INPUT CIRCUIT FOR CURRENT TRANSFORMER
First Claim
1. A transformer for monitoring current in a power cable comprising:
- (a) said transformer magnetically linked with said power cable connected to an electrical device, said transformer producing a changing transformer signal in response to the presence of a changing current within said power cable;
(b) an input circuit located proximate to said transformer and having an output terminal and being electrically connected to said transformer so as to receive said changing transformer signal, said input circuit producing, in response to receiving said changing transformer signal, one of a first signal representative of said changing current, and a first circuit condition at said output terminal of said input circuit representative of said changing current in said power cable;
(c) wherein said input circuit includes a resistor set having an effective resistance that comprises a plurality of resistors, wherein at least one of said resistors is not electrically connected to the remaining said plurality of resistors.
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Accused Products
Abstract
A transformer for monitoring current in a power cable is magnetically linked with the power cable connected to the electrical device, where the transformer produces a changing transformer signal in response to the presence of a changing current within the power cable. An input circuit located proximate to the transformer and having an output terminal and being electrically connected to the transformer so as to receive the changing transformer signal. The input circuit produces, in response to receiving the changing transformer signal, one of a first signal representative of the changing current, and a first circuit condition at the output terminal of the input circuit representative of the changing current in the power cable. The input circuit includes an impedance set having an effective impedance that comprises a plurality of elements, wherein at least one of the elements is not electrically connected to the remaining the plurality of elements.
18 Citations
10 Claims
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1. A transformer for monitoring current in a power cable comprising:
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(a) said transformer magnetically linked with said power cable connected to an electrical device, said transformer producing a changing transformer signal in response to the presence of a changing current within said power cable; (b) an input circuit located proximate to said transformer and having an output terminal and being electrically connected to said transformer so as to receive said changing transformer signal, said input circuit producing, in response to receiving said changing transformer signal, one of a first signal representative of said changing current, and a first circuit condition at said output terminal of said input circuit representative of said changing current in said power cable; (c) wherein said input circuit includes a resistor set having an effective resistance that comprises a plurality of resistors, wherein at least one of said resistors is not electrically connected to the remaining said plurality of resistors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A transformer for monitoring current in a power cable comprising:
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(a) said transformer magnetically linked with said power cable connected to an electrical device, said transformer producing a changing transformer signal in response to the presence of a changing current within said power cable; (b) an input circuit located proximate to said transformer and having an output terminal and being electrically connected to said transformer so as to receive said changing transformer signal, said input circuit producing, in response to receiving said changing transformer signal, one of a first signal representative of said changing current, and a first circuit condition at said output terminal of said input circuit representative of said changing current in said power cable; (c) wherein said input circuit includes an impedance set having an effective impedance that comprises a plurality of elements, wherein at least one of said elements is not electrically connected to the remaining said plurality of elements.
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Specification