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  1. M

    HMI cannot communicate with DCS

    Greetings to all, We have GE Frame 5 Gas Turbines, controlled by Mark V TMR control system under DOS. The hard disk of one of the HMIs failed and we had to replace it. After replacement, we lost the communication between HMI and DCS. The communication is done via modbus connection. We did few...
  2. M

    Constants Check in Mark V

    Thanks a lot for your feedback. I was generating 'as running' files, and one command was different (MS_XREF instead of SEQDOCMT), so I thought this command was different too.
  3. M

    Constants Check in Mark V

    Greetings to all, We have GE Frame 5 Gas Turbines run by Mark V (IDOS) control system. We would like to check if the running values of constants (RAM) are the same as CONST_Q.SRC. We used command "constchk", but it did not work. It gives "Bad command" message. It seems that the procedure was...
  4. M

    Replacing the Packing of Generator Bearing

    We already got the procedure. If anyone wants it, leave your email here.
  5. M

    Gas Turbine Trip without any alarm

    Maybe there is just miscommunication between the HMI and the control system, and you do not "see" the alarms. It should show an alarm when it trips when breaker is closed.
  6. M

    Geneartor not sychronizing Mark-V control system

    Thanks a lot CSA for the helpful answer. We had a similar case where the hydraulic pressure switch was giving wrong feedback; while everything in the circuit was ok. We stopped the turbine, replaced the switch, and then turbine started successfully and generator synced with the grid. I just want...
  7. M

    Minimum Load of Gas Turbine

    Guys, Thanks a lot for the useful information. Can you share the full GE recommendation here ? We have 3 Frame 5 GTs in our site and we will have a shutdown soon; therefore, the load will be 1-2 MWs. Is it ok to operate one turbine on that load, knowing that there is no connection between the...
  8. M

    Replacing the Packing of Generator Bearing

    Control Gent's, I hope this message finds you all well. We have replaced the packing of the Generator Bearing by a standard one supplied by OEM. We tried to start-up the turbine 3 times and it tripped due to high vibration on generator DE and NDE. It seems that the packing is tight or not...
  9. M

    Weld repair Generator cooling air duct

    Thanks a lot CSA for your support. Appreciate it.
  10. M

    Weld repair Generator cooling air duct

    Thanks a lot CSA for your support. Really appreciate it. Below are some images for the crack and the ducting assembly. I still don't understand the risk on the control system. The generator protection we use is electromechanical, not electronic. Do you mean the bearing thermocouples and stator...
  11. M

    Weld repair Generator cooling air duct

    Getn's, I hope this message finds you all well. We have 25MW Holec Generator driven by GE Frame 5. There is a crack in the inlet cooling air duct. We want to repair it by TIG weld. Is there any risk in welding without dismantling the ducts ? Thank you in advance.
  12. M

    Base Load Limit of Frame 5 Gas Turbine

    Dear CSA, Thank you very much for your reply. Here are the data you required: The turbine nameplate is: Type : PG 5371 (PA) Nominal power output : 19570 kW - base load, gas fuel (@ 45 C & 0.989 bar) Nominal speed : 5094 rpm TTKn_x control constants: TTK0_C -- Exhaust...
  13. M

    Oil Leak at Brush Generator - Non-exciter End

    Is the leak coming from the inner side of the bearing or the outter side ? Is it the labryinth or the packing ?
  14. M

    Base Load Limit of Frame 5 Gas Turbine

    Gent's, I hope this message finds you all well. We have GE Frame 5 gas turbines with Mark V control system. After major overhaul of one unit and during baseload test, the generator output reached: - 26.1 MW - 9.3 MVAR - 0.942 pf the turbine variables reached: - TTXM = 474.6 - CTIM = 18.4 - FSR...
  15. M

    Generator VAr vs PF control

    Thanks a lot CSA. Your reply is very informative and useful.
  16. M

    Mark V Custom Counter

    Thanks a lot CSA for the informative procedure. I will try applying this ASAP and I will post here how it went.
  17. M

    Mark V Custom Counter

    Thanks a lot CSA for your reply. Appreciate your assistance. The starting means we have is a detroit diesel engine. I was looking to accumulate the starting means running hours; but it would be better if we accumulated the time the unit is on ratchet as well. The file content is as...
  18. M

    Fire Detection System Control Modules Suppliers

    Greetings to all, We need a supplier for Hi-Safe Rack3 Fire detection system control cards/modules. Anyone can recommend and suggest why their recommendation would be a good choice? Thank You in Advance.
  19. M

    Mark V Custom Counter

    Greetings to all, We have GE Frame 5 Mark V gas turbines. We want to schedule our Preventive Maintenance Routines for Starting System components (Torque Converter, Ratchet, ...etc) based on running hours. Since it does not operate all time, we need to create a custom counter to count the...
  20. M

    High Voltage Motor Temperature Rise

    Greetings to all, A high voltage motor was sent for rewinding, and when it came back, its temperature increased by around 20 deg. It is cooled by an air-to-air heat exchanger and motor cooling fan (MCF) driven by motor shaft. Can someone help in identifying the possible causes of...
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