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Lest anyone think I’m trying to sell fuel control valves for Woodward—think again. I’m not a fan of the design or quality. They do honor there warranties.

Isulamu, Thanks very much for the responses to most of the questions; it's nice to get responses to questions....! Very sorry to hear Woodward is not responding to the requests for information. I have seen this before with other vendors to GE; they seem to think they will violate some...

Isulamu, Hmmm..... So, I believe the SRV/GCV ControlsGuy25 is referring to is the decades old and proven combined SRV/GCV assembly, with one SRV and one GCV in one cast steel housing. When GE purchased the turbine controls retrofit business from Woodward they agreed to buy X dollars of...

By the way, I would gladly admit I was wrong if you wrote back to say the control system was actually the problem after working on the valve/actuator, but based on the information provided I’m pretty confident that’s not going to happen (that the control system is found to be the problem)...

The concept of IBH has been written about extensively before in several threads on Control.com. One of the great things about Control.com is that prior threads can be read by using the ’Search’ feature at the top of every Control.com webpage. If you want to understand what IBH does (which you...

www.engineeringdebt.com Hmmmmm…..

I have seen the printed circuit card ribbon connector receptacle pins severely bent, but I have NEVER seen a ribbon connector receptacle with different spacing between the pins. There just aren't that many connector receptacles on the PTBA, and the majority of them are for higher current...

MRasool, TANSTAAFL, which translates to "There Ain't No Such Thing As A Free Lunch" Combustion turbines are mass flow machines--meaning that the total mass flow through the turbine (axial compressor discharge AND fuel flow) are both important variables in how much power the machine produces...

Prior to the Mark V as we know it GE Salem had invested a LOT of time and money in a turbine control system operator interface that was based on DEC (Digital Equipment Corporation) VAX using the VMS operating system. For a few years during Mark IV production and even for a brief time during...

mahad83, You are using words and terms not usually associated with ToolboxST functions. (Restoring is not usually used in conjunction with forcing. As ControlsGuy25 said, un forcing is probably the correct word for what you are trying to do.) When forcing a signal the user usually has to...

doshevire, You must really like a challenge—or you are new on the job and someone is testing your ambition and drive. Or, someone doesn’t like you. A Mark V operator interface running IDOS (GE’s proprietary disk-based operating system for Mark V turbine control systems) is called <I>, and they...

mahad83, I rarely need to force any signals in a Mark* turbine control system or DCS, but it’s possible to force logic signals (which drive contacts in the application code) and analog signals (such as thermocouple inputs or 4-20 mA outputs, etc.). It’s been so long since I forced an analog...

glenmorangie, This is an “interesting” post. Go to eennow.com …. Very odd website and wording. I think I’ve heard of this Duane Schumacher before….

Thank you, Phil Corso, for addressing that concern of the original poster.

Yeah, well, most original posters these days are not interested in supplying any actionable data such as operating values or alarm lists. They just want to know what to do to fix their problem—plain and simple. It would be interesting and informative to know how the generator insulation was...

ARV1992, You didn’t answer the question about a power- and/or frequency management system that might be sending signals to the governors (and possibly the excitation systems) OR the governor mode of the affected gen-set…. ALSO, a lot of acronyms are not widely used in different industries. If...

A generator-set will trip on reverse power when the amount of power (torque) being supplied to the generator is not sufficient to “push” real current to the grid or system to which the gen-set is synchronized OR if there is a gen-set on the grid or system to which the gen-set is synchronized can...

var.i, A couple of colleagues have written me to let me know, in their opinion, I didn’t answer your “question.” In my opinion, your question is very unclear. Do you mean when the bleed valve doesn’t close and remain closed when it should be closed? OR, did you mean when bleed valve doesn’t...

Var.i, Most axial compressor bleed valves are designed to fail in the open position/condition to protect the machine. This means the valve actuator must have a force applied to it to close the valve and keep the valve closed. Many actuators use compressed air to close the compressor bleed valve...

It's doubtful GE will release "circuit drawings" for Mark VIe hardware any time before the end of life for Mark VIe is announced and has passed. If past history is any indication. GE is really, Really, REALLY big into proprietary and confidential information for its turbine control systems...