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chillwin, Suction pressure; kind of sounds like a contradiction, doesn't it? But, it's the pressure on the suction of a pump or a compressor. And, some pumps and compressors require a positive pressure on their suction--not all pumps or compressor can draw air/gas/fluid into their suction. Net...

Seeker1988, What is the difference in load <b>and</b> exhaust temperature between the affected unit and one of the units which is operating more efficiently? Are any of the units being operated in Combined Cycle mode (that is, IGV Exhaust Temperature Control ON)? If so, which ones if not...

Bayramoglu, USER is one of the options for the EEPROM Downloader (like TOTD and SEQ and IOCFG). Refer to the Mark V Maintenance Manual, GEH-5980, for more information; or type EEPROM /? at the command prompt and press ENTER to get a help screen for the EEPROM Downloader. I would suggest...

elomoon, The OEM has guidelines for "laying-up" (prolonged idling/storage) for their generators. Have you contacted the OEM for their recommendations? Yes, you will save money by purging the generator of hydrogen (with CO2), and then purging the CO2 with clean, dry air and shutting down...

Bayramoglu, Hmmm.... Did you set the hardware ("Berg") jumpers on the new card in exactly the same position as on the card being replaced? Did you double-check the hardware jumpers? Have you made sure all of the cables on the LCC and DCC card are properly inserted--especially the 3PL cable...

Stephen Hill, I don't generally recommend other World Wide Web forums, but for generator issues like this one have you tried the International Generator Technical Community's Generator sections, particularly the 'Hydrogenerator' and 'Hydrogenerator Vibration and Dynamics' sections? The...

Seeker1988, What Process Alarms and Diagnostic Alarms are active on the affected unit? When did this problem start--after a maintenance outage, or after a trip from load? I can kind of determine what RLNG is (some flavour of Liquified Natural Gas?). But 6833A and 6833B are completely...

samson16, GE did produce what was called the "Mark V Suitcase Trainer", so-called because it was housed in an aluminium attache-/briefcase. It consisted of two DCC/LCC cards--one configured as <C>, the other as <R> (so it was a SIMPLEX trainer), as well as power supplies for the cards. It...

Reoji, If you recorded all of the relays and devices you had to reset in order to be able to re-start the machine, can you list them here? Even if you didn't understand what the root cause of the trip was at the time--if something similar occurs again having this information can be helpful to...

ControlGT, In the Mark V turbine control panel the recorded values of timers and counters are incremented in RAM and stored on EEPROM. If I recall correctly, the timer/counter values are periodically written from RAM to EEPROM approximately once per hour. I believe the value you see when you...

Pie, Why not just have a single system that broadcasts a single time signal that is available to any receiver that wishes to synchronize their clock(s) with a universal clock? Why have to send a request to have every remote installation to synchronize their clocks with a central clock...

Reoji, What was happening at the time the trip was initiated? Was the grid stable, or unstable? Was the generator load stable or unstable? Was the frequency stable or unstable? Was there some lightning strike or other weather-related event occurring at the time of the trip? A lock-out...

Diaa, A velocity sensor is not a speed sensor; it's a vibration sensor, sometimes called a "seismic" vibration sensor. It measures the magnitude of velocity associated with vibration (the sudden changes in motion associated with vibration). How long has this problem been existing? Since...

datao, I'm not sure about Southern California, specifically, but much has been written lately about the advancing age of many instrumentation & control technicians and the problem it's causing for many refineries and process plants around the USA. It seems that several local community/junior...

shanks, The best way to explain a PSS is to say there is a function with some inputs and some outputs, and inside the function some FBM occurs (FBM is Friggin' Black Magic).<pre> ------------ | | Inputs---->| FBM |---->Outputs...

poornimah, Here's a link to a site which I have found to be very helpful to many: http://www.the-power-factor-site.com/ If you still have questions, feel free to ask them here. Do try to provide some context for your question (power generation; power transmission; course...

Mohamedibr752, Holy Smokes! So, one of the things that happens when a problem like this "suddenly" appears is that a LOT of people start watching the troubleshooting and turbine operation, and there is a constant chorus of, "It's never done THAT before!" or, "What is it doing?" Most of...

mohamedibr752, The plots I mentioned are automatically generated when using AutoCalibrate's 'Verify Current' and 'Verify Position' features, and I believe both of these are documented in the Mark V Maintenance Manual, GEK-5980. What's not documented in the manual is the fact that to run...

hany5757, MODBUS communication doesn't generally put time/date stamps from the controller where the data originates. It doesn't preclude using it for control; it just means that if you try to store the data on the DCS for retrieval or try to use the data for troubleshooting it can be very...

mhwest, "...simple but tedious..." is right. Yes; it is possible, but it is tedious using PRIMITIVEs, which is why I didn't mention it. (Will you provide the document to detail the method?) And I have been asked by two sites in the last couple of years about questionable counters which were...