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Arun/kumara, Briefly, it certainly sounds like there is some obstruction in the cooling water system in the turbine compartment of that particular unit. Another problem might be that air trapped in the piping after disassembly/reassembly after a maintenance outage could be causing this...

hello, They are there to detect leakage of hot combustion gases when the unit is running to prevent igniting vapors in the gas turbine drains tank(s) which could result in an explosion, fire, death and dismemberment. As for why they are reading differently, when did this problem start...

Ayed, There are stories like yours all the time of small glitches in sequencing causing problems such as you have described for years, decades even. If you own the machine and it's not under warranty or a long-term service agreement and you've analyzed and tested as you have described then...

The Mark V keeps a copy of the values of timers and counters in RAM, and another one in EEPROM. I believe the EEPROM value gets updated approximately every sixty minutes, but if I recall correctly that period also changed some time during the production period of the Mark V from a longer value...

SB, It's really difficult to troubleshoot a Speedtronic turbine control panel from the CIMPLICITY displays; they just don't update very fast (faster than many HMI applications, but still not really good for troubleshooting), they are quite often configured incorrectly or lack sufficient...

Hello, I don't see a description of what the DCS does. Does it just display information from the GCP and PMS? Does it need to issue some kind of commands to the GCP and PMS? Most of the GCPs I've worked on had generator metering (watt-, VAr-, volt- and ampere meters), synchronization...

Ayed, Marafiq; those units are getting old--but it sounds like you're taking good care of them! From the information provided, it would seem you've proved your theory--and my recommendation would be to use the 'Hyd. Pressure Low' permissive to actuate the clutch engagement solenoid--and...

Avworhiare, Thank you for the feedback!

SB, When the unit that doesn't have speed issues when running in Isoch mode is in Isoch mode, what--exactly--is the speed, TNH, TNRI and frequency? Please provide data with at least one, preferably two, decimal places. We're splitting hairs here, which means the accuracy of the running...

DAMENE, The only way I know of to change the values of timers and/or counters is to send your .SRC and .AP1 files to GE along with the desired values and a letter detailing the reasons for the changes. They will return a .AP1 file along with instructions for downloading and rebooting to make...

For natural gas to flow into an engine its pressure must be higher than the pressure inside the engine; if the gas pressure is low then it may not be possible for enough gas to flow into the engine to maintain load and speed and the flame will eventually be extinguished even if the control...

Neo, What is the value of <b>FJKGHR</b>? I suspect it's a ratio, with a value near 1.000--but that's just a SWAG (Scientific Wild-Arsed Guess). What is the longname description for FJKGHR in Toolbox? What is the longname description for FJKGHR in the CSPEC? You're going to see more...

Shyam, Thanks for the feedback!

SB, When you write to tell that the unit isn't running at 100% rated RPM, <b>please do tell what RPM the unit IS running at when it's NOT running at 100% RPM.</b> It would also be helpful if you told the load the unit was running at when it wasn't running at 100% RPM. And what the value of...

1) The current drawn by a motor is directly proportional to the load on the motor. Most of the cooling water fans I've worked on had the ability to adjust the pitch (angle) of the fan blades. If the pitch is excessive then the motor will draw excessive current. However, you seem to be able to...

Once again, Bruce Durdle steps in to save the day--thanks! I find it helpful to think of reactive power (VArs; power factor) and system voltage as being similar to real power (watts) and system frequency? For example, when the amount of real power being generated matches the amount of real...

I don't understand the question. If you're saying that hydrogen consumption exceeds the amount "specified" in the manual, then isn't that excessive? If hydrogen consumption is increasing over time, isn't that an indication of some problem or issue which needs investigation to understand and...

Curiousone, When the compressor bleed valve is closed, there should be no flow in the piping--upstream or downstream of the valve. Therefore, the temperature of the piping should be no more and possibly even a little less than the ambient temperature in the compartment when the turbine is...

Neo, This is a great question--I just wish I had an answer as good. This is done for DLN units which use the IGCV (Independent Gas Control Valve) skid. Because all of the gas control valves are connected to (supplied by) a common header/manifold it was felt it was necessary to do a kind of...

Sure sounds like the lube oil is "dead"--for whatever reason. Did someone leave the L.O. Tank Heater(s) energized and shut off the Aux. L.O. Pump? And, if the L.O. is "carbonized" then it's a good bet the L.O. Mist Eliminator elements are clogged. Best to have an analysis of the L.O...