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G.Rajesh, One more thing; when you take a thread off-line we all lose the benefit of learning from the process and the outcome. And that's one of the best things about control.com, when people provide feedback! And, when we learn from the process during troubleshooting.

Peter Clout, I did find one reference to a "scanner" application that seems to work via GE GSM which must be running on a GE Mark VI HMI. That seems to imply that Vista doesn't communicate directly with Mark VI control panels over the UDH using EGD. Can you confirm how your system...

You have not provided enough information. What EEPROMs are you updating? Have you upgraded the I/O Configurator "cards" for the EEPROMs being updated? I have seen this problem once before, when there was multiple FORMAT partitions present on the <I> (the same thing could happen on a GE...

Hello, operator of a Combined cycle power plant, On-line water washing is not as effective as off-line water washing. In fact, there comes a time after several on-line washes there is little or no benefit derived from performing an on-line wash, and at that point it's best to shut down and...

I don't believe they meant "death cavities"; more likely they meant "dead cavities pressurized with compressor discharge air". To my mind, if all of the passages were seal-welded at the flanges on the fuel nozzle there should be no path for hot combustion gases to flow through. They air...

First, did replacing the suspect T/Cs resolve the spread condition? Second, what kind of transmitter is being used to sense CPD: one with a 0-5 VDC output, or one with a 4-20 mA output? Third, was the power output <b>at Base Load</b> with the 'as-found' calibration values higher or lower...

Peter Clout, It would seem you have some experience with GE EGD (Ethernet Global Database) communications based on your mill experience. I think the question we are all interested in knowing the answer to with your GE Mark VI HMI/Historian: Can it display alarms and events with the...

G.Rajesh, The originator of this thread does not seem to want to provide the information requested of him. For the SRV to close suddenly after firing there is likely an alarm, or more likely, several alarms which are present during purging and firing and at least one which occurs after flame...

When did this problem start? After the Main AA Compressor was removed and certain systems were seal-welded. We don't know where the seal welding was done, nor what kind of back-flow problem might be possible or even has occurred. One of the purposes of purge air is to cool the passages...

Seeing this is a 7FA, it's pretty unlikely the site does not have a services agreement with GE of some kind. If so, you may be bound to try what GE recommends. What do you have to lose? You're either going to try what they suggest, or you're going to have to purge the H2, then purge the CO2...

The air flowing through the Inlet Bleed Heat system comes from the discharge of the axial compressor. This is air that is "extracted" from the axial compressor discharge. Energy was used to compress this air and instead flowing into the combustors and through the turbine and exhaust it is...

Scavenging rates do not have to be equal on both ends of the generator. In fact, normal differences in seal oil flow-rate to each end of the turbine will require that in order to be able to make the purities of both ends equal that scavenging flow-rates will need to be different. It does...

When a unit is transferring from gas to liquid, there isn't any combustion mode transfers for liquid fuel operation, to speak of. It goes very quickly from gas fuel premix mode to liquid fuel diffusion mode. When you're transferring from liquid to gas, the turbine needs to go through the...

How have you been able to increase power output, efficiency, and reliability using the real-time performance monitoring tool? Most of the gas turbines I have worked on have redundant (at least two) compressor discharge temperature thermocouples, and they are not mulit-element thermocouples...

Aurelia Smith, You can contact one of the advertisers here on control.com, Gas Turbine Controls (www.gasturbinecontrols.com). Or, do an Internet search for 'Speedtronic' and find anyone offering Mark II cards for sales and contact them. You should also be able to tell the people you...

John, I've been on the commissioning side of this and I can tell you: It's not fun for anyone. There's so much finger-pointing and generally the field people (the ones it always falls on to make this "idea" work) don't have the knowledge of the internals and gut-level workings of the systems...

<b>Not enough information.</b> What alarms are being annunciated when this is occurring--specifically, what alarms are present and active during purging, and what alarms are annunciated during firing, in order of annunciation? Is anyone watching the Trip Oil pressure? Are you able to trend...

Harish, Why can't you look at past (historical) data and use a typical value until such time as the issue(s) with the compressor discharge T/Cs can be resolved? What is the function or application that requires such accuracy? Do you run the unit at various loads meaning compressor...

Everyone wants the same thing. No one wants to use the OEM's HMI, preferring instead to use one of their own preference. Since there is no "standard" for commands and alarms/events it would be extremely difficult for GE to document their protocol for commands and alarm/events such that any HMI...

We don't know what kind of control system you have, nor enough information about the ratchet. Does the unit have a ratchet self-sequencer? Does the jaw clutch close? Have you tried installing a temporary gauge in the forward stroke piping to see if pressure is being established? What...