Alternating current detector
First Claim
1. A method of sensing alternating current in a cable having at least a pair of longitudinal conductors, each of the pair carrying a current equal in absolute value to the other in mutually opposite directions, comprising disposing a generally flat flexible coil with its lateral plane adjacent said cable in a position whereby electromagnetic fields caused by said currents directly intersect the coil and induce current in the coil by wrapping the coil with its lateral plane around the cable, detecting the induced current in the coil;
- moving the coil to maximize the induced current in the coil by rotating the coil around the periphery of the cable, and then fixing the coil to the cable.
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Accused Products
Abstract
A method of sensing alternating current in a cable having at least a pair of longitudinal conductors each of the pair carrying a current equal or unequal in absolute value to the other in mutually opposite directions, is comprised of disposing a coil with its lateral plane adjacent the cable in a position whereby electromagnetic fields caused by the currents intersect primarily different portions of the coil and induce current in the coil, and detecting the induced current in the coil.
36 Citations
20 Claims
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1. A method of sensing alternating current in a cable having at least a pair of longitudinal conductors, each of the pair carrying a current equal in absolute value to the other in mutually opposite directions, comprising disposing a generally flat flexible coil with its lateral plane adjacent said cable in a position whereby electromagnetic fields caused by said currents directly intersect the coil and induce current in the coil by wrapping the coil with its lateral plane around the cable, detecting the induced current in the coil;
- moving the coil to maximize the induced current in the coil by rotating the coil around the periphery of the cable, and then fixing the coil to the cable.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 9. A current sensing system comprising a flexible flat coil having an air core, means for fixing the coil in the proximity of at least a pair of closely spaced conductors each of which can carry alternating current, the position of the coil relative to said conductors being located such that electromagnetic fields surrounding both the conductors resulting from said respective currents can directly induce current into the coil.
Specification