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Hi, About the best "training" I know of for gas turbines is available from Cranfield University, at Cranfield, Bedfordshire. But this training is primarily for design and maintenance, I believe--not "field engineer" training, per se. Do you want to be a mechanical field engineer, or a...

>Whenever IGV wants to open more the negative current is fed >to the moog valve and actuator tends the valve to open upto >Ref position. And with respect for closing action the >positive current is fed to the torque motor and the valve >gets closed by the action or help of flapper, nozzle...

Esoteric_Stone, I think this, or a very similar problem, was recently posted and responded to. At any rate, I'm going to be brief. The most likely causes are, in order of likelihood from highest to lowest: --Bad ribbon cable running between the LCC, DCC and TCQA card; this cable has no...

Ramana, When I searched for "variable reluctance speed sensors" (double quotation marks included in the search field) I found several examples of circuits in more than one of the search results. I'm not familiar with PIC32 controllers, but your mission is to devise a circuit that converts...

Try this: https://powergen.gepower.com/content/dam/gepower-powergen/global/en_US/documents/technical/3620M_0215.pdf

The industry "convention" is that the shield drain wire should be earthed/grounded at the source of power, which is usually the control system end of the wire--but not always. And, that's just a convention. Which is especially convenient for sites which use a protective earth grid and instrument...

ramana, From the information provided, I can't tell if you are trying to replace a failed or failing speed sensor that is connected to an existing control system on a diesel generator, or if you are trying to design and apply a new diesel generator control system using a micro-controller. Or...

sggoat, This additional information is very useful, and would have been even more so had it been included with your earlier post. I have to say, though, if the turbine control systems of the 7Bs you were in charge of used 3rd stage forward wheelspace temperatures as the permissive to allow...

Wajid29, Thanks very much for the feedback! "Feedback is the most important contribution!"(c) here at control.com, as it let's others who read these posts in the days, weeks, months and years to come what worked, what didn't, and how problems were eventually solved. Feedback provided by...

Hello, If you're re-starting a unit after a maintenance outage, that's technically not a "first fire" event. First fire refers to the first time a gas turbine is ever started during installation/commissioning. There are a LOT of tests to do prior to and during first fire, some of which are...

muddasir, Um, ..., er, ..., eh, ..., GE manuals--even the ones produced by their Belfort division (which are largely responsible for Frame 9s these days (9Es and 9Fs)) aren't usually very helpful in understanding a lot of things in detail. They are usually pretty good at the basics, as most...

muddasir, The thing that most people are somewhat surprised to learn about starting means is that the amount of torque being transmitted from a prime mover of some sort (electric motor; diesel engine; etc.) must be variable. One just can directly couple an induction electric motor--which runs...

sggoat, Over the three-plus decades I've been working on GE-design heavy duty gas turbines (specifically Frame 9E and Frame 7E/EAs), the minimum times for cooldown operation have ranged from 13 hours to 48 hours--these numbers were from factory settings provided in the Speedtronic turbine...

brownsugar, Some blocks need to know what the application code scan rate is--for many Mark VIe heavy duty gas turbines run the application code at 40 ms, or 25 Hz. The scan rate is specified in one of the main application code configuration pages--by GE or the packager of the turbine. The...

Harris, The philosophy--and resulting logic--for turbine-, accessory- and load compartment vent fan operation is dynamic, meaning that is has evolved, and continues to evolve, over time--in this case, decades. It would be necessary to know a lot about how the compartment enclosures are...

Imran Wazeer, > So what would be the maximum for which GT can be put on turning gear? It would be most helpful if you could provide details about how you operate, or plan to operate, the unit on turning gear (cooldown). 24 hours? 48 hours? Indefinitely? There is a minimum amount of time...

muz_sidhu, So far, your English is just fine. Please just try to be as precise as you can (as you would when discussing technical issues in ANY language), and provide as much information as you can and we should be just fine. I am, however, having a very difficult time understanding how...

curiousone makes an excellent point: The value of back-ups <b>CANNOT</b> be overestimated. For example, if one had a back-up of a known working GE Mark V HMI condition that could be used to return to a known working GE Mark V HMI condition. I don't know as I go so far as to say that changes...

murali_aramco, I have been <b>extremely</b> remiss for not asking: How many (and which) of the units at your site that we are discussing have DLN-I combustors? Because, if any of the units we have been discussing have DLN-I combustors then 'Manual IGV Exhaust Temperature Control' <b>WILL...

FS, Yes, it certainly could be caused by reverse action of the governor/actuator. I presumed the unit had been running without problems for some time and just developed this problem. I have encountered diesel fuel filters that would allow full speed operation--but very little more than...