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All, I want to make a clarification here about total generation exactly matching total load to keep frequency at nominal. Let's consider the bicycle analogy again. To propel the rider (and any load: rider(s) and/or package(s)) at a constant speed the torque being provided to the crankset...

It's not clear from the information provided how much current is being carried on the 125 VDC signal wires and how much current is being carried on the 24 VDC wires. It's also not clear if the wires in the multi-conductor cable are individual conductors ("cores") or twisted, shielded pairs...

Kamel, The way I learned it in university, and the way I like to explain it is thusly.... There are two magnetic fields in the generator: the one produced by the excitation applied to the generator rotor, and the one produced by the current flowing in the generator stator windings. The...

Daniel, I must not have been very clear. When your turbine-generator is <b>synchronized</b> to the grid where hundreds of other generators and their prime movers are also synchronized the frequency of the "grid" <b>***IS***</b> the frequency--and therefore the speed--of your...

I've seen businesses buying equipment from fabricators taking the information from the fabricator and shopping it to off-shore fabricators. It doesn't say much about the integrity of the businesses doing this to the fabricators they do business with, but it certainly speaks to why more...

Daniel Chamorro, You are welcome. When a generator and its prime mover (a combustion turbine in your case) are connected to a grid in parallel with many other prime movers and their generators, the frequency of the generator (and the speed of the combustion turbine) are fixed by the grid...

Daniel Chamorro, Bravo! You are wise to anticipate and ask before you need to know; it will help if you develop your understanding before actually having to know how something works if it doesn't work or doesn't seem to be working properly and you have to fix it or diagnose the problem (which...

avins, The short answer is, no. There is just too much variation between turbines and sites and ambient conditions to develop a general rule of thumb--other than to say that increasing filter dp increases heat rate. Something to be aware of is that as the filter dp increases the forces...

Ummmm,.... Errrr,.... Ehhhh,.... When the differential pressure across a pleated paper filter gets high enough the usual result is that the paper ruptures (tears) and a great deal of the contaminants which were contained in the pleats make their way en masse in to the hydraulic supply...

Md. Assaduzzaman Bhuiyan, Bearing #1 is the furthest bearing away from the generator, and is also separated from the generator by the reduction/load gear and the load coupling. It would seem pretty unlikely that some issue with generator rotor balance would affect the bearing furthest away...

Kamel, I'm curious about the bicycle analogy and if it was helpful at all. I find that most people don't really understand why we "produce" electricity at all. It's just something that most people take for granted. If we think about a bicycle being used to do work (move people and/or goods...

G.Rajesh, Isn't this what <b>you</b> expect, also? Don't you find the feedback to be of the most help when trying determine if the problem was resolved or the question was satisfactorily answered?

ashiq, The "air intake duct" of a Frame 9FA is very large. If your friend said, "I can't read my watch when I put it on my arm," you would presume he meant the wrist area of his arm, but, he might be putting on the bicep area or in the fold of the elbow. Without seeing where, or without...

Md. Assaduzzaman Bhuiyan, You have not provided enough information to be of much help. When did this problem start? After the generator rewinding? Was there other major turbine work while the generator was being re-wound? Were turbine buckets replaced? Was the turbine rotor removed and...

Hi, I presume by "air intake" that you are talking about the turbine air inlet filter system. Put on a surgical or dust mask covering your mouth and nose. Now breathe through that mask. How does it affect your breathing? As the mask gets dirtier, how does it affect your ability to breathe...

Kamel, I think you do have doubts, because I don't understand what's not clear about the answers that were previously provided.... >> 1-for finite sys increasing excitation can produce VARs or only voltage will increase. > What i mean here, for a small grid (island mode) if there are...

All, This is good news--and still further proof that the ever-mystical, mythological, marvelous, mysterious and magical Moog servo-valve is <b>NOT</b> the root of all evils. And should not be the first suspect or the first thing to be replaced when it doesn't behave as expected. Thanks for...

Ayman, You also didn't mention if you had observed the coupling between the fuel pump clutch and the high pressure liquid fuel pump to make sure the pump is turning and the clutch or coupling is not slipping. If there is no fuel getting past the check valves and (again, you <i>didn't</i>...

Ayman, You didn't mention if the 'Start-up Fuel Flow Excessive' alarm is being annunciated (or if the logic is being forced to keep it from being annunciated and tripping the turbine.?.?.?). Unlikely, but there may be a problem with the flow divider.... Those things are usually pretty...

Ayman, If I understand correctly, you have managed to get fuel to the turbine compartment (and to some barrels) so the lines have basically been purged of air. Some air will make it's way into the lines in the turbine compartment in the course of re-connecting them, but it should easily be...