Search results

Too much maths for me, Phil. All those ratios.

> in general the inputs to the blocks are shown on the left side of the block and the outputs from the block are shown on the right side of the block (so signals "flow" from right to left, generally). < er, ... uh, ... If the inputs are on the left and the outputs are on the right, then the...

I'm going to take a stab at this, but it's a long shot. You seem to be saying that when your tg gets separated from the grid that it is tripping on over frequency even though there is 10 MW of load available. If the 505 remains in Droop Speed Control mode when the grid breaker opens and...

Learning a new language is always difficult, and this is nothing more than a different way of expressing paths, and comparators, and mathematical operations (addition, subtraction, multiplication, division, square root, etc.), and some logical operators which prevent or permit signals to pass...

I knew that the 1/! key on Phil Corso's keyboard would give out one day, and it seems it finally has. The thread is: http://www.control.com/thread/12576-<b>1</b>-4119 (If you search for +Sriram you will find it.) Also, looks like the O and P keys are beginning to fail....

pklman, The Mark V operator interface has a "list" of all of the inputs and outputs of the control system, and where they are connected and what their signal names are. It's in the F:\UNIT1 directory and it's called TC2KREPT.TXT. It's an ASCII text file which can be viewed with any text...

This concept of CPD-biased exhaust temperature control is very generic to GE-design heavy duty gas turbines, so even though the control systems have changed over the years the concepts of turbine control haven't. The same exhaust T/C arrangements are used in gas turbines and the same practice of...

We don't have enough information about the unit and conditions at your site. Do you have conventional combustors or DLN combustors? Usually, DLN combustion systems have a requirement for a minimum of 50 deg F of superheat on the gas fuel in order to prevent primary zone reignitions while...

There may be some ramp rate limiter on the energy control admission valve to the prime mover, and we don't know how short or long the frequency disturbance was or how unstable it was. You need to contact the supplier of the prime mover governor (control system) and ask them this question...

Have you looked at this thread: http://control.com/thread/1260993438 Do you still have questions?

Mik, I just want to ask, have you ever seen the speed of a generator decrease as it is loaded (presuming it's a stable grid or a stable "island")? Because the speed of the generator is directly proportional to the frequency. And, if the generator is mechanically coupled to the prime mover...

In past posts you've said the units rarely run on liquid fuel. So, one has to wonder if this is just a result of lines "draining" down and having air pockets develop between liquid fuel operations. This is really a difficult question, and situation. Those units have been there for years; is...

The main purpose of the VPRO is to provide independent ("emergency") electrical over speed protection, independent of the "primary" electrical over speed protection in the control processor(s) (<R> for a SIMPLEX; <R>, <S>, and <T> for a TMR panel). GE deems it necessary to have triple...

This is definitely a component I have not seen before, but then GE and their packagers are using new, cost-reduced designs all the time. (Hmmm..... I wonder if there's still a "dump valve" between 20FG-1 and the SRV servo-valve?) If you go to the home page for hydraforce and click on the...

This is a <b>PERFECT</b>example of "calibrating" something that likely didn't need calibrating, and screwing things up in the process. When someone goes out during a maintenance outage to "calibrate" a working pressure switch, the first thing they do is record the as-found condition of the...

G.Rajesh, Maybe you don't understand the reply? MAYBE? The only reason it might be necessary to change a device's regulator type is if it's not a straight position loop regulator (Type 4n) and you're trying to manually stroke the device without using AutoCalibrate's manual position...

I believe there are many new aero-derivative units being run by Mark VIe turbine control systems. I don't know how many existing units have been retrofitted with Mark VIe systems. If the unit(s) being retrofitted are compressor-drive machines, is the compressor control also being...

And what happens when you put the 2.67% value (negative) in the Speedtronic for all three processors and then tell PM1 to go to 50% stroke? Again, I see more and More and MORE people never bothering to measure the stroke or angle. Speedtronic panels are good, but, I don't know if they're that...

Thank you very much for the feedback!

G.Rajesh, The Mark V Application Manual, GEH-6195, describes the various regulators, in Sect. 7, I believe. Also, I believe the block in the CSP for the servo-valve output for the SRV shows how it is re-configured when it's in calibration mode. But I know the description is somewhere in...