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G.Rajesh, You are correct about the changes required in ACALIB.DAT. Negative servo current opens the IGVs; positive servo current closes the IGVs. That's why the full open position goes on the POSITION_NEG_SAT line and the full closed position goes on the POSITION_POS_SAT line...

The LVDTs are configured in the PSVO IOPACKs (IOPACKs are not I/O cards; IOPACKs are mounted on I/O cards). So, all you've really done is confirm wiring between the TSVC/PSVO and an LVDT, not even the LVDT that will eventually be in operation. You have done <b>NOTHING</b> to perform a...

Dear, It sounds as if you are manually calibrating the LVDT feedback, as opposed to using AutoCalibrate. If you choose to manually calibrate the IGV LVDT feedback, you will need to extrapolate the 0% (0 DGA) and 100% (100 DGA) values using basic math skills. You will have to collect...

4_20ma, It would seem that the chaps at GE Energy Products-Europe in Belfort, France--never satisfied to leave well enough alone--have succeeded once again in over-complicating what should be a relatively simple operation. I'm afraid that without being able to see the application code for...

I don't presently have a copy of Legacy Toolbox or a dongle to use, but if I recall correctly you can use Legacy Toolbox to find the logic signal which drives Process Alarm Drop 119, then use the 'Finder' feature of Toolbox to navigate to the part of the application code where the logic signal...

koskos, Well, you seem to be on a parallel path, rarely speaking in full sentences, assuming others know exactly what you're talking about all the time, providing no real data preferring anecdotal information to actionable information, and misreading and misquoting most documentation.

Good day, You have provided very little in the way of actionable detail; for example, what is the time it takes for each turbine to reach FSNL from: a) Initiation of START command? b) Detection of flame? Factors affecting start-up timing can include, but are not limited to...

This is not a simple question, and it really depends on the types of devices the LVDTs are attached to. If you want details about frequency and voltage of LVDT circuits (excitation and feedback), please have a look at GEH-6721, Vol. II. You will need to know which I/O configuration is being...

Frame 3 two-shaft (MS-3002)

By the way, you must use a True AC RMS voltmeter to measure the LVDT output. Just any AC voltmeter won't do the trick, and even some models of very expensive Fluke calibrators are NOT accurate at measuring VRMS above 1 KHz, so check the specifications of the meter you are using carefully. You...

I'm trying very hard to understand how to tell you that you will get a much better, more concise, and faster response if you provide as much information as you can in your original post. All LVDTs are not the same. All applications of LVDTs are not the same. All control systems do not handle...

> 0,7 V is the traditional closed value described in the control specification > that GE uses for their Gas Turbines. The GE Control Specification usually lists <b>0.700 VAC RMS</b> as the "zero stroke" voltage setting for the LVDT feedback. Not 0.7 VDC. But we don't know what the...

farosham, How old is the Frame 6 at your site? If it's a newer unit, possibly under warranty, have you contacted the packager about the problem? There is usually a high turbine compartment temperature switch to alert conscious operators and technicians of a high turbine compartment...

Napster, I didn't ask if the CTD sensors were identical. The question asked if the CTD sensors were <b>installed</b> identically. I have very little experience with Circle-bar-W machines, but in other combustion turbines the sensors measuring axial compressor discharge temperature can be...

Are you 100% certain the sensors measuring the CTD are installed identically in both machines? Are you 100% certain the pressure transducers measuring the CPD of both units are calibrated identically? Are you 100% certain that the amount of air entering the compressors of both units is...

Linearity is the concern, but you haven't provided enough information to respond to your main question. First, I'm not familiar with measuring the output of an LVDT in VDC; so I can't comment on that. Second, what does the LVDT manufacturer's specifications say for the linear output range...

I think a lot would depend on the "capability" of the static starter in regards to how it can be operated or programmed to "synch" with the shaft speed/frequency in order to "catch" the unit as it was spinning down. I don't think a static starter can start a machine from zero speed; the ones...

'The Give The Man A Prize!' department? Ya gotta love the irony of the moderators! (Some of us love it, anyways!) You didn't say what kind of turbines these Mark VIs are controlling. Two divisions of GE, the former Nuovo Pignone (now known as GE Oil & Gas), as well as the former Alsthom...

Process Value, MANY steam turbine manufacturers employ separate bearing lubricating oil and hydraulic oil systems, each in its own tank. This is done in many cases because a special hydraulic oil is used to help reduce fires if the hydraulic oil were to accidentally be sprayed on the turbine...

Process Value, This unit is not like the GE-design Frame 5 heavy duty gas turbines you have so much experience with in the last two years. The original poster stated the unit at his site was a Frame 9FA. F-class machines employ "static starters", where the generator is temporarily converted...