How does the overvoltage protection from AFDD works?

[bigiuclau]

So i know the arc detection is made by a MCU.
The overload and overcurrent by a magnetic coil and bimetal.
But what about Overvoltage ? I only know it works for >270V.

 

[static zap]

So i know the arc detection is made by a MCU.

I would expect another MCU decision , with potenital divider tree somewhere !
but uk youtuber I watched ran out on oumph on his variac !

 

[Lister1987]

I would expect another MCU decision , with potenital divider tree somewhere !
but uk youtuber I watched ran out on oumph on his variac !

Photonicinduction perchance? The guy is nuts

 

[static zap]

Photonicinduction perchance? The guy is nuts

No Not him , he always had volts to spare. (3 phase supply-that's devotion)
(My washingmachine feels nervous)

..Have got me thinking opto-coupler.. (would be temperature sensitive)

 

[Lister1987]

(3 phase supply-that's devotion)

Whats the bet he taped the nearest substation himself to get it? ?