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  1. crshears

    KW, KVA, KVAR relationship

    Hi JC, The theory that follows holds up in real life. The power triangle shows [1] real power, where voltage and current are in phase; the product of volts x amps equals watts, 746 of which make one horsepower, which involves doing actual work, which requires energy expenditure, in your case...
  2. crshears

    KW, KVA, KVAR relationship

    Just to help you double check your math, this page https://www.allaboutcircuits.com/textbook/alternating-current/chpt-11/true-reactive-and-apparent-power/ gives a diagrammatic tutorial on real, apparent and reactive power. Like Bill [waross] said, power factor is determined by the load, not the...
  3. crshears

    KW, KVA, KVAR relationship

    Welcome to the forums, JC. My first questions are, "Measured where? And how have you determined PF is leading?" Since you just joined and your profile doesn't tell us much about you, my response may be a bit pedantic, but I've learned to live with that. As a retired power system / grid...
  4. crshears

    TC bolt

    wrong forum
  5. crshears

    power factor issue

    Hello zoo, waross is correct; I agree more with his second recommendation, viz., you should find a local expert in power factor penalties. My reference was to a power factor correction unit that connects at the point of common coupling, meaning where your electrical services and your power...
  6. crshears

    power factor issue

    Hmm, have I not seen threads in these fora relating to commercially available small scale power factor correction units for use at Point Of Common Coupling [ POCC ] ? You might want to do a search . . .
  7. crshears

    Paralleling dissimilar Generators

    More problems, or more generators? :cool:
  8. crshears

    Siphon

    Why not? If lower valve is closed and aspirator draws water up from the upper reservoir, will it not spill over the saddle of the apogee and prime the downstream side as well? Or am I missing something?
  9. crshears

    Siphon

    If a valve is placed at the outlet and closed during priming, cannot an aspirator be used at the top of the siphon to extract the contained air? This would obviate the need for a foot valve at the inlet.
  10. crshears

    Electric Boiler Question

    "Unfired" perhaps, but not without energy input; ability to liberate steam in such volumes as needed to preclude boiler or system over-pressurization is still very much in play.
  11. crshears

    Concrete Shrinkage modelling with ANSYS

    Wrong forum Please delete this one and re-post your query in Concrete Engineering forum here https://www.eng-tips.com/categories/concrete-engineering.10072/
  12. crshears

    Wait to reenergize following lightning?

    We didn't use that at all in my utility; all 500 kV breakers and thus their auto reclosure schemes were all three-phase.
  13. crshears

    Wait to reenergize following lightning?

    SPAR: short period auto reclosure, or something else?
  14. crshears

    Wait to reenergize following lightning?

    Tree removal at 230 kV? Sounds like forestry practices / R/O/W clearing operations were either not being performed or seriously behind schedule . . . Practice when I was working was to confirm all infeed breakers open with Hold-Off / Hot Line Work Order tags [electronically] placed on all...
  15. crshears

    Meshing in Femap

    Wrong forum for this question
  16. crshears

    Generator loss of PMG

    Have you no electricians or electronics technologists under contract or on site to troubleshoot the problem? Were not manuals supplied with the equipment? Is the unit still under warranty?
  17. crshears

    LO/TO - remote circuit breaker

    Are you suggesting that the cable will be left on potential from the wind turbine at all times? I'm used to the cable being off pot while the connections are made, at which point the supply and load end breakers are closed to first pot the cable, then place it on load. This would suggest to me...

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