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  1. sparky1976

    System Integrators for Web-Based Power Meters?

    Peebee, I have several different meter mfr in my site,and want to get kw and other number from meter in simple way, I use matrikon product, use their OPC modbus server and and desktop historian, and do math in opc to xl. and they not expensive like PI from OSI.
  2. sparky1976

    20 minutes of Motoring Diesel Generator

    Everyone, thanks for the input, the report showed that operator should not cut the fuel to keep lubrication for the injector, and we install generator breaker failure protection scheme for with time delayed 1 minutes for diesel and 30 seconds for steam turbine to be on safe side.
  3. sparky1976

    20 minutes of Motoring Diesel Generator

    Hi, I've been waiting to write this for 8 months just to proof that the engine is OK. About 8 months ago we have an incident that generator breaker was fail to open, resulting approx about 20 minutes we have reverse power about -1 MW. At that time the operator donot realize that breaker fail to...
  4. sparky1976

    DC For emergency lube oil pump in steam turbine

    guys dont get me wrong, we do Monthly maintenance on the battery banks, the failed battery was tested about 3 weeks before black out and fails. Weekly run emrg LO pump, and 2 yearly do load bank test with individual cell recorded Seems VLA is the best choice, I will try to squeeze the...
  5. sparky1976

    DC For emergency lube oil pump in steam turbine

    Scotty, Thanks, The battery that fail is 4 years old, after sending to a company that do battery autopsy it was dry out and internal corrosion problem not sulphation, the battery is VRLA GEL tubular plate. the size is 1800 Ah, 2V/cell, 60 cell. On your reply you said "dual battery strings...
  6. sparky1976

    DC For emergency lube oil pump in steam turbine

    Hi, I work in Power Plant that its sister company has steam turbine breakdown caused by failure of DC emergency during black out, We've bid to replace the battery system, Since the supplier or battery manufacturer trying to sell us their product so I feel their "technical input" is somewhat...
  7. sparky1976

    Shaft replacement in small motor

    What we've done when we change the shaft from rotor is same as most of the guys in this forum, the only difference is when w insert the new shaft to rotor, we freeze the shaft.
  8. sparky1976

    Brief removal of cooling on generator stepup transformer ok?

    Pete, //Additional fans is easy. There is no practical way to rig up additional pumps while the transformer is running since that is intrusive on the oil system. But perhaps as someone else suggested wire alternate power to some of existing pumps\\. Eventhough you not interested, the pumps...
  9. sparky1976

    Calibrator calibration interval standard

    We have been sending our calibrators for calibration to recognize calibration lab. This always done once a year for the last 6 years since our plant startup. This year I've been ask by Cost control manager, Why I need to send out calibrators for calibration every 12 months, and my stupidity...
  10. sparky1976

    Ge 369 motor protection relay

    I would set a timer to the Logic inside the relay, if sime one accidentally push the E-stop will not trip the motor eg 200 miliseconds, specially if the Estop button donot have protection hood for accidentally push. regards pitat
  11. sparky1976

    undergraduate electrical online degree

    Dear all, I would like to continue my education,but my work condition do not allow me to go to campus, so I think I will enroll to "e distance learning program". after some search, its so much information, university that offer online learning. It got me confuse. I have 3 years of intensive...
  12. sparky1976

    Single to Multi mode conversion

    Try Blackbox they have various product.
  13. sparky1976

    820nm device on 850nm switch ????

    Hi, I got several 820nm multimode device 10Mps(a remote electrical meter)I'm thinking of buying a switch for that substation, can I use 850nm switch 10Mps, because I cannot find any swicth that specified 850nm ? thanks Pitat Haeng
  14. sparky1976

    Laser transmission data rate upgrade

    Trevor, try to visit Hirschmann, or Blackbox web site they have some good info about what kind media converter you need.
  15. sparky1976

    surge due to "bump" test for motor rotation?

    Hi, Just a silly question, In motor junction box (where you connect the motor lead to cable feeeder) in MV motors usually have some kind of arrester to to protect motor from switching surge, is that count on this thread ?
  16. sparky1976

    Excessive wear of carbon brushes on slip rings

    Hey guys, Is that a thread thats explain exessive wear of bruch caused by silicon coating or something,the guys that wrote the thread found out that one of the duct to brush just newly resealed by silicon, forgive If I'm wrong but I think there a thread like that in this forum.
  17. sparky1976

    OHL trip under foggy conditions

    Hai, I experincing the same problem withmy 150kV dist line, its only 20 km, but near coastal line,(aprox 1km). We choose to use polimer onsulaotr with more leakage distance but the same (almost the same)phisical length with existing ceramic fog insulator, to minimaze stringing and retension...
  18. sparky1976

    Flooding in the Substation Area

    For start try this one. Hope it help. http://www.usda.gov/rus/electric/pubs/1724e300/1724e300.pdf
  19. sparky1976

    Transformer Turn Ratio test intermittent failure

    What type of your TTR test equipment, have you try to put low voltage eg.220V to your 44kV terminal and chek the voltage on your 7.2 kV terminal.
  20. sparky1976

    Transformer oil leaks, How to repair it ?

    Guys, Probably its little bit late but I think I need to post the result of my repair to leaky xfmr. Here's what I did, 1. I get permission to spend some money to bring a contractor that specialize on xfmr oil filling with their purifier. We change the gasket on 2 xfmr that the operation give...

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