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The differential pressure measured across inlet air filters is an indication of the cleanliness of the filters. A high dp means a dirty filter; a lower dp means a cleaner filter. Even new filters have some dp, they are, after all, a restriction in the air flow, albeit a slight restriction. A...

The calculation for TTRF1 is proprietary; that's why it's inside a block. If you have an early Mark V, the calculation is implemented in primitive blocks (ADD, SUB, MULT, DIV, etc.). You can see all the inputs for the block in use at your site in the CSP for the unit at your site...

If properly enabled (and lots of buttons on GE Mark V HMI Displays are not properly enabled in sequencing), Temperature Matching will look at a setpoint (the Temperature Matching Setpoint, which should be another button on the display, or it might come from an analog input to the Speedtronic)...

A Speedtronic turbine control system calculates an exhaust temperature reference, TTRX, based on axial compressor discharge pressure. This exhaust temperature reference represents constant firing temperature, which for many machines with air-cooled first stage turbine nozzles is the temperature...

One of the advertisers here on control.com, GTC (Gas Turbine Controls Corporation) has Mark IV parts which they warrant. Their website is www.gasturbinecontrols.com. There are other vendors who also have Mark IV parts. If you want to upgrade your Mark IV and you want a new GE Speedtronic...

So, there is more than one unit being installed? If so, what are the PROM revision numbers for the GHD proms on the other unit versus the rest of the PROMs? Is the other unit having similar problems? You say you've tried verifying all these things. Have you reinstalled TCI and CIMBRIDGE...

Then it would seem there is something amiss with the installation of TCI, CIMBRIDGE, or CIMPLICITY. Or, there is some mismatch with the version of TCI and/or CIMBRIDGE and the DCC/SDCC PROMset.

The originator's question should be answered by the company providing the hardware and software to implement the new combustion and turbine hardware and to control the fuel flow-rate to prevent damage to the new hardware while maximizing power output. GE uses a very powerful and time-consuming...

Now here's an interesting post. Someone who's concerned about the <b>lack</b> of Diagnostic Alarms. This is certainly a first, for me anyway. (grin) You may have already looked at this, but the CIMPLICITY Alarm Display can be configured to show ALL alarms and events, or just particular alarms...

Depending on the vintage of the Mark IV used on the turbine, it's not very scientific. How long has this problem been occurring? What changed just before the problem started occurring? What have you done to try to troubleshoot the problem? It's not clear what you were trying to say...

Thanks, Phil. I can always count on you to point out any errors in my replies. I realized my mistake on the relay nomenclature about 20 seconds after clicking on 'Submit Post'.

It's likely the two are one. If your post is understood correctly, 701 is controlled by the Speedtronic Mark II, which was recently calibrated, and is being operated in Isoch speed control mode. In the situation you describe with one unit in Isoch in parallel with a unit in Droop, the Isoch...

If ANYBODY's unit was on line producing 100 megawatts and the field breaker opened, accidentally or otherwise, the unit should have tripped, or at least the generator breaker should have opened (tripped). The cause should have been Loss of Excitation, usually a device with ANSI number 41...

I would think this would be a good candidate for the control.com ControlWiki: http://control.com/thread/1252508645

All of the discussion below presumes that the synchronous generators are driven by prime movers that are mechanically coupled to the generators. There are some turbines which exhaust into a "free turbine" which is coupled to a generator, but the main turbine's speed changes with load, but those...

Are you sure that the piping is properly supported? If the piping wasn't re-installed properly and has some kind of stress or strain on it, then it can pick up vibrations from the turbine and seem to accentuate them. Most of the piping systems I have seen have some kind of "sliding" support...

NOx formation is a function of flame temperature; reduce the flame temperature and the formation of NOx is reduced. CO is or can be burned, so reducing flame temperature has somewhat the opposite effect on CO. Water injection for NOx reduction is used to cool the combustion flame...

It does sound as if the "controls" portion of the torque converter is working properly. Have you tried replacing 20TU-2? Also, there is usually a manual button on the end of the 20TU-2 mechanism which can be pressed (though 20TU-2 is usually not in a very accessible or convenient location!)...

This discussion presumes that slowroll on your Frame 9E uses Aux. L.O. Pump discharge pressure ported through variable guide vanes of the Torque Converter to provide the force to keep the shaft rotating. The two biggest reasons a unit won't stay on, or "falls off", slowroll are: 1) Low...

A hydraulic ratchet system used for Cooldown operation to prevent rotor bow is a mechanism that rotates the shaft a small portion of a rotation, then rotates the shaft a similar portion of a rotation after a short time delay (usually about three (3) minutes) and continues doing this as long as...