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chaitu, You don't have to open the breaker to open the bleed valves; you can force open the bleed valves at low load (using Logic Forcing) without harming the machine; it will just not be as efficient because of the loss of mass flow and CPD. I can't tell if you are trying to say that the...

No. I believe the TCPS power supplies are protected by fuses. I also believe that the bigger concern with regards to grounds is the 125 VDC battery, since there's only one and it feeds many devices (the Generator Control/Protection Panel, the turbine control panel, the Emer. L.O. Pump, the...

Thanks very much for the feedback!

I think, at least with the most recent versions of Speedtronic turbine controls, the droop setting is "hidden" more or less by design. The Control Constant is adjustable, but it's not really "visible" in that it doesn't just jump out at you with a name like "DROOP". I'm a little unsure about...

Mark VIe would be a very good choice for both applications. I believe GE have an integrated turbine and compressor control (ITCC) option for Mark VIe which would simplify the controls required for the turbocompressors, and by also using Mark VIe for the turbogenerators you could have a common...

I realized I didn't address the bleed valve questions you asked; sorry. I would guess the temperature differential you are seeing from one machine to the other is the result of the length of time each unit has been running. If the unit which was just refurbished had only been running for...

This is a very "loaded" question (pun intended!). I'm going to qualify my answer by saying: <b>The answer is appropriate only under ideal conditions</b>. And the ideal conditions are that the liquid fuel system was properly purged after it was last operated on liquid fuel, that the liquid fuel...

You say you "need" to upgrade to Mark VIe from Mark VI. Who is telling you this? Are you trying to incorporate compressor control into the Mark VI Speedtronic? (Mark VI and Mark VIe are different generations of Speedtronic turbine control systems. The correct name is Mark VI Speedtronic, or Mark...

You didn't say what fuel is being burned when you are experiencing the high exhaust temperature spread. It's very difficult, and time-consuming, for us to try to write something that would cover gas and liquid fuels. And, this is likely *not* a control system problem. Unless there is some...

I've been mulling this over, and, yes, the desired mode of operation would be to have the better fuel in the fuel system during shutdown. But, if the unit is running on liquid fuel and trips, then there's going to be naptha in the system. I wouldn't think there would be any reason why the...

When the generator rotor is locked in synchronous speed with other generators on a large grid it is effectively a "brake" preventing any increase in speed which would normally be the result of an increase in fuel. When a generator is being synchronized with a grid, it is usually done so with...

So, the originator's problem was related to some problem(s) in the Accessory Gear Box (which is the gear box between the torque converter and the turbine). And, that's all we know. The torque converter nor the control system was found to be the problem, apparently. And, that's all we know.

Great question for the packager of the turbine, or for GE, or for a turbine service company. We seem to have a lot of readers at control.com that burn naptha at their sites; perhaps one or more of them has experience with dual fuel operation with Natural Gas as the other fuel and would share...

Without being able to see the sequencing or application code running in the turbine control system at your site, and without understanding how the unit was originally configured or may have been modified to also burn Natural Gas, it's very difficult for us to say why it's behaving the way you...

Junebug, huh? Extremely interesting choice of pseudonym; extremely interesting. The discussion below presumes a 7E/EA unit with a Voith torque converter with torque adjuster mechanism and describes the way the sequencing is normally configured in a Speedtronic turbine control system and the...

Like most forums sites, control.com has a 'Search' feature. It's well hidden in the upper right hand corner of the banner at the top of every page. If you searched for '+GCV +characteristics' (hint, hint; without the quotes), you will be presented with this very recent post and replies...

me, There are Frame 9E and Frame 9F, -9FA, -9FA+, -9FA+e, and 9FB units. Not that it makes any difference as far as my answer; I don't know the information you are asking for any of them. It's not information or data that's normally monitored or easily collected. If the last stage of...

Good news on the smoking issue. As for adjusting the constants, it's part and parcel of field engineering. Identical cars with carburetors will not always have the same jetting adjustments to run smoothly, and without an exhaust gas analyzer it's impossible to adjust any two identically or...

To detect an exhaust overtemperature alarm condition what's done is to add 25 deg F to the exhaust temperature reference (TTRX) and if the actual exhaust temperature (TTXM) exceeds (TTRX + 25 deg F) then an exhaust overtemperature alarm is annunciated. To detect an exhaust overtemperature...

So, if I understand your post correctly, problems with load tunnel temperature and exhaust back-pressure began after installation of HRSG on two machines. Do both machines have the same problem? Is the load tunnel temperature high when the unit is running or when it's shut down after it's...