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  1. shocker23

    Effects of harmonics

    Marmite, thank you for the link. However since I have started knocking down the pages of IEEE 519-1992, I wanted to exhaust 519 before moving on to another document. I found what I was searching for because of it. The objectives of the current limits are to limit the maximum individual...
  2. shocker23

    Effects of harmonics

    What levels V(THD)are above industry standards in a substation with a capacitor bank. What level of harmonics is acceptable. I am looking into what levels of harmonics (w/o a study) that can we valadate a need to install a hi-pass filter, in the cap bank curcuit. Im currently researching IEEE...
  3. shocker23

    (BIL) Basic Impulse Level 38 kV

    a substation's has a 3-step 21.6 MVAr capacitor bank where 38 kV vacuum switches are used to switch the bank in and out. When solidly grounded Y system has a line to ground BIL of 150? if you take the rms value of 38 kv = 27 kV and the BIL at 27 kV= 150. The system is 34.5 kV and the...
  4. shocker23

    Vacuum Switches

    about BIL, at 35 kV, whether to use 150 vs 200 BIL. where is the best place (non IEEE member) to find/prove which value you choose for the application of an vacuum switch substation application?
  5. shocker23

    Vacuum Switches

    DCP, thank you, and Cooper only goes to 27 kV. shocker23
  6. shocker23

    Vacuum Switches

    Does anyone know of another manufacturer of HV, 38 kV+ vacuum switches for capacitor bank switching, other than Joslyn?
  7. shocker23

    HV Potential Transformers

    I have noticed that the accuracy of potential or current transformers used for metering is expressed "0.3 WXYZ". What do the letters represent? this could be on a 800:5 1600:5...etc. Shocker23
  8. shocker23

    calculating or obtaining xfmr load & no load losses

    Thank you all for your input(minus one). I guess I have to apologize for being new in the industry. My knowledge and insight on some issues may be slight but very willing to learn. That not withstanding the capacity of the xfmr=150MVA. I do have the wind plant gen information. And yes the...
  9. shocker23

    calculating or obtaining xfmr load & no load losses

    In currently creating a spread sheet to size a capacitor bank at a wind farm. Because turbine is an inductive machine cap banks are used to offset the inductive influence at the collector system. The xfmr mfg's cut sheet did not provide it. I have my collector CU losses from wind plant, the CU...

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