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iii, The 'S' in SRV stands for STOP. The primary function of the SRV is to be the gas fuel stop valve. Next, another purpose of the SRV is to limit the pressure upstream of the GCV so that flow through the GCV is proportional to the opening ("stroke") of the valve. This is important when...

JFB, > V = 2pi * f * X In the formula you cited, I presume 'f' refers to the frequency, in Hz, or RPS (Revoltions per Second) of the rotating shaft? So, in other words: V = 2 * pi * (RPM/60) * X Where x = micrometers (displacement) and V = Velocity (mm/sec) Does there need to be...

EXCEPT IN VIBRATION MEASUREMENT!

Phil Corso, Yes, please.

vimal gupta, It would seem there are some new Diagnostic and Process Alarms since I've looked at Mark VIe (not surprising; GE is continually trying to improve reliability). What have you done to try to troubleshoot the two 'Ref. Voltage Out of Limit' Diagnostic Alarms? What does the...

Phil Corso, I don't generally object to the use of mathematical formulae (when it's spelled correctly, of course). I do object to allusions, incomplete, in-concise--albeit short--replies. Have at it--but please just be clear, concise, and complete. While being short and simple. We're not...

Phil Corso, Let's not ignore "the losses." What would be the difference in fuel flow-rates? And, let's start from an equal MVA, 0 MVar, holding fuel flow constant and then increase the MVar to 20 lagging MVar. What would happen to the fuel flow-rate? And the real power (MW)? And, then...

TF, The turbine control system, if it has enough I/O capacity, can control fuel treatment systems and other "balance of plant" systems required for turbine operation at some sites. ("Balance of plant" generally refers to the remainder of plant auxiliaries and controls other than the basic...

engr, You didn't say if the MVars of Generator B were leading or lagging.... I would be very interested to hear what you believe or have observed in regards to your question. Do you think that the fuel flow-rates for the two prime movers driving the generators in your scenario are equal...

Josh, There are many types of three-way valves with double-acting actuators for many different types of applications. Some applications require a lot of torque or pressure to move in one direction, and very little torque or pressure to move in the other direction. Some applications require...

Neo, Yes; I'm busy at this time, too, so I'm not devoting as much time to this as I'd like. Yes; you're next assignment is L3STCK3. 2) I've seen some usages of 'ltrue' that were NC, not only NO. It can be either. If it's NO, then the contacts will be closed (because 'ltrue' is always a...

Norm, Is this one of those Mark VIe upgrades of a Mark V that came with new and/or upgraded HMIs? You seem to be saying that in the past (how long ago?) the operator <b>was</b> able to change diffuser blower motors from at least one of the control room HMIs (pre-upgrade if the control...

Neo, I don't see much in the way of correction; the 'ltrue' still doesn't seem to have a contact (NO or NC). L4Y is not listed. The axial compressor bleed valves MUST be open prior to a start of the gas turbine, otherwise it's likely the unit will suffer extremely high vibrations as a...

Yes.

Skeptical Fred, All the Speedtronic panels can perform this, it's just a matter of how. The Mark IV and Mark V use fixed point math (there is a description of this in either the Mark V Maintenance Manual, GEH-5980, or the Mark V Application Manual, GEH-6195). The Mark VI and Mark VIe both use...

It's very difficult to comment specifically, but based on the information provided something is amiss and should be investigated and resolved. Operation in either "primary" or "secondary" (Lean-Lean) modes for extended periods of time is not recommended. As is prolonged operation in Extended...

Not usually. Depends on which Speedfronic and what the fault is and how resourceful one can be. But, based on the information provided: No.

meghla, I give up. Try this: http://www.wikipedia.org/wiki/Counter-electromotive_force Then, use your preferred Internet search engine to look up other relevant words terms. You should be able to find all the maths and vectors you need. I really hate to surrender defeat, but...

Johnplayers, If the IGVs are acting up why not just tell us what's happening--or not happening--and tell what troubleshooting you've done and what the results of that troubleshooting were???

Johnplayers, Without being able to see what's running in your Speedtronic panel I can't comment specifically. In the past, corrected speed was only used for fuel control. If you have a turbine with DLN combustors it's entirely possible the IGVs are being used for compressor protection--and...