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Will these two generators be synchronized to a grid with other generators? If yes, then they should both be in droop speed control. If no, then only <b>one</b> prime mover should have an Isochronous governor and that machine must be started and loads first, and then the other machine...

Benjamin Pineda, I'm more than a little confused. Anyway, at this point, I can only guess the problem is most likely a problem with the ribbon cable which connects the LCC and DCC and TCQA (and TCQB, if so equipped). If the LCC keypad is inoperative, that would be my best guess. That or...

vinu, The EX2100 is an "AVR" (Automatic Voltage Regulator), or, also called an "exciter," or "exciter regulator. In the past, GE offered PSSs as an optional piece of equipment to their exciter regulators. Now with the EX2100 the PSS functionality is "built-in" to the EX2100 software, and...

Mike, What does your CPM say about the alarms? He or she has PAC access and could help, as well. And, since it's a Mark VIe, it may still be under warranty; have you asked your GE service manager for assistance? The Mark VIe System Guide, GEH-6721, which should be available as a .pdf file...

Benjamin Pineda, This is a new error message for me. Does it come after the processors try to boot up, and then stop, displaying this message periodically? "Unready" seems to mean "I have no OS (operating system),", or, "I can't find any information to load." The latter might be that...

srh, Without being able to know what kind of control system and without being able to see the logic/application code running in the control system it's pretty hard to say what's going to happen if you lose CPD feedback. The most worrisome part of your post, though, is the comment about...

Samual, How much accuracy does your calculation require? What are you using the compressor pressure ratio number for? The formula used by one OEM for calculating compressor pressure ration (CPR) for their heavy duty gas turbines is: CPR = (CPD + Ambient)/Ambient CPR = (118.0 psig...

<b>>>CORRECTION<<</b> When a GE-design heavy duty gas turbine is operating on exhaust temperature control as load increases exhaust temperature will decrease. When a GE-design heavy duty gas turbine is operating on exhaust temperature control as load decreases exhaust temperature will...

Jeff Modernity has nothing to do with your problem. The <I>s had batch files in the G:\EXEC directory to set an HP LJ II-compatible to the right character set and characters-per-inch and lines-per-inch. I think they were called PRINT_DM.BAT (for the dot matrix printer) and PRINT_LJ.BAT...

Hi, I don't know where to start. When the unit is at Part Load the IGVs are not fully open, so the exhaust temperature can be higher than when the unit is at Base Load--part of the definition of Base Load is the IGVs must be full open, which means the exhaust temperature may be (usually...

vimal gupta, It seems more appropriate to answer question 4 first and then refer you back to your drawings--and to the very fine Mark VIe System Guide, GEH-6721, Voll II, Power Distribution section. LFPI stands for 'Legacy Fire Protection Interface' which is typically only used in retrofit...

sdbarman, Please list the Diagnostic Alarms which are being annunciated for all the cards in <T>. If you've swapped cards/connectors between <S> & <T>, then the problem might reside in the <T> rack and/or power supply--which would likely be indicated with Diagnostic Alarm(s). Have you...

Awaneesh, Hmmm..... Are the flame detectors cooled with water (coils placed around the flame detector bodies)? If so, it sounds like the cooling water flow for at least that one flame detector is too high, causing moisture to condense on the lens. By the time you shut down to check/clean...

>If shut down 110VAC power and after UPS >replacement it to be ON then any >possibility of gas turbine trip or any >abnormalities? No. "The HMI does not perform any control or protection of the turbine--that's all done by the Mark VIe. ' > any procedure of 110VAC power off to...

A lot of information, but not much actionable data. Thank you, though for providing the results of your troubleshooting! The liquid fuel bypass valve reference (for all processors) is liquid fuel flow-rate, and the LFBV is positioned to make the feedback from the liquid fuel flow divider...

iqbal, You seem to have been very lucky with your adjustment; most sites that attempt this end up replacing the servo-valve. It's entirely possible that the servo-valve null bias spring was not adjusted properly by the manufacturer, though not likely. What may be more likely is that the...

PRASAD DEVU, Is this same problem occurring on all three of your GE-design Frame <b>3</b> heavy duty gas turbines--or just one of them? When did this problem start? After a maintenance outage? After a trip from load? I have been to several sites where the hydraulic actuators for the...

Er, ..., Um, ... Are you sure there isn't a real problem with "the rotor"? Do you know precisely all the conditions this alarm may be indicating? It's likely this single alarm may be annunciated for any of several possible fault conditions, not just failed diodes (which, if they are for a...

otised, I respectfully disagree that the 110 VAC UPS powers the IONET network switches. They are <b>usually</b> powered by the 125 VDC-28 VDC power supplies in the Mark VIe panel, not by an external power source, UPS or not. The Mark VIe should continue to operate even if the HMI(s) are...

MATRIX, You are working with a GE-design Frame <b>5</b> heavy duty gas turbine equipped with a Mark VIe turbine control system. (The Roman numerals are used for the control system version designation, not the Frame size designation.) Have you used the 'Alarm Lock' function to prevent...