Identifying one of a plurality of wires of a power transmission cable
First Claim
1. A method for identifying one of a plurality of neutral wires of a power transmission cable, wherein said plurality of wires are connected together at a first end of said transmission cable and at a second end of said transmission cable, said method comprising:
- applying a signal to a selected neutral wire, at a first point on said power transmission cable proximate to said first end;
sensing a relative magnitude of said signal on each of said plurality of neutral wires at a second point on said power transmission cable proximate to said second end; and
identifying said selected neutral wire from said relative magnitudes.
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Abstract
There is provided a method for identifying one of a plurality of neutral wires of a power transmission cable. The method comprises (a) applying a signal to a selected neutral wire, at a first point on the power transmission cable, (b) sensing a relative magnitude of the signal on each of the plurality of neutral wires at a second point on the power transmission cable that is remote from the first point, and (c) identifying the selected neutral wire from the relative magnitudes. There is also provided a system for identifying one of a plurality of neutral wires of a power transmission cable.
159 Citations
7 Claims
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1. A method for identifying one of a plurality of neutral wires of a power transmission cable, wherein said plurality of wires are connected together at a first end of said transmission cable and at a second end of said transmission cable, said method comprising:
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applying a signal to a selected neutral wire, at a first point on said power transmission cable proximate to said first end;
sensing a relative magnitude of said signal on each of said plurality of neutral wires at a second point on said power transmission cable proximate to said second end; and
identifying said selected neutral wire from said relative magnitudes. - View Dependent Claims (2, 3, 4)
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5. A system for identifying one of a plurality of neutral wires of a power transmission cable, wherein said plurality of wires are connected together at a first end of said transmission cable and at a second end of said transmission cable, said system comprising:
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a receiver for sensing a signal from a selected neutral wire of said power transmission cable; and
an indicator of a magnitude of said signal, wherein said signal is applied to said selected wire at a first point on said power transmission cable proximate to said first end, and said receiver senses said signal at a second point on said power transmission cable proximate to said second end. - View Dependent Claims (6, 7)
a ferrite toroid having a radial slot through which said selected neutral wire is routed; and
a winding that is wound around a portion of said ferrite toroid and connected to an input of said receiver, wherein said signal is inductively coupled from said selected neutral wire via said ferrite toroid.
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7. The system of claim 5, further comprising an inductive coupler through which said signal is applied to said selected neutral wire at said first point.
Specification