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Krishna, There have been tens of threads on control.com about GE-design heavy duty gas turbine ratchet troubles <b><i>breaking</i></b> the shaft away from zero speed. Most of them all have the same questions, and the same advice. control.com has a very cleverly hidden 'Search' feature at the...

Adeel Imtiaz, A "trainer" for Mark V simulation can be a "suitcase" trainer or it can be a full-blown Mark V panel. Neither would have vibration pick-ups connected to it for simulation (there is a block called KILL_IO to turn off the I/O during simulation). So, if you were doing this with...

kwaku, About the only change I would make to your procedure would be to switch off the protective processors first before the control processors, and when powering the panel up again, switch the protective processors on first then the control processors. I have had much better luck with...

Ahmed samy, It's helpful to think of the turbine control panel as <b>the</b> Mark VI (mostly because it is!) and the HMI as the HMI--the means of communicating with the Mark VI to view operations, send commands, manage alarms (lots of alarms), and configure the Mark VI (via Toolbox). GE...

srh, Thanks for the feedback! "Feedback is the most important contribution!"(c) here at control.com--it's what differentiates this forum from so many others, being able to see what worked--and what did not, and what was useful--and what was not.

K.R. Manish, Thank you for the explanation. Abbreviations or acronyms are useful--once they are understood. When the grid frequency drops, Droop Speed Control loads the turbine--because the error between the speed reference and the actual speed increases. The 2 or 3 MW from your plant...

Napster225, Yes. You mentioned tripping on high spreads at specific speeds (interpreted to mean speeds less than rated speed); the combustion monitor (which trips the turbine on high spreads) is not usually enabled until the turbine reaches 95% or 100% of rated speed. This is true of most...

kwaku, Your diagnosis would seem to be correct based on the information provided. My hesitation stems from the fear of just replacing the PPDA and having the new one fail because the printed circuit card it's mounted is bad, or some issue with the power supply (voltages spikes/dips). I say...

Hi GE, HP and LP refer to 'High-Pressure' and 'Low-Pressure' shafts, and speeds. The pressures are "relative" pressures, one turbine operating at a higher pressure than the other, which is called the "low pressure" turbine (shaft). Some GE-design gas turbines have multiple shafts that spin...

Jyshen, You are most welcome.

Good answers, but the main question was, "Why do we have to take these readings?" The reason readings are recorded is to develop a trend over time of some variable(s), and the biggest reason to trend readings is to try to anticipate problems before they become emergencies. Conscious operators...

Jose Sanchez, I'm a lot confused by your post. I'm not aware of any ACC module on any Mark V processor--<B>, <C>, <D>, <Q>, <R>, <S>, <T>, <W>, <X>, <Y>, or <Z>. If you mean the LCC/SLCC keypad/display on the DCC/SDCCS card in Loc. 1 of the control and communication processors there is...

NVS, I don't believe the impedance difference will affect the Mark IV, but you should be certain the sensitivity ratings are the same. If they are not, you may need to change the input's sensitivity (if possible--some early Mark IV's could not be changed without a new PROMset) to match the...

K.R. Manish, What is FGMO, please? This is a good discussion, and as such, I hope you continue it by contributing your responses to the questions below. Every power plant synchronized to a grid with other power plants, regardless of who owns the power plant or for what purpose the power...

Shrk, www.omega.com is a very good resource for all kinds of sensors, particularly RTDs and T/Cs. You must almost always use T/C extension wire for connecting T/Cs to monitors or PLCs or DCSs or other control systems--unless the device you are connecting the T/C to has the capability to...

Karsten Rasmussen, I think it's going to be pretty difficult to control the speed of a wind mill unless you can control wind speed or the pitch of the blades. Neither is easy. You might be able to use some kind of "transmission" to control speed, but that's probably not very easy, either...

Neo, I have read and re-read this post several times the past couple of days--mostly hoping someone else would tackle the issues with this post. Precisely, what is tripping the "generators"? Are you saying the generator prime movers (diesel engines? combustion (gas) turbines?) are...

Brian, When did this problem start? After a servo-valve was replaced? This is not a simple problem--at least from the description provided. I'm not really clear what the problem is. You seem to be saying that the turbine is not running and that you are measuring the voltage of the three...

Ahmed Sami, Choosing wire/cable for a particular application is a very involved process. Does the wire/cable need to be armor-shielded? Does it need to be twisted and shielded (to prevent nuisance electrical noise (induced voltages) from affecting the signal(s) being carried on the...

mhkhan, It's presumed you're referring SPECIFICALLY to the CSP.PRN file. It means EXACTLY that you are using a font to view the file that is not compatible with the font used to create the file. I have seen the smiley face appear where a page break is supposed to occur. I have seen it...