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In the summary you indicated the unit was "...shutdown...." In the body of the original post you indicated: >The Gas Turbine Generator trips after a >tripping alarm initiates 'Stop from the >Generator Control Panel.' In GE-speak, a shutdown and a trip are two <b>very</b> different...

Yes, it is possible to configure additional alarms in most Mark V panels, presuming there are spare alarm logic points available. There are 512 alarm logic points in <Q>, and 64 in <C>. Many of them are used in a CSP, and some should be spare but that isn't always the case, so check first...

The Hydraulic System Pressure should <b>NOT</b> be set using the <b>relief valve</b>. The <b>relief valve</b> (VR21, if I recall correctly) is there to protect against failure of the pump pressure compensator. If you are adjusting VPR3 above the setting of the relief valve and then using the...

Exhaust duct (back-)pressure is also measured in mbar (or in H2O or mm H2O). If the gas turbine is running, it should be positive, never negative! The usual problems with exhaust duct back-pressure instrumentation are the result of improper installation, improper placement of the probes...

The originator asked what was the difference between TTXDn and TTXD1_n and which was the more important parameter to monitor. Physical placement of exhaust T/Cs is accounted for in the monitoring scheme. GE performance engineers have the data, the software applications and the knowledge to...

The chin strap was a dead giveaway....

When did this problem start? What is the gain of the servo regulator for the SRV? What is the gas fuel supply pressure doing during the transition? How stable is the gas fuel supply presssure during load changes and during the transfer back to liquid fuel? How long is the fuel...

If this is occurring in both unloaded and loaded running, then the governor and/or fuel rack has a problem. Either the governor is not tuned properly, and/or the fuel rack is binding or the mechanism that's operating the fuel rack is sticking or not functioning properly. If the voltage is...

The controller calculates an amount of servo current that is to be applied to the coil and then compares that value to the actual current physically flowing in the circuit. If it differs by more than 5%, the alarm is annunciated. It's interesting that the alarm "originates" on the same card...

This used to be called the "IDM", the Installation and Design Manual, and it was published by GE Aircraft Engine Department in Evendale, OH, USA. I don't know if they're still available or what format they're in, but they were good documents for understanding how LM engines were supposed to...

It would help if you provided a little more information about the alarm you are trying to add and what is going to be "driving" the alarm. In other words, you will need a rung to energize a coil in the CSP to cause the alarm to be annunciated. And, if this unit uses GE Mark V HMIs with...

The easiest way to see what each of the arrays consists of is to use a Demand (User-defined) Display for each array and then analyze the results. In general, TTXD_nn is the "raw" value of the exhaust T/C feedback from the numbered location. For example, TTXD_7 would be the raw exhaust T/C...

Does either unit have DLN (Dry Low NOx) combustors? Does either unit have Water- or Steam Injection for NOx reduction?

$IS (the dollar sign means expect to pay a LOT of money for the equipment and certifications involved in Safety Instrumented Systems) is something that is applied to the entire facility, not just to bits and pieces of a turbine island or production facility. If the entire facility doesn't have a...

First, it's revealed that you were using SPY and other unsupported applications. We've still never understood if you know what the "idle time" was before you began using the unsupported applications to know if there is really a difference in "idle time" at all. Third, now we learn: > When our...

When did this problem start? There is a considerable amount of cooling and sealing air supplied to the #2 bearing (which is "inside" the unit). If the #2 Bearing Vent (sometimes called the "fire plug") is not installed properly or there is some problem with excessive cooling and sealing air...

maint, The reason for contributing to control.com is that many people can read the questions and responses to questions. If we take the discussion off-line, then only one person/site can benefit from the exchange(s).

The turbine compartment pressure is "monitored" to ensure that the integrity of the compartment fire protection is intact and that there is either a positive or negative pressure (depending on whether the compartment is pressurized by the compartment ventilation fan or is under a very slight...

If I recall the story correctly, MKVSTUDIO was written by a GE engineer at his kitchen table at home as he was not satisfied with Dynamic Rung Display. I believe he wasn't paid anything for his efforts, and GE does not support the software, though many GE people use the application. The Mark...

Toolbox can be used to open configuration files when <b>not</b> connected to the Mark VI and view the application code (sequencing) and Control Constants and I/O Configuration. It's not necessary to be connected to a Mark VI to use Toolbox to view the configuration files for a particular unit...