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Guerini, As glenmorangie said--the secondary purpose of the Stop/Ratio Valve is to control the pressure upstream of the GCV when the unit is at rated speed (which is a range in the case of a MS-3002 mechanical drive turbine). This allows the fuel flow through the GCV to be more linear...

Guerini, P2 pressure is a function of HP speed: P2 Pressure Reference=(TNH*FPKGNG)+FPKGNO FPRG = Fuel Pressure (P2 Pressure) Reference-Gas, in psig TNH = HP speed, in percent of rated FPKGNG = P2 Pressure Reference (Gain), in psig per percent speed FPKGNO = P2 Pressure Reference (Offset), in...

Does it matter what a card is called--or what it does? (With the exception of the main microprocessor card (UCVx), if I recall correctly all the other cards in Mark VI racks begin with V.) Thank you for the thank you.

tanzimo6, I want to know if you read the Mark VI System Guide section about the VCMI. The GE Mark VI Speedtronic control system uses printed circuit cards that (generally) conform to the Versa Modular European standard (also known as VME). Hence, the “V” in VCMI means the card is a VME...

Wow! These came from a GE internal SupportCentral site which was taken down more than 10 years ago. This is a blast from the past. They are as relevant today as they were ten years ago. Thanks for sharing, HamsterKing!

Insufficient information. Does the "PGP" (should describe the PGP clearly) have Isochronous Speed Control governor mode? Do the three units receive some kind of load signal from a "remote" source? What is the load being supplied? Does it exceed 15 MW? Also we weren't told what the...

Setho, The words are used interchangeably to refer to the same motor--the one used to START the turbine. The same motor is also used to CRANK the turbine (spin it at a low speed (approximately 20% of rated, sometimes lower) for testing, calibration(s), purging, etc. During STARTing, the...

Useeeeum, It's not possible to answer your question without understanding the source of the dust. Is it from a nearby road? From a nearby field or sand dunes? Where is the dust coming from? There are many GE-design heavy duty gas turbine units (and aeroderivative units, too!!!) which were...

Nasser56&, This thread is about GE-design Frame 5PA. If you want better luck with obtaining a GE-design Frame 9HA Operations Manual you should open a new thread with your request in the Subject line, and in the body of the thread. Blessed day.

glenmorangie, I can possibly envision a situation where the oil flow OUT of the RGB back to the L.O. tank could be impacted (to a small degree) by a higher than normal pressure in the L.O. tank. BUT, I can't understand why that would affect the oil flow INTO the RGB from the L.O. Bearing Header...

"... After 88QV was restored ..." What was found to be the problem with 88QV? Was any measurement taken of the current being drawn by 88QV? Is there any record of "normal" current drawn by 88QV to compare against? Were the internal filters of the L.O. Mist Eliminator inspected? (I presume not...

Txture, A good explanation of the issues, but two things seem to be missing: the type of excitation system, AND whether or not the excitation system was working during the reverse power condition. If the excitation system was not working during the reverse power condition (for just about any...

AamirSohail, The high-pressure fuel pump clutch solenoid is a large electro-magnetic coil that, when energized, squeezes a set of discs together to transfer torque from an Accessory Gear output shaft to the input shaft of the high-pressure liquid fuel pump. Newer fuel pump clutch solenoids...

AndyLe, There isn't that much difference between (Legacy) Toolbox and ToolboxST. The basic procedure would be the same as above. I LOATHE telling people to force a servo-valve output--because then they think it's acceptable to force it when the turbine is running. AND IT'S NEVER ACCEPTABLE TO...

Aye, that!

I forgot to mention a good Ruby port from the Douro River Valley would be pretty darn good, too.

Mo.Badawy, As for how fogging can affect the DLN system, you will have to look at several blocks. The combustion reference temperature calculation probably uses relative humidity (there is usually a relative humidity sensor in the inlet duct above the axial compressor bellmouth). It may also be...

Humidity sensors have been used with very mixed results over the last three or four decades. And just adding instrumentation to a system that is highly susceptible to mechanical issues (plugged orifices) isn’t going to solve the main problems with the system. In fact, it might just make the...

glenmorangie, (y) A better year without a pandemic would be very welcome. And greatly reduced inflation. And a return to more normal supply chain and logistical issues. And a gentler, more civil and graceful existence. And a meaningful reduction in greenhouse gases. And an increase in...

dinoo31, Many thanks for the update!