Thanks for your fast answer.
Is your company providing current clamps with analog output already in the acceptable range of the ADC-40 input?
Is there some accessory your company can provide for reading, reducing and isolating 400V or 230V voltage down to the input range of ADC-40?
If not, would you kindly suggest me where to look at?
And No, I don't think to measure voltage and current at the same time. I'm considering to sample three phases at the same time though, that would complicate the matter
and bankrupt my tight budget.