M
Dear All,
We have a 60MW GE steam turbine. We are facing sudden pressure dip in control oil pressure from 180 bar to 140 bar for a very short time and standby pump starts on Auto CutIn.
We have separate Control Oil System independent of Lubrication Oil of Turbine.
We have checked the PRVs / PSVs / NRVs and Nitrogen bladder pressures that are OK. The pressure drop issue emerges multiple times for two three days and then vanishes without any corrective action. Again emerges after couple of weeks.
We have a 60MW GE steam turbine. We are facing sudden pressure dip in control oil pressure from 180 bar to 140 bar for a very short time and standby pump starts on Auto CutIn.
We have separate Control Oil System independent of Lubrication Oil of Turbine.
We have checked the PRVs / PSVs / NRVs and Nitrogen bladder pressures that are OK. The pressure drop issue emerges multiple times for two three days and then vanishes without any corrective action. Again emerges after couple of weeks.