Input circuit for current transformer
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United States of America Patent
Stats
-
Mar 7, 2017
Grant Date -
Aug 6, 2015
app pub date -
Jan 22, 2015
filing date -
Jan 23, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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