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Irfan, Please don't think that any power that comes from the Mark V (or any Speedtronic) makes a set of contacts wet. If you disconnect any pressure switch or temperature switch from the Mark V's contact input terminal board and connect a load to one of the contacts of the switch nothing will...

Wajid29. While we're waiting for <b>MIKEVI</b> to respond, have you confirmed that the Alarm Window setup is correct for new HMI? Could someone have fiddled with the default setup for the Alarm Window causing it not so show alarms and events from the unit? You haven't told us if there is...

Controlquest, Have you looked in the Operation and Maintenance Manual System Description section for Fuel Purge and/or Liquid Fuel to see if there's anything written there about the equipment? Can you post a scanned image of the Liquid Fuel Purge P&ID to a webhosting site (such as...

Alishokrani, > do you have any practical example(s) in GE gas turbine for dry contact? Can you tell us what version of Speedtronic turbine control panel you are working with? Dry contacts of discrete outputs of Speedtronic turbine control panels are used for starting/stopping motors...

Sundar2015, Either there's a wiring error, or the sensors detected smoke, UV and/or temperature sufficient to warrant activation. Are you absolutely certain there are no leaks of lube oil or hydraulic oil or fuel oil in the compartment which may have been exposed to sufficient temperature to...

Irfan, What does the manufacturer's Instruction/Application Manual say the jumpers are to be used for?

The C-form set of contacts depicted below is voltage-free, or "dry." They can be associated with a relay, a temperature switch, a limit switch, a pressure switch, a pushbutton, etc. The concept is that at the terminals (represented by the "0" character, there is NO voltage present.<pre>...

Many applications use unshielded compensation wires/cables. The difference is that these wires/cables are properly isolated from high-voltage/high-current wires/cables that WILL cause induced voltages in nearby wires/cables. Even if a wire/cables is properly shielded, if it's run in close...

The bleed valves should be open during shutdown and start-up for surge/stall protection. The turbine output is low when any bleed valve is open during loaded operation, which means also that the efficiency is low, so you're getting less power for the same or slightly higher fuel flow-rate. If...

Maythem, The Speedtronic community here at control.com has been going strong for over 12 years. There is a good deal of information about LVDT calibration which has been written over the years--and it's all available via the cleverly-hidden 'Search' feature on the far right side of the Menu...

Dear Ashraf and MIKEVI, Based on the information provided, the problems started approximately six months after an HGPI during which 24K extender hardware was installed AND when the ambient temperature started reaching approximately 115 deg F. It is hoped that spark intensity was observed...

samson16, Your best, and simplest, solution is to use Acronis TrueImage software to "ghost" the entire hard drive to optical media (CD; DVD) in a bootable format. This has been covered in several previous threads in control.com. (There is a 'Search' field cleverly hidden at the far right edge...

Jose Orlando Rodriguez, Depending on the diameters of the bull- and pinion gears, and the width of the gear teeth, it's virtually impossible to say for sure how many teeth are on the gears. This question is probably best answered by the manufacturer. Perhaps if you took a picture of the...

Owais, How long has this problem been occurring? Since commissioning of the new contro system? Some time after the new contro system was commissioned? You stated, "... For last 1 year for every start-up it rotate under 48% speed of NHP." Was this before, or after, the contro system...

ARI1969, "... parts failure severity rate will be high, ..." That's certainly conclusive, isn't it? (NOT!) Actually, I don't believe there is a Simple Cycle Mode and a Combined Cycle Mode for DLN-I combustor-equipped turbines. The IGVs are modulated all the time to control the air flow...

VKGUPTA, How long has this problem been persisting? What are the exhaust temperature spreads when this problem is occurring? What fuel is being burned when this problem is occurring? It could be that there is, in fact, an unstable flame in this particular combustor which is causing...

VKGUPTA, >Emergency stop contact inverted action is happening on low >voltage dip in Mark-Vie during this momentary time limit >(Physical emergency push button contact is ok). I don't have a copy of GEH-6721 to refer to at this writing, but you would do well to look at the circuit...

Thettin, Where did you read this description "...for a single effective speed..."? In the Toolbox or ToolboxST longname description? In the Control Specification, Sect. 09.nn.nn? What makes you question the description? Is there nuisance or suspected erroneous vibration alarms/trips...

I thought this was familiar, and on researching the control.com archives I can see this has been discussed previously. Is the application code in the Mark VIe "exercising" the Emer. L.O. Pump on every START? And is the Mark VIe experiencing problems when there is a momentary (200-400...

mhwest, The "other" OEM has also been experimenting with eliminating flame detectors on their turbines. :^) And, I mentioned as much, as you quoted--work is being done on this. I just said the concept as stated by the original poster was not a good idea; I should have probably said it was...