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Okay. This is not a simple topic, and there's a lot we don't know about your plant, like if there are transformers on the output of each generator, or one after the bus the generators are connected to, if the transformer has tap changers, what the system voltage was when these events...

Dinster, First, I would ask: When did this problem begin? After some maintenance outage? Second, I've looked through the documentation I have (Piping Schematics and Device Summary) for an early DLN 2.0 9FA and I don't see a D5 device. Without being able to see the Gas Fuel Piping...

parag, You ask some interesting questions, but don't provide any context (like, why you are interested in exact seal oil flow-rates). To my mind, and I have no data to support this, but I believe more seal oil would be required when the shaft was turning if only because the shaft surface...

When operating the IGVs in Manual Control mode, you can never open the IGVs more than the IGV reference that's being calculated by the Speedtronic. You can only limit the IGV position to something less than the IGV reference with IGV Manual Control. I would have to believe that based on the...

The problem with having a separate seal oil system is that at some point the seal oil and some of the bearing lube oil will eventually mix, and so I believe that's why the same medium (lube oil) is used for both bearing- and seal oil. Treating a portion of the lube oil is going to be costly and...

You might get lucky and someone who had one of the Woodward upgrades that came with a written DOSO (Description of System Operation) will send you a copy of theirs. But, short of the drawings for the relay ladder logic of a two-shaft gas turbine I doubt you'll find much in the way of a...

You didn't say what happened to necessitate changing BOTH the UCVE *and* the VCMI at the same time. I would consider that to be a rather drastic failure and troubleshooting method, but I don't know what the circumstances were that led to this condition. I've been looking for a procedure for...

JKH, The location of devices and equipment is the purview of the manufacturer. A lot of manufacturers put the driven device (typically a generator) on the exhaust end. This causes some difficulties with sealing the exhaust, which means money and extra expense. So, some units are built with...

1- Ummm, ... 360 / 60 = 6 2-The frequency of any AC generator can be expressed by the formula: F = (P * N) / 120 where F = Frequency (Hz) P = Number of poles of the generator N = Speed of the rotor (RPM) 3- Umm, ... Because that's the way the manufacturer designed it?

Sam, The tables in the documents cited are based on tests of tubing of various materials at various pressures, and have some margin of safety built in to the recommended pressures for the tubing sizes in the tables. To my mind and my way of thinking, the total forces in a large pressure...

You were asked if you used a quality anti-seize. There's anti-seize, and then there's anti-seize. There are purchasing and sourcing people ad managers who will buy the cheapest can of anti-seize they can buy without any regard for its temperature rating or the applicability of the material for...

Parag, So, what keeps the Instrument Air system up to pressure during a plant black-out, and for how long can the Instrument Air remain at sufficient pressure to operate the emergency turning gear mechanism? When was the last time the emergency turning gear mechanism at your site was used...

Again, you're in the realm of design philosophy and/or design requirement. Would it be reasonable to expect the steam turbine manufacturer or packager to include a back-up to the reverse power relay? Sure, it's reasonable, maybe even prudent. But, the designers may have had constraints or...

marco, Glad to be of help, but I had occasion to talk with another former colleague and he had a slightly different read of the manual (and I don't even know if they were reading the same manual!). I already thanked them both profusely (and they will both call in the favor some day!). In...

The Mark V Application Manual (GEH-6195) has a chapter on editing the CSP. When you finish that, you need to run the Control Sequence Compiler to compile the CSP for downloading. Then you need to usd the EEPROM Downloader to download the CSP to the Mark V processor(s). then you need to...

Bolting problems. On control.com. Okay. I guess the Mechanical Department will ask anyone for help when they're desperate. The question is: Will they give credit where credit is due if the help proves valuable? Do you use a quality anti-seize thread "lubricant", sometimes called...

marco, I'm really glad you took the time to explain to tell the story. Isn't this sadly typical? I contacted my colleague again, and it seems, from his reading of the manual while we were on the phone (both of us on mobiles) that the SIS turbine control system for an application would...

Happy to have been of some help! Thanks for the feedback!

you might be looking for something, but it's not clear exactly what you're looking for, even when you express your request in all capital letters. are you looking for a control system? are you looking for a written description of the sequencing and operation of a control system? are you...

My idea is to have a look at the P&IDs provided with the steam turbine to see if there is any indication of gland sealing steam being used for heating purposes during warm-up. Or even the instruction manuals provided with the turbine; there used to be a document for GE Steam Turbines called...