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gustavo_marcelo, >1. Is it necessary to do the correction? What if we do not >use the corrected value but use the actual instead? GE believes it is necessary. See Kevingst's reply below; it is very good. >2. What does "bias" means as above statement? People always >said applying bias...

gustavo_marcelo, >Why do we named the lube oil pump as Pre and Post >(pre-post)? Is there any significant reason of such naming. Can you be more specific? (Frame size (3; 5; 6B: 6FA; 7B; 7E; 7EA; 9E; 9FA; etc.); packager (GE USA; GE Firenze; GE Belfort: or BHEL, or John Brown, etc.)...

jagriti, Let's list most (I don't have a comprehensive list of every P&ID for every turbine): L.O. Hydraulic Oil Trip Oil (sometimes called Control Oil) IGV Fuel Gas Liquid Fuel Liquid Fuel Forwarding (if provided by the turbine packager) Fuel Purge (if the unit burns more than one...

yawadu, >How is generator manually synchronized onto a live bus. Nothing like a simple question. Prior to synchronization, the generator needs to be at or very near rated speed, because speed and frequency of the generator output are directly related. Prior to synchronization, the...

>I want to know the small passing can be reach 42 barA within 74 msec? Yes. Depends on how "small" the passing is, and how large or small the area where the pressure transmitter is measuring the pressure. You mentioned a two-inch diameter pipe??? It doesn't seem like a small leak...

It seems what you are trying to describe is what's called a "double block and bleed valve" arrangement. This is used to provide two shut-off valves for redundancy. There is often a pressure switch or a pressure transmitter to Messer the pressure BETWEEN the two shot-off valves--to detect leakage...

It seems what you are trying to describe is what's called a "double block and bleed valve" arrangement. This is used to provide two shut-off valves for redundancy. There is often a pressure switch or a pressure transmitter to Messer the pressure BETWEEN the two shot-off valves--to detect leakage...

jagriti, Which parameters to pay the most attention to ....? Let's address the issue of the 'log sheet' first. The purpose of log sheets is to be able to spot a trend. A trend is an increase or decrease in the value of a parameter over time. The time period could be an hour, it could be...

I presume you are referring to the Microsoft Windows Internet Explorer-based Historical Alarm & Event Log viewer that starts when the user clicks on the icon for MS Windows Internet Explorer? Has it ever worked? Meaning, did it work for a while and then stopped working?

So, what you <b>really</b> want to know is: how does a control system work? Because a Mark VIe turbine control system is just like many other programmable control systems in many respects. It just so happens that the Mark* series of turbine control systems were developed primarily to operate and...

>I mean igniter work each second and make spark in turbine operation. The English language can be very imprecise. You have identified one instance of it: referring to a gas turbine engine ignitor as a spark plug. Calling a gas turbine engine ignitor a spark plug implies it operates like the...

Most Mark VIe turbine control systems use electromechanical relay output contacts to start and stop all auxiliary motors, including the DC Emergency L.O. Pump motor and the hydraulic ratchet Kemp motor. But, somehow, I don't think that's quite what you are asking.... Each motor has its own motor...

>Will it effect unit safety or operation capability even we >know this fluctuation is due to weather effects? Yes. These transmitters are basically there to ensure there is ventilation air flowing so that if there are fuel leaks the concentration of combustible vapours will not be high...

This is a pretty big question. And, for your machine at your site you should be consulting the programming in the turbine control system for exact details. The Aux. L.O. Pump and motor is used during: --Cooldown (Hydraulic Ratchet; or, Turning Gear) --Starting and Acceleration to...

AshitoshMehndiratta, Without being able to see the application code running in the Mark VIe at your site it is impossible to say with any degree of certainty what happened and why. In general there is usually a contact from a tie breaker (a breaker that connects ("ties") the generator to a...

Sanjay Mallik, The alarm is (or should be) "MASTER PROTECTIVE START-UP LOCKOUT". This is a technical forum. It helps if you can be specific, instead of just listing what is felt is the "important" part of the Process Alarm message text. If I recall correctly, "MASTER PROTECTIVE START-UP...

Bocajun, This is a question best asked of the turbine manufacturer, as they would have the best knowledge of the positives and negatives (pros and cons) of running the jacking oil pump while the shaft is spinning and producing torque. I don't know how much lift the jacking oil pump...

sanjay mallik, So, when the turbine control system was upgrade from [Mark* ?] to Mark* VIe you say the flame detector was modified. Mark VIe turbine control systems are capable of powering <b>335</b> VDC and 4-20 mA flame sensors (the former are UV type and the latter are usually Sic type)...

>Flame sensor is UV and is not water cooled, then what might >be the source of moisture and water? kindly give some view. Ambient air is drawn into the axial compressor and flows through the turbine and exhaust. As was previously written, if the unit has some kind of inlet air cooling, and...

This is NOT a Mark VIe problem. This is a temperature/airborne moisture (humidity) condensation problem. And, if the flame sensors have throttling valves to adjust the flow of cooling water to the sensor cooling water jackets then it's also a mis-adjustment problem (mis-adjustment of the...