Dear All,
Thank you for answering / commenting on my suggestion.
I agree with my friend Emil about the cost of such a dedicated / specialized module, but this module as described by Emil would be suitable for power analysis, including harmonic content, THD, min. max. voltage and current values, etc. Perhaps it is my mistake to have written power analyser in my original post - a module with the described inputs but with 'normal' analogue inputs would be suitable for power metering, alarming, instant (average) values, etc - I believe, without being an expert, that this would not be so expensive. Imagine all the benefits an OPLC (especially the enhanced family) could support for such a meter!!
Anyhow, it was just a suggestion - no hard feelings if not implemented!!
Best regards to all.
Petros