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Self-contained branch circuit monitor

  • US 9,964,567 B2
  • Filed: 10/09/2013
  • Issued: 05/08/2018
  • Est. Priority Date: 10/09/2013
  • Status: Active Grant
First Claim
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1. A self-contained branch circuit monitor in a load center, comprising:

  • a sensor coil of wire wound as a toroidal coil about a toroidal core, the toroidal core having a branch circuit wire in the load center threaded through the toroidal core'"'"'s center;

    a flexible printed circuit board wrapped around the toroidal coil'"'"'s outside circumference; and

    a monitoring circuit formed on the flexible printed circuit board, the monitoring circuit electrically connected to leads from the sensor coil, the monitoring circuit'"'"'s operation being powered by current induced in the sensor coil from current in the branch circuit wire in the load center, the monitoring circuit being configured to use the operating power to sample the current induced in the sensor coil as a measure of the current in the branch circuit wire and to transmit signals representing a value of the measured current in the branch circuit wire to a radio relay receiver inside the load center, for forwarding to a network.

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