona-free cap assembly
KR101636554B1 (en) Insulator for supporting aerial power distribution line
KR100843058B1 (en) High Voltage Cable Supporter
JP5794902B2 (en) Construction unit around the tower and construction method
KR102150504B1 (en) Cable Fixing Apparatus of Electric Pole for Power Transmission
KR101413169B1 (en) Distribtuing Board Supporting Steel Bar
KR102266058B1 (en) Cable direction variable apparatus for distribution pole
KR101753150B1 (en) Power distribution line improved stability of power distribution
CN102354641A (en) Fuse
KR100840945B1 (en) Upper part support of electric pole
AU2015249876B2 (en) Temporary transfer bus
KR102243314B1 (en) Apparatus for fixing cable
KR20180134666A (en) Divice for minimizing electric wire tension of bundle wire and method shifting construction using the same
KR101292645B1 (en) Sb-damper hold
JP2017046554A (en) V suspension device of jumper wire and method for forming jumper wire
CN203799765U (en) Horizontally-distributed triple-arrangement insulator string for 500kV line aluminum alloy wire

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination