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Toroïdale transformer how much VA ?

Discussion in 'Electronic Basics' started by David, Nov 30, 2003.

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  1. David

    David Guest

    I've bought a 250VA 220V=>24V transformer to power a 24V 250W lamp, however
    the temperature increases when I power on. (after 30 min, it is about 40 or
    even 50 °C )

    What is the max temperature for a classical toroïdale transformer ?

    Should I choose a 275 or 300VA to work in good conditions ?

    Thanks for any help.
  2. cpemma

    cpemma Guest

    My catalogue gives temperature *rises* of 55-65C (depending on brand) at
    that VA.
  3. David

    David Guest

    ok, but rise, I suppose, it means ambient (about 25°C) + 55°C so about 80 °C

    Thanks !
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