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  • US 7,902,992 B2
  • Filed: 08/13/2008
  • Issued: 03/08/2011
  • Est. Priority Date: 09/10/2007
  • Status: Active Grant
First Claim
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1. A device for monitoring a power cable current, said device comprising:

  • (a) a primary transformer winding arranged to conduct said power cable current;

    (b) a secondary transformer winding coupled to said primary transformer winding and electrically interconnecting a first output terminal and a second output terminal, said power cable current inducing in said secondary winding an alternating secondary winding voltage;

    (c) a first burden electrically interconnecting said first output terminal and said second output terminal during a positive alternation of said secondary winding voltage; and

    (d) a second burden electrically interconnecting said second output terminal and said first output terminal during a negative alternation of said secondary winding voltage.

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