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transformers

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hawkks | 03:27 Thu 26th Aug 2004 | How it Works
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if voltage is applied to the secondary side of a step down transformer will it damage the transformer
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No, it shouldn't, all you are doing in effect is turning it into a step up xformer
Be aware that if you are intending it to be used as a step-up transformer the current ratings of the primary and secondary are normally very different. ie. step down normally have much lower current rating on the mains(pri) side compared to the secondary.
Be carful when applying votages the secondary. You could end up with a very large voltage on the primary if it was a transformer intended for mains step-down. It's the turns ratio of the transformer that gives a good idea. If it is 20:1 there will be 20 times the voltage on the high turns side compared to the low turns side. A car HT coil (which is a transformer) produces 15 to 20 thousand volts form a 12 volt car battery. Remember we are talking about AC currents normally with relation to transformers. Be careful out there... your first electric shock could be last thing you feel !!

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