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Thomas, You are the victim of poor configuration from the GE factory, and a poor start-up. Many Mark Vs either retrofitted with GE Mark V HMIs or originally shipped with GE Mark V HMIs were not properly configured from the factory. There is a file (and I'm sorry I don't recall which one it...

Wheelspace temperatures are indicators of internal machine temperatures, particularly rotor temperature. Cooldown (hydraulic ratchet, slow-roll, etc.) must be maintained until machine internal temperatures are low, which indicates that if the unit is taken off cooldown the rotor will not...

This topic has been covered before on control.com. If you haven't used the 'Search' feature, please try it. It's not as user-friendly as the previous version (one has to precede each word with a '+' sign; there is Help available), and one may have to use several search terms (just like with any...

Please tell us what type of GE-design heavy duty gas turbine you are working on, and whether or not the SRV and GCV are combined into one assembly. However, from the sounds of things, the SRV is passing. There is a pretty quick test for this: With no hydraulic pressure (i.e., the unit is shut...

Have you tried to create a Graphics Window? Have you read the Toolbox Help file on the topic/subject of Graphics Windows? The first thing you want to do when attempting anything like this is to <b>make a back-up of the .m6b file!</b> I don't believe you can "insert" a Graphics Window...

When you're operating as an island, the power factor is what it is. If you try to control power factor with two machines, and the power factor changes then there are going to be issues, probably over- or under-voltage. maybe even some kind of VAr fighting might even happen under worst-case...

Preselected Load Control is really just a <b>lazy man's</b> way of not having to manually make small adjustments to the load. If an operator manually loads a unit to a desired value, or even if it's loaded to a set point using Preselected Load Control and then Preselected Load Control is...

Trying to control gas turbine exhaust heat input to a waste heat recovery boiler with dampers is pretty much an inherently unreliable method to begin with. You're talking about moving "vanes" which are large "sails" in a very hot environment against high air flows which cannot be reliably...

What causes the distrubances? Frequency excursions? Fuel supply disruptions? Dirty oil? Preselected Load Control causes the Speedtronic to adjust the fuel to try to maintain the Preselected Load Setpoint. If the instability is caused by frequency excursions, then the Speedtronic will NOT be...

The Mark V Maintenance Manual, GEH-5980, has a section on assigning spare I/O points. It's not difficult, <b>BUT</b> the real problem comes in if the operator interface is a GE Mark V HMI (with MS-Windows and CIMPLICITY), especially if there are multiple units and HMIs on the StageLink. I/O...

And who was making the inquiry? The corporate lawyer? A vendor trying to sell services? A concerned employee? What kind of work are you talking about? Hi-pot testing? Cleaning? Measuring the polarity index? Changing filters? Replacing bearings? It all depends on the work being done and the...

GE, being the capitalist institution they are, provide a Recommended Spare Parts List for every Mark VIe panel they sell. (Makes it "easy" for Customers to order spares from the list, thereby increasing their cash flow and their profit margin.) If you don't have the Recommended Spare Parts...

You haven't told us when this problem started and what was changed to create this problem. Are you confident of the connection between the HMI and the Mark VI? Because if you're not getting alarms *AND* data, then it might be the problem with the Ethernet link between the HMI and the Mark VI...

Thanks for the feedback!

I believe you'll find these are actually differential pressure switches, and they are monitoring the differential pressure across some "trash screen". So, if the filters ruptured before the implosion doors opened and plugged the screens, the dp would increase. Some older units had some very...

The only difference between a motor and a generator is whether the device is producing torque from amps (a motor) or converting torque into amps (a generator). Motors and generators are electrically very similar, it's just that there aren't many motors as big as most generators. Most generators...

I've been trying to come up with a response to this question and I don't know exactly how to respond. If you have the Mark IV Speedtronic elementary, it clearly shows the algorithm for determining FSRT, so I'm not really clear what the problem is. EXCEPT that one needs to remember that when...

How would you connect the potential transformers (I'm presuming you're talking about the ones used for synchronization purposes)? Isn't open delta sufficient for synchronization purposes? Doesn't it reduce the amount of wiring required to just three wires for two voltage sources? As for the...

F = (P * N) / 120 F = Frequency P = Number of poles of generator N = RPM of generator rotor On a single shaft gas turbine (even one connected via a reduction/load gear) driving a synchronous generator, the speed of the gas turbine shaft is a function of the frequency of the grid to...

While not as user-friendly as the former 'Search' feature, the present 'Search' feature of control.com is very fast and very good. Entering a search term of "+TTRX" (without the quotes but with the plus sign) yielded the following as one of the top responses...