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  1. J

    Wheelspace Thermocouple Exact Location

    First number is Stage number. Last number 1 is left turbine side downstream, 2 is right turbine side downstream.
  2. 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.
  3. 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!
  4. 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?
  5. 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
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. J

    Liquid Fuel Bypass Valve Oscillation

    Hello Control Guys! In our 9E / MKV machine when loading 20MW and up Liq.Bypass valve starts oscillate while control signal is stable. I looked over very useful threads about MOOG valves, Bypass valve check etc., but I still have a problem to solve at my site. In addition to the written...
  12. J

    High Spread While Burning Liquid Fuel

    Do you experience check valves stuck when not running on liquid fuel for some time and how do you deal with it? Do you also experience MOOG valves become ungovernable for the same reason?
  13. J

    9E Trip at Shutdown

    Hi all, After giving a STOP command turbine is when trying to transfer from PREMIX to LEAN-LEAN with FAILURE TO REIGNITE PRIMARY ZONE. It happens only at Shutdown sequence. at Startup and Premix Transfer we have no warnings/alarms. Gas fuel pressure/Air pressure/Igniters are OK. We have some...
  14. J

    MKV Controller Went Back to A3 State

    Thanks CSA, I was asked for an immediate (even temporary) solution,so I've excluded <S> controller from the voting to let operators have the machine Ready to start with two other controllers. I will check all the connectors , although I believe that the problem is the card itself,so I need to...
  15. J

    MKV Controller Went Back to A3 State

    Hello all! In our GE F9e TCS one of the MKV controllers went to A3 state. Reset from PD panel didn't help - the controller stays at -INIT- step. Manual says it may be 80186 processor not communicating. Several months ago i've changed DCC and LCC cards of this very controller. Any...
  16. J

    Clogged Pipes on 9F DLN1 Dual Fuel Units

    Hello, We have 9F DLN1 dual fuel units - 20+ years old. Mostly running on gas, but we have to exercise them on liquid fuel periodically. Many times liquid fuel pipes running from splitter found clogged with sludge and also a number of check valves always found stuck. Is there any...
  17. J

    Static/Dinamic servo calibration

    First i have to apologize for a mistake - its an SVO4 (liq.fuel splitter vlv), not an SVO3 (liq.fuel bypass vlv). > When did you first notice this differential? - After a Major Inspection which we've completed recently > Why is it perceived to be a problem? - We tripped because of...
  18. J

    Static/Dinamic servo calibration

    My SVO3 in TMR MKV GT has a constant feedback difference of 4-5% from a reference signal. Both LVDT's are pretty close at all channels but when trying to run Autocalib i get a message "Not reach 50% +sat. more then 5 sec". I was thinking about electronic Null Bias adjustment, but dropped the...
  19. J

    Periodics for Frame9 turbine

    Thanks, Bob! Got the file (taken as spam to the trash) - looks very helpful. Thanks again!
  20. J

    Periodics for Frame9 turbine

    > Send an Email address, I have a 9001E maintenance manual I can send you. [email protected] To Bob Johnston: For some reason I didn't receive the file. There are few guys hunting it also, so please Bob be so kind and send it to me again on the email above.
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