Recent content by Jolek

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  1. J

    3AO1 and 3AO2 Thermocouple

    These are 3rd Stage Thermocouples, located on the left (3AO1) and right (3AO2) side downstream. There names minted on turbine body near the insertion holes.
  2. J

    9FA GT Exhaust Thermocouple Heads Breaking

    You must fasten ALL connections on TC routs so TC will not tremble.
  3. J

    Mixed Fuel Mode Operation

    Thank you, CSA! Those small grammar mistakes don't bother me at all. Myself, as English is not my first (and not a second, and not a third) language, surely making such terrible mistakes that I'm really glad someone can get to the point of a problem I'm trying to share and describe :)...
  4. J

    Mixed Fuel Mode Operation

    Thank you for your reply, CSA. "I&T" is a typo - I meant I&C (Instrument and Control Maintenance). We've considered changing check valves with pneumatic valves but this solution was dropped exactly because of reasons you've mentioned - cost, additional hardware in already "clogged" area in...
  5. J

    Mixed Fuel Mode Operation

    Hello, We have several Frame 9E units. Sometimes we're tripping at Gas-to-Liquid changeover, which we perform once per week or two. Usually, the problem is fuel pipes and other volumes not completely filled with liquid fuel. By slowing rate of changeover from 30 sec to 5-10 times more...
  6. J

    Wheelspace Thermocouple Exact Location

    First number is Stage number. Last number 1 is left turbine side downstream, 2 is right turbine side downstream.
  7. J

    GE Speed Control Loop

    Hello, How Droop Control handles Summer/Winter output margin? For instance, we have about 20 MW difference between hot and cold seasons. That means Base Load may change a lot and there are the same 4% for Droop SP Regulation.
  8. J

    GE Speed Control Loop

    CSA, Thanks for Your time writing this answer! As always, pretty sophisticated process explained in very simple way! So helpful!
  9. J

    Fr9E Exhaust Temperature Controlling Curves

    CSA, Referring to those nice graphs you wrote "Compressor pressure (ratio or discharge) increases going from right to left". Is it so?
  10. J

    MarkV Control System

    Hello All, In the past we've been putting AVERAGE voltage values for 0% and 100%, as mentioned in this thread. But in several last years we are using MEDIAN values, as written in Maintenance Manual GEH-5980E. To be honest, can't tell our calibrations are better or worse now. Jolek
  11. J

    MarkV Timers and Counters Inaccurate

    Hi, Sometimes during a "Hardboot" - simultaneous power off of all controllers - counters or/and timers lose there MSW or LSW (Most/Least Significant Word) set. And you get different reading. Therefore its always advisable to do an upload (EEPROM UP) to TOTD first. If you have SET_CNTR.exe...
  12. J

    MKV <P> Output Logic Forcing

    Hello, Need to create a Push Button for a signal that comes out of Protection Module of MK-V ( L20GF2X , Pneumatic Gas Stop Valve ). Usually, we force it from the Logic Forcing Display, and we have to force L4_XTP in advance to make it possible. I want to create a Push Button on the screen...
  13. J

    Failing MKV Controllers

    Two, <R> and <S>, controllers of MKV system failed simultaneously at base load. At SOE first alarm was low hydraulic oil pressure, all standby and DC motors started.Trend showed 2/3 TTXD's were down for 1 minute. No additional process alarms prior to the trip. In diagnostic alarms only "power...
  14. J

    Liquid Fuel Bypass Valve Oscillation

    Hi, In order to keep the good tradition of "closing a thread" by a poster who opened it, and, at the same time to thank everyone who shared his knowledge and experience with me: As soon as we received and mounted a correct type of MOOG valve for LCV, we run a turbine successfully up to...
  15. J

    Liquid Fuel Bypass Valve Oscillation

    First of all, I want to thank ALL of you busy guys for spending time and thinking trying to help - its not obvious at all and an exciting experience - to fill you're not a lonely warrior "fighting" a machine, but you have allies from very distant parts of this planet! :) Now to the subject...
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