Sakurai Yasuhisa

TL;DR: In this article, the optical current sensors having opto-magnetic elements and optoelectric field elements on respective conductors of the transmission line were used to detect a fault current and fault voltage on the basis of the Faraday's effect and Pockel's effect.

TL;DR: In this article, a system for transmitting an electrical power supply by means of an over-head power transmission line supported by power transmission towers, a fault such as a short-circuit fault and a ground fault is detected by providing optical current sensors (1) having opto-magnetic elements (3) and optoelectric field elements (20) on respective conductors of the transmission line to detect a fault current and fault voltage on the basis of the Faraday's effect and Pockel's effect.

TL;DR: In this paper, a system for detecting a fault occurred within a substation and judging a location of the fault including optical current sensors each having a Faraday element arranged on a top of an insulator post of a bus disconnecting switch, a magnetic core arranged to surround a terminal plate of the disconnecting switches to generate a magnetic field corresponding to a current passing through the terminal plate, a laser diode for emitting a laser light beam, an optical fiber for guiding the laser beam to the Faraday elements, a photodiode, and an optical fibre for transmitting the laser

TL;DR: In this paper, a system for detecting a fault occurred within a substation and judging a location of the fault including optical current sensors each having a Faraday element arranged on a top of an insulator post of a bus disconnecting switch, a magnetic core arranged to surround a terminal plate of the disconnecting switches to generate a magnetic field corresponding to a current passing through the terminal plate, a laser diode for emitting a laser light beam, an optical fiber for guiding the laser beam to the Faraday elements, a photodiode, and an optical fibre for transmitting the laser

TL;DR: In this paper, an accident sound source point standardizing apparatus is proposed to provide an accident point standardization apparatus which can accurately standardize an accident points in a point manner even if weather conditions are wrong.