seriestransformerwinding
I have a transformer with two secondaries, one is 24 V / 500 mA and the other is 12 V / 200 mA. I want to wire them in series to make a center-tap transformer:
simulate this circuit – Schematic created using CircuitLab
I know the voltage is going to be sum of two winding.
How do I calculate the current?
This is OK, it's not a problem what you've done but note that the two individual bridge outputs are not isolated and this means they can't be connected together (N1 to N2) without the voltage levels changing. If you want a +V, 0V and -V supply use this: -
simulate this circuit – Schematic created using CircuitLab
Due to an error in my calculations, the transformer's impedance was way too low, allowing a large amount of current to flow.
Best Answer
Those currents aren't currents that will flow, they are the winding's maximum rating. That means the current should not exceed that value or you'll overload the transformer.
The maximum current when using 36 V will be 200 mA as that is limited by the 200 mA rated 12 V winding.