Apparatus for detecting failure in power system
US5134362A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/0007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
At both ends parts of a specified section of a high tension line and close to it, a first Faraday device and a second Faraday device are disposed, and an output end of the first Faraday device is connected to the input end of the second Faraday device through a polarization plane retaining type optical fiber. A light having a linear-polarized polarization plane is inputted from a polarizer to the input end of the first Faraday device. The light output from the second Faraday device is led through an analyzer to a photoelectric device, whose output is processed by an electric circuit consisting of only one band-pass filter, only one DC filter, only one divider, and a judgment circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.