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It's alarming the number of people reporting failed VCMI cards. It would be very helpful to know what the failure mode is. How are they failing? What is the indication they have failed? Is it power supply voltage spikes or grounds that seem to be causing these failures? It's difficult to...

Some character isn't "translating" correctly in the video reference (the one between view and t), so I can't see the video. Most of these ratchet mechanisms sort of "pulsed" during the forward stroke. They almost "hum", lightly then deeply, then lightly then deeply, continuously and very...

I've been watching this and other posts by this originator, and it's just not clear what capriconian is trying to do. As will be seen below, I don't how much I can really contribute--except to try to clarify a couple of things for everyone trying to help this originator, and maybe even the...

If you have dueling fuels, that's a problem all by itself. Heat rate is a "funny" calculation. I believe it's expressed in Btu/kw-h, so a lower number would mean that more energy is produced for the same fuel flow-rate, or less fuel is required for the same energy production rate. It's an...

Dharmesh, Your post is unclear. Yes; you can power-up a Mark VI TMR panel with only two of three processor racks and two of three VPROs in service. And, the HMI can establish communications with the panel with both CIMPLICITY and Toolbox. However, it will not be possible to achieve a...

BigTom209, How is the troubleshooting going? Can you tell us what you've found? Thanks.

> GE propose simplex, dual and TMR, which is the more suitable configuration for my application. < What is your application? What control system do you currently have? Are you considering any control systems from other vendors? If so, what are they or what have they proposed? The...

srl, Is there any update to this thread?

heryuda, In all the years I've worked on GE Speedtronic turbine control systems, I have never encountered a problem with the actuation of L60FSRH or L60FSRL. So, I've never really looked at the BBL. I don't have access to all my Mark V files at this time, but if either of these signals are...

You likely found this site using an Internet search engine (like Google or Bing or Yahoo or whatever they use in your part of the world). control.com has a 'Search' feature as well, though the search entry field is hard to find in a bar at the upper right corner of the page. When one uses...

Since droop speed control is proportional control, the proportional gains are changed depending on the characteristics of the prime mover.

Most newer units these days will use something (terribly inappropriately) called 'Constant Settable Droop' which factors load (MW) feedback into the equation. The equation used by the originator is straight proportional droop speed control. (Only the name is terribly inappropriate; the function...

I would ask: Is this a problem which just recently started? Is it a new application of this pick-up? Or, did it start recently? If so, what changed before the problem started? When you say a similar problem, does it involve using the same pick-up as the input for two control systems...

Thanks! This is good info, all of it.

rab, Reverse power relay settings are normally determined based on an analysis of the power system at the site, including the type of prime mover (a steam turbine in your case), auxiliary loading, transformer capabilities, and system (grid) capabilities. The alternator in use with your...

cww, OTS opposed optical sensor. Can you explain 'OTS' please and suggest a possible manufacturer/vendor and part number?

Surya, How do these transmitters maintain a positive differential on the manifold vs. combustor liner pressure? Some combustion modes do not have gas flowing through the manifold(s). Does a low dp activate purging somehow? Are these transmitters now part of this "compressorless...

1. The Speedtronic continually calculates many values of FSR simultaneously and then the Min Select function chooses the lowest of these values as the Fuel Stroke Reference which will control the fuel flow-rate. There is an ASCII text file on the operator interface in F:\UNIT1 called...

When did the problem start? It's presumed (because you didn't say so) that it was working fine and then this problem started. After a maintenance outage? I'm presuming the ratchet mechanism uses a self-sequencer, but you didn't say that. The self-sequencer controls the flow of oil to the...

What have you done to try to troubleshoot the problem? This is most certainly a controls problem, though, as the mechanical department can't conceive of a situation that would cause a high vibration to suddenly appear at a different place in a piece of equipment rotating at 5000+ RPM. Nope...