Hi,
25A on 230V is a lot of power.
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Please gice more information:
When you connect a scope to measure the current, then what signal do yu expect from your "current source?"
1) a clean sine wave with an RMS current of 25A
2) a phase controlled signal with RMS current of 25A
3) a constant DC current of 25A for the positive halfwave and a negative DC current over the complete negative halfwave? (both as good as possible)
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a) Do you like to drive an existing load with the 25A and the load dissipates most of the power?
b) Or do you like the "constant current source" to dissipate all the power? (as current sink)
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Generally ... asking questions:
Don´t expect our answers to be more detailed than your question.
If you want fast and detailed answers, then give pictures, schematics, values and other usefull informatons.
Klaus