Search results

ibra_brown, I want to answer the last question first. It seems the unit does not have an Auxiliary Hydraulic Pump, driven by an AC motor, and that there is some kind of tubing arrangement that can be used to direct the output of the DC Hydraulic Ratchet Pump to the hydraulic system. This is...

And, Chiranjeevi is correct--one adjusts the output voltage of an LVDT, not the input voltage to the LVDT, which is constant from the turbine control system. The output voltage of the LVDT is the input voltage to the LVDT feedback circuit of the turbine control system. Please write back to...

Widsom, I was referring to a three-pole, high-voltage breaker (11,000 Volts to as much as 13,800 volts). The generator outputs of many power plant-sized generators are in the range of approximately 11,000 to 13,800 volts. There are many relays, or sometimes one single multipurpose relay...

Doubt. Not a good word, but sometimes necessary and should make you feel good if you successfully challenge what, at first glance or read, can sometimes seem in error. The PPRO's main speed pickups are the overspeed signals connected to the PPRO. But <Q> and <P> do also know what each other...

Exactly as suspected. It is improper engineering practice to use a relief valve to set a system pressure. A relief valve's purpose is to protect the pump and/or system from over-pressure--<b>NOT</b> to control pressure. (There is only one exception to this rule that occurs on many GE-design...

So, I think the FFH comment was trying to say the difference in Factored Fired Hours between the two times was 700. 700 can be a lot on a machine which is started multiple times and which has not had a thorough off-line compressor water wash, and which has not had a major maintenance outage...

Hi Wisdom, An infinite bus is a a very large grid with tens or hundreds or even thousands of generators all synchronized together supplying a very large aggregate load. Think Western Europe, or the UK, or North America, or even Texas (yes; they have their own grid). In my mind's eye, an...

chiranjeevi, Have you searched GEH-6721, Vol. II, or Vol. III for information on the alarm? If so, what did you discover?

Also, please tell whether hydraulic accumulators are working or not on the machines with hydraulic issues.

Please describe how you are adjusting the hydraulic pumps.

ENGORABY, I find a great deal of information on YouTube, but as with most free information available on the World Wide Web they are prepared by novices and can be sorely lacking in details. Many seem to be filmed in response to discovering some feature or nob that was previously not noticed...

>Any suggestions or recommendations on subject matter? No; there's something which hasn't been told or which is being missed or mis-perceived. There's just not enough information and data to be able to say any more.

To adjust the "zero stroke" voltage to 0.70 VAC RMS, +/-0.02 VAC RMS, you need to loosen the lock-nut on the threaded rod of the LVDT when the IGVs are at the minimum mechanical stop (which should be slightly less than 42 DGA, if that's the minimum operating angle). Using a TRUE AC RMS voltmeter...

Certainly the choke should be full open during operation. What does the manufacturer say about the problem?

My doubts are: How much of the rated output of the supposed gas turbine does 4-5 MW represent? 20% 10%?5% 3%? Do you have the correction curves for the supposed gas turbine? If so, have you applied the correction(s), and what do the corrected data indicate? (Correction curves can include...

With the unit on cooldown (ratchet), and no hydraulic pressure it should be possible to use a long bar or strong pieced of wood and pry the IGV ring fully open manually. I have seen some sites use a hydraulic jack under the joint of the IGV ring, with wood blocks underneath down to the turbine...

Mohanna, Hmmm. Methinks there is something amiss with the data you provided (the commissioning date.?.?.?) You said the starting means was a diesel engine, and you said that thermal protection was the cause for the aborted start (trip?). Diesel engines do require maintenance, and the...

Mohanna, I have never heard of a TurboCare turbine, but I know of a turbine services company named TurboCare. Can you tell me if the turbine in question was actually manufacturer by TurboCare, or possibly refurbished and/or relocated by TurboCare? Can you provide any other information...

Touhana, AC power generation occurs at a particular frequency--50 Hz or 60 Hz, depending on which part of the world, or country, you are referring. However, on an AC power distribution and transmission system (a "grid") to which multiple prime movers are generators are synchronized (that's a...

Latsany, After using my preferred World Wide Web search engine, I believe the place to start trying to understand the system is to research wound rotor induction motors. You should also ask to see the instruction manuals for the drives at your site and/or search the World Wide Web for...