Line state detecting apparatus and transmitting apparatus and receiving apparatus of balanced transmission system
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United States of America Patent
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-
Mar 20, 2012
Grant Date -
Oct 20, 2005
app pub date -
Apr 14, 2005
filing date -
Apr 16, 2004
priority date (Note) -
In Force
status (Latency Note)
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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.
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