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Thanks to glenmorangie's great explanation of combustion monitoring!

nic123, I completely agree with glenmorangie about the undue emphasis on hot- versus cold starts. It's pretty unusual for machines with electric motor starters to be able to break the shaft away from zero speed without the assist of the ratchet, but I have seen diesel starter motors be...

Surya, Has anyone checked with the solenoid coil manufacturer to see if it's suitable for the application on the Aux. Gas Stop Valve. Be sure to explain all of the factors and circumstances. For example, is the gas fuel heated? Have you taken temperatures in the area of and of the solenoid...

Saied, Welcome to the world of synchronous generators and control systems! It seems you are new to the industry and to methods which have been employed for decades (more than a century) for control and protection of prime movers (hydro turbines; reciprocating engines; steam- and gas turbines...

Maythem, Swirl charts are not always accurate; they are slightly better than guessing and only when used by knowledgeable people. They are designed for particular groups of machines with particular compressors and combustors and exhaust diffusers. They are not (contrary to popular belief)...

jesus ch, If the turbine inlet air filter differential pressure is high because the filters are damp from the fog (and maybe dirty--which is what filters do (trap dirt)--then it is advisable to reduce load on the unit to try to prevent the high differential pressure from causing the filters...

dax2172, It's really NOT recommended to run without at least one exhaust frame blower running and properly supplying cooling air--as indicated by the pressure switch. I don't believe the sequencing will allow the unit to be re-synchronized if at least one of the exhaust frame blowers is...

VKGUPTA, Without being able to see the program running in the gas turbine control panel it's difficult to say for certain--and I'm not quite certain I completely understand the question(s). In general, the logic/sequencing for redundant vent fan control will start the lag fan if the lead...

Isn't this an excellent question for GE?

briq, There is precious little documentation about the Mark V for just about any feature/function. That's the way of the world these days--when manufacturers aren't held to provide proper documentation. I'm not aware that time counts differ between English and Metric systems--even on the...

nic123, I'm not buying the ground thing GE is trying to sell. The main reason for separating safety earth from instrument earth is to provide isolation primarily from damage and upsets as a result of lightning strikes. Of course if there are grounds from motors and other electrical equipment...

How long has it been since the elements inside the Mist Eliminator vessel were inspected and/or replaced? Is the loop-seal between the vessel and the L.O. tank filled and working properly? If there's a valve or valves in the loop-seal line are they "locked" in the full open position? The...

Gent, I presume this isn't a new machine, and that the Mark VIe is an upgrade to the original or even the previous control system--AND that the unit has been started successfully for decades and that this problem has just recently started. Would you please confirm or clarify? I failed to ask...

cobtroldhahid, >Could you please explain me the basic difference and >application of "ToolboxST" , "workstationST" & "ControlST". It would be difficult to find someone who works for GE who could define the differences and similarities, as the lines between them are blurred. It seems...

Dear Gent, What Process Alarms are active during this condition? When the FSR goes to 100% and the load is very low, there's either a restriction holding back the flow of fuel, or the gas fuel supply pressure is too low, <b>OR</b> the heat content of the fuel is extremely low. No; it...

Here's the link to the similar (same???) thread: http://control.com/thread/1458830914

Dear Sir, So the sequence of events during a start is that the hydraulic ratchet is energized--along with 20CS-1--until the unit breaks away from zero speed. At that point the diesel starting means should be transmitting a LOT of torque, which should be keeping the clutch teeth engaged. And...

dontknowman, There are very few new problems posted to control.com--but there are lots of similar problems with some very different and unusual descriptions. Have you been following this one? Pretty darn similar, don't you think? To our knowledge (since the thread was basically taken...

nic123, The hydraulic ratchet mechanism serves two purposes: One, to slowly rotate the shaft (approximately 1/8th of a turn every three minutes) during cooldown) to prevent bowing the axial compressor rotor after shutdown/trip from loaded operation. And, two, to assist the starting means...

Jerry123, Thanks for the information!