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otised, Thanks very much for the clarification! We don't hear from you often enough (hint, Hint). I wasn't saying the question was inappropriate; rather that the information isn't usually distributed by the packagers of the turbines, and some of it would likely be considered by the turbine...

Esoteric_stone, Very good background information; thank you! On a TMR Mark V, approximately one-third of the exhaust thermocouples are connected to each of the three control processors and if <R> was found to be at A8 then it's likely TTXD1, TTXD4, TTXD7, TTXD10, and so on, were found to...

AAK, glemmorangie is sort of asking, "What have you been drinking?!?!" (pun intended--glenmorangie is a brand of very good Scotch whiskey) These aren't <i>generally</i> published numbers (in the Service/Maintenance Manuals, or in the Control Specifications), though packagers of GE-design...

Hi bil07, Servo-valves are driven by the TCQA I/O card in location of the control processors (<R>, <S>, <T>) (the digital signal--the reference--comes from the DCC/SDCC card, to the TCQA which converts the reference to an analog signal which is then cabled to the TCQC card in location 4 and...

elinordo, It's not really clear if this issue has been on ongoing issue since commissioning or a problem which recently started. If it's recently started, when did this problem start? Because if the PC OS is WinNT/Win95 then it's presumed the problem hasn't persisted since commissioning...

SM, Thanks very much for the feedback!

khalif, Thanks for the feedback; glad it was helpful!

Saied Try this thread--particularly Bruce Durdle's and nic's comments; especially nic's comment with the formula: S=P+jQ.

bkarim55, Thank you for the kind words! GE-design Frame 9E heavy duty gas turbines are rated from 100 MW (older machines) to 125+ MW. The CPD for this range of machines is large, and while the range described by the original poster is fairly large it's not outside the realm of possibility...

Saied... Unfortunately, you're being drawn into a long-running dispute between Mr. Phil Corso and myself. If you need maths and formulae and vectors and EMFs and counter-EMFs and back-EMFs and load angles and air gaps to understand, you can write to him at [email protected], provide him...

Esganfia, Hmmm..... Is this something that just started recently, or has it been ongoing for a long time? Is it a Mark VI or a Mark VIe? Some early "hybrid" HMIs used for Mark VIe used TCI. Most Mark VIe HMIs don't use TCI; they use WorkstationST. I'm kind of confused by the reference to...

premkumar, It's the mass of the shaft and the type/design of bearings and shaft journals. For example, horizontal tilting pad bearings usually need a little "help" at low speed and for turning gear operation. Journal bearings can be designed such that they don't require jacking/lift oil, but...

premkumar, Thanks for the feedback (no pun intended!)! Glad to have been of help.

Saied, Lots of questions--good questions! Unfortunately, I will only be able to give real-world operating examples in this area; I find detailed maths to be proofs of reality, and it can be very confusing if trying to explain reality with maths. (Also, we can't draw pictures or vectors or...

premkumar, Further, if the turbine was running and the discharge pressure from L.O. Pump A (the "main") were to drop below some level, that should automatically trigger L.O. Pump B (the "standby") to start. An operator shouldn't have to take any action to start L.O. Pump B--it should be...

premkumar, What is a 'discrepancy?' You mention something about command and feedback? What is the feedback--motor starter status or pump discharge pressure? (Motor starter status is an auxiliary switch on the L.O. Pump motor starter that provides an indication to the control system of whether...

khlatif, Presuming you have a Mark* Speedtronic turbine control system provided by the packager of the turbine-generator, it's very common for there to be a manual push-button somewhere near the diesel engine starting means assembly (in the Accessory Compartment) for testing the diesel engine...

barswann, > The likely reason the HMIs are still using the original > ARCnet cards is that there is no current version of ARCnet > card being manufactured currently which is compatible with WorkstationST. I had another thought/possibility about this particular aspect of your...

dontknowman, This is a great question, and one that few people take note of--or care to ask about. It's just kind of accepted, but rarely questioned. First of all, axial compressors are pretty unique machines. If you plot CPD versus speed you will see that CPD doesn't really start to...

g.rajesh, David_2 gave a great answer (as usual!). My question is: If it was working and then suddenly started going negative, what caused the change? What is the name of the signal which is associated with the counter which is having problems? (If the signal has a _LSW suffix, please...