Recent content by Kwabena

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  1. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    Hello CSA, It has been a while. The problem was seemingly resolved when we discovered during a Hot Gas Path Inspection (HGPI) and Generator Major Inspection in 2023, that the generator coupling's alignment run-off readings were not GE's specifications. The same was also identified for the...
  2. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    The problem was seemingly resolved when we discovered during a Hot Gas Path Inspection (HGPI) and Generator Major Inspection in 2023, that the generator coupling's alignment run-off readings were not GE's specifications. The same was also identified for the accessory coupling. We therefore...
  3. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    The problem was seemingly resolved when we discovered during a Hot Gas Path Inspection (HGPI) and Generator Major Inspection in 2023, that the generator coupling's alignment run-off readings were not GE's specifications. The same was also identified for the accessory coupling. We therefore...
  4. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    CSA, I am very happy with the interest that you have in our problem. I believe that I haven't been clear in my earlier submissions, so I well endeavour to be very clear this time around. First of all, This unit has commissioned in 2009 and has been running very well with high availability and...
  5. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    Sorry for the late response. The problem with the starting motor's inability to break the turbine away reoccurred last Saturday and we were battling with it once again. This time around, the unit was not in water wash mode, but on turning gear. There was a momentarily power disruption, which...
  6. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    Thank you very much CSA and MIKEVI. I believe that I have to bring some clarity on the problem. The problem has been with us for about two years now. You see, we are able to start, crank, run and operate the gas turbine successfully from zero speed or turning gear speed of 120rpm without any...
  7. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    Thank you very much for your response. Our generator is a Brush Generator and it is air-cooled by the end fans and the air is water-cooled by four radiators. Yes, the generator has a bearing lift oil pump that lifts up the generator rotor due to its weight. Our investigations so far have proven...
  8. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    Sorry, I forgot to add that the unit is a GE Frame 9E gas turbine and the control system is Speedtronic Mark VI.
  9. K

    Starting Motor inability to break turbine away during a Compressor Off-line Water Wash.

    I would like your professional opinion on this problem that we had a couple of weeks ago. We were carrying out Off-Line Compressor Water Wash, when the turbine couldn’t break away, even though the unit was in crank mode and the starting motor was running. Subsequently, several attempts to put...
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