Leakage current detection breaker with fire-proof shield

Leakage current detection breaker with fire-proof shield

  • CN 1,988,099 B
  • Filed: 12/23/2005
  • Issued: 05/05/2010
  • Est. Priority Date: 12/23/2005
  • Status: Active Grant
First Claim
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1. leakage current detection breaker with the fire-proof shield line comprises:

  • A detection of electrical leakage unit, it comprises;

    an induction coil and a tripping mechanism, pass a phase line and a center line in the described induction coil, when the electric leakage accident occurring, described induction coil detects the unsymmetrical current by described phase line and center line, make the tripping coil energising of described tripping mechanism, disconnect the contact of moving/fixed contact in the tripping mechanism thus;

    It is characterized in that;

    Described leakage current detection breaker also comprises;

    A fire prevention unit, comprise two rectifier diodes, wherein, one utmost point of a rectifier diode connects the phase line of electrical network, the end of the same name of another rectifier diode connects the center line of electrical network, a voltage drop element that is connected in series with described two rectifier diodes and the fire prevention link of drawing from described voltage drop element respectively;

    , a fire-proof shield line, the phase line heart yearn of this fire-proof shield line and center line heart yearn are connected the phase line and the middle line output terminal of leakage current detection breaker respectively, and the phase line heart yearn of described fire-proof shield line and center line heart yearn are surrounded by a copper litz wire, and an end of this copper litz wire connects the fire prevention link of described fire prevention unit.

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