High capacitance,high voltage electrolytic capacitors

Discussion in 'The Projects Forum' started by ezekielizuogu@yahoo.com, Apr 14, 2012.

  1. ezekielizuogu@yahoo.com

    Thread Starter New Member

    Apr 13, 2012
    8
    0
    Hello members,

    My project requires electrolytic capacitors that combine high capacitance with high voltage.I have searched most of the online electonic component sellers in the US,China,India and what i find is that those that have high capacitance come with very low volage ratings while those that have high voltage come down with very low capacitance values.Precisely am looking for elecrtrolytic capacitors of 240,000uF,500V or anything around that range of capacitance and voltage,plus/minus 5000uF.Again,if i can get caps of 20,000uF,500V,i can combine twelve of them to give 240,000uF,or combine caps of 40,000uF or 60,000UF to give 240,000-UF.
    It will be appreciated if members can give me links to sources of such caps.
     
  2. chrisw1990

    Active Member

    Oct 22, 2011
    543
    41
    dare i ask why you need such values?
    there are limits to the capacitance a mains piece of equipment can have, due to the fact that you dont want people to electrocute them selves after unplugging it.. its in one of the basic tests of a product being tested before market release
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,348
    Hello,

    I hope the capacitor bank is not for a railgun or something like that.
    It would not be allowed over here to discuss.
    Take a look at point 6 of our ToS:
    http://www.allaboutcircuits.com/l_tos.html

    Bertus
     
  4. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    [​IMG]

    They do exist, but can you afford one and do you have room for them. It might take several in parallel to reach the high capacitance values you desire.
     
  5. ezekielizuogu@yahoo.com

    Thread Starter New Member

    Apr 13, 2012
    8
    0
    Bertus,No,the caps are not for railgun or any such thing.There are supercapacitors that come in the form of even 5 farads or more.I am sorry for the flag i ignorantly put on the thread.
    If i cant find large value caps,i can make do with caps of 15,000uF,being careful of course about the danger of shocks,handling such voltages.
     
  6. Wendy

    Moderator

    Mar 24, 2008
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  7. allibut

    New Member

    Jul 18, 2012
    21
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    There are large value caps in air-con units. If you look at 3 phase installations they may be 480V rated.
     
  8. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    In the professional world there are for instance Thyristor banks for 20 kV. One I saw is actually used as kind of a crowbar. The power level is in the MW range so the connections are made with solid metal bars.

    Seriously, 240,000uF/500V? What is the way to charge these?

    OP is not saying if AC or DC, and what is the intended purpose.
     
  9. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    1. If you request professional components, learn professional spelling first.

    2. Use "I", or "i", but not both together, it's disturbing.

    3. Show us your circuit/project.
     
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