Inrush current

Discussion in 'General Electronics Chat' started by universboy, Jan 27, 2005.

  1. universboy

    Thread Starter New Member

    Jan 27, 2005
    2
    0
    Hi,

    I have a problem. I2m using toroidal transformer, but when I switched on,
    it blows fuses 25A, How can I eliminate the inrush current?

    Best Regards.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    I'd start by looking for a wiring problem or a shorted primary in the transformer. That's a lot of current draw.

    If all is well, look for inrush current limiters. I'm using one on my big stereo amp, so it just turns on now - it used to dim the room lights. If the problem is only at turn on, though, consider a slo-blow fuse.
     
  3. universboy

    Thread Starter New Member

    Jan 27, 2005
    2
    0
    There is no wiring problem , all the problem is inrush current. can you send me part number or name or circuit for inrush current limiter?


    Best Regards.



    I'd start by looking for a wiring problem or a shorted primary in the transformer. That's a lot of current draw.

    If all is well, look for inrush current limiters. I'm using one on my big stereo amp, so it just turns on now - it used to dim the room lights. If the problem is only at turn on, though, consider a slo-blow fuse.
    [post=4853]Quoted post[/post]​
    [/quote]
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    I don't have enough data to make any guesses, but check out Panasonic's line of ZNR transient surge absorbers. Get some data and application sheets to make a selection. Digi-Key carries a couple of pages of them in their catalog (digikey.com).
     
  5. Brandon

    Senior Member

    Dec 14, 2004
    306
    0
    Whats your transformer specs (turns on primary, secondary, core size and composition) and what are you trying to have it do? (primary voltage/current and secondary voltage/current)

    I have some experience with making torroidal transformers as I had to design one for a project at school to build a stepup switching DC/DC.
     
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