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Hello, So, would you please tell us what you understand droop speed control to be--what it does and how it does it? Just the basics--no load sharing, no isochronous just the basics of droop speed control. I'm looking for two answers, minimum--because droop speed control does many things, but...

Dear, You .... assume that all the instrumentation is identically calibrated, all the instrument tubing and isolation valves are identically clean and in the same positions, and that all Control Constants and I/O Configuration Constants are exactly identical, that all the internal clearances...

MG, Have you tried contacting your local Parker re-seller? Or the packager of the GE-design Frame 9E heavy duty gas turbine at your site?

suryapower, To expound on the 'Live and learn' statement. If, on some future maintenance outage, there is concern about performance increases after the outage versus before the outage an idea would be to shut the machine down a day or two before the outage, thoroughly clean the inlet and...

Have you looked at the Performance Correction Charts in the Operations and Service Manuals provided with the units? I don't recall ever seeing a chart for inlet pressure drop at a particular ambient, but the Belfort Bunch might be supplying them with their F-class units (or BHEL, as the case...

suryapower, Yeah; I had an extremely strong suspicion it was something exactly like this. It's not possible after the fact to separate them. Any time an Off-Line Compressor Water Wash is performed the IGVs and inlet bellmouth should be inspected before and after the procedure to determine...

suryapower, Both operations are essentially the same thing: cleaning the axial compressor (inlcuding the axial compressor inlet (IGVs and inlet bellmouth). Some cleaning of the IGVs and inlet bellmouth are accomplished with the Off-Line Compressor Water Washing, but if the IGVs and inlet...

glenmorangie and natgasman, I haven't had the pleasure of working with a 5002C, but if memory serves correctly from other two-shaft applications I have worked on FSRACC is related to the difference between THNAR (the Acceleration Speed Reference) and the actual Acceleration (TNHA). I don't...

Mustafa, The Mark VI and Mark VIe speed pick-up inputs are MUCH more sensitive than earlier Speedtronic turbine control systems' which required a smaller gap setting to read lower liquid fuel flow-rates during firing and acceleration. So, mechanical vibration of the flow divider toothed...

suryapower, It would be the same calculation methodology as for an off-line compressor water wash. You're quantifying the same parameters but only cleaning part of the axial compressor.

Where any of the LVDTs "calibrated" during the "routine preventive maintenance?" If so, has anyone compared the before- and after calibration values to determine if there are any discrepancies? What Process- and Diagnostic Alarms are present during acceleration and when the speed hangs? Is...

devgaur405, Thanks very much for the feedback. "Feedback is the most important contribution!"(c) here at control.com. Because many people read these threads--both now, and in the future--feedback lets people know what works and what doesn't. So, thanks again!

The Operations and Service Manuals provided by the packager of the unit and auxiliaries are always the best place for this kind of information. If the unit was packaged and provided by GE until a few years ago, then Vol. III is the place with all of the outage service information, forms, etc...

natgasman and glenmorangie, What's the status of this issue? Thanks!!!

Hello, >1. SFL1 Core Voter Mismatch SFL1, System Frequency Line 1 is a signal related to the frequency of the running (bus; grid) voltage. For some reason one or more of the processors of the Mark V doesn't sense the same line frequency as the others. Reasons can include poor ribbon cable...

cactus_chris, I believe the two problems are unrelated--other than they're both related to the fire protection system.... You should be able to visually observe the voltage-switching relays change state; older relays had the red LED to indicate when energized. A lot of the relays used for...

Hello, Rogerthat, After re-reading your post, you may be saying that your company has only acquired the generator, in which case all of the information below may not be applicable. There have been other posts on control.com about re-purposing generators at different frequencies; there is a...

Has100, MAOUT_Q.SRC is used to assign and scale existing signals (like DWATT & DVAR) to analog outputs of <C> (on CTBA terminal board). No changes/modifications to the CSP (Control Sequence Program) necessary. There are details for the scaling in the comments at the top of the file. What's...

anonymous, I haven't seen the most recent eOne gas analyzers. Do they monitor for CO2 and air as well as hydrogen? (That's why the portable gas analyzers were required with the hydrogen control panels provided for decades--because the analyzers on the panel were ONLY capable of monitoring...

Anonymous, Your Danger Ranger (Safety Manager/Supervisor) is going to pretty much INSIST you follow the GEK. I haven't read any hydrogen-related GE instruction manuals lately, and I will try to look up the reference doc's I always used back when I was field engineer. There used to be four...