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Monitoring device with a switching mechanism

  • US 5,214,559 A
  • Filed: 04/02/1990
  • Issued: 05/25/1993
  • Est. Priority Date: 04/03/1989
  • Status: Expired due to Term
First Claim
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1. A monitoring system comprising:

  • a monitoring device comprising;

    a switching mechanism to open or close electric circuits to turn the circuits on or off;

    a current detecting device providing inputs to cause operation of said switching mechanism in case of overload;

    a processor and setpoint memories coupled to said current detecting device which compare and evaluate actual values, said processor and setpoint memories being capable of detecting and accruing additional operational error data and statistical operating data over a time of a least two on cycles, said processor and setpoint memories choosing maintenance instructions based on said operational error data and statistical operating data;

    a tripping state indicating device; and

    a run display to display said data; and

    a bus coupled to said processor and setpoint memories of said monitoring device via one or more serially operating interfaces, said bus providing two-way data transmission between said monitoring device and other separate devices coupled to said bus, wherein said monitoring device is capable of performing output operations and assigning said various output operations to a respective setpoint selection; and

    a plurality of input keys, such that desired operating parameters are capable of being entered into said monitoring system via input keys, said desired operating parameters capable of being displayed at said run display.

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