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HoltW, All gas turbines are not alike, not even all GE-design gas turbines--be they heavy duty or aero-derivative. And, when it comes to the differences between F-class (including FA and FB) and B/E-class units (the original workhorses of the GE fleet of heavy duty gas turbines) they (the...

Skjetaswi, You don't seem to understand. It's pphysically impossible for a single synchronous unit synchronized to (operating in parallel with) other synchronous units to operate at a speed that is anything other than the speed that is proportional to the frequency of the system. Full stop...

yawadu, Yes. The limiting factor is L.O. Bearing Header temperature. The temperature should not exceed 175 deg F--if at all possible. The purpose of turning gear is to keep the axial compressor shaft from warping (bowing) when the turbine has been tripped from load or shut down when the rotor...

usabas1, For a TMR, lift the magnetic speed pick up input wires at <R>, <S> & <T> QTBA- & - and PTBA-1 &-2, and -5 & -6 and -9 & -10 (on the<P> core). Run jumpers between <R>, <S> & <T> QTBA- and PTBA-1, --5 & -9; and between <R>, <S> & <T> QTBA- and PTBA-2, -6 & --10. Connect a frequency...

Usually, a digital output refers to some kind of "encoded" output which has to be "interpreted" or "read" or "deciphered" by some device in order to produce an output which can be expressed in some terms like voltage or current or engineering units on some display. Examples of digital outputs...

HoltW, GE designs and manufactures many different gas turbines, which fall into two basic groups: heavy duty gas turbine and aero-derivative gas turbines (aircraft engine gas generators with power turbines attached for land-based applications). Both some kind of "bleed valve" but they can take...

Yes. All solenoids share a common voltage, -125 VDC, usually identified as wire number (108). That is normal. Using a single wire for a common voltage and jumpering it to multiple devices reduces the number of wires required. Electrically, it's exactly the same as using, in this case, three...

jagriti, I can see apparently we are going to have to do this the harder way. But, first, do you have access to the electronic version of the manuals? It is unforgivable that Operations Supervisors and Plant Managers withhold access to Operations and Maintenance Manuals from anyone in the...

jagriti, The new unit should have been delivered with manuals, and in those manuals you should be able to find descriptions of each of the systems for which there is a P&ID. There is usually a tab in the manuals for each system, and that's more than likely where you found the P&ID...

It's presumed that this problem is "new" and has not always been occurring. If so, the quest is to or should be to discover what has changed and is causing this problem--the drop in power factor. Is it possible that the generator exciter (the "AVR," the "voltage regulator") is not working...

Sktejaswi, It's virtually impossible for what you say is happening to happen. When a synchronous generator is synchronized with other generators on a grid of any size the speeds of all the generators are fixed by the grid frequency. Frequency and speed are directly related by the formula...

jagriti, The drawing you attached is an attempt at showing the relative locations of control devices on the gas turbine. The version you provided also refers to the GB (Load, or Reduction, Gear Box and the Generator). It's only intended to demonstrate the relative positions (locations) of some...

engr.salman58, So, this thread is about GE DLN-I combustion principles. As I know, HSD (High Speed Distillate; Diesel Fuel; #2 Distillate; etc) does not burn in Premix flame in a DLN-I combustor. It's pure diffusion flame. So, the hotter the calculated flame temperature (because that's what...

sabak149, Depending on who you ask, EVERY conductor (core) is a signal cable, so it should be acceptable to run just about every cable together in any wireway--cable tray, conduit, cable vault, cable raceway, cable pit, etc. It's really the switching of signals (low-voltage--that is, less than...

Holykell, Do ya got any manufacturer names and model numbers for your "question"? To my way of thinking, a water level sensor is just that: a means of measuring the level of water in some container or tank. A water level data logger is a means of recording the water level in some container or...

alimighat, As glenmorangie states, your machine is getting old (not just kind of old; old). And, as glenmorangie has also stated you need to understand--and explain to others you are asking for assistance--how your machine has been and/or is being and/or will be operated so you can get the best...

Sir, You know, my watch stopped working last week. The buttons still worked but it doesn't seem to be keeping time correctly. What could be the problem, please? You just posed a similar question--with almost no data about how you performed the test and what the results were and what you have...

turbomanGTG, Nothing like a simple question to start the day.... You are likely asking this question because GE or Baker Hughes is trying to scare you into “upgrading” a Mark V to a Mark VIe compatible system because GE or Baker Hughes no longer supports the Mark V and considers the Mark V to...

Holykell, You have written and asked about many different types of industrial sensors. The BEST source of that type of information is from manufacturer data sheets, advertisements and websites (manufacturer websites, as well as industrial sales (manufacturers' representatives)). Another...

Jolek, I think most B/E-class GE-design heavy duty gas turbines have the third-stage aft wheelspace thermocouple entering the third stage aft area through tubes on either side of the #2 bearing, in the exhaust. I don't recall seeing the designations stamped anywhere, but they may be. As...