| 摘要 |
<p>PURPOSE:To obtain a bushing provided with a current transformer without necessiating a cylinder for fixing the current transformer, by building an optical magnetic field sensor in a bushing. CONSTITUTION:An optical magnetic field sensor 31 is arranged in a magnetic path generated by a current flowing in the conductor of a bushing 1. Said optical magnetic field sensor 31 is built in the bushing 1. When light is supplied to the sensor 31 from a signal processing equipment 33 through an optical fiber 32a, the light is modulated by the sensor 31 so as to be proportional to the magnetic field generated by the current flowing in the bushing 1. Said modulated light is inputted in the signal processing equipment 33 through the optical fiber 32b, and subjected to signal processing, thereby measuring the current flowing in the bushing 1.</p> |
