How to diagnose high shaft vibration and rotor unbalance on a GE Gen6 / Gen8 generator
A 1x vibration increase that tracks with load or temperature is consistent with thermal rotor bow or slow mass unbalance. Compare vibration vectors at multiple load points and contact the OEM if the vector changes.
~60 min6 steps
How to diagnose high stator winding temperature on a GE Gen6 / Gen8 generator
Elevated stator winding temperature with normal load usually means reduced cooling water flow or a blocked cooling passage. Check cooling water flow rate, inlet temperature, and compare RTD readings across all stator slots.
~60 min7 steps
How to detect and respond to a hydrogen gas leak on a GE Gen6 / Gen8 generator
Declining hydrogen purity or elevated makeup demand signals a leak. Check the shaft seal oil system first since shaft seals are the most common hydrogen leak path on large generators.
~120 min7 steps