Intelligent detecting method and appliance for service stop of electricity leakage protector

Intelligent detecting method and appliance for service stop of electricity leakage protector

  • CN 100,349,345 C
  • Filed: 02/21/2006
  • Issued: 11/14/2007
  • Est. Priority Date: 02/21/2006
  • Status: Active Grant
First Claim
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1. an earth leakage protective device end-of-life intelligent detection equipment is used to detect earth leakage protective device and whether has fault, comprising:

  • An AC network signal Synchronization monitoring means extracts synchronous half-wave voltage signal, with the sampled signal as real-time detection from electrical network;

    A life-span stop detection control unit, according to described sampled signal from the input of AC network signal Synchronization monitoring means, produce and the output ground fault analog signal, and start subsequently the electric-leakage detection circuit of earth leakage protective device and the real-time detection of the part of threading off;

    An earth fault analogue unit, the described earth fault analog signal according to from the input of life-span stop detection control unit produces an analogue ground fault that makes earth leakage protective device ground connection;

    Wherein, when described earth fault analogue unit when the predetermined instant of alternating current negative half-cycle rising edge or trailing edge produces the analogue ground fault;

    described life-span stop detection control unit detects the electric-leakage detection circuit of earth leakage protective device and whether the part of threading off exists fault; and

    when detecting fault;

    send alarm signal by alarm unitWherein, described dropout part has a dropout thyristor, detection for the part of threading off, be to connect a diode by described dropout thyristor polyphone, diode anode connects the negative electrode of this thyristor, diode cathode ground connection, the fixed pressure drop that produces when wherein utilizing this diode forward conducting is carried out life-span stop detection to dropout thyristor and tripping coil.

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