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Andrew, thanks for the feedback!!

Andrew, not sure if this answers your question but I will try. As you say it will depend on the efficiency and heat rate of your gas turbine, steam turbine and boiler. But my experience is that you can expect to get 40-60% of the gas turbine load from the steam turbine on most newer gas...

As usual CSA's answer is right on the mark! In my opinion it boils down to a system that has: 1) Code that is written well and documented. 2) Hardware that is reliable, robust, and will be supported for many years. 3) People exist that are familiar with the logic, hardware and...

CSA, I was going to reply to this post, but since the poster asked about controls retrofits and then mentioned three companies of which none was the OEM I suspect where he is going. Ahdash, I am with CSA in saying that I still side with the OEM. They designed the machine, built the machine...

Thanks CSA, more information always helps. Maybe at some point I will see some code and a system like this.

Dear Shakarami, I am not sure I am fully clear on your question, but as CSA is keen to say, "I'm sure I'm going to regret this", but here goes anyway. First, the answer to your question will depend on the application code running in your controller. Without being able to see the code, I...

Hal, you can find information on this card in GEI-100560V, page 50. Or as CSA tells it is in the 6421 manual, the revision I have is "P" and its on page #425. If you don't have the manuals, sign up for the GE controls connect site and you can get them from there.

CSA, guess I am guilty without even knowing it!!! I will have to talk to some other folks who have been here longer than I and learn more about the past. I like your suggestion to Mark on using the alarm for ratchet system trouble. For Mark any well thought out logic that includes lesson...

Ayman, I do not have a full procedure for what you are asking, and it would really depend on how proficient you are with toolbox and cimplicity. But as you stated your controllers are showing failed, and you mentioned diagnostics on the VCMI cards. Without any controllers being in "control"...

Rahul, my basic understanding was that during a turbine trip, not a normal shutdown, most control systems will break vacuum in the condenser to equalize pressure in the steam turbine. This will have the effect of slowing the machine down, or prevent or minimize an overspeed event due to the...

Ayman, it would be helpful if you provided more information as to what events led up to this problem. Were the MKVI cores in "Control" and "Equal" before you started? What led you to do a put and get, vaildate, build etc? Simply if your MKVI is "failed" then you will get no data to...

Dear GJRS, I will be interested to hear how you proceed. We have machines running Win2K and WinXP. I am looking to upgrade at some point in the future. I know that to run in a newer operating system(XP) compared to Win2K that TCI needs a license dongle. It is my understanding that to...

Mark, here is some more information for you to chew on if it helps. I help maintain a couple Frame 5's and 7's. Our 5's are 1985 vintage, and the ratchet assy. is on the torque converter, not the accy. gear. To date we have not have any tubing failures or major oil leaks, I hope I did not...

Martin, I would like to comment on your question, offering some facts as I understand them, and some opinions as well. I do not have any experience with Siemens systems. My experience is with Speedtronic, Micronet, ABB, Advant, and Allen Bradley products mostly. I can't comment on how...

Dear Terkuma Ivande, thank you for the reply. I think you comment of the gas yard pressure control valve is a great observation and very well could be contributing to the problem. I would urge you to read and investigate any source of information regarding the machines you maintain. The...

Dear CSA and 309EGUY, not to take this post too far off course but I do want to chime in on 309EGUY's comments regarding servo deadband. On our site I also manage a Alstom steam turbine that uses Moog servos and a Balluff LVDT assembly for feedback. The Balluff converts the LVDT into a...

Dear Teekay, this is an interesting thread you have. I will attempt to help as others have here have, but understand as others have noted we need your help to supply as much information about your site, so the comments we offer are useful. My assumptions are this is a Frame 5 gas turbine...

Raza, I would suggest you refer to GE document #6421 under the section for the VME power supply. The manual does a reasonable but not fantastic job of explaining where each power supply voltage is distributed. It does not exactly tell the purpose of each voltage. All voltage levels are...

Dear Rajesh, I do not have any experience with, nor was I aware of any type of tester for servos so I can offer no advise or experience to that subject. As mentioned before and from Mr. Johnston as well, oil contamination is one major source of servo failure. If you are truly failing...

Dear Rajesh, You asked for opinions, so that I what I will offer. My opinion is to not attempt to clean any servo with any type of cleaning product. There is the risk that internal seals and coil insulation could be damaged by cleaners that are not compatible. The service life of any...