Recent content by transporter84

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    Lube Oil Pressure Drop during Acceleration - GE 9E

    We are facing an issue during the startup of one of our Gas Turbines Units. When the unit is on turning gear, Auxiliary lube oil pump (AC) is running and delivering normal pressure (around 6 Bars). However, during startup while unit is accelerating at 1500 RPM, the pump header pressure drops to...
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    Exhuast thermocuple reading Flactuation after startup

    We are facing an issue with exhaust TC in GE Frame 9E Gas Turbine unit with Mark 6e control system as follows: When unit is running, TTXD-6 reading fluctuation from normal value to minus value and accordingly Spread is increasing. Once we go for shutdown, TC value is showing steady value but...
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    SRV is Hunting During Startup ONLY - Frame 9E

    In one of our units, GE Gas Turbine frame 9E, Controlled by Mark IV+, the SRV start hunting and P2 pressure is flactuating as well from firing till FSNL. After synchronization directly, SRV is not hunting and performing very normal. there are no other alarms or diagnostics. We have replaced the...
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    Trip oil & Hydraulic oil in GE frame 9 Gas tubines

    Why we need to have a trip "control" oil in frame 9 gas turbines? why we can't just control the hydrauilic oil directely by solenoid valve to block it in trip cases? Moreover, What is the use of trip oil pressure switches 63HG-1/2/3 protection? If we lose the trip oil, the dump / stop valve...
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    Gas Turbine Trip without any alarm

    Dear All, We have a GE Gas Turbine unit with Mark IV+ control system. Recently, unit tripped 2 times without showing any alarm. We have an information system (from ABB) connected with Mark IV+ to work as historian and trender. We observed from there that all the parameters like NG pressure...
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