source=3DTypical isolation factor is twice the rated voltage plus =
1000Volts (i.e. for 240V =3D 1480Volts).  I would recommend 8 or at =
least at the very least 4 samples per quadrant for 50/60Hz especially if =
you ever consider KVA results someday.

Could you offer more specific details on?
> PIC or AVR into the environment directly without opto,
> feeding it through divider or some 300v DC/ 5v DC converter,
> STM Viper for example. Then you could use IR or RF to
> transfer data.
>
I don't recommend RF in that environment unless you add a few orders of =
filtering.  Also could you please converse on the incoming peak-peak =
value, instantaneous spikes as well phase shift handling method in your =
example.  I'd like to try your concept if feasible.
Tx.  Sounds like a nice challenge.

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