Boiler Trip Conditions
- Emergency P.B.
- Feed water tank level very low
- Drum level very low
- ID fan(s) speed very low
- ID fan(s) dampers in closed condition
- Instrument air pressure very low
- Main steam stop valve not open
- Draft at inlet to cyclone or (outlet of cyclone) < set value
- Draft at ID inlet < set value
- HP bypass valve not open within 2 s of turbine trip
- Over pressure relief damper not closed
- Combustor temperature (at any location) > set point
- Temperature at cyclone outlet > set point
- Cooling water flow (total) very low
- Main steam temperature very high
- RH steam temperature very high
