JPH08265947A - Jumper for bundle conductor transmission line - Google Patents

Abstract

PURPOSE: To facilitate fixing of a jumper lead wire by locating the joint of a jumper rod and a jumper lead wire above the horizontal position of the jumper rod and locating the lowermost point of the jumper lead wire at the lowermost point of the jumper rod or above thereby suppressing generation of corona. CONSTITUTION: A jumper rod 7' is bent upward, on the opposite sides thereof, with an optimal radius of curvature toward the bundle conductor side and connected, at the end thereof, with a jumper lead wire 6' such that the joint is located above the horizontal position of the jumper rod 7'. The jumper lead wire 6' is substantially linear and does not sag downward. The jumper rod 7' is bent acutely, at the opposite ends thereof, with an optimal curvature so that the jumper rod 7' does not cause generation of corona. Formation of the jumper rod 7', especially bending thereof at the opposite ends, can be carried out previously and the fixing work thereof can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper device for a multiconductor power transmission line.

[0002]

2. Description of the Related Art Generally, in an overhead transmission line of 500 kilovolts or more, a multi-conductor system of four conductors or more is mainly used, and a suspension system is used for a jumper device of this multi-conductor transmission line. FIG. 2 shows a conventional example of a suspension type jumper device for a multi-conductor transmission line. In this conventional example, one side of the insulator string 2 is supported by the steel tower arm 1, and the yoke 3 to which the electric wire 4 is retained is connected to the tip of the insulator string 2.

The jumper rod 7, which is the main body of the jumper device, is attached to the yoke 3 by the hanging member 5,
It is in a suspended state below the insulator string 2. The multiconductor power transmission line 4 and the jumper rod 7 are connected by a jumper lead wire 6 having the same number of conductors as the multiconductor.

At present, the mainstream of the jumper device is a so-called prefabricated construction method in which a member manufactured in advance in a factory is used in order to facilitate the work of mounting on the spot.

[0005]

According to the above-mentioned conventional technique (FIG. 2), there are the following problems. When the jumper lead wire 6 is attached, downward bulges g occur on both sides of the jumper rod 7. Since this bulge g is a portion protruding from the jumper device, corona is easily generated from this portion. It is necessary to limit the bulge g due to the relationship of the insulation distance from other phases, and it takes time for molding at the time of mounting.

The present invention has been made in view of the above-mentioned problems of the prior art, and suppresses the generation of corona in a jumper device including a hanging type jumper rod and a jumper lead wire connected to the hanging type jumper rod, An object of the present invention is to provide a jumper device for a multiconductor power transmission line in which a jumper lead wire is easily attached, and there is a problem (objective) to be solved in that respect.

[0007]

SUMMARY OF THE INVENTION A jumper device for a multi-conductor transmission line provided by the present invention has a connection portion between a jumper rod and a jumper lead wire, which are suspended horizontally, located above a horizontal position of the jumper rod. , The lowest point of the jumper lead is the same as or higher than the lowest point of the jumper rod.

In a preferred embodiment, both sides of the jumper rod are pushed up to the side of the power transmission line, and the push-up ends form a connecting portion with the jumper lead wire, and the jumper lead wire is made substantially linear.

[0009]

According to the jumper device for a multiconductor power transmission line of the present invention, the connection portion between the horizontally suspended jumper rod and the jumper lead wire is always located above the horizontal position of the jumper rod, and the jumper lead wire is provided. Since the lowest point of the jumper rod is at the same level as or higher than the lowest point of the jumper rod, the downward projection of the jumper device is eliminated, and the corona generation due to the swelling of the jumper lead wire can be suppressed. is there.

The occurrence of corona is particularly severe due to rainfall. This is because the water drop has a large factor, and the downward bulge of the jumper lead wire is the largest in that the water drop is generated. By eliminating the downward bulge as described above, it becomes difficult to form water droplets that promote the generation of corona.

[0011]

1 shows an embodiment of a jumper device for a multiconductor power transmission line according to the present invention, in which 1 is a tower arm,
Reference numeral 2 is an insulator string, 3 is a yoke, 4 is a multi-conductor transmission line, 5 is a suspension member, 6'is a jumper lead wire, 7'is a horizontally suspended jumper rod, a is a jumper lead wire and a jumper rod. Is the connection part of. Since the same reference numerals as those in FIG. 2 are used for the same portions as those in FIG. 2, refer also to the above description regarding FIG.

In the present embodiment, both sides of the jumper rod 7'are bent at an optimum bending radius R so as to be pushed up to the multiconductor transmission line side, and at the pushing-up end, connection a with the jumper lead wire 6'is made. The connecting portion a is located above the horizontal position of the jumper rod 7 ', and the jumper lead wire 6'is made substantially linear so that the downward bulging phenomenon of the jumper lead wire 6'will not occur. It was done. This is because the optimum bending radius R on both sides of the jumper rod 7'is a gentle bending method so as not to form an acute angle so as not to form a cause of corona generation.

The forming of the jumper rod 7 ', in particular the bending of both sides, can be carried out in advance in the factory, and the jumper lead wire 6'can be made substantially linear and connected to the protruding end of the jumper rod 7'. Therefore, the work of attaching the jumper lead wire can be easily performed.

It should be noted that the above embodiment is a preferable example even if it gets tired, and the scope of claims of the present invention (claim 1).
Various modifications and applications are possible within the scope of the technical idea disclosed in.

[0015]

According to the jumper lead device for a multiconductor transmission line of the present invention as described above, since the protrusion due to the downward bulge of the jumper lead wire is not formed, the occurrence of corona can be suppressed. The jumper rod can be easily molded and the jumper lead wire can be easily attached, which shortens the installation time. The effect is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a jumper device for a multiconductor power transmission line according to the present invention.

FIG. 2 is an explanatory view showing an example of a conventional jumper device for a multiconductor power transmission line.

[Explanation of symbols]

 1 Steel Tower Arm 2 Insulator Chain 3 Yoke 4 Multi-conductor Transmission Line 5 Hanging Member 6'Jumper Lead Wire 7'Jumper Rod

Claims (2)

[Claims] 1. A jumper device having a structure in which a jumper rod is horizontally hung under an insulator string of a steel tower retaining portion, and the jumper rod and the multiconductor transmission line are connected by a jumper lead wire having the same number of conductors, For multi-conductor transmission lines, where the connection between the jumper rod and the jumper lead wire is located above the horizontal position of the jumper rod, and the lowest point of the jumper lead wire is the same as or above the lowest point of the jumper rod. Jumper device. 2. The jumper rod is pushed up to both sides toward the power transmission line, and the push-up ends are connected to the jumper lead wire to make the jumper lead wire substantially linear.
The jumper device for a multi-conductor power transmission line according to claim 1.