Question Set 55
Question No. 1
What maybe the possible causes for the safety trip to trip at normal speed?
Answer:
1. Excessive vibration.
2. Leakage in the pilot valve.
3. Deposition of dirt in the safety trip valve.
Question No. 2
What other parts of the steam turbine blades suffer from damage?
Answer:
1. Blade roots.
2. Shroud band.