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Apparatus, system, and/or method for protection and control of an electrical device

  • US 8,300,372 B2
  • Filed: 04/04/2007
  • Issued: 10/30/2012
  • Est. Priority Date: 04/04/2006
  • Status: Active Grant
First Claim
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1. An apparatus for providing overload thermal protection and control of a motor or electrical device having a motor, comprising:

  • a current transformer provisioned for measuring power supply line current supplied to a motor or electrical device having a motor, with substantial accuracy over a wide current range; and

    a microprocessor configured for;

    receiving a current input signal corresponding to the power supply line current measured by the current transformer;

    receiving a voltage input signal corresponding to a voltage measured from the power supply line powering the motor or electrical device having a motor;

    identifying a classification of the motor or electrical device having a motor, and a corresponding overload thermal protection value, based, at least in part, on at least one of the received current input signal or the received voltage input signal; and

    implementing control logic to set a set point for operating the motor or electrical device having a motor consistent with the identified classification and corresponding overload thermal protection value.

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