Current transformers do not care about the primary voltage, only the current. The only voltage of concern is the secondary voltage across the burden resistor as determined by the VA burden rating.VA, Volt x Amp is the power rating of the device, and is directly proportional to any ratio change, as in a transformer secondary etc.
You need to state the voltages you are working at.
If you placed a 100Ω across a supply to draw a maximum of 15va
Or e.g. a voltage of 38.75v with the 100Ω load will be .3875 amps or 15va..
Max.
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