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Have you looked at the Lube Oil system P&ID (Schematic Piping Diagram)? Before the introduction of the L.O. Mist Eliminator the L.O. Tank was vented to atmosphere. This meant that L.O. vapours were vented to atmosphere. Sometimes the vent pipe was run to the top of the exhaust duct (on a...

Mohamed Salem, <b>When did this problem start?</b> Have you consulted with the OEM/packager about this problem? <b>When was the last time the unit was tuned for emissions?</b> Before the most recent maintenance outage (CI; HGPI; Major Inspection)? Or after the most recent maintenance...

dsp_guy, > Is it possible to have a <b>flow</b> of <i>Reactive <b>power</b></i> when active power is Constant? I'm not going to respond to the flow component nor the reactive power statement (see below). I will respond by saying that the VAr component of an AC machine is not entirely a...

> <b>We believe</b> that the turbine should have continued running on FSNL under this scenario. Without a LOT more information about the load the Isochronous unit was carrying and the nature of the load (stable; large loads starting/stopping normally; etc.) and what load the Droop machine was...

Yes; trying to run a DLN 2.n combustor-equipped machine without a working IGV actuator, or worse--trying to run by forcing IGV references--is pretty much just begging for compressor and/or combustor problems. The forces at work on the IGVs when the axial compressor is spinning at rated speed...

A2A, Thanks for the update! "Feedback is the most important contribution!"(c) as it makes the threads valuable to others for a long time after a single problem is solved for the original poster. I have seen cases where the o-rings of the servo-valve were not properly fitted and which...

Abdou, Many thanks for the update!

Peter Clarke, If you have just made this application code modification in response to a TIL, comparing this to other similar units might not be an apples-to-apples comparison. You said the "protection" logic is enabled at flame detection. That's when AA pressure is pretty low, especially...

Ummmm... What was done prior to this situation? Was someone attempting to upgrade ToolboxST? Was someone attempting to upgrade to a newer version of ToolbxST, or upgrade some Mark VIe component, without understanding the process (there is precious little written about the process of...

I would suggest you consult some texts and/or electrical reference materials about the relationship between synchronous machine terminal voltage and power factor. In the meantime, you likely already know that excitation is directly proportion to terminal voltage on a synchronous machine...

Phil Corso, The thread (the link is actually: http://control.com/thread/1026226787) was solved when the damaged liquid fuel pump clutch was replaced. This thread is for a Frame 6FA burning gas fuel, so there would be no liquid fuel pump requiring a clutch. The referenced thread does...

You can simulate flow using a frequency generator connected in parallel to each of the liquid fuel flow divider speed pick-up inputs (after disconnecting the inputs so as to not excessively load the frequency generator output). I've never tried this with speed pick-up inputs but since you say...

Ohhh, this should/could be fun! I don't believe an incorrect null bias would result in load instability. Do you, HFGTF&AGUY, want to provide a step-by-step procedure for adjusting null bias current, please? Tell us how to begin the procedure (what should the null bias value be at the start...

You are exactly, positively, 1000% correct. The purpose of allowing the turbine to continue to run when there is a ground is to improve the reliability and availability of the turbine. However, leaving grounds unresolved is just asking for more, and worse, trouble. The Speedtronic can easily...

What does the manufacturer's fine manual say for calibration?

Sam, It was not very clear from the original post which was the high tap and the low tap and which transmitter ports were connected to which taps. Yes; I could have been a little clearer, and probably should have been. The high tap should be above the maximum expected oil level, and as Roy...

If this were the case, the GT output would be down. Not very likely.

A2A, Usually one can see from the calibration screens if there is one servo with reverse polarity; it's pretty obvious because it will cause one or both of the other servo currents to be well off normal and usually causes a larger error between reference and actual (feedback). You said you...

The second-, third- and fourth alarms from the top of the list you provided indicate that one of the TCEA (<P> Core protective processors) was already trying to trip the turbine because it thought there was an HP overspeed. And, if the total DC supply voltage is only 90 VDC then that is at...

To all reading this post, <b><i>THIS</i> is how to present a problem to control.com!!!</b> Tell us when the problem started, what's been done to troubleshoot the problem, and what the results of the troubleshooting are! A2A, you didn't mention checking servo current polarity--which should be...