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HV standoff distance

Discussion in 'Electronic Design' started by David Lesher, Feb 2, 2013.

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  1. David Lesher

    David Lesher Guest

    Someone has tried to tell me that the free-air distance needed
    to prevent arcing varies inversely with frequency; i.e. a 10 KV
    RMS 60Hz conductor will need less spacing than a 10 KV RMS 25Hz
    one.

    I'm no power distribution engineer, but I can't recall anything
    close to that. I asked my MIT-grad friend as well, but outside
    of the obvious end case [0 Hz, where peak=RMS] we both came up
    blank.

    Obviously, OAT, %RH, etc alter the result, but frequency?
     
  2. David Lesher

    David Lesher Guest

    Thanks. Reading now, but I should have been more explicit...I'm
    talking DC-100Hz, not RF.
     
  3. geometry of the conductors will make a difference too. You will get more
    corona discharge and breakdown between two sharp points than the two
    spheres the same distance apart.
     
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