| 摘要 |
<p>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.</p> |
