Search results

abdi, It's really not possible to say for sure without a LOT more information. My first inclination would be that, if flame is being extinguished, then something is happening to cause the ignitors (spark plugs) to re-ignite the flame in the primary combustion zone. Again, you haven't told...

abdi, The usual reason is because the fuel to the primary combustion zone was NOT completely shut off. This typically happens when the LVDT calibration of the Gas Fuel Splitter Valve is not correct, or the valve has been refurbished and the stroke is not set correctly, or a combination of the...

abdi, You very simply have NOT provided enough information for us to be of any help to you at all. We can only presume that the turbine had DLN-I combustors, is firing on gas fuel, and that a HGPI was just completed. We don't know if the unit has Inlet Bleed Heat, if the IBH system was...

emelito, From your description the turbine experienced a 31 MW change in load--that kind of load swing "... in just a split second ..." is usually the result of either a loss of fuel (pressure and/or flow), OR a very large load swing and/or grid frequency change. If the fuel supply was...

4_20 mA, The answer to your question can be found on the Starting Means P&ID. I have never seen a GE-design Frame 9E with a turning gear--which I define as an AC motor-driven gear mechanism that rotates the shaft at a constant speed when on Cooldown. I've only seen ratchet mechanisms, and...

j_dubya, Were the SPCs working for some period of time, and they "recently" started experiencing problems? If so, how long did they run without problems and how long have they had the problems? If the problems "recently" started, was it after a maintanance outage? Or a lightning strike? Or...

CLNG, As we all know, troubleshooting can be--and often is--a logical process of elimination. What happens if you turn off the Mist Eliminator ven fan motor with the turbine running? Does the L.O. Tank pressure increase or decrease? Is the turbine L.O. used for seal oil on the...

CLNG, The likely cause of higher than normal pressure (above atmospheric) L.O. tank pressure is either (1) excessive Cooling & Sealing Air pressure in one or more of the bearings, and/or (2) problems with the L.O. Mist Eliminator(s). I have seen at least two L.O. Mist Eliminators that were...

Yes.

Have you read the Help topic on CMS? What didn't you understand about CMS after reading the Help topic?

M Zeesha Ahsen, Have a read of this thread: http://www.control.com/thread/1300219973 It pretty much explains, sort of, why this leak test is performed--and what can happen if it's not, or if the logic is forced to prevent the alarm/trip when one or both the gas valves leak. If you...

Larry Drake, How about a link to the proper .pdf file on the BFI Automation website for the Mark V-compatible flame scanner? That way anyone can download the cut-sheet at any time! Thanks,

Jeff Ladwig, Either the LVDT calibration is not correct, OR the servo null bias is not correct, OR the servo wiring (polarity) is not correct, OR some combination of all of the above.

CPD is used for BOTH Base Load and Peak Load temperature control. Peak Load occurs at a slightly higher firing temperature and CPD than Base Load. The exhaust temperature control "curves" for both Base Load and Peak Load represent constant firing temperatures (the temperature of the hot gases...

mhm, The exciter regulator ("controller") of the EX2100e is usually almost always the same equipment, but the type of exciter can vary greatly from generator to generator. Exciters, regardless of type, have the same requirements: to control the generator terminal voltage (ultimately) and in...

mhm, Typically, if a piece of rotating equipment has an electrical or electronic overspeed AND a mechanical overspeed mechanism, the electrical/electronic overspeed is configured to trip the equipment before the mechanical overspeed. Mechanical overspeed mechanisms ("bolts") are usually...

Larry, It can't be done. The Mark V was designed for use with Geiger-Mueller UV flame detectors which must be connected to the <P> PTBA and which require 335 VDC to operate and which produce a frequency proportional to flame intensity. When GE wanted to use 4-20 mA Flame Trakkers it was...

nayan.sharif, Is it not possible to physically measure the distance from the bottom of the L.O. Tank to the underside (the bottom) of the top of the L.O. Tank? GE Belfort have been changing a LOT of dimensions and practices that have been static for decades, so it's <b>NOT</b> safe to...

You have a Frame <b>6B</b> with a Mark <b>VIe</b> turbine control system. As you indicated, it's <b>NOT</b> typical for these many components to "fail"--and it's not clear that they did fail (from the information provided). When you say you followed the OEM's "instructions" for...

nayan.sharif, The real problem is: Why <b>ISN'T</b> the Control Room ready?! Why wasn't someone tasked with ensuring this critical part of the plant was "on schedule" and ready for initial operation of the turbine? The GE HMI, while technically necessary to send commands to and monitor the...