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  1. I

    MARK V (P) Core

    Do you mean the manual? or additional document about the protection core?
  2. I

    Questions about Isochronous and Droop

    i will be so grateful If you allow me to contribute in this discussion and try to help. about your question, YES it will comeback automatically, and i will try to explain why. so once the machine is loaded 50% so the speed reference is 102% (50% load), and the actual speed is 100% because the...
  3. I

    Diagnostic alarms in Z VPRO

    Peace according to my humble experience, and as I am checking the TREG board drawing in the manual, I don't think that the problem is a 28V loss, because if so we should have P28Z alarm. Also you can check the K4Z relay directly in the terminal board (if it is hot or not) to verify if it is...
  4. I

    Exhaust Thermocouples Spread MS5001

    To answer your question about the trip. After examining all the pictures, your machine needs that a thermocouple exceeds the high temp spread limit (TTHT) to trip, because already we have: 1) the actual spread (TTXSP1 is higher than the allowable TTXSPL) + 2) the system detects that a Tc...
  5. I

    WorkstationST OPC DA Server

    Thank you for you response. Building on what you said and about EGD data, can i choose which EGD data that would show up on the OPC server? in other words, prevent some variables from being copied to OPC server!
  6. I

    WorkstationST OPC DA Server

    i would be so grateful if you could explain exactly how the OPC DA server performs when enabling it in the workstationST: - In the OPC DA server tab, does the "Client Driven variable" means the variable of the workstation which are held by the OPC? - does it copy directly the EGD data...
  7. I

    Convert a Mark V Component for Use in ControlST Applications

    Thank you very much indeed my friend, after just adding "T1:" everything worked like charm. I have another enquiry, as I am to be involving with this kind of installation in the near future. Can you please explain how the interface has been made between the upgraded HMI and the Communication...
  8. I

    Convert a Mark V Component for Use in ControlST Applications

    I managed to configure a Mark V controller into ToolboxST application using the Mark V feature in the WorkstationST component editor. Everything went okay, and i finished the operation by adding the Mark V maintenance tools( logic forcing, dynamic rungs display...etc) using the "REBUILD START...
  9. I

    Gas Turbine Free Governor Mode of Operation

    Yes, exactly what i wanted to confirm. thank you very much indeed Mr CSA PS: when i said load setpoint, i meant the energy flow-rate into the prime mover.
  10. I

    Gas Turbine Free Governor Mode of Operation

    Mr CSA, what is the difference between isochronous mode and this special preselected mode if both sense grid frequency fluctuaion and change the load setpoint upon that?
  11. I

    IGV angle and pulsation protection control

    CSA first of all i'm sorry fo my delayed reply. Second so as an other protection to the axial compressor from stall, when the turbine below the operation speed are the bleed valves! (10th stage bypass to exhaust) THEY MUST BE OPEN. And during normal operation the valves are automatically...
  12. I

    IGV Servo Positions Explanation

    >Dear CSA, Just want to understand is there any new approach here with the terms slow close and fast close or not? as you have mentioned with a positive current sent to the servo valve the hydraulic actuator would travel to close position till the SP = PV so the null bias would be the...
  13. I

    IGV angle and pulsation protection control

    Thank you very much indeed Mr CSA, If you have any other information that you can share with us i will be so grateful.
  14. I

    IGV angle and pulsation protection control

    After studying the CSRGVPS algorithm of a 5002B heavy duty gas turbine, I found that the inlet guide vanes are automatically positioned closed during a start-up and a shutdown sequence to avoid gas turbine compressor pulsation or combustion pulsation. I found also to protect the axial compressor...
  15. I

    Zeroed Starts Counters and Total Fired Time Mark V

    just want to know that the counters went 0 or #### in the HMI? those counters are features of the eeprom, so they are counted there and send to HMI directly, go to the workbench of your project > point > and search for ACCUM_FIRED and ACCUM_HOURS points (those two point that you are...
  16. I

    Frame 6B Trips on Exhaust Overtemperature During Start Up at 33% TNH

    Peace would you check the turbine inlet air filter pressure (DP transmiter). because if the filter house is full of dirt, the compressor inlet wont have enough air to operate the turbine with and as a consequence of that the exhaust temperature would rise over the trip value at startup...
  17. I

    Servo Valve Current

    CSA This is what i was doubting my self and i wanted to confirm it. thank you very much indeed for your help peace
  18. I

    Servo Valve Current

    CSA as i'm checking the regulator diagram in 6195D GE document, i can see that the output of the regulator (type 43) is as follows: "(REF-FDBK)*gain+bias current" here i can't understand where the minus sign take place exactly. because as you mentioned, if we have a negative output mean...
  19. I

    Mark VI SRV/GCV Pressure Transmitter Trouble

    Peace i totally agree with all what you said CSA. thanks you very much and for that i want to ask cheedee about the difference between the old and new transmitters (two three or four wire transmitters)? My regards
  20. I

    Mark VI SRV/GCV Pressure Transmitter Trouble

    peace i didnt understand when you said that the intervalve pressure corresponds in operation with srv/gcv? and from the other hand are the transmitters giving the same wrong indication? what i can tell you to do is to confirm the calibration of the 3 transmitters(zero and span)and make...
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