SGT-100 or Typhoon Turbine Temperature Control Scheme


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I am working with a customer who seems to have lost all information about their control system. the turbine is an EGT typhoon which is now a Siemens SGT-100. I have quite a bit of experience on TB 5000's and some on TB-1750 but none on the SGT-100.

So any information about the SGT-100 controls would be appreciated. Specially conformation that the engine operating temperature is used for control and how temp spreads and bad thermocouples are handled. Do they use operating temperature, exhaust minus inlet for control? How are spreads and bad thermocouples handled.

I have looked on line and find very little specific information.

Thank you