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Water-cooled stator coil end sealing process

  • US 5,875,539 A
  • Filed: 11/14/1996
  • Issued: 03/02/1999
  • Est. Priority Date: 11/14/1996
  • Status: Expired due to Term
First Claim
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1. A process for preventing leaks in water cooled stator coils having a plurality of hollow conductor strands each having a lead end, and wherein the lead ends of the conductor strands are joined to a header, comprising the steps of:

  • confirming that no leak path exists around the conductor strands of one of the stator coils where it passes through the header;

    providing a vacuum enclosure around a portion of said stator coil in proximity to the header;

    applying a vacuum to the portion;

    measuring the vacuum to confirm that the rate of vacuum decay is below a predetermined limit; and

    injecting a resin into voids in the portion.

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