Vacuum bulb for an electrical protection apparatus, such as a switch or a circuit breaker

Vacuum bulb for an electrical protection apparatus, such as a switch or a circuit breaker

  • CN 101,208,763 A
  • Filed: 06/06/2006
  • Published: 06/25/2008
  • Est. Priority Date: 06/28/2005
  • Status: Active Application
First Claim
Patent Images

1. one kind is used for such as disconnect;

  • the vacuum tube of the electrical protective device of switch or circuit breaker;

    described vacuum tube comprises;

    by the shell that is roughly tubular of two end plate closes;

    two contacts of in this shell, extending vertically;

    in these contacts at least one;

    it is moving contact;

    being connected to operating mechanism and being slidably mounted on one to make closing of contact position that electric current connects and described contact in this place separation and bear between the position of the voltage between them; and

    at least one conductive shielding part that is provided with around this at least one contact;

    it is characterized in that;

    this vacuum tube comprises at least two shielding parts (8 to

         18);

    described shielding part comprises and is inserted in described two contacts (1;

         2) be called as intermediate potential shielding part (9 between;

    12;

         16) shielding part; and

    be inserted in described intermediate potential shielding part (9;

    12;

         16) and described contact (1;

         2) be called as shadow shield part (8 between one in;

    10;

    11;

    13;

    14;

         18) at least one shielding part;

    described shielding part is fixed on certain point of shell;

    be not electrically connected with one of described contact or another;

    select described intermediate potential shielding part (9;

    12;

         16) and described contact (1;

         2) distance between;

    make described contact (1;

    the electric field of edge

         2) is from described contact (1;

         2) point to described shadow shield part, or point to described contact according to the polarity of voltage from described shadow shield part on the contrary.

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