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I agree with Bob Peterson. Almost EVERY site or manufacturer has its own standard or practice. ("The best thing about standards is that there are so many to choose from!"--from a control.com Fortune.) Some larger companies (utilities; refiners; process plants) have wire-marking standards that...

Raman, I think one reason you haven't received any response(s) to your query is that we don't quite understand the post. The title, the synopsis and the body are all a little different--enough to cause some confusion (at least on my part). You haven't really told us enough about the...

Bill, This is the second time you've posted for this information. While you may have a preference for these types of labels, I think you are finding that there is no such preference in many shops, or from Customers, in most places in North America and Europe. The o-type PVC labels you...

Newbie, There is a 'Search' field cleverly hidden in the far right corner of the Menu bar at the top of every control.com webpage. I typed the following term (including the double quotation marks): "wet contact" into the 'Search; field and clicked on the question mark to the right of...

Karthi, LVDT calibration of the SRV is NOT critical to turbine operation. If the gas fuel supply pressure were to change when the turbine was running stably at, say, 12 MW, and the SRV was at 48% stroke this would cause the actual P2 pressure to drop with respect to the reference. This would...

Karthi, As was written previously, there is an "inner" control loop and an "outer" loop. As was written previously, also, try this thread for more information: http://www.control.com/thread/1351780247#1351831993 The feedback from an LVDT is voltage, which is converted to percent. The...

Antonio Perez, You are most welcome, and thank you for taking the time to say thanks!

FSX, It's pretty clear the individual responding to your requests for additional information is not a native English-speaker. Worse, it's also clear this person does not have any real-world experience with hydraulic systems. One could understand how it would be advisable to have a...

Karthi, Let's say the load is 10 MW, P2 pressure reference is 8 barg, actual P2 pressure is 8 barg, SRV position is 42%, and FSR (GCV position) is 50%. At this condition, the actual P2 pressure is equal to the P2 pressure reference, so the SRV does not need to change position (42%). Now...

Hi, FAL is the Liquid Fuel control servo output current. You haven't told us what fuel you are trying to start with, what version of Speedtronic the turbine has, and what alarms (Process- <b>AND</b> Diagnostic!) are being annunciated when you are unable to start the turbine. Also, you...

Hi, John, Thanks for contributing!

Hello, The <S> VPRO is also called <Y>. Since the VPRO trips the turbine if an overspeed is detected OR if the rate of change of the turbine speed exceeds a pre-programmed level it's likely there's a problem with the speed pick-up providing the signal to <Y>. There should be other...

Hazim, When did this problem start? What is the frequency when the generator breaker trips? What is the rated generator terminal voltage? Is there some large motor/reactive load being started when the V/Hz protection operates?

Karthi, 1) When speed is stable, the P2 pressure is stable. When the GCV opens as the machine is loaded, the P2 pressure would tend to decrease--but the SRV opens to maintain the P2 pressure. As the machine is unloaded and the GCV closes the P2 pressure would tend to increase but the SRV...

Mambo, The "reasoning" used to describe the maximum IGV operating angle change and P2 pressure reference change is ... questionable, at best. If the unit is using "straight" Droop speed control, and you observe the FSR at FSNL to be 21% and the FSNL FSR is set to approximately 14, that...

gosp engr, If by "...we have same issues at our site...." you mean you have two or more failed T/Cs and are asking, essentially, how many failed T/Cs you can run with, the answer is essentially: two (2). When a third T/C goes "low" that's enough to trigger one of the exhaust temperature...

Mambo, So, this is the machine you wrote about some time back.... LOTS of changes--and the most relevant to your original post in this thread are the changes to the gas valve internals and the fuel nozzles, with no mention of any changes made to P2 pressure reference or FSR constants...

mik, Obtain a copy of GER-3620. (No; I can't send anyone a copy.) It doesn't make very good economic sense to burn all that fuel at FSNL, or even 2-5 MW for long periods of time. It takes a good deal of energy to keep a gas turbine spinning at rated speed (primarily to drive the axial...

Without being able to use the figure from the CSP/application code running in the Speedtronic turbine control panel at your site it's very difficult to explain easily. However, if you can find the signal TTXSPL and where the signal is "written to" you should be able to work backwards from...

JP, Again, something has changed. P2 pressure is the "push" that gets gas to flow through the GCV. If the actual P2 pressure is lower than the Speedtronic turbine control panel believes the P2 pressure is, then that could cause less gas to flow through the GCV. So, you found no...