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Microprocessor detection of transient voltage and abnormal line voltage

  • US 6,160,692 A
  • Filed: 04/06/1999
  • Issued: 12/12/2000
  • Est. Priority Date: 04/06/1999
  • Status: Expired due to Fees
First Claim
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1. Method of protecting a metal oxide varistor (MOV) from damage comprising the steps of:

  • a) placing said MOV in series with a solenoid operated switch having a first position to conduct current through said MOV to an electrical load and a second position to prevent the conducting of current through said MOV to said electrical load;

    b) providing a source of voltage connected to said solenoid operated switch;

    c) comparing a waveform of said source of voltage to a stored value of a perfect voltage waveform; and

    d) operating said solenoid operated switch to said second position if the waveform of said source of voltage exceeds a predetermined limit.

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