Is your generator fit for cyclic duty?
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Figure 14. Borescope image of rotor bore indication -
Figure 10. The original, cracked, main lead J-strap is shown in the lower... -
Figure 13. Low cycle fatigue crack in rotor slot wedge. These wedges support... -
Figure 9. Fatigue cracking found in J-strap lead bend, close to braze... -
Figure 3. Flexible pole crossover in the shape of an omega (O) -
Figure 4. Omega shaped pole-to-pole connector, oriented axially -
Figure 11. Alternating compressive forces can initiate cracks in rotor tooth... -
Figure 5. Borescope inspection image showing that even flexible pole-to-pole... -
Figure 6. Terminal stud arrangement with both a stiff radial lead component... -
Figure 7. J-strap design consisting of a thick piece of copper (single layer)... -
Figures 8a. Terminal stud failures in the “flexible,” laminated, copper section -
Figures 8b. Terminal stud failures in the “flexible,” laminated, copper section -
Figure 12. Fluorescent penetrant test shows rotor tooth top crack -
Figure 1. Stiff, T-shaped, pole-to-pole crossover with crack -
Figure 2. Stiff, single-strap pole-to- pole crossover – open circuit failure