Combustion Monitoring:The primary function of the combustion monitor is to reduce the likelihood of extended damage to the gas turbine if the combustion system deteriorates. This function detects abnormal combustion temperature patterns reflected downstream in exhaust spreads. The function is enabled when the turbine is enabled with L4 above operating speed, 14HS. The turbulence during startup/shutdown prevents use of the algorithm to detect abnormal combustion. Combustion abnormalities can include ruptured transition pieces, loss of fuel or flame in a combustor, or other combustion malfunctions.In the event of combustion alarm, it is most likely that a condition exists within the turbine that, if left alone, could lead to serious combustor or turbine damage.The usefulness and reliability of the combustion monitor depends on the condition of the exhaust thermocouples. It is important that each of the thermocouples is in good working condition.The combustion monitor can indicate the following problems:Combustor Failed Liner (Cracked or burned) Failed Transition Piece (Cracked or burned) Collapsed Liner Hot crossfire tubesFuel System: Break in liquid and / or Gas fuel line Plugged or stuck check valve Liquid fuel in gas manifold Stuck flow divider Failed fuel pumpFuel Nozzle: Plugged fuel nozzle (Liquid of Gas) Unscrewed fuel nozzle Fuel Nozzle ErosionPressure Vessel Integrity: Cracked Combustor casing Damaged crossfire tube piping Cracked or blown sight port Leakage at flame detector or spark plugFirst Stage Nozzle: Burned out first stage nozzle Plugged first stage nozzleCombustion Monitor Temperature Spread:This algorithm (TTXSPV5 - Combustion Spread Monitor) uses the maximum CTDAWheelspace Over temperatureTemperature Control and protection