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Dayo, Thank you for the photo. Hope all is well !

CSR, Today I was able to import the csv portion of the Trip Display into MS-Excel and do some more analyzing than I was able to on my smarter-than-me phone. It's pretty common, though not desirable, for many units to reach temperature control during acceleration and for the FSR to be limited...

Soumitra, This is not a controls-related issue. It is most likely the result of improper ordering of fuel nozzles, or improper reassembly of combustors or transition pieces. (Fuel nozzles (what you might be referring to as "burners"???) are usually flow-tested by the manufacturer/refurbisher...

CSR, Potentially a very good piece of information that the time from START to trip is 10 minutes instead of 15 and the exhaust temperature was so high the Mark* switched from FSRACC to FSRT--and yet the unit continued to accelerate, eventually tripping. Because usually when a unit goes on...

CSR, Hmmm.... Well it seems the trip occurred at 12:36:34nn, because usually the Mark V Trip Log records three points after the trip (three horizontal rows), and shows a couple of alarms after the trip as well. Here are some snippets of information which might help describe that statement and...

Akin, What time are you referring to--the time from Base Load to generator breaker opening, or the time from generator breaker opening to zero speed (cooldown operation)? The time from Base Load to generator breaker opening is a function of a Control Constant--it's a rate that controls how...

Akin, Sorry; your question is not clear. Are you trying to ask: "What can cause a gas turbine to shut down unexpectedly?" It's a pretty well-followed standard in GE-design heavy duty gas turbine control systems that EVERY SINGLE condition that causes a turbine to trip (meaning the fuel flow...

luiss, People always expect servo current values to be very stable, but in fact they are changing at the rate of 100 or 128 times per second (those are the most common rates of execution of the servo regulator functions--comparing the indicated position to the reference position and adjusting...

Good question. I would imagine that a properly configured and properly commissioned gas turbine-generator in a single-unit power island configuration would have special programming (logic; sequencing) for just such a condition (opening the generator breaker in the event of a turbine trip when...

MSF, For GE-design heavy duty gas turbines, the standard is to open the generator breaker on reverse power AFTER the fuel is shut off to the turbine/combustors. By opening the generator breaker on reverse power AFTER fuel has been shut off to the turbine/combustors it reduces the chance of...

The PRV/SRV valve manufacturer(s) should have recommendations somewhere; if not, you can contact the valve manufacturer(s) for information and assistance.

Thank you for the photographs. What is the current status of the Mark VI? Is it "up and running" or are you waiting for a new TREG? It appears the #3 socket in the receptacle of the BDC card is somewhat melted. Can you send a photograph of the TREG end of the J2 cable, showing the pins in the...

As often as the manufacturer recommends, or as often as required by local technical regulations, codes and standards AND the plant insurance company. Whichever is the shortest amount of time.

Dayo, Saying you should test the new cards you receive is a way of deflecting responsibility and muddying the waters. If you were sold a card, it should be tested and ready for installation and use. How would you test all of the functions of the card? Did the supplier include a copy of a test...

Dayo, Can you post a picture of the J2 connector on the TREG cards (H1BDB and H2BDC)? Was either the TREG or the TRPG damaged in this replacement? Is it possible the TRPG was actually damaged and the TREG was mistakenly replaced? Were the two 24-screw terminal boards removed from the existing...

Hannan900, They are all probably equally adequate for overspeed detection and protection. They can all probably be powered from available power source(s) at your site. They all probably have different options and features, some of which may be useful at your site and many of which may not be...

jeff3030, GE has become really fragmented in recent years; there are different divisions of GE that are selling and configuring Mark VIe turbine control systems differently (wonderful, right?!?!). If you had a Mark V then it's likely you have one of the Mark V-to-Mark VIe "Migration" or Life...

jeff3300, Difficult to say with any degree of certainty without being able to see the application code running in the Mark VIe to see if there is any special or unique code. And there's a LOT of that going around (special, unique code) these days. Generally, though, when dead bus breaker...

PowerGeneration, I can only answer this question specifically for GE-design heavy duty gas turbines and generally for other gas turbines that use exhaust gas temperature sensors to monitor for combustion problems. Fuel nozzle inspections are warranted when there are higher than normal exhaust...

Also, what are the IGVs doing when the load swings are occurring?