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Neo, I think there are some errors in the rungs and the explanations. Please review them and let us know what you find. I'll get back when I can devote the required amount of time and the errors have been corrected. Thanks!

meghla, First, why did you enclose your question in double quotation marks? Are you copying something from another of the 105 replies to this post? Second, have you read any of the 105 replies to this post? Third, a generator is a device for converting torque into amperes. A motor is a...

JohnPlayers, You should be able to see how TNHCOR is calculated and find every occurrence/usage by looking in Toolbox. Its primary purpose is to bias shaft speed based on axial compressor inlet temperature for the purposes of calculating fuel control flows for firing and warm-up (if I...

Hello, The absolute first thing to do is make sure there is a hard (paper) copy of the Process Alarms which occurred before and after the trip. The Trip History display should also be printed for review. The Trip History has the 64 alarms before the trip occurred and the alarms for a few...

Governor response is one of several terms which describe regulation--also known as Droop speed control. Also known as speed governing, speed regulation, proportional speed control, regulation percentage--they all refer to the same basic function. GE calls it droop speed control. Depending on...

Neo, It would seem after you most recent post that inversion masking is becoming clearer to you. Yes; the exact purpose of inversion masking is to make the logic signal associated with a discrete input (DI) a logic "1" when the contact--or the circuit--is open. And, if the signal name is...

Neo, >1) I think i should focus on the main >line,like present i should focus on L4S. >I should set some questions that are not >important at present aside, as we will >have opportunity to discuss those >questions latter (I wish:)) If you have questions, let's try to answer them. If...

A ship without power in navigable water-ways is dangerous--to itself and other vessels, too. I should have asked: <b>When did this problem start?</b> Because, one presumes the two generator-sets have been synchronized together before without problems, which begs the question: <b>What...

O.M.G. If this is happening on a ship, that sails between ports on navigable waterways, GET SOMEONE ON-BOARD TO HELP SORT THE PROBLEM. Please. PLEASE. <b>PLEASE</b>

<b>!!!CORRECTION!!!</b> >Diffusion flame in the Primary combustion zone >above about 40% load (above Primary >combustion mode) causes high emissions >and can lead to serious combustion liner >problems and catastrophic failure. That should have read: "Diffusion flame in the Primary...

Neo, As for that second description of L3STCK0, GE is trying to use the same sequencing with slight modifications for all heavy duty gas turbines. Makes sense, right? If it works, why change it? And it works. Has for decades. Again, it's one of the things that make GE units so desirable and...

sherif elzoghby, I just want to clarify a couple of things. In Primary combustion mode, there is only fuel flowing into the primary combustion zone of the combustor where it is burned using a diffusion flame. Diffusion flame is the orange-red flame we are all accustomed to seeing; it also...

Neo, Whoa, there. Let's not get too far ahead of ourselves. You had asked about relays and discrete inputs (and by extension, discrete outputs) and you're talking about relays here like you have a good understanding of them. A discrete input (or output) to a programmable control system...

hi.. Multiple alternators <b>synchronized</b> to an infinite bus are all acting as one large alternator. No single alternator's output can have a different frequency than that of the infinite bus. This also means that, for all intents and purposes that the voltages of the alternators are also...

David Hackenbracht, LVDTs--and RVDTs (Rotary Variable Differential Transformers, rotary LVDTs--usually have a linear range of operation. If the LVDT/RVDT isn't adjusted such that the "stroke" of the device it's connected to is on the linear range of the LVDT/RVDT then the readings are not...

Neo, Thanks for the information about the turbine at your site. What is the source of the syngas? Does the unit start and stop on syngas, also, or does it use another fuel (natural gas or liquid fuel (distillate) for starting and stopping and you have to transfer to syngas at some speed/load...

Neo, I am working on my response; L3STCK0 is a fairly extensive rung. Please check the "sense" of L45FP_STCK (normally closed or normally open). It is confusing me. It might be a good idea to put the rung in your reply. Please take your time and be certain of the case of signal names...

Which Electronic Overspeed Test was not successful? The Mark VIe has the capability for two electronic overspeeds: One is performed in the control processors (<R>, <S>, and <T>) and is considered to be the primary electrical overspeed, and the other is performed in the <P> (SPROs or PPROs...

Raul, Are you saying that if you synchronize in Manual mode there is no excess VAr flow? What happens when you synchronize in Manual, then transfer to Auto? Many times there is a circuit or logic that increases the excitation slightly after generator breaker closure to ensure there is...

An over-excitation limit alarm means either the field voltage or the field current is excessive for the operating condition. This means that for some reason either the field voltage or the field current was above a setpoint for the load of the machine. Perhaps the setpoint was too low...