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Well, this is indeed more interesting all the time. The alarms you listed are not Diagnostic Alarms, but Process Alarms, generated from blocks in the CSP. Are there any Diagnostic Alarms active at the time of these Process Alarms, or that come and go more or less with the timing of these...

I've been reading, re-reading, and re-reading the initial post; watching the other responses; and then reading and re-reading and re-reading the original post again. Without the ability to see the P&IDs for these machines and the application code in the Mark VI it's very difficult to say for...

"...Exhaust gas conveyor..." Interesting translation of 'radiation shield'. Most GE-design heavy duty gas turbines use a radiation shield which is a length of pipe that protrudes axially into the exhaust area with a small "tee" which is open at both ends radially to the exhaust diffuser...

Hello, Interesting problem, made all the more interesting because you say it happens for all six turbines on the site. Please post the relevant sections from F:\UNITn\IO.ASG for one of the units. It's presumed the sections will be the same for all units; please verify they are the same for...

Namatimangan08, Indeed, it is possible to have a control system that capably handles both primary and secondary frequency response "simultaneously". The question was whether or not a GE Speedtronic Mark VI had a 0-150 mHz deadband.

The LVDT feedback was added because the designers felt it would be necessary for stability. Empirical data over a couple of decades revealed LVDT feedback wasn't necessary for stability. (Note that most GE-design Frame 5 and Frame 6B heavy duty gas turbines do not use LVDT feedback from the...

Namatimangan08, You make a lot of assumptions (and I edited my posting in anticipation of being edited or even rejected). Every governor is not NOT configured or programmed to operate in the same way or to achieve the same purpose. Every prime mover does not have secondary frequency...

>PLz enlighten. You've posted this question here before, though you did not indicate what fuel you were burning at that time. What part of the previous responses were you not clear about or were unhappy with? And you were asked why you felt the Main Atomizing Air Compressor had failed...

When you write about a problem, please remember that you work daily (or something like that) with the unit at your site and its configuration, but we do not. We don't know anything about the unit you work with, what kind of Speedtronic control system it has, what kind of fuel(s) it burns, what...

>i face nearly the same problem,during >shutdown at TNH=80% THE UNIT TRIP(LOSS OF >FLAME). The same problem as what? Yellow smoke? >THE QUESTION: >IS THERE A RELATION BETWEEN TWO ALARM: >(LOSS OF FLAME) DURING SHUTDOWN AND >(FAILURE TO IGNITE) DURING START UP. It seems, Kahlid, you...

I have no idea what either of you are trying to say. Absolutely none.

All of the IDOS commands can be found in G:\EXEC. Commands are filenames which have a .EXE filename extension. If you type a command name followed by a space and /?, for example:<pre> VIEW1 /?</pre> and then press 'Enter' you will be presented with a "Help" screen that provides a help...

What Control Constant are you referring to?

Well, the new machine you will be working on should be provided with P&IDs (Piping Schematic drawings, in GE-speak) which would greatly help you in understanding the differences between the machines. Essentially, the machine you were working on had a conventional combustion system, with a...

george, What kind of "parts" is you lookin' fer? Does you wont controls parts, or turbin' parts, or cooling water pump parts, or eksiter parts? If you have a lot of money, you can always get parts from GE, at GE Parts Edge (use your preferred Internet search engine to find the link)...

Aliya, You may be making this more complicated than it is. I would add to otised's explanation that the pull-in current is higher because of the need to open or close the valve the solenoid is operating against high pressure differentials (across the valve). Once the valve is opened or...

There's also another option, using a current-sensing relay on one or more of the motor leads. These relays have a discrete output that could be seriesed with the command to run the motor, so that if the current dropped below a minimum value while the motor was being commanded to run a logic...

I once saw a very ingenious use of a proximity switch and a hinged lock hasp for this very purpose (I'm presuming this is a tube-axial fan blowing into the turbine compartment). The switch-and-hasp were mounted on a plate that was placed in than discharge air-flow. The longer portion of the...

It would be helpful to know when this problem started. Such as after some card was replaced, or after some maintenance outage (say, when the Mark V was powered-down for some time and then power was re-applied and the alarm started at that time or shortly after that). It's been said many times...

You can say or believe whatever you want about the presence (or absence) of air in the liquid fuel supply piping. It's the primary cause of hunting, and, again--sometimes it's very difficult to remove air from piping which was improperly designed or installed until the liquid fuel flow-rate gets...