Detection and location of current leakage paths and detection of oscillations
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United States of America Patent
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Jul 17, 2001
Grant Date -
N/A
app pub date -
Feb 9, 1998
filing date -
Aug 9, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for detecting and locating electric current leakage paths along the length of an electrically conducting elongate member. The apparatus has a variable supply device and a meter device for monitoring the impedance of the member (9, 11), the supply device being operable to drive current in opposite directions along the member, so that a movable node can be established, the node being where the net change in potential between the member and its surroundings is substantially zero. When the apparatus is in use, the position of the node is varied by varying the current driven along the member and the resultant impedance is monitored by the monitoring meter device, whereby the position of the node at which there is a local minimum in the impedance indicates the position of a current leakage path.
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