I wasn't successful in tracking down the surge withstand strength information on the internet. It would be ironic if the introduction of AFDDs required the addition of SPDs!
See [Table 443.2]. Equipment which goes in a 230/400V DB needs to be able to withstand 4kV transients. (Meters, including smart meters, have to withstand 6kV!) One assumes manufacturers design their AFDDs to match.
I wasn't successful in tracking down the surge withstand strength information on the internet. It would be ironic if the introduction of AFDDs required the addition of SPDs!
See [Table 443.2]. Equipment which goes in a 230/400V DB needs to be able to withstand 4kV transients. (Meters, including smart meters, have to withstand 6kV!) One assumes manufacturers design their AFDDs to match.
