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Rajesh Elangovan, This really should have a new thread. GE uses the (GE-modified) ANSI Device Number scheme for identifying devices and instruments--and AC (Alternating Current) motors. The ANSI Device Number for an AC Motor is 88. GE then adds a one-, sometimes two-, alpha-character...

Hmmm.... Just a few quick answers was all that was asked for: 1) Frame size of machine with problem? 2) When did the problem start? 3) Describe the basic steps when the LVDT was replaced 4) How do you know the IGVs are only at 60-some DGA? Not much to ask. Shouldn't take too long, even if you...

H.J Kim, You've got it pretty straight. 1. You're correct. Typically, without IBH the unit can't get into Premix Steady State during loading and will transfer out of Premix Steady State (to Lean-Lean combustion mode) at approximately 80% of rated load. And, as you correctly noted, that's...

sandeep03pradeep, You didn't say what Frame size GE-design heavy duty gas turbine you are working on. WHEN did this problem start? After a trip from load? After a maintenance outage? Can you describe the basic steps involved in installing the new LVDT (and if the unit only has a single LVDT...

racer2, My guess is that you have the mains power wires (220/230 VAC) and the low level signal wires run in the same conduit or very close to each other. Most often--in my experience--electrical noise is induced from an AC source that is in close proximity to the low level signal wires. It is...

Makster, Yes; the salespeople working for BHGE/GE are NOT really knowledgeable about the products and services they are selling. They are under a LOT of pressure to SELL, and they don't get much training and very little feedback. Once the order is booked, their involvement is finished and they...

makster, I believe GE (the former BHGE, also formerly known as GE Measurement & Control, among other various and sundry names and monikers) have done at least one Alstom tornado unit in the past (in Australia, I think it was). I believe it went reasonable well as I recall, but commissioning did...

To add something which may be very important to understand, each CDB (Control Signal Database) signal in Mark V has a "longname" description associated with (well, almost every one--at least every signal SHOULD have one associated with it). There is a file, LONGNAME.DAT, which should be specific...

samson16, Any control system integrator which has agreed to perform this control system replacement MUST have considered they were going to have to learn how to read the Mark V control sequence program. There is a section in the back of the Mark V Application Manual, GEH-6195, that describes...

samson16, Have you received the information in the format you requested? Decades ago GE used to provide such a flow-chart of start-up operation as part of the Control Specification group of drawings. But, that practice ended in the early 1980's, though there is a rumour that the Belfort and...

samsed, My question was intended to reflect how much information you provided in your original post, which was, essentially: none. 1) When did the problem occur? After a trip from load? After a loss of power to the turbine control system? After a power surge (say, from a lightning strike or a...

samsed, My toe is crooked.

Well, the "constant pressure" thing is just that--it's a thing. An ideal thing. In reality, when you add more fuel to the combustor--even if you hold the air flow constant--the pressure in the combustor increases from the combustion of the fuel. It's not a huge increase, but it is an increase...

Hayoper, The OEM has implemented a number of different schemes for ensuring (or trying to ensure) a reliable and quick fuel transfer. You really need to contact the OEM and give them some information about the control system and software versions and any special systems (such as a liquid fuel...

Hi, Sukumar, You should try contacting Gas Turbine Controls or one of the other vendors that specialize in Mark* and Speedtronic and EX control system parts and cards.

Bert@2020, This is probably not the proper forum for your question. This is primarily a forum for industrial automation issues. You would probably have more success if you used your preferred World Wide Web search engine and searched for Support forums for your make and model of PC (which you...

Really? My watch isn't working. What could be the problem? Would you ask, ”Is it a digital watch or an analog watch? Does it have a battery or is it solar powered or does it have a mechanical watch mechanism? Is the time correct once a day, or twice a day or not at all during the day? If it...

makster, The Process Alarm you asked about will be active when the backup, or secondary, exhaust temperature control reference value (TTRXS) is less than primary exhaust temperature control reference value (TTRXP). The exhaust temperature reference used to control and protect the unit, TTRX, is...

Question 1: Reducing the air flow through the machine by closing the IGVs while maintaining the same fuel flow-rate will cause the exhaust temperature to increase. Question 2: The DLN-I combustor burns fuel in Premix Mode Steady State mode in an extremely lean fuel-air mixture, and it can only...

bolbeba, The Speedtronic Mark IV Maintenance Manual has the details of making changes. You will need a RS-232 serial cable, and a computer with a serial port and basic communication program (MS-Windows HyperTerminal works just fine, or any basic terminal emulator program that can connect to a...