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MPAC, No; one can't tell from looking at the outside of the panel, or even by opening the doors and looking at the cores. One has to open the core doors and look at the cards installed in the cores. There are actually four versions of the Mark V: "A" "Hybrid A" "Hybrid B" "B"...

Chris IWO, I just had a quick look at the PQM II manual (GEK-106435P)--and it's pretty darned good for a GE manual. I'm sure you'll have to know the CT- and PT ratios that you'll be connecting to the device, and that should just about get it up and running (at least the displays). You...

Rangacharya, From the information provided, we can presume the gear box was not experiencing high vibration problems before it was disassembled and clearances measured and then reassembled. One of the first questions to answer when a problem like this occurs is: What has changed? In...

sriram sandep, >does steam turbine trip on condenser >protection activates the diverter damper >to trip or not? The answer to this question lies in the plant design and operations manuals and documents. Some diverter dampers cannot change position when the gas turbine is running--there's...

abdi, There's nothing I can add to change your supervisors minds. I would just like to see the photos of the liners when the next outage happens. And get just 1% of the cost of the outage to repair the damage.

Bill Futch, I don't have any Frame 7EA sequencing to look at as of this writing, but I can say I'm not sure if a normal shutdown (STOP) is initiated during a START the unit would go on a fired shutdown (that would be good idea, but I don't recall ever seeing logic for that). It should...

PC, When you say MW spike were the turbines operating in Pre-Selected Load Control at Part Load (less than Base Load)? If so, what was the Pre-Selected Load Control setpoint before the spike, and what was the setpoint after the spike? If the units were not operating in Pre-Selected Load...

Gary, If you are wanting to "...manipulate [the integrating] control valve's openness..." that you wrote about in your earlier post, then you're going to need a current source which is capable of putting out the null current (160 mA). And, as noted, increasing or decreasing the current from...

Neo, Hope the NO/NC explanation was clear. I can sort of understand how people can be confused by this, but it's really very simple. The problem seems to be visualizing that the NO or NC contact we see on a drawing or schematic or in application code seems "fixed"--and yet it changes state...

Izhar, Thanks for the feedback! We don't know what kind of combustion system is used on the turbine (conventional, diffusion flame; or DLN-I)--not that it makes a lot of difference, but it is helpful to know. If the unit has DLN-I combustors it could be that dynamic pressure oscillations...

ahmed, Cleverly hidden at the far right edge of the Menu bar of every control.com page is a 'Search' term entry field. I do recommend using the Search 'Help' prior to using it the first time, and I also recommend using several different search words and terms when looking for information (as...

fluidflow, Oh, trust me--I understand about the misgivings one can have when leaving The General. And, the "support" one gets from friends and family for leaving such a prestigious, major multi-national corporation can be less than encouraging, even years after you're made the decision. So, I...

fluidflow, Thank you for the kind words. I wish your experience had been much better. Had you been able to find an informal mentor or mentors you would probably have had a better chance of success. Life isn't about what happens to you--it's about how you react to what happens to you...

Neo, Sure! You can ask questions--that's what we're here for. Where to start? (Why is it that the simplest things can be the most difficult to explain--especially in writing?) We can agree that a contact--whether it's a physical contact or a "virtual" contact in software--can be in one...

Robert Scott, EXCELLENT write-up! Thanks very much.

henry lob, My first question would be: What has changed? Presumably, things were working fine, and then something changed.?.?.? Generators have exciters to control voltage. When generators are operated in parallel as you are describing the exciters have to be tuned so that they will all...

Neo, I've been re-reading your previous post, and now I see that l86tgt1 comes from one of the discrete inputs to the TREG card--not a normal DI or DI/DO card: J3:IS200TREG 1D5-Contact3-G1\l86tgt1 And this is where I'm making my mistake--the TREG discrete inputs can't be inverted. So...

Neo, I've been thinking about this, and this would be a valid rung--though it would not work (if l86tgt1 is inverted and driven by a normally open 86TGT-1 that's open when the lock-out relay is TRIPPED):<pre> <b>L86GT</b> l86tgt1 L86TGT1Z ----|/|--------( ) |...

Neo, I may have completely missed something here.... You have twice typed (and I have once copied and pasted) the following?<pre> ><b>L86GT</b> > l86tgt1 L86TGT1Z L86GT >----|/|--------( )------( )</pre> This is an "illegal" rung if indeed the element for L86TG1Z is a coil (as...

The answer to your question has to be obtained from the documentation provided with the AI card you are intending to connect the transmitter to. It should have some indication of how transmitters (2-, 3- or 4-wire) can be connected to the card. In some cases I have seen a separate 24 VDC...