JPH09200930A - Support for current sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an overhead earth-wire attached in the position where a current transformer is attached from causing fatigue breakage by supporting a current sensor arranged in the vicinity of a steel tower, with a support arm projected from the steel tower so that the load of the current sensor may not be added to a cable. SOLUTION: As a current sensor 3, a current transformer is used usually, and an overhead earth-wire 2 pierces the center. This current sensor 3 is supported by a support arm 4 projected from the steel tower 1. That is, the support arm 4 is provided under the overhead earth-wire 2, and this support arm 4 is is composed of a horizontal arm 4a extended in horizontal direction and a vertical arm 4b extended upright in vertical direction to the horizontal direction 4a, and a current sensor 3 is attached to the tip of this vertical arm 4b. When supporting the current sensor 3 with the support arm 4, it is supported so that the load of the current sensor 3 may not add to the overhead earthwire 2, receiving the load of the current sensor 3 with the support arm 4. Hereby, even if, for example, vibration such as wind vibration, etc., occurs in the overhead earth-wire, the current sensor mounting position does not becomes the node of vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support portion of a current sensor.

[0002]

2. Description of the Related Art In order to locate a faulty section of an overhead power line, a current sensor is attached to the overhead ground line, and when a fault occurs in the overhead power line, a fault current flowing through the overhead ground line can be detected by the current sensor. It is being appreciated. A current transformer (CT) is generally used as the current sensor, and this current transformer is housed in a box 10 and attached to the overhead ground wire 2 as shown in FIG. That is, the overhead ground wire gripping portions 12 are provided on both sides of the box 10 in which the current transformer is housed. The overhead ground wire gripping portion 12 grips the overhead ground wire 2 and tightens the fixing bolts 13. Attached to the overhead ground wire 2.

[0003]

As described above, when the current transformer is housed in the box body 10 and the box body 10 is attached to the overhead ground wire 2, the load of the current transformer and the box body 10 is increased. When a vibration such as a breeze is generated on the aerial ground wire 2 due to this, the position of the aerial ground wire gripping portion 12 of the box body 10 becomes a node of vibration, and the aerial ground wire gripping portion There was a problem that the overhead ground wire 2 located at 12 was repeatedly bent and fatigue fractured.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a support portion for a current sensor that does not cause fatigue breakage in an overhead ground wire or the like at a position where a current transformer is attached. The configuration is characterized in that the current sensor arranged near the steel tower is supported by the support arm projecting from the steel tower so that the load of the current sensor is not applied to the electric wire.

By supporting the current sensor with the support arm projecting from the steel tower so that the load of the current sensor is not applied to the electric wire, even if vibration such as breeze vibration occurs on the overhead ground wire, The position where the current sensor is attached does not become a vibration node. Therefore, the fatigue breakage of the overhead ground wire can be prevented without the overhead ground wire being repeatedly bent.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. In FIG. 1, 1 is a steel tower, 2 is an overhead ground wire,
3 is a current sensor and 4 is a supporting arm. A current transformer is generally used as the current sensor 3, and the overhead ground wire 2 penetrates through the central portion. The current sensor 3 is supported by a support arm 4 protruding from the steel tower 1. That is, the support arm 4 is provided below the overhead ground wire 2, and the support arm 4
Is composed of a horizontal arm 4a extending in the horizontal direction and a vertical arm 4b extending vertically to the horizontal arm 4a, and a current sensor 3 is attached to the tip of the vertical arm 4b.
When the current sensor 3 is supported by the support arm 4, the load of the current sensor 3 is received by the support arm 4, and the overhead ground wire 2 is supported so that the load of the current sensor 3 is not applied.

FIG. 2 shows a second embodiment of the present invention. The support portion of this current sensor differs from the above-described embodiment in that the support arm 4 is provided above the overhead ground wire 2. Since the support arm 4 is provided above the overhead ground wire 2 in this manner, the vertical arm 4b of the support arm 4 extends in the downward right-angle direction with respect to the horizontal arm 4a. Since the other points are the same as those of the above-described embodiment, the same reference numerals are given and the description thereof is omitted.

The support arm 4 in each of the above embodiments
Although it is made of a rigid body, an elastic body such as a coil spring or rubber may be incorporated in the vertical arm 4b. In this way, when the elastic body is incorporated in the vertical arm 4b, the overhead ground wire 2
When it vibrates greatly and collides with the current sensor 3, the current sensor 3 moves and the impact of the collision can be mitigated. Therefore, the damage to the current sensor 3 and the damage to the overhead ground wire 2 can be effectively prevented. In addition, the current sensor 3
In addition to the current transformer, a Faraday element, an air-core coil or the like can be used. Furthermore, it goes without saying that the current sensor 3 may be attached to the overhead power transmission line instead of the overhead ground wire 2.

3 to 5 show a state in which the support portion of the current sensor as described above is attached to the overhead ground line. The one shown in FIG. 3 is one line 1L and two lines 2L.
In both cases, a current sensor 3 is attached to each tower 1 and is supported by it. The one shown in FIG. 4 has one line 1L and two lines 2L for every other tower 1, and one line 1L and 2L.
Current sensor 3 so that the mounting position is different from line 2L
The one in which the current sensor 3 is attached and supported, and the one shown in FIG. 5 is one in which every three towers 1 are installed and the current sensor 3 is alternately attached and supported by one line 1L and two lines 2L.

From the viewpoint of the accuracy of locating the faulty section of the overhead power transmission line, the mounting state of each of the current sensors shown in FIGS. 3 to 5 is the most accurate, and FIG.
And finally that of FIG. How to mount the current sensor is determined in consideration of the target accuracy.

[0011]

As described above, in the support portion of the current sensor according to the present invention, the current sensor arranged near the steel tower is supported by the support arm projecting from the steel tower, and the load of the current sensor is applied to the electric wire. Since it is not provided, even if vibration such as breeze vibration occurs on the overhead ground wire or the like, the position where the current sensor is attached does not become a node of vibration. Therefore, the fatigue breakage of the overhead ground wire or the like can be prevented without the overhead ground wire or the like being repeatedly bent.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a support portion of a current sensor according to the present invention.

FIG. 2 is a front view showing another embodiment of the support portion of the current sensor according to the present invention.

FIG. 3 is a plan view showing an example of a mounting state of a support portion of a current sensor according to the present invention.

FIG. 4 is a plan view showing another example of a mounting state of the support portion of the current sensor according to the present invention.

FIG. 5 is a plan view showing another example of the mounting state of the support portion of the current sensor according to the present invention.

FIG. 6 is a front view showing an embodiment of a conventional current sensor support portion.

[Explanation of symbols]

 1 Steel Tower 2 Overhead Ground Wire 3 Current Sensor 4 Support Arm

Claims (1)

[Claims] 1. A support part of a current sensor, characterized in that a current sensor arranged near a steel tower is supported by a support arm projecting from the steel tower so that a load of the current sensor is not applied to an electric wire.