Search results

The L.O. bearing header temperature can change quickly by using the manual hand wheel. I hope jagriti, or whoever might try using the manual hand valve will return the assembly to AUTO when they're done. But, you're right, it's agonizingly slow under Automatic control. Which is one reason a lot...

jagriti, Could you please tell us how quickly the L.O. temperature changed when it "suddenly" increased? Could you tell us what the temperature gauge on the side of the L.O. tank (Accessory Base) reads and what the HMI L.O. Bearing Header Temperature value is at the same time (or within a...

Curious_One, Thank you for the correction, and I've edited the post. The typical L.O. temperature regulating valve, manufactured by Robertshaw, is something which has to be experienced to be understood. Everyone has to start somewhere, right? jagriti has been around Control.com long enough; he...

Hello, jagriti! First of all the L.O temperature of the gas turbine bearing header should be able to be regulated to no more than approximately 54 deg C (not greater than 130 deg F). So, a temperature of 64 deg C is too high to begin with. Casting that aside, there is usually a T/C...

kehili, My suggestion would be to disconnect the "remote" wiring from the AUMA actuator and use a wire jumper (it doesn't have to be very long, with a small bit of insulation stripped off one end and the normal amount of insulation stripped off the other end to fit under the terminal board...

kehili, When did this problem start? After some kind of work was done on the valve and/or actuator (the AUMA device)? I don't really see any signal to tell the AUMA actuator and valve it's in AUTO (local??) or REMOTE. Everything above the dashed line at the "top" of the drawing appears to be...

Krishnaa26, Good thoughts, all. But, all compressor control systems are not programmed the same (to do the same things, or even what we think should be happening). Best to consult the graphs and documentation provided by the compressor manufacturer(s) for the most important information and...

Integrator, Yes, but--in this case the shields are already earthed at BOTH ends and yet the damage has occurred twice. So, what would YOU recommend, Integrator? That is the question here: How do we help the original poster solve the problem? One of my favorite quotes is, "The good thing...

Abhishek Kumar, Well, plugging/choking does not ALWAYS immediately cause the supply pressure to decrease. It's not just about pressure--but also flow, which is most directly affected by plugging/choking, especially in the early stages. It's not until the later stages of plugging/choking that...

Anhishek Kumar,, Pretty simple to explain, actually. Presuming no one has "calibrated" the LVDTs on the two valves, the most likely causes are: 1) Plugging (Choking) of the strainer upstream of the SRV (this reduces flow-rate through the strainer, and causes the two valves to have to open more...

emilygrey, For what purpose(s) do you prefer pair cable than core one? Can you describe how pair cable is more robust than core one cable?

Windyhart, I guess you are trying to say that after about four hours, the unit "trips" (the engine shuts down because of some fault), and that according to the HMI the speed increases very quickly. USUALLY, there are alarms from the engine control system and/or the electrical system to which...

By the way, those AA-to-CPD ratios were absolute--so add ambient pressure to both the AA gauge reading and the CPD gauge (transmitter) reading when calculating the ratio (divide the AA-plus-ambient pressure by the CPD-plus-ambient pressure to get the ratio). Write back to let us know what you find.

Obd, Um, ..., Er, ..., You didn't even acknowledge whether or not lightning strikes and/or electrical storms may actually exist in the area where this equipment is located. Further, this query is not even really remotely related to the topic of the original poster. You should be using...

There are all manner of liquid fuels--distillate (HSD--High Speed Diesel; #2 diesel; etc.), heavy fuel oil (bunker or residual fuel oil), and even light crude. What kind of liquid fuel, pray tell? Replace or refurbish the Main Atomizing Air Compressor. Ensure all AA solenoid- operated valves...

I agree wholeheartedly with David_2's excellent response. 'Nuff said!

NFinch, Again, personally, I wouldn't try using the generator to spin the turbine without flame--but, also, again, I am very conservative when it comes to gas turbines and auxiliary equipment. If the generator breaker isn't opened when the fuel is shut off, the speed isn't going to change...

NFinch, I admit, I had to think about this long and hard, but with the statement, "... The control system could be adapted to periodically keep firing the ignitors as a protection against flame-out, otherwise the Reverse Power protection can protect against over-loading the generator. ..." you...

NFinch, ",... one [operator] mentioned they had reignited a flame-out [of a Frame 6B unit] in the past. ..." That's a pretty wide open statement. Did the re-ignition occur while the unit was at or near rated speed? How did they do that, exactly? Was it intentional? If so, it probably required a...

NFinch, Interesting idea/concept. Yes; I would think if the IGVs were not kept at minimum operating angle that the load on the generator would possibly be greater than nameplate under some circumstances. I have never actually worked on a synchronous condenser application myself, so I've never...