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Contact spring arrangement for a relay for conducting and switching high currents

  • US 5,583,471 A
  • Filed: 05/09/1995
  • Issued: 12/10/1996
  • Est. Priority Date: 05/15/1992
  • Status: Expired due to Fees
First Claim
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1. A contact spring arrangement for a relay for conducting and switching high currents comprising:

  • at least one elongated contact spring which carries a first contact piece and co-operates with a fixed counter-contact element carrying a second contact piece,at least one rigid connecting leg for the contact spring, the at least one rigid connecting leg extending approximately parallel to the contact spring while forming a spring gap on a side opposite the first contact piece and the at least one rigid connecting leg conducting a switching current in a direction opposite to the contact spring,the spring gap extending at least approximately over an entire length of the contact spring from a mounting point of the contact spring to the first contact piece, and a ratio of length to spacing in the spring gap approximately satisfies the following condition when the first and second contact pieces are closed;

    ##EQU8## where L=length of the spring gapD=average spacing in the spring gapμ

    o =magnetic field constant=1.256·

    106 [Vs/Am]HS =limiting heating intensity of current-carrying capacity of contact material ##EQU9## of the first and second contact pieces.

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