Power feed line switching circuit for submarine branching device and method of feeding power to submarine cable communication system
US5214312A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power feed line switching circuit for a submarine branching unit has first, second and third electrical paths connected in a Y-shaped connection, and first, second and third terminals connected respectively thereto. The power feed line switching circuit also has first, second and third relays each including a drive unit inserted in the first, second and third terminals and a switching unit for disconnecting the corresponding terminal and connecting the terminal to the ground, respectively. These relays are used to control the connections between the terminals and electrical paths, for establishing a one-end power feed line or a both-end power feed line to maintain power feed for repeaters and the submarine branching unit by the plurality of relays, even though a fault is caused in the optical marine cables for cable landing stations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.