Search results

davidmcc, One more thing: Two people should be stationed, one on either side of the axial compressor, when the shaft is being turned for the first time--listening for "rubs" (which sound more like scrapes actually, like someone dragging their fingernails on a chalkboard). The sounds may be...

davidmcc, It's VERY important to keep oil flowing to the bearings when the shaft is hot even if it can't be turned. VERY important. Heat from the shaft can cause the bearing material which is plastic (melting) at about 300 deg F (approx. 150 deg C) and the bearings can be damaged if not...

Topcat123, I don't have access to a Mark VIe project file at this time, so I can't look at the PTUR configuration, but I would surmise there is some kind of 'Help' for the fields which might have some detail about the units and the scaling of the field's value. If it's really seconds...

niazbibiyana, I think they are referring to using compressor extraction for some process (like instrument air for a large facility)--not for normal uses of extraction like cooling and sealing air and self-cleaning inlet air filters and IBH--and only at Base Load. My best guess would be...

demigrog2, Thanks very much for the information!

Aptx4689, What does the P&ID indicate the vent is for?

Khairul, The only other times I've heard of so many Diagnostic Alarms is when there was serious problems with the power supply/grounding system--and when factory- and commissioning personnel had left a LOT of unused inputs and outputs enabled. If you're unwilling or unable to discuss the...

I've been hoping someone else would respond, because my response to a 260 msec closing time is: WOW! That's more than a quarter of a second, which for a 50 Hz system is about 12.5 cycles, and for a 60 Hz system about 15 cycles. That just seems very slow. I'm much more accustomed to seeing...

Rajesh, I looked into this many years ago--and it was never clear how OSIsoft PI could get archived data from some kind of back-up media, either optical (CD; DVD) or tape. At that time, my personal recommendation was to get another hard drive and use it in the Historian as the archive...

Aptx4689, I do have a day job, and it's keeping me quite busy these days. I don't get paid for this gig at control.com, and when I have time I write (some members of my family think I spend too much of my non-work time on control.com). You would have to contact the author of the trade...

Aptx4869, The part in the red circle is the shaft "extension" which connects the AC motor output shaft to the pump impeller shaft. If the pump didn't show any sign of damage or wear it could be that one of the couplings on either end of the shaft extension was loose and spinning. But...

Aptx4869, Well, I'm glad you liked my reply; someone didn't, and it's frustrating when they don't take the time to ask for clarification or correct me.... Anyway, I choose to communicate with people via control.com--because I can answer one question and help a LOT of people (who read these...

Chutney, You say the Mark VIe was installed in 2006-2007; that's not old but it's not young, either. You can see the effects of heat yourself, especially when the I/O packs are installed in vertical rows. And TMR packs on terminal boards are all very close vertically. The heat generated by...

Pray tell--which I/O Packs are failing? Is it random packs, or more generally DI/DO packs, or analog I/O packs? What are the Diagnostic Alarms which are present on the packs before they require replacement? Has something changed recently which has caused the temperature inside the...

The act of steam condensing on the last stage(s) of a condensing steam turbine generates static electricity--hence, the requirement for a <b><i>condensing</b></i> steam turbine to have shaft grounding brushes, regardless of the type of equipment being driven by the <b><i>condensing</b></i> steam...

Generally, bearings are under vacuum to help prevent lube oil from leaking out along the shaft, and to prevent the accumulation of high-temperature--and potentially explosive--oil vapours inside the bearing housing. Usually, loss of vacuum in a bearing housing will result in oil leaks and...

I read this differently.... And, the use of terms by the original poster was inconsistent, which doesn't help. <i>Turbine</i> inlet temperature--sometimes called "firing temperature"--and approximated on GE-design heavy duty gas turbine control systems using the Combustion Reference...

It definitely sounds as if something is loose; possibly stator through-bolts? Hope your outage is soon.

When did this problem start? After a DCC/SDCC replacement? Was there some problem with the GT2 HMI CPU that caused the software to be re-loaded on the HMI? When was the last time the HMI CPU case was opened and vacuumed of dust/dust bunnies? Have you tried using the Logic Forcing...

Have you tried fixing the dampers? Usually they get mechanically bound/stuck and/or rusted, which prevents them fully from closing by the damper weights. Sometimes, the weights vibrate loose, or are misadjusted. Other times the dampers or the mechanisms get bent during fan removal and...