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Discussion in 'Electrical Forum' started by Zaffy, Feb 19, 2012.

Discuss transformers in the Electrical Forum area at

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  1. Zaffy

    Zaffy Guest

    Please can anyone explain the theory behind transformers and 12 volt halogen bulbs.

    My dimmer transformer is about ten years old and is made by IBL lighting.
    It is a 4105.00, this is presumably their number.
    20-75VA 24 230AC 50/60HZ 75VA max

    Six 12volt halogen bulbs run off it. What wattage is allowed.

  2. Engineer54

    Engineer54 Guest

    You don't say what the wattage is on these 6 12V halo's

    I wouldn't go more than 50/60 total watts max!!

    That transformer is getting a bit long in the tooth now at 10 years old. Think about replacing it, with a suitably sized unit for your needs...
  3. Zaffy

    Zaffy Guest

    Dear Enginner 54,
    Do you mean 50/60 watts max each bulb? That would mean just 10 watts per bulb.
    the total of all six bulbs equalling 50/60watts max? That would work out to 360 watts max.

    The lights are not working and I wondered if I had overloaded the transformer.
    I was thinking of buying an exact transformer replacement, the model is still made by IBL Lighting.
  4. cook1e

    cook1e Regular EF Member

    at that wattage 1 transformer per lamp

  5. telectrix

    telectrix Scouser and Proud of It Respected Member

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    well, 1 halogen lamp is usually 35VA or 50VA, so looks like a definite overloading . personally i would use 1 transformer ( 60VA) per lamp.
  6. ian.settle1

    ian.settle1 Forum Mentor

    Ever so slighty
  7. Engineer54

    Engineer54 Guest

    Wow, ....And there was i thinking that you had one of these set's, with those 10 or 15W push in Halo lamps.!!! Just how long did this transformer last, with trying to drive 360W ....not long i shouldn't think!! As others here have suggested, use a single transformer with each lamp, or go with 230V halogens, they tend to be a more reliable set-up in the long run anyway...
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