| 摘要 |
<p>PURPOSE:To prevent not only the shift of an optical axis but also the effect of the electromagnetic force acting on a conductor or the operating vibration of a breaker, by elastically supporting a light emitting-receiving part mount member and the structure on the side of a tank through an elastic member. CONSTITUTION:A case 19 having an optical magnetic field sensor 16 fixed thereto and a plate 22 having a light emitting-receiving part 25 fixed thereto are fixed to and supported by an insulating cylinder 21 and, further, the plate 22 is elastically supported by a supporting container 27 through rubbers 39, 40 being elastic members. Therefore, even if an excessive electromagnetic force caused by the flow of an accident current through a conductor or the operating vibration of a breaker acts to vibrate the current transformer unit 41, the optical magnetic field sensor 16 and the light transmitting-receiving part 25 integrally vibrate since they are strongly bonded to the insulating cylinder 21 having high rigidity. As a result, no relative dispalacement occurs between the sensor 16 and the part 25, so that no shift of the optical axis is generated.</p> |
