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Dear Kiran, the basic change to logic for base load vs peak load is a change of allowable exhaust temperature. Peak load settings allow for a slightly higher allowable exhaust temperature, usually around 30 degf. which translates to a higher firing temperature, which finally allows for a few...

CSA, I have to say that this is the best explanation to the loss of gas turbine load output that I have seen. For the longest time I had difficulty understanding why a machine load output would decrease as frequency decreased. And the secret is the operation of an axial compressor. I hope...

Twiling, I can tell that for our site we have replacements for all gas valves for our GE Frame machine. By being a member of a users group there are times that another user may have a part that you can borrow,or purchase. We are fortunate to have funds to purchase parts needed as spares...

Dear ProcessValue, I will try to not stray far from the topic of the original post. In the case of our Frame 5 machines we were able to reduce the unavailable time from almost 19 minutes to less than 8 minutes by replacing the original jaw type clutch with an SSS clutch, and some slight...

Dear Espresso, as with some of the replies. Trips to F class machine=very bad! S*** happens during start-ups, very normal. Waiting for the machine to roll down to "ready to start" = not priceless. Any downtime = money! We faced the same issue with an older GE Frame 5 machine with...

Dear Vinu, our system (ALSTOM) is like one you speak of where the hydraulic system is completely separate from the lube oil system. I do not have it in print but I believe the reason is as P/value mentions that this allows the use of different oils for specific reasons. I know in our...

Dear Mxromen So if I understand correctly this problem only seems to occur when unit A trips, or is in a runback situation? Correct? If that is the case I would be looking at controls that are particular to unit B HP drum level controls and pressure controls. For my understanding of our...

KGE, I am not sure when this happened if there was an "event" that might shed light. But since it seems the PTCT card is ok, the next point is going to be the TCCB card since it processes all signals for the LDCC card.

Dear KGE, I have not seen these codes before so I do not have any good answers at this point. Do you have more than one EX2K? Or is this just a simplex unit? As far as connecting it is possible without the MKV. You will need your .dcb file for that particular EX2K. You should be able...

Typically it is not necessary to use toolbox to diagnose problems on a EX2K system. On older EX2K systems you generally have a MKV controller that is connected to the EX2K and engineering workstation via ARCNET. You do not say what type of turbine controller you are using so I have to assume...

CSA, I will take the time to thank you for the overly long explanation for which many of us should be thankful for, and have grown accustomed to getting from you. I had a general understanding of the spark plugs and ignitors, as well for the flame detectors. But with any subject I never...

Dear MZI, I looked further at my prints for the exciter. I do not know if your site wiring will be exactly the same, so you really need to refer to your prints. But there is an enable circuit for the exciter, it enables a "K86" relay on the power supply board. Wires land on the 2TB terminal...

Dear MZI, I am looking at a list of EX2K alarms. Most of them are very cryptic, they do not provide a clear description of the problem or the resolution. I am not sure why you see a different alarm number on the MKV than what appears on the EX2K screen. Alarm #16 refers to a "normally open...

Vinu, I am sorry that I can not comment further on your question. I do not have any experience with the FA fleet. In my controller file the logic is in the "Fuel_Gas" module, under the "GasLeakTest" task. I understand if you are unable to access logic then this is useless information for you.

Vino, I am not sure of what year and model turbine you are asking about, but I will give a quick explanation of what I am familiar with, that being a Frame 7EA of the 2003 vintage. The control system of later years runs a test of the gas fuel system during startup and shutdown. This test is...

Dear Josh, Glad you were able to locate the CD's that have been spoken of. As mentioned they should be an exact image of the machine as it was shipped from the GE vendor, who is usually CCS Inc. If you had not done any upgrades to toolbox or Cimplicity I would have recommended using these...

Josh, I would echo all that CSA said and add these comments. It will very much depend on how old the HMI is that you are using as to how you can restore the machine. I can tell you from my experience on machines I have that were built in 2003 running WIN2K operating system that GE...

Dear PV, it seems you may be doing things as you are directed, I've been there and done that. But a two second delay for speed pickups is pretty scary! I haven't been around that long but I've seen machines do some pretty incredible things they were never designed to do in milliseconds...

Dear ProcessValue, it indeed sounds like an interesting trip, and it seems you have done some good detective work, but don't you hate the intermittent faults that you can't recreate? My guess in this situation would be some sort of intermittent failure in the I/O net as you obviously...