Thanks for your comments.
In my humble opinion, the Schneider Electric advice you have kindly attached is most relevant for general household appliances only.
Does it fits tighter tolerant military and hospital grade equipment, as well as highly critical audiophile equipment, where material selection, components and parts are closely matched to an optimized design and tested around a highly regulated power supply value?
I don’t think so. For my case its 220VAC.
Therefore Power Regenerators with a perfect wave is called for that can only be provided to satisfy and meet the criteria demanded by audiophiles.
Of course the +11VAC over the design supply of 220VAC as demanded by my equipment will definitely work fine, in fact most if not all highest priced audiophile equipment will work too even in the highly fluctuated and distorted power supply.
But will it help to satisfy the most discerning and critical listening pleasure?
I most certainly don’t think so.
And what about longevity of the highly priced equipment?
In addition, referenced to PS Audio P10 user manual advised that settings with High Regulation mode will benefit most for tube equipment, which I am in agreement and is relevant and important to me, as tube equipment is voltage dependent.