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Electrical Connection Repair Sequence at QBBI A21R7

Step-by-step repair process to maintain electrical connections at QBBI A21R7. Includes inspection, de-brazing, reconnection, and insulation reinforcement. Detailed instructions for effective repair.

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Electrical Connection Repair Sequence at QBBI A21R7

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  1. Repair sequence @ QBBI A21R7 • Starting point • M3 sleeve removed upstream (connection side) to give access to the electrical connections of the main dipole bus bars and for endoscope examination • Sequence • Cut/remove the M3 bellow attached to the end cover of 3014 • Inspect again through the end cover nozzle with/without endoscope • De-braze the electrical connections (mould and electrical heaters) • Restore the sc cable terminals • Reinforce the insulation to ground of the lyra with a U-shaped gutter of about 100 mm (impregnated fiber glass) • Put in place the spider, new M3 bellow and M3 sleeve • Re-do the electrical connections using again a mould and electrical heaters. The connections have been made 10 mm shorter to prevent the lyra from touching again the spool support/bolt F. Savary - MARIC on December 20th, 2006

  2. Where was the problem? 3014Lyra compressed A cold mass in production at ASG F. Savary - MARIC on December 20th, 2006

  3. Improve access for inspection and repairPreparation for de-brazing F. Savary - MARIC on December 20th, 2006

  4. Preparation of the insulation gutter F. Savary - MARIC on December 20th, 2006

  5. Put in place the insulation gutter and re-do the electrical connection F. Savary - MARIC on December 20th, 2006

  6. Tooling for the electrical connection (270°C for about 5 min) F. Savary - MARIC on December 20th, 2006

  7. Electrical connection finished and insulated Many thanks to the participants: Max Duret, Jacques Fataz, André Jacquemod, Roberto Lopez, Willemjan Maan, Alain Poncet, Marc Pozzobon, Davide Tommasini, Stephane Triquet, Claude Urpin … and the others for their help/support F. Savary - MARIC on December 20th, 2006

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