1. When the steam turbine rotating speed rises to 3360r/min, and the emergency governor does not act.
2. When the steam turbine unit are strongly vibrated, and the inside of it has abnormal noise of metal friction noise and crashing noise.
3. When water impact happens in the steam turbine.
4. When the power generator smokes or fires.
5. When the main steam pipeline is broken severely.
6. When the condenser vacuum decreases rapidly to make the rear cylinder exhaust steam valves act.
7. When the axial displacement exceeds 1.00mm.
8. When the oil system is on fire and can not be extinguished.
9. When any bearing is not oiled or the scavenge oil temperature rises rapidly.
10. When the oil scavenge temperature rises rapidly and exceeds 75℃, and the bearing bush temperature exceeds 75℃ or the bearing inside smokes.
11. When the lubrication oil pressure decreases to 0.02MPa.