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When about to start unit, start permissive was missing due to servo suicided. Checked wiring, calibration, replaced servo pack and all were good ,but the alarm not get reset (servo suicide check). Keep looking servo reset in the HMI too (which available in few site in the overview screen). To...

Hi All, I been control.com member since long years ago. I am keep reading turbine controls stuffs, and it benefited in many ways to gain knowledge and helped to join GE / Fieldcore as a Control TA. In this time I would like to extend my heart full thanks to CSA, site moderators and other...

Dear members, Has any site using micro switch for the compressor air bleed valve? Is yes please share the details. Our limit switches are frequently failing due to high temperature. Unit:GE Frame 9E, Control system: Mark V Take care, g.rajesh

Recently after studying Mark VIe feeling it is more easier to work than Mark V, is it like that? The following are the difference noticed in Mark VIe, 1. ARCNET upgraded to 100 MB Ethernet for both I/O network 2. It can communicate directley to R,S & T 3. Using Toolbox ST 4. Can be...

Dears, Recently one of our GE-9E unit gas flow totalized counter started reading negative while unit is running. Since historian was fetching correct data, we identified problem could be with HMI graphics. After we changed the particular counter properties as real from integer started reading...

Dear All, What are the all possible reason for less CPD? In one of our Frame-9E machine CPD is 0.3 bar less than other similar GT. We are planning to inspect the below at available chance 1. IGV position 2. CPD transmitter calibration 3. Filter house inspection 4. Bleed valve...

In our GE Frame-6B & 9E machines compressor bleed valves are having the limit switches to indicate the valve position. In frame-9E we are receiving bleed valve trip from the top two bleed valve limit switches due to faulty switches. It is suspecting that temperature affect the switches as bottom...

Hello everyone, Can we use the thermocouple cable for signal about 15 meter distance? We understood thermocouple cable characteristics are different than normal copper wire. We are planning to connect servo valves, LVDT's, few pressure transmitters signal (4-20 mA) to thermocouple...

Few days back one of our Frame-9E machine tripped on loss of flame. Before trip, flame # 3 & 4 were reading 0 count. We have noticed flame detector # 4 cable damaged, it was replaced along with new flame detector. TCEA card replaced as 330 V from Mark V was missing. Now unit is running normal...

Dears, We had an issues with exhaust temperature high spread for one of our Fr-9E machines. Unit was running with normal spread around 12 deg.C with gas fuel operation. after unit transferred to liquid fuel due to gas low, temperature spread was increased to 24 deg.C. when unit was...

Dears, Since one pressure transmitter contact at <C> damaged. it relocated to good one and IO.ASS and IOCFG has been modified. After done MarkV make, user file has been downloaded to <C>. But after that <C> not reaching A7, staying at A6 and showing IOCFG failed. Please advise us Thank...

Dears, What could be the best practice to stop the GE Frame-9E machine while on 100% load (100 MW)? The reason we are asking that, grid control room are asked us to stop the machine immediately when they feel not necessary. As of now we are going for unloading at 10 MW interval and once...

Good day!! If air inlet greater than the alarm limit (180 mmH2O), what precaution should be taken? Will it advisable to force the automatic shutdown logic L63TFH to zero? There is no difference in CPD. Take care G.Rajesh

Dears, What would be the safe minimum load when unit on "ISO" mode? Thank you G.Rajesh

Dear team members, Would it be good practice if GT unit is placed on continuous turning gear to avoid any startup issue while on standby? As of now, we are keeping machine on turning gear once in day for 2-3 hours during standby. Best Regards, G.Rajesh I&C Engineer

Dear All, Good morning!! We are looking your valuable feedback why exhaust temperature limited to 529 Deg. C at base load than the previous 561 deg. C?? Background discussion: UNIT DATE BASE LOAD (Mw) TTRXB TTRXP TTRXS TTXM CPD (Bar) GAS CONS (Sm3) AIR INLET. TEMP (deg. C) GT-2A...

Dear All, We have noticed problem with Moog servo valve once it cleaned with thinner. Background: In the pass two major inspection we had problem with startup, Speed /stop ratio valve (SRV) was hunting and impact on load. It was rectified after replaced Moog valve with new one. Earlier...

Dears. Our site one of the GE Frame-6B unit is having ratchet trouble. Earlier when unit was on cool down we used to get "ratchet trouble" but shaft is rotating. In the past two days with the same alarm shat is not rotating. Hydraulic ratchet pressure is 50 bar and 20CS is getting...

Dears, We have 3 Frame-6B and 2 Frame-9E GE machines. In Fr-6B all compartments were equipped with fire protection system like fire detector and Co2 lines. In Fr-9E after turbine compartment there is no fire protection system. What is the reason GE didn't provide fire detector and Co2...

Dears, In SRV & GCV calibration 0% and 100% LVDT feedback can be found during manual stroke or Auto calibrate and entered into I/O configurator. In IGV is concern, 100% is limited to 84 deg, so how to calculate 100% stroke value to enter into I/O configurator. Somewhere I read y...