Search results

Tom kinczel, Previously, did you not have to manually adjust voltage when switching voltage outputs? When did this problem start? Can you provide any information about the generator and AVR (manufacturer, model number, etc.)?

As in the previous reply, purge air is used to push out any combustible gases (vapours) in the fuel nozzle, for cooling the fuel nozzles, AND to prevent backflow of hot combustion gases into the fuel nozzles and manifolds which can result in circulating hot combustion gases between combustors...

Chiranjeevi, I would have to see the relevant P&ID to comment; there have been several different schemes employed over the years--all similar, but slightly different.

VKGUPTA, Thanks for the feedback! Please do let us know what you find as you work to solve this problem.

Wesley, Thank you very much for the feedback! We look forward to hearing what you discover as you search for the root cause for this problem, too.

What is it that you need ToolboxST for? How many turbines and HMIs are on the full ToolboxST project file? SOME HMIs have ToolboxST installed on them but if the "Master" ToolboxST project file can't be accessed then the local HMI could be used to upload the ToolboxST configuration from the...

VKGUPTA, The Subject line of this thread states a gradual drop in pressures, but there are not details in the post about how long this drop in pressure has been going on. A week? A month? Three months? The Main L.O. Pump is generally a positive displacement pump inside the Accessory Gear...

Chiranjeevi, While you're plotting DWATT and CTIM, also plot CPD, TTXM and TTRX. You can set the plot to record at the slowest possible rate (I forget what that is for Trend Recorder, or Trender) because you don't need high resolution (which will consume a lot of hard drive space). You can...

Chiranjeevi, When producing power at rated frequency, the axial compressor (of a single-shaft heavy duty gas turbine) is running at a constant speed. When producing power while operating at Base Load (CPR- or CPD-biased exhaust temperature control) the IGVs are at maximum operating angle...

SP, Have you looked in the unit Operations & Service Manuals, in the Liquid Fuel section, to see if there's any information there about the off-base L.O. skid for the liquid fuel pump? And, possibly what the purpose of 20QA-2 is? Also, could it be that one possible reason for the off-base...

SP, Thank you for your answers. I didn't mean to imply that I was going to be contacting BHEL about this issue. I was just stating that if the problem were at my site I would be taking the three actions I mentioned. Certainly, BHEL, as the "designer" of this skid, would be the best...

sami ibrahim, We are very distressed to hear about the starting reliability problem with your 1 MW diesel engine. What have you done to investigate the problem? What have you done to try to resolve the problem--and, more importantly, what were the results of your efforts? How old is...

SP, All GE-design Frame 5 machines, and their look-alikes, are not identical. Many GE-design Frame 5 heavy duty gas turbines were packaged by many different companies over several decades, and the auxiliaries were quite often different--but provided the required functionality to control and...

Sandeep_ecengineer, What kind of "solid" is being run through the Cone-crusher? There are different switches which work better for different materials. Is the cone-crusher producing material of the proper size? Is the process which uses the output of the cone-crusher subject to frequent...

CPD is SO critical to DLN control that the unit cannot be operated safely and without damage that the protection trips on low CPD readings. Possible causes for low CPD readings are plugged sensing lines, manual isolation valves not fully opened after off-line compressor water washes and...

>I have read in other topics in this forum that raising or >lowering the preset energy may lead to LEAN LEAN EXTENDED >I did not understand how this gets? Extended Lean-Lean mode occurs when something causes the fuel in the primary combustion zone of the combustion liners to be ignited...

It sure seems, from the information provided, that when the DECS is transferred to PF control that it is not seeing the reactive current change--the signal from the CTs, usually. AND, we know the PF is going very low--but we DON'T KNOW if it's going in the LEADING or LAGGING direction. (I...

>"Is this a danger to the machine?" >Yes=short answer. So, GE says that every hour of operation in Extended Lean-Lean is equivalent to six to ten hours of operation in Premix Steady State Combustion mode--that's how much more stressful it is on the combustion liners. Extended Lean-Lean is...

You have most likely answered your own question: >...., it must be noted that this action was >only observed after conducting some repairs to the unit >approximately 1 year ago. What, exactly was the work done approximately 1 year ago? Why were the repairs necessary? It would appear...

C^2, The above descriptions are not intended to be 100% complete--the topic is too big and there are too many signals to cover precisely how each one is handled in detail. We can always discuss individual signals if necessary. As for being relative to Mark V or Mark VI, the original poster...