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VKGUPTA, My last post may have seemed contradictory with regard to how Speedtronic turbine control systems are designed, so I'm going to try to clarify. The 125 VDC supply (be it from a battery and charger or from a DACA) must be ungrounded. That is, one phase (leg) must NOT be grounded...

gtwoman, It's noted that the nameplate data you provided doesn't exactly match the operating conditions you listed. If the Peak Load rating is 21.230 MW and the unit was operating at Base Load and producing 21.2 MW, then it's pretty likely that some turbine performance upgrades have been done...

VKGUPTA, GE Speedtronic turbine control systems are designed to run on an ungrounded DC supply. They use a voltage divider network to <i><b>reference</i></b> the DC supply to ground in order to monitor for grounds on either leg (phase) of the DC supply. When a ground develops on one phase...

ahdash, The turning gear coupling of the Mark VI was broken. There usually aren't any vibration sensors or bearing metal temperature sensors on the Mark VI turning gear coupling. And have you ever seen a "starting means cooldown trouble fault" alarm? I've seen "starting means fault"...

bil07, Have you looked at this thread? http://control.com/thread/1356882957

>after the GE MarkvI had been on turning gear for 5 days First of all, the Mark VI is the turbine control system for a gas turbine--not the gas turbine. Second, we don't know how the turbine has been operated or for how long it's been in service. Third, it's highly unlikely that the...

The accepted "rule of thumb" (guideline) for most GE-design heavy duty gas turbines is that if the unit is hot and can't be put on turning gear within 20 minutes of reaching zero speed then just keep the L.O. Pump running to keep oil flowing to the bearings, and don't try to put the unit on...

bil07, What happens when you right-click on the block in ToolboxST and then click on 'Item Help'? If you think you're having a problem with vibration sensing, please describe the issue you're having. This basic block has been covered before on control.com, maybe not V7, but the basics...

I request you to supply: 1) Nameplate rating of GT (ambient temperature, ambient pressure, output--everything copied exactly from the turbine nameplate) 2) Ambient conditions at time when TNR was 103% and TNH was 100%--including axial compressor inlet temp (CTIM), CPD, barometric pressure...

Volyager2_kbc, I re-read your original post, and you said the valve which was installed in place of 20TU was found in the closed condition. Some of the 20TUs opened to "spoil" the torque converter, and others closed to "pressurize" the torque converter, so without being able to see the...

CuriousOne, >> How can a simple contactor or even a soft start able to >> react to the ability of the motor becoming a generator? A synchronous motor becomes a generator when the "load" driving the motor is stronger than the motor and can rotate the motor, overcoming the torque being...

Hi, five, Can you post your contact information: email address phone number Do these dongles work with Mark V and Mark VI, also? Thanks!!!

Roadz, Have you consulted the manual? The Itron website allows customers to register and receive assistance with questions. www.itron.com Then you can click on 'Itron Access' to get the ball rolling. By the way, it's an S<b>L</b> 7000 (but one still has to register to get the manual...

Is there any concern for the different frequency rating of the sewing machine (50 Hz)? I imagine (another name for a SWAG--Scientific Wild-Arsed Guess) that the sewing machine, if newer, will have some kind of electronic speed control (variable frequency drive?) to control the speed of the...

DavidMCC, I'm sure there's a local JB, and the RTD is likely mounted in the L.O. Drain line from the Reduction (Load) Gear. I'm not that familiar with the gearboxes used by EGT (Flanders?) and I'm not sure where to find the drain line, but I'm sure you will find a JB somewhere either on the...

Frank, If you send your email address and tell something about yourself (student; technician; etc.) and your question to: [email protected] Mr. Phil Corso, who is the owner of the above email address, will be more than happy to help you with your query. For my part, I haven't seen...

CuriousOne, > Please explain the difference between the start of a > induction motor with a simple contactor as a start mechanism > and the start of a generator utilizing a exciter. The difference is about as big as night and day. You see examples of induction motors starting with a...

voyager2_kbc, If you have the typical jaw clutch assembly the teeth are shaped such that as long as the starting means (the diesel engine in your case) is transmitting torque to the turbine shaft through the torque converter the torque will keep the teeth engaged and the jaw clutch closed. As...

There is no "equivalent" of the Mark V Data Dictionary, per se, in the Mark VIe. The really great thing about the Mark VIe (and the Mark VI) is that one doesn't have to edit any ASCII text files (for all intents and purposes--there were some early versions of the Mark VI that did require some...

fse1988, The most curious thing to me is the "Hi-noise" and noise that you keep describing but seemingly haven't investigated. Have you checked the coupling between the motor and the pump? Have you tried using a photo tachometer on the coupling between the pump and motor to see if the...