Life-stopping intelligent inspection and inspector for leakage protector

Life-stopping intelligent inspection and inspector for leakage protector

  • CN 1,328,588 C
  • Filed: 12/27/2005
  • Issued: 07/25/2007
  • Est. Priority Date: 12/27/2005
  • Status: Active Grant
First Claim
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1. earth leakage protective device end-of-life intelligent detection equipment comprises:

  • A ground short circuit fault simulation unit produces the analogue ground fault in the negative half period in each cycle of grid alternating current;

    An earth leakage protective device characteristic generation unit, it comprises;

    characteristic signals generative circuit, one be subjected to switching device that detection of electrical leakage partly controls and with described switching device capacitor connected in series, inductor, described inductor is mouthful coil that takes off of the described part of threading off;

    When producing the analogue ground fault in ground short circuit fault simulation unit, described electric-leakage detection circuit and dropout part are just often, described switching device conducting, obtain resonance signal and form resonant tank, described capacitor produces negative pressure, if exist the then described switching device of fault to end, then can not produce the certain negative voltage signal;

    Described characteristic signals generative circuit extracts the signal that reflects described electric-leakage detection circuit and/or dropout part characteristic from described resonant tank;

    A life-span stop detection control module;

    regularly reception and analysis and judgement determine whether there is fault in the electric-leakage detection circuit and/or the part of threading off thus from the described electric-leakage detection circuit of reflection of described earth leakage protective device characteristic generation unit output and/or the signal of dropout part characteristic.

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