@snowhead the link did not work for me.
So given the above why would a type A not operate? It seems that EV charging needs much improvement in design. Not that I have studied the matter in any depth. So what, if any effect, would there be on SPD or AFDD just asking as a matter of idle interest.
Because a type A would be blocked by DC - it is suitable for AC and pulsating DC.
In addition, the DC throughout the system would block many of the other rcd, which as standard tend to be ac
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Sorry, missed the point about spd etc.
Spd shouldn't be an issue, they either work by having a spark gap, (which the DC should be too low to jump) or a voltage dependent resistor (used to be a trade name metrasil) which drops sharply in resistance after the knee point.
As for AFDD - I doubt even the makers would know!
I agree the situation with ev charging is a mess, it appears driven by manufacturers and their wants.
I don't think it should be part of the 18th, it's a separate device, so should be treated as such, the 18th doesn't go into the ins and outs on how other devices work - they have their own specifications.
In my view the 2nd ammendment (I would have hoped the first would) should be very simple, the charge points shall be fully self contained, and not reliant on external protection devices, contain all operational and protective features for the charger, and prevent DC back into the system, detect any earth leakage (which implies an rcd), and detect or prevent an excursion of the local earth in potential (which is achieved by a local TT, or specialist devices)
Not go down a rabbit path on how it's to be done!
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