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Failed fuse detector and detecting method for rotating electrical equipment

  • US 4,635,045 A
  • Filed: 12/22/1980
  • Issued: 01/06/1987
  • Est. Priority Date: 12/22/1980
  • Status: Expired due to Term
First Claim
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1. A brushless exciter with a failed fuse detector, comprising:

  • a rotating member of said brushless exciter;

    a plurality of diodes fixed to said rotating member and arranged in a manner which rectifies alternating current and produces a direct current field for excitation of a turbine generator;

    a plurality of fuses fixed to said rotating member with each of said fuses connected in series with one of said diodes;

    a plurality of current transformers fixed to said rotating member and disposed individually about each of said fuses;

    a plurality of light emitting diodes fixed to said rotating member and individually connected in series with the secondary winding of each of said current transformers;

    a plurality of stationary photodetectors disposed about said rotating member proximate the circular path of said light emitting diodes described during rotation of said rotating member; and

    means for synchronizing the use of the photodetectors with the rotation of the rotating member to enable the selective determination of the conducting status of each of said fuses.

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