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Have you tried putting the P2 pressure transmitter signal in the Logic Forcing Display to see what happens? (It won't work as you want, but I'm curious why you asked before trying if?) Have you RTFM? (Read The Fine Manual) I believe there is some good info in Sect. 7 about regulators, and I...

CPC, or Corrected Parameter Control, is relatively "new" and not widely used. I think it was wise to post for help here, but it doesn't look like anyone here has any experience with it to be able to offer any help for your issue.

You have neglected to explain what it is you think droop speed control does. If you look at the block that generates DWDROOP you will see that it multiplies DWATT by DWKDG to derive DWDROOP. So, anytime load changes (that is, any time DWATT changes) DWDROOP changes. DWDROOP is <b>NOT</b>...

You know the answer to this question. You are removing the "offending" T/C values and jumpering good values in their place. The Speedtronic does not now know that an exhaust temperature spread exists, and so now the turbine buckets are being heated and cooled excessively once per rotation...

Thanks for the feedback. I'm going to go back to what I said earlier about Booster Atomizing Air Compressors: Most are roots-type blowers, and when operated in reverse draw excessive current which usually trip the breaker of the motor starter. You have said on repeated occasions that you...

I forgot to paste a section I had wanted to move to the top of the post: This refers to velocity (seismic) vibration pick-ups only, because they are passive devices which don't have any signal unless there is some minimal "vibration". That's why the Speedtronic passes a small current through...

The vibration inputs of the Mark V impress a small current through the transducers when the turbine is not running (and the velocity pick-ups are not putting out any signal). This is how it checks for pick-up "readiness" when the turbine is not running. This practice started with the Mark IV...

Hello? We're waiting for your response to try to understand how to reply.

G.Rajesh, Let's address these "advantages" one by one. >1. Replacement of cards is easy It's probably <b>easier</b> than the process of replacing Mark V cards, but that's only because there aren't so many ribbon cables and one doesn't need a ladder or to replace PROMs. Easy is another...

If you just enable steam injection when you are starting the turbine, the Speedtronic should take care of all of the sequencing of warming-up the valves and starting steam injection when the fuel flow reaches the enabling fuel flow Control Constant (presuming the steam is at proper pressure and...

The current drawn by a fan motor is a function of the air being moved by the fan. Without being able to see the P&ID and understand the placements of the dampers (gravity- operate and/or latched) we can't comment with any degree of certainty. We don't even know if the configurations of the fans...

Does the unit have an injection control valve? GE has a habit of including Control Constants which are not actually used in the application code. This sounds like what you may be experiencing. If you are unable to find any code for writing to WQR and/or AQR, then it's likely that the...

cww, For those of who are not familiar with chicken switching, can you please explain? Thanks in advance!

I don't believe this is a discrete input; it's probably an "internal" logic signal that is written to by some diagnostic software in the PROMs on the TCQB card. Have you confirmed that the prox and probe on the turbine are working correctly? Have you checked the cabling between the B-N...

This is possible, but it involves much more than just removing the AA compressor. And if you're thinking that this process can be quickly reversed when gas fuel becomes available, it can't be.

Are you referring to NOx injection or Power Augmentation injection? Have you looked at the Control Specification provided with the Speedtronic turbine control system? The signal for NOx injection flow reference is WQR. I believe the signal for Power Augmentation flow reference is AQR. You...

You said the droop was always changing. From that I would infer that you have found "the droop" so you should be able to determine which Control Constant(s) affect droop. Please tell us how much the frequency of the grid the machine is synchronized to is changing and if this is a regular...

Please explain what you believe droop does and how you believe a change in the droop characteristic would change a machine's behaviour.

G.Rajesh, Please explain more fully what you mean by this statement. It is incomplete.

In addition to acting as the gas fuel stop valve (before the incorporation of VS4 in recent years), the SRV serves to drop the pressure upstream of the GCV during starting and acceleration, and also to maintain a constant pressure upstream of the GCV during operation at 100% speed. If there...