Branching unit for underwater telecommunications systems
US5841205A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1995 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Mar 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/808
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A branching unit for an underwater communications system is arranged so as to provide remote hot switching for electrical power. The unit has three terminations (1, 2, 3) each for a different one of three line cables and one or more power demand circuits (20) requiring an electrical power feed from the line cables. A first switch is actuable to complete a current path between an appropriate pair of the three terminations via one or more of the power demand circuits depending upon relative line voltage. A second switch is actuable after actuation of the first switch depending upon current supplied to the power demand circuit(s) rising above that which occurs upon action of the first switch. The second switch completes a circuit between the non-paired termination and a fourth termination for a sea-earth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.