Temperature High Spread


Thread Starter


Hi everyone,

I'm facing high spread temperature trip in HITACHI H-25 gas turbine at startup (3000-3500 rmp).

All conditions seems normal such as T/Cs and GCVs. There was a fluctuation in spread at 10 MW load. We've checked all nozzles and calibrated all GCVs. But after firing there is abnormal increase in FFD, and finally it trips in around 3000 rmp in acceleration mode.

I'll appreciate it if anyone could help.