Line state detecting apparatus and transmitting apparatus and receiving apparatus of balanced transmission system
US8139759B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2005 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Aug 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5491
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A line state detecting apparatus provided in a balanced transmission system includes, in transmission lines comprising a pair of conductors W1, W2 connected to a transmitting portion 13, current transformers T11, T12 primary sides of which are inserted to respectives thereof in series therewith and secondary sides of which are connected in series to cancel currents or voltages of the two transformer by each other, and a detecting portion 11 for detecting currents or voltages on secondary sides of the current transformers T11, T12. By an output of the detecting portion 11, a difference of currents or voltages of the conductors W1, W2 of the transmission lines is provided and an unbalance component between the conductors W1, W2 is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.